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Schlumberger Technology Corporation patents
Recent patent applications related to Schlumberger Technology Corporation. Schlumberger Technology Corporation is listed as an Agent/Assignee. Note: Schlumberger Technology Corporation may have other listings under different names/spellings. We're not affiliated with Schlumberger Technology Corporation, we're just tracking patents.
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Fault tolerant inverter or controlled rectifier system
A fault tolerant inverter or controlled rectifier system includes a first leg having at least one switch device, a spare leg having at least one spare switch device, a spare leg connect switch associated with the spare leg and the first leg, a fault detection sub-system for detecting a fault in the first leg and outputting a signal on detection of a fault in the first leg, and a leg selection control sub-system that receives the signal output by the fault detection sub-system and controls the operation of the spare leg connect switch in accordance with the output signal, such that on detection of a fault the spare leg may be activated to take over the operation of the first leg.. . ... Schlumberger Technology Corporation
A subsurface logging tool that is deployable in a wellbore that traverses a formation includes a gamma-ray scintillation detector with a thallium-based scintillator material. The scintillator material is suitable for high-temperature downhole environments (i.e., above 70° c.). ... Schlumberger Technology Corporation
An acoustic transducer is provided. The acoustic transducer includes a housing, a backing, a piezocomposite element adjacent the backing within the housing, and a diaphragm covering on an outward facing surface of the piezocomposite element.. ... Schlumberger Technology Corporation
Optical sensor for detecting a parameter of interest
An optical sensor apparatus (102) comprises a length of optical fibre (302) capable of supporting forward direction propagation and reverse direction propagation. The length of optical fibre is interrupted by a plurality of longitudinally spaced shunt devices (220, 306, 308) disposed along the length of optical fibre (302). ... Schlumberger Technology Corporation
Multiphase flow meters and related methods having asymmetrical flow therethrough
Multiphase flowmeters and related methods having asymmetrical flow therethrough are disclosed. An example method includes configuring an inlet manifold, a first flowline, and a second flowline to decrease a gas fraction in a first fluid flow through the first flowline and increase a gas fraction in a second fluid flow through the second flow line; flowing the first fluid flow through the first flowline and flowing the second fluid flow through the second flow line; and determining at least one of 1) a first water liquid ratio of the first fluid flow through the first flowline; 2) a first liquid flow rate of the first fluid flow through the first flow line; or 3) a first gas flow rate of the first fluid flow through the first flow line.. ... Schlumberger Technology Corporation
Surface management of drill string rotation for stick-and-slip reduction
Systems and methods disclosed herein are directed to drilling rigs and, more specifically, to controlling the rotation of a drill string assembly to limit effects of irregular rotary movements form an ac induction motor driven by an inverter, associated with operation of a drilling rig. The systems and methods obtain rotational conditions of the rotary drilling system driven by a motor. ... Schlumberger Technology Corporation
Hydraulic metering system for downhole hydraulic actuation
A technique provides enhanced control over a variety of hydraulically actuated devices, e.g. Flow control valves. ... Schlumberger Technology Corporation
Systems and methods for retraction assembly
The present disclosure relates to a downhole packer assembly that includes an outer skin, an inner packer disposed within the outer skin such that inflation of the inner packer is configured to expand the outer skin, an end support coupled to an outer skin end and an inner packer end, a retraction assembly coupled to the end support via a plurality of connecting members, and a plurality of chambers disposed within the retraction assembly. The plurality of connecting members are at least partially disposed within the plurality of chambers.. ... Schlumberger Technology Corporation
Intelligent pressure control devices and methods of use thereof
A pressure control device may include a body having a central axis extending therefrom; at least one rotatable seal within the body, the rotatable seal configured to seal against a tubular extending through the pressure control device along the central axis and rotate within the body with the tubular; at least one coil within the body wrapped at least once around the central axis, wherein the at least one coil is configured to send characteristics of the tubular to a controller; an outlet to divert fluid from an annulus, wherein the outlet being located axially below the at least one rotatable seal, wherein the controller is configured to control the at least one rotatable seal and its engagement against the tubular based on the characteristics of the tubular received by the controller.. . ... Schlumberger Technology Corporation
System and method for offline suspension or cementing of tubulars
A system for offline suspension of a tubular including a first well having a first wellbore and a cellar formed at the surface of the first well with a rig movable from the first well to a second well. Additionally, a tubular string extending into the first well and a tubular support structure above the cellar of the first well, wherein the tubular support structure supports a weight of the tubular string such that the tubular is suspended from the tubular support structure independent from the rig and through a securing equipment configured to secure the first well.. ... Schlumberger Technology Corporation
Coiled tubing bottom hole assembly deployment
Apparatus and methods for assembling and positioning a bottom hole assembly (bha) or tool string within a well-bore and running the tool string via coiled tubing. The apparatus may include a deployment unit operable at a wellsite to make up and run the downhole tool string into the wellbore. ... Schlumberger Technology Corporation
Methods for making and using retarded acid compositions for well stimulation
Described herein are methods for treating a subterranean formation penetrated by a wellbore with a retarded acidizing fluid containing an acid and an acid retarding agent, the concentrations of which are adjusted based on measured parameter values of the formation. Also described is a method for treating a subterranean formation by introducing an acid to the formation following the introduction of an acid retarding agent to the formation. ... Schlumberger Technology Corporation
Creating radial slots in a subterranean formation
A laser cutting apparatus conveyable within a casing lining at least a portion of a wellbore that extends into a subterranean formation. The laser cutting apparatus includes a housing, a deflector, a motor, a sensor, and a processing device. ... Schlumberger Technology Corporation
Methods of elemental imaging of formations and systems for producing the same
Methods of elemental imaging of a formation include acquiring spectral gamma ray measurement, acquiring a total gamma ray image, deriving structure information of the formation from the total gamma ray image, and applying the structure information to the spectral gamma ray measurement to form an elemental image. In the present methods, the structure information of the formation is derived from comparing the total gamma ray logs for each azimuthal sector to a derived total gamma ray log. ... Schlumberger Technology Corporation
Quantifying tubing defect severity
A technique facilitates examination of a tubing string which may comprise coiled tubing or other types of pipe. The technique involves evaluation of defect severity as it relates to tubing fatigue life reduction. ... Schlumberger Technology Corporation
Burner monitoring and control systems
Systems and methods for monitoring and controlling burning operations are provided. A method of one embodiment includes igniting oil or gas with a burner (282) during a burning operation and monitoring the burning operation with a camera (290). ... Schlumberger Technology Corporation
Hard bearing attachment and alignment systems, apparatus, and techniques
A mechanical bearing includes a hard bearing element and a support element affixed to the hard bearing element, with a joining element between the hard bearing element and the support element, the joining element being more flexible than the hard bearing element and the support element.. . ... Schlumberger Technology Corporation
Systems and methods for performing hydraulic fracturing in vertically heterogenous regions
A hydraulic fracturing system includes a perforating tool configured to perforate a casing of a well and a computing system communicatively coupled to the perforating tool. The computing system is configured to determine a plurality of geomechanical properties associated with a plurality of depths of the well and associated with a subterranean region adjacent to the well based on seismic data representative of the subterranean region; determine stress regime of each of the plurality of depths based on the plurality of geomechanical properties; classify at least one continuous interval of the plurality of depths as a critical net pay (cnp) region based on the stress regime of each depth of the at least one continuous interval; and send a command to the perforating tool to perforate the casing of the well at a depth associated with the cnp region within the at least one continuous interval.. ... Schlumberger Technology Corporation
Wellsite emissions monitoring and control
Methods and apparatus for monitoring and controlling wellsite emissions. A mobile emissions monitoring device is operated in airspace above a wellsite to generate and transmit a monitor signal related to emissions in the airspace. ... Schlumberger Technology Corporation
Systems and methods for determining tool center, borehole boundary, and/or mud parameter
Systems and methods are provided for estimating the tool center position of a down-hole tool, the geometry of the borehole, and/or a mud parameter based on sensor measurements from the downhole tool, even when the downhole tool center is moving over time. At least one sensor may obtain a set of measurements that relates to distance-to-borehole in a borehole at a number of azimuths. ... Schlumberger Technology Corporation
Utilization of dynamic downhole surveying measurements
A method for making dynamic gravity toolface measurements while rotating a downhole measurement tool in a borehole is disclosed. The method includes processing magnetic field measurements and accelerometer measurements to compute a toolface offset and further processing the toolface offset in combination with a magnetic toolface to obtain the dynamic gravity toolface. ... Schlumberger Technology Corporation
Downhole generator system
A downhole generator system including a controlled rectifier for receiving electrical power from a generator and outputting rectified electrical power. A control system controls the operation of the controlled rectifier and a chopper circuit connected to the output of the controlled rectifier connects a load selectively across the output of the controlled rectifier to regulate the output of the generator system. ... Schlumberger Technology Corporation
Degradable elastomeric material
A method can include polymerizing a blend of materials where the materials include polymeric material and a degradable alloy material; and forming a degradable component from the polymerized blend of materials. Such a method can include exposing the degradable component to water where the degradable alloy material reacts with the water to at least in part degrade the component.. ... Schlumberger Technology Corporation
Retarded cement compositions and methods for well completions
Cement retarders are based on blends of lignosulfonate compounds, borate compounds and gluconate compounds. The compounds are present in certain ratios that allow the retarders to operate at temperatures and pressures up to and exceeding about 176° c. ... Schlumberger Technology Corporation
Determining standoff between a wall of a wellbore and a tool disposed in the wellbore
Apparatus and methods operable to determine between a wall of a wellbore penetrating in a subterranean formation and a resistivity tool disposed in the wellbore. One such method includes using an apparent impedance function depending on a frequency variable and a plurality of unknown parameters, at least one of the unknown parameters depending on a formation impedance of the subterranean formation. ... Schlumberger Technology Corporation
Tool lifespan parameter detector
Aspects of the disclosure can relate to systems or devices for detecting a lifespan parameter of a power transistor of an electronic device. In an embodiment, a device can include a differential probe configured to connect to a first terminal and a second terminal of a power transistor. ... Schlumberger Technology Corporation
Methods of degrading polymer composites in aqueous fluids using catalysts
Methods may include contacting a degradable polymer in a wellbore traversing a subterranean formation with a treatment fluid, wherein the treatment fluid is formulated with one or more polymer degrading catalysts; and allowing the degradable polymer composite to at least partially degrade. In another aspect, methods may be directed to designing a wellbore treatment that includes determining at least one degradation characteristic for one or more degradable polymers; formulating an aqueous treatment fluid based on the determined values, wherein the aqueous treatment fluid comprises one or more polymer degrading catalysts; contacting the degradable polymer with an aqueous fluid; and allowing the degradable polymer to at least partially degrade the degradable polymer.. ... Schlumberger Technology Corporation
Modular mobile flow meter system
A technique facilitates evaluation of a fluid, such as a fluid produced from a well. The technique utilizes a modular and mobile system for testing flows of fluid which may comprise mixtures of constituents. ... Schlumberger Technology Corporation
Control of thermoplastic composite degradation in downhole conditions
In one aspect, compositions may include a degradable polymer composite, and methods of manufacturing polymer composites, wherein the degradable polymer composite contains a matrix formed from one or more polymers blended with one or more internal catalysts. In another aspect, methods of using a degradable polymer composite in a wellbore may include emplacing a degradable polymer composite in a wellbore traversing a subterranean formation, wherein the degradable polymer composite contains a matrix formed from one or more polymers blended with one or more internal catalysts; and contacting the degradable polymer composite with an aqueous fluid; and allowing the degradable polymer composite to at least partially degrade.. ... Schlumberger Technology Corporation
Gradually tapered coiled tubing in extended reach wellbores
Maximum penetration of coiled tubing in extended reach horizontal wellbores is significantly increased by using a continuously tapered portion of coiled tubing. In particular, the tubing wall thickness is continuously tapered such that the well thickness gradually decreases toward the far end of the coiled tubing. ... Schlumberger Technology Corporation
Method and apparatus for automated drilling rig sheave friction calibration
A method and autodriller for monitoring hookload in a well drilling system that measures raw hookload; determines a velocity of a travelling block; holds the travelling block in a non-lowering state for a first period of time; lowers the travelling block for a second period of time; calculates contribution to hookload of a component linear in the block velocity; calculates contribution to hookload of a component linear in a direction (sign) in the block velocity; and corrects measured raw hookload by the calculated contributions.. . ... Schlumberger Technology Corporation
Method for hydraulic fraturing (variants)
A method of stimulating the inflow of oil and/or gas from the wellbore, in particular, a hydraulic fracturing method, is disclosed. The method of hydraulic fracturing comprises the stages: injecting a slug of a proppant-free fluid through the well into a formation for hydraulic fracture creation and propagation; injecting a slug of proppant-laden slurry into the formation to create a proppant pack in the hydraulic fracture; injecting a slug of slurry that contains a fluid and the polyelectrolyte complex-based proppant aggregates to create permeable channels in the near-wellbore area of the hydraulic fracture; injecting a slug of a displacement fluid into the well. ... Schlumberger Technology Corporation
Method and apparatus for bi-directionally anchoring a liner in a borehole
A technique facilitates hanging of a liner in a borehole. According to the technique, a liner hanger and a liner may be deployed downhole into a borehole. ... Schlumberger Technology Corporation
Proportional control of rig drilling mud flow
A system includes a mud pump for pumping a drilling mud from a drilling mud source, through a drill string, out a drill bit and into an annular, and a plurality of chokes disposed down stream from the mud pump, including a first choke disposed between the mud pump and the drill string, and a second choke disposed between the mud pump and a mud tank. The system further includes a fluid discharge conduit in fluid communication with the annular space for transferring the drilling mud to handling equipment in fluid communication with the mud tank. ... Schlumberger Technology Corporation
High trip rate drilling rig
A high trip rate drilling rig has first handling equipment to transport stands in/out of setback, second handling equipment to deliver stands to/from well center, and a hand-off position to set down stands for exchange between first/second equipment. Second equipment can include a top drive and a delivery arm translatable along the mast past each other, and a clasp on the arm slidable on the stand for constraint below the upper end, which can allow the top drive to engage/disengage the constrained stand above the arm. ... Schlumberger Technology Corporation
Wear resistant parts and fabrication
A wear resistant part includes a first material including a structure having a surface feature. The first material is capable of maintaining its structure at a temperature from about 1000° c. ... Schlumberger Technology Corporation
Mid-infrared acid sensor
A sensor is provided for monitoring a mineral acid dissolved in a liquid. The sensor includes an internal reflection window which, in use, is in direct contact with the liquid. ... Schlumberger Technology Corporation
Method and system for wavefield separation of sonic data using cross-correlation
A method for wavefield separation of sonic data is provided. The method comprises estimating direct phases of waveforms of sonic data observed with two or more sensors by using cross-correlation of waveform traces at adjacent sensor locations, removing the direct phases from the observed waveforms, and extracting event signals from the waveforms after removing the direct phases.. ... Schlumberger Technology Corporation
Well management on cloud computing system
Well management includes receiving, from a user computing system, a simulation job request for simulating well management on the cloud computing system including compute nodes, and obtaining, for the simulation job request, search spaces for completion stage simulations, fracture stage simulations, and production stage simulations. Well management further includes orchestrating, using the search spaces, the completion stage simulations, the fracture stage simulations, and the production stage simulations on the cloud computing system to obtain at least one optional well plan, and sending the at least one optional well plan to the user computer system.. ... Schlumberger Technology Corporation
Method integrating fracture and reservoir operations into geomechanical operations of a wellsite
A method of performing oilfield operations at a wellsite is disclosed. The wellsite is positioned about a subterranean formation having a wellbore therethrough and a fracture network therein. ... Schlumberger Technology Corporation
Method of performing complex fracture operations at a wellsite having ledged fractures
A method of performing a fracture operation at a wellsite is disclosed for a wellsite positioned about a subterranean formation having a wellbore therethrough and a fracture network therein. The fracture network includes natural fractures. ... Schlumberger Technology Corporation
Method of performing integrated fracture and reservoir operations for multiple wellbores at a wellsite
A method of performing oilfield operations at a wellsite is disclosed. The wellsite is positioned about a subterranean formation having multiple wellbores therethrough and a fracture network therein. ... Schlumberger Technology Corporation
Downhole cutting tool
A rotary tool for milling tubing in a borehole comprises at least one cutter with a cutter body and a cutting surface on the body. Each cutter is shaped and positioned on the tool so as to reduce tensile stress in the cutter, thereby reducing risk of the cutter becoming chipped or broken in use and produces swarf of reduced rigidity, less likely to form a blockage in the borehole.. ... Schlumberger Technology Corporation
Compositions and methods for well completions
Expansive cements for use in cementing subterranean wells comprise water, an inorganic cement and one or more particulate materials that swell upon contact with a water immiscible fluid. The cements may further comprise a water immiscible fluid. ... Schlumberger Technology Corporation
Compositions and methods for servicing subterranean wells
Aqueous fluids containing hydrophobic particles are effective media for cleaning water-base drilling fluids and drilling fluid solids from the interior surface of a casing string. Hydrophobic fibers may be added to a drilling fluid, a spacer fluid, a chemical wash, or combinations thereof. ... Schlumberger Technology Corporation
Replaceable hardfacing
A tool can include a substrate with a support surface and at least one mechanical registration feature. The tool can also include a removable wear material including a matrix material. ... Schlumberger Technology Corporation
Method and system for generating a virtual core
Generating a virtual core includes obtaining acquired data for a region of interest, determining a rock type of the region of interest, obtaining a selection of modules based on the rock type, and generating, using the acquired data and an interpolator from the modules, a wellbore image of the region of interest. The interpolator generates interpolated data between data points among the acquired data in the wellbore image. ... Schlumberger Technology Corporation
Reservoir fluid geodynamics system and method
A method includes placing a downhole acquisition tool in a wellbore in a geological formation within a hydrocarbon reservoir. The wellbore or the geological formation, or both, contain a reservoir fluid. ... Schlumberger Technology Corporation
Dart and sleeve mechanism for multiple zone actuation
A system for selectively actuating sliding valves includes a segmented sleeve exhibiting a rocking (or pivoting) function. The rocking allows the bottom end of the sleeve to open wider when the front of a dart is pressed against it, provided the length of the dart is shorter than a “target length” determined by the sleeve geometry. ... Schlumberger Technology Corporation
Method of making particles having a ridge portion for use as proppant
A method for forming particles having a ridge portion includes inducing flow of a slurry of particles and a reactant through one or more orifices, detaching an amount of the slurry from the slurry flow following exit from the one or more orifices, the detached amount forming a slurry body, forming the slurry body into a particle shape, contacting the particle shaped slurry body with a coagulation solution to form a stabilized particle having the ridge portion, and drying and/or sintering the particle having the ridge portion.. . ... Schlumberger Technology Corporation
Method and apparatus for characterizing inorganic scale formation conditions employing a microfludic device
A test method and apparatus employs a microfluidic device to characterize properties of a fluid. The microfluidic device has an inlet port, an outlet port, and a microchannel as part of a fluid path between the inlet port and the outlet port. ... Schlumberger Technology Corporation
Heterogeneous downhole acoustic network
An acoustic network is located in a formation traversed by a borehole having a pipe contained therein. The acoustic network includes a backbone network having a number of backbone modems engaging the pipe and acoustically communicating along the pipe using a first modulation technique. ... Schlumberger Technology Corporation
Scalable computation and communication methods for domain decomposition of large-scale numerical simulations
The present disclosure provides systems and methods for domain decomposition in parallel numerical computer modelling that remove the need for large-scale synchronization, decouple the regions within a simulation, and reduces wait times, increasing linear scalability and thus suitability for large-scale cloud deployment. Presently disclosed systems and methods include asynchronous message passing which decouples the computational units within the system and introduces an elasticity that allows wait time to be largely eliminated. ... Schlumberger Technology Corporation
Assignment of systems tracts
A method (1310) for attributing a systems tract to a geological environment, including computing (1314) a shelf break for a geologic environment based at least in part on implicit function values associated with the geologic environment; identifying (1318) sea level variations with respect to geological time for the shelf break; and assigning (1322) at least one systems tract to the geologic environment based at least in part on the sea level variations.. . ... Schlumberger Technology Corporation
Complex tool for well monitoring
The complex tool for well monitoring comprises a cylindrical housing and at least two lever centralizers aligning the tool along a well axis. Each centralizer has at least three levers, as well as at least one fluid flow temperature sensor, at least one phase composition sensor and at least one thermal flow velocity sensor, all sensors are located on an axis of the tool. ... Schlumberger Technology Corporation
Methods and apparatus to automatically control oil burning operations
Methods and apparatus to automatically control oil burning operations are disclosed. An example apparatus includes a first control valve to control a flow of a first fluid into a fluid mixture to be burned; and a second control valve to control a flow of a second fluid into the fluid mixture. ... Schlumberger Technology Corporation
Downhole configurable testing apparatus and methods
Apparatus and methods for performing downhole testing. Example apparatus include a downhole tool string for conveying within a wellbore, the downhole tool string comprising an anchor device, a testing device, and a linear or rotary actuator. ... Schlumberger Technology Corporation
Compliant module connections
Systems capable of compliantly coupling electrical assemblies located within drill string modules or drill collars to one another can include male and female mating portions, wire-carrying hollow tubes including helical portions thereof, a plurality of wires, and interconnection systems for interconnecting the plurality of wires. Related methods can include manufacturing the drill string modules and various components thereof, coupling the drill string modules to one another, and tripping the drill string modules into a wellbore.. ... Schlumberger Technology Corporation
Compositions and methods for well completions
Expansive cements for use in cementing subterranean wells comprise water, an inorganic cement and one or more particulate materials that swell upon contact with a water-immiscible fluid. The cements may further comprise a water-immiscible fluid. ... Schlumberger Technology Corporation
Method and apparatus of determining a state of a system
A method of determining a parameter and state of a system from a time series of a system measurement, comprising using a processor to: a) build an approximate model of the system; b) sample a plurality of approximate system parameters for a current time interval from a posterior probability distribution; c) determine an estimate of the system parameter at the current time interval from the distribution of the plurality of approximate system parameters; d) determine an estimate of the system state at the current time interval given the estimate of the system parameter; e) repeat b) to d) for the next time interval. An apparatus for performing the method is disclosed, and application of the method to drilling and wellbores is discussed.. ... Schlumberger Technology Corporation
Optimization of neutron-gamma tools for inelastic-gamma ray logging
Systems, methods, and devices for inelastic gamma-ray logging are provided. In one embodiment, such a method includes emitting neutrons into a subterranean formation from a downhole tool to produce inelastic gamma-rays, detecting a portion of the inelastic gamma-rays that scatter back to the downhole tool to obtain an inelastic gamma-ray signal, and determining a property of the subterranean formation based at least in part on the inelastic gamma-ray signal. ... Schlumberger Technology Corporation
Downhole interpretation techniques using borehole dips
Embodiments of the disclosure involve a method comprising a method comprising inputting borehole dip data; determining characteristics of a plurality of dips based on the borehole dip data; applying one or more geological models to the characteristics; and generating one or more geological cross-sections based on geological modeling.. . ... Schlumberger Technology Corporation
Integrated coupling of scintillation crystal with photomultiplier in a detector apparatus
A scintillator type radiation detector package is provided including a scintillation crystal directly coupled to the window of a photomultiplier. A scintillator package is also provided having a longer life at wellbore temperature with minimal deterioration of a hygroscopic scintillation crystal(s). ... Schlumberger Technology Corporation
Apparatus and methodology for measuring properties of microporous material at multiple scales
A method for characterizing properties of a sample that employs a test apparatus including an isolated sample cell and pressure sensor where the isolated sample cell is loaded with the sample and gaseous test fluid to perform a number of different tests to derive properties of the sample. The tests can be performed over different parameters, such as different applied pressures of the test fluid to derive parameters related to apparent gas permeability of the sample as a function of applied pressure, different gaseous test fluids to characterize dependence of permeability of the sample on mean free molecular path or pressure, with both adsorptive and non-adsorptive test gases to characterize at least one property related to adsorptive interaction between the adsorptive test gas and the sample, and with samples of varying saturation levels to derive a measure of at least one property of the subsamples at corresponding saturation levels.. ... Schlumberger Technology Corporation
Remote manifold valve and pump pairing technique for a multi-pump system
A technique for remote pairing of pumps and manifold valves at an oilfield. The technique takes advantage of a control unit having remote capability of opening and closing manifold valves. ... Schlumberger Technology Corporation
Well placement plan optimization
A well placement plan optimization (300) which considers existing wells and heterogeneity constraints in a consolidated manner, rather than relying on individual decisions where to place the next producer (p1-p4), injector i1), or recomplete an existing producer as injector. These individual decisions are combined in a whole field optimization process, in order to discover a plan that maximizes an objective function such as net present value or recovery.. ... Schlumberger Technology Corporation
Methods for interpreting nmr data
Methods for improved interpretation of nmr data acquired from industrial samples by simultaneously detecting more than one resonant nucleus without removing the sample from the sensitive volume of the nmr magnet or radio frequency probe are disclosed. In other aspects, the present disclosure provides methods for robust imaging/analysis of spatial distribution of different fluids (e.g., 1h, 23na, 19f) within a core or reservoir rock. ... Schlumberger Technology Corporation
Seismic constrained discrete fracture network
A method can include receiving values of an inversion based at least in part on seismic amplitude variation with azimuth (avaz) data for a region of a geologic environment; based at least in part on the received values, computing values that depend on components of a second-rank tensor αij, selecting a fracture height for fractures in the geologic environment; selecting an azimuth for a first fracture set of the fractures; based at least in part on the values for the second-rank tensor αij; the fracture height and the selected azimuth, determining an azimuth for a second fracture set of the fractures; and generating a discrete fracture network (dfn) for at least a portion of the region of the geologic environment where the discrete fracture network (dfn) includes fractures of the first fracture set and fractures of the second fracture set.. . ... Schlumberger Technology Corporation
Oil-based mud drill cutting cleaning for infrared spectroscopy
Oil-based mud cuttings are cleaned of drilling fluid and mud additives. After sorting and rinsing the cuttings with diesel, the cuttings are put in a syringe, which is repeatedly filled and emptied of diesel. ... Schlumberger Technology Corporation
Measurement and control of shock and vibration
A system for measuring and control of shock and vibration is disclosed. The system may include a bottomhole assembly having a downhole end and an uphole end opposite the downhole end. ... Schlumberger Technology Corporation
Compliant module connections
Systems capable of compliantly coupling electrical assemblies located within drill string modules or drill collars to one another can include male and female mating portions, wire-carrying hollow tubes including helical portions thereof, a plurality of wires, and interconnection systems for interconnecting the plurality of wires. Related methods can include manufacturing the drill string modules and various components thereof, coupling the drill string modules to one another, and tripping the drill string modules into a wellbore.. ... Schlumberger Technology Corporation
Measurement and processing to detect weak interfacial layers in hydrocarbon-bearing laminated formations with acoustic logging devices
Methods utilizing ultrasonic acoustic logging tools are provided for detecting thin formation layers that present markedly higher compliance than that of the surrounding rock in, for example, a laminated tight hydrocarbon-bearing formation. These layers may be interpreted as presenting potential interfacial and planes of weakness that may have bearing on the extent of a hydraulic fracture propagating across them.. ... Schlumberger Technology Corporation
Particle guard ring for mixed flow pump
A mixed-flow impeller for an electric submersible pump can include a lower end and an upper end; a hub that includes a through bore that defines an axis; blades that extend at least in part radially outward from the hub where each of the blades includes a leading edge and a trailing edge; an upper balance ring that includes a radially inward facing balance chamber surface and a radially outward facing diffuser clearance surface; and an upper guard ring disposed radially outwardly from the upper balance ring where the upper guard ring includes an axially facing diffuser clearance surface that is disposed axially between the trailing edges of the blades and the upper end.. . ... Schlumberger Technology Corporation
Efficient algorithms for volume visualization on irregular grids
A method for raycasting based on an irregular grid. The method includes raycasting, in a static mode, rays based on the irregular grid to generate a static image of a three dimensional (3d) volume dataset. ... Schlumberger Technology Corporation
Methods and systems for bounding box clipping
A method is described in which a polyhedral grid representative of seismic data is provided. A polyhedral cell of the polyhedral grid is identified. ... Schlumberger Technology Corporation
Downhole x-ray radiation detector systems and methods
A system for a downhole tool includes an x-ray generator that outputs x-ray radiation into a surrounding sub-surface formation using electrical power received from a power supply and a detector device adjacent the x-ray generator. The detector device includes a first detector with a first radiation sensitivity that outputs a first measurement signal based on interaction between a first portion of the x-ray radiation and the first detector. ... Schlumberger Technology Corporation
Systems and methods for monitoring radiation in well logging
A downhole tool includes a radiation generator configured to output radiation using electrical power received from a power supply. A first portion of the radiation is emitted into a surrounding sub-surface formation. ... Schlumberger Technology Corporation
A computer-implemented method and a system for processing acoustic signals
Acoustic signals sent by a logging tool disposed in a borehole are detected by receivers located on the logging tool. Time domain representations of the detected acoustic signals are converted into frequency domain representations. ... Schlumberger Technology Corporation
Methods and systems for juxtaposition across geological discontinuities
A method is described in which a seismic data set of a geological survey is provided. A geological discontinuity in the seismic data set is identified. ... Schlumberger Technology Corporation
Method for estimating a value of a kerogen property in subsurface formations
A method for estimating a value of a kerogen property in a subsurface formation where the value of the kerogen property is unknown. The method includes: measuring spectral intensity values over an infrared (ir) spectral range for a selected sample from the subsurface formation; determining a range of values representing the measured spectral intensity values corresponding to a vibrational mode attributable to kerogen in the selected sample, the range of values including values representing uncertainty in the measured spectral intensity over the portion of the spectral range; and inputting values from the range of values into a stochastic or simple regression model to determine an estimated value of the kerogen property in the selected sample.. ... Schlumberger Technology Corporation
Borehole trajectory via multi-component borehole seismic receiver
A method can include receiving an estimated spatial location of a three-component receiver in a borehole; receiving a plurality of spatial locations of sources of seismic energy; receiving incident angles for the three-component receiver at the estimated spatial location for the plurality of spatial locations of the sources of seismic energy; computing orientations for the three-component receiver based at least in part on the incident angles; minimizing an error function for the orientations; and, based at least in part on the minimizing, determining one or more deviation survey parameter values that specify at least a portion of a trajectory for the borehole.. . ... Schlumberger Technology Corporation
Emergency shutdown and disconnect of subsea tools using orientation
Initiating an emergency shutdown and disconnect (esd) sequence includes measuring an angle of the tubular member with respect to vertical using a sensor that is coupled to the tubular member. It may also be determined whether the angle exceeds a predetermined threshold for a predetermined amount of time. ... Schlumberger Technology Corporation
Wellsite equipment health monitoring
Methods and apparatus for detecting an equipment unit of a wellsite from a visible image, overlaying the detected equipment unit of the visible image on a corresponding portion of a thermal image, and generating an alert when a temperature indicated by the corresponding portion of the thermal image is outside of an operational temperature range of the detected equipment unit.. . ... Schlumberger Technology Corporation
Downhole toolstring spacer placement systems and methods
Techniques for improving implementation of a downhole tool string to be deployed in a borehole formed in a sub-surface formation. In some embodiments, a design device determines a model that describes expected relationship between properties of the downhole tool string, the borehole, the sub-surface formation, and mud cake expected to be formed in the borehole; determines calibration locations along the borehole based on properties of the borehole; determines candidate spacer configurations based on contact force expected to occur at contact points between the downhole tool string and the mud cake when deployed with each of the candidate spacer configuration via the model; and determines a final spacer configuration to be used to attach one or more spacers along the downhole tool string based on expected head tension to move the downhole tool string when deployed in the borehole with each of the candidate spacer configurations via the model.. ... Schlumberger Technology Corporation
Boron nitride nanotubes (bnnt) in polymers for extreme environment
A downhole tool includes a housing a measurement device disposed in the housing. The measurement device includes a sensor and electronic circuitry configured to detect or process signals detected by the sensor. ... Schlumberger Technology Corporation
Methods for seismic imaging
The present disclosure relates to target-enclosing extended image deconvolution. In a first aspect, the present disclosure provides methods to construct, from surface seismic reflection data, extended image gathers, i.e. ... Schlumberger Technology Corporation
Systems and methods for holding wireline device against well
A system includes a cable and a toolstring. The toolstring may couple to the cable to enable the toolstring to be placed in a wellbore. ... Schlumberger Technology Corporation
Rotary cutting tool
A downhole cutting tool which may be a reamer or a mill has a rotary tool body with at least one block which carries hard-faced cutters and projects or is extensible from the tool body. A radially outward facing part of the cutter block defines a channel for fluid flow which extends generally axially along the cutter block. ... Schlumberger Technology Corporation
Feature compensated borehole image coding
Image block transmission includes reading an image block from a downhole sensor. Based on the image block, a set of formation features attributes for the image block are detected. ... Schlumberger Technology Corporation
Electrical wellbore instrument swivel connector
An electrical instrument swivel connector has a first housing part and a second housing part rotatably connected to each other. The connection enabling transfer of axial loading between the housing parts. ... Schlumberger Technology Corporation
System and methodology for controlling optical transmittance
A technique facilitates control over optical transmittance and, in some applications, the technique may be carried out without using moving mechanical parts. A system may comprise a light source and an optical fiber line, e.g. ... Schlumberger Technology Corporation
Dual-use or position-sensitive helium-3 neutron detector by gas gain manipulation
A detector that detects properties of geological formation includes a first volume and a second volume each comprising helium-3 gas. The detector includes a gas electron multiplier having a mesh plate disposed between the first volume and the second volume. ... Schlumberger Technology Corporation
Inversion for tectonic stress
A method (710) can include receiving data for fractures associated with a geologic environment (712); performing stress inversion, based at least in part on a portion of the data and assignment of different mechanical fracture types to different populations of the fractures, to recover tectonic stress (716); and outputting the tectonic stress (720).. . ... Schlumberger Technology Corporation
Multiphase vortex flow meter
A multiphase flowmeter for detection of fluid flow by monitoring of vortex frequency or perturbation time of flight. The flowmeter includes a bluff body to facilitate formation of vortices during a consistent phase of a flowing fluid. ... Schlumberger Technology Corporation
Interpretation of pressure test data
Apparatus and methods for obtaining initial settings of station-specific parameters descriptive of wellbore/formation properties specific to downhole pressure test stations, and obtaining initial settings of station-shared parameters descriptive of petrophysical properties of petrophysically unique formation zones. A pressure transient model of the zones is obtained by regression utilizing the pressure data of each station and the initial settings of the station-specific and station-shared parameters. ... Schlumberger Technology Corporation
Formation pressure testing
A pressure testing module separable from and configured to be coupled with a tool base that is to be coupled along a downhole tool string to be conveyed within a wellbore extending into a subterranean formation. The pressure testing module includes a chamber and a piston assembly slidably disposed within the chamber, thus dividing the chamber into a first chamber portion and a second chamber portion. ... Schlumberger Technology Corporation
Downhole apparatus and technique to measure fluid resistivity
A method and apparatus are provided to measure fluid resistivity. The method includes driving a first winding at a first frequency to induce a first current in a fluid present in a flow line and then driving the first winding at a second frequency to induce a second current in the fluid present in the flow line. ... Schlumberger Technology Corporation
Method for determining an inflow profile in a multilayer well
A bottomhole temperature and a bottomhole pressure in a well are measured by means of sensors mounted on a perforation string below all perforation intervals. The measurements are made prior to perforating the well and after perforating the well until a temperature of a produced fluid returns to an initial reservoir temperature. ... Schlumberger Technology Corporation
Drillstring sticking management framework
A method includes receiving information during a drilling operation for a drillstring disposed in a bore in a formation; estimating uncertainty associated with the information; analyzing at least a portion of the information using a physics-based model to generate a result; computing, via a bayesian network, a risk probability of the drilling string sticking in the bore in the formation based at least in part on the result and the estimated uncertainty; and, based at least in part on the risk probability, issuing a signal.. . ... Schlumberger Technology Corporation
Relationship tagging of data in well construction
Processing systems and methods for receiving captured data of a data source attached with an expression of a relationship between the data source and a well construction system. The expression of the relationship between the data source and the well construction system is matched with an expression in a relationship descriptor including a description of a well construction system physical layout. ... Schlumberger Technology Corporation
Downhole tool power balancing
A system includes a downhole tool having a first load of a plurality of loads that receive power from a system power supply. The downhole tool includes a second load of the plurality of loads configured to receive power from the system power supply. ... Schlumberger Technology Corporation
Cathodically-protected plug assembly
A technique includes deploying a plug assembly including a degradable material inside a tubing string of a well; engaging the plug assembly with the tubing string to anchor the plug assembly to the tubing string; and preventing a cathodic reaction from degrading the degradable material. Preventing the cathodic reaction includes electrically isolating the engaged plug assembly from the tubing string. ... Schlumberger Technology Corporation
Determining residual statics of survey receivers
Observed data responsive to a seismic event in a target structure is received. Moment tensor inversion is applied on the observed data. ... Schlumberger Technology Corporation
Automated method and apparatus for measuring saturate, aromatic, resin, and asphaltene fractions using microfluidics and spectroscopy
A method of determining saturate, aromatic, resin, and asphaltene (sara) fractions of a hydrocarbon fluid sample, including: i) microfluidic mixing that forms a mixture including the hydrocarbon fluid sample and a solvent fluid that dissolves asphaltenes; ii) performing optical spectroscopy on the hydrocarbon fluid sample-solvent fluid mixture resulting from i); iii) microfluidic mixing that forms a mixture including the hydrocarbon fluid sample and a titrant fluid that precipitates asphaltenes; iv) microfluidically precipitating asphaltenes from the hydrocarbon fluid sample titrant fluid mixture resulting from iii); v) performing a microfluidic filtering operation that removes precipitated asphaltenes from the mixture resulting from iv) while outputting permeate; vi) performing optical spectroscopy on the permeate resulting from v); vii) determining an asphaltene fraction percentage of the hydrocarbon fluid sample based on the optical spectroscopy performed in ii) and vi); viii) sequentially separating saturate-, aromatic-, and resin-containing portions from the permeate from v); ix) for each separating of viii), measuring an optical property of the respective saturate-, aromatic-, and resin-containing portions over time; and x) determining fraction percentages of saturates, aromatics, and resins in the hydrocarbon fluid sample based on the measured optical properties of ix) and respective mass-to-optical correlation data.. . ... Schlumberger Technology Corporation
Oilfield reservoir saturation and permeability modeling
A system and method for correcting capillary pressure curves includes creating a capillary pressure curve using multiple linked hyperbolic tangents, determining a closure correction pressure cutoff of the capillary pressure curve, and correcting the capillary pressure curve. The correction may include normalizing the capillary pressure curve and extrapolating the capillary pressure curve.. ... Schlumberger Technology Corporation
Conduit mapping tool and method
An apparatus, system, and method for mapping a conduit wall, of which the apparatus includes a shaft defining a central longitudinal axis, and a sensor module coupled to the shaft and including an emitter configured to emit a light beam directed at least partially radially with respect to the central longitudinal axis, and a sensor configured to detect a reflected portion of the light beam, such that the sensor module is configured to measure a distance between the conduit wall and sensor module. The apparatus also includes a centralizer coupled to the shaft and configured to position the sensor module at a center of the conduit.. ... Schlumberger Technology Corporation
Active alternator control in a downhole tool string
A downhole system includes a drill string having a drilling fluid flow channel and at least one turbine alternator deployed in the flow channel. The turbine alternator is configured to convert flowing drilling fluid to electrical power. ... Schlumberger Technology Corporation
System and methodology for electronic cartridge insertion and/or extraction
A technique facilitates the insertion and/or extraction of an electronics cartridge with respect to a corresponding cartridge housing which may be used in a downhole tool, such as a logging tool. An insertion tool comprises a frame to which the cartridge housing may be coupled to enable insertion of a corresponding electronics cartridge. ... Schlumberger Technology Corporation
Well treatment
Methods of treating formation damage or other service induced damage in a near wellbore region of a wellbore of a subterranean formation, by treating a zone or zones in the near wellbore region, and diverting treatment fluid stages from the treated zones to untreated zone(s) with an acid precursor material and optionally also with fibers. The acid precursor material has an average particle size less than 1000 microns.. ... Schlumberger Technology Corporation
Pump rod connection
A pump rod can include a body that includes a longitudinal axis; and a pin at an end of the body where the pin includes threads where the threads include tangential elliptical roots.. . ... Schlumberger Technology Corporation
Drilling traction system and method
A traction system for connecting and/or disconnecting pipe during well drilling is disclosed. The traction system of the present disclosure is installed above a rotating control device or blowout preventer and may be used with a continuous circulation device. ... Schlumberger Technology Corporation
Water control agent for oilfield application
Methods for treating subterranean wells involve treating fluids that contain water and a plurality of water dispersible nanoparticles. The nanoparticles may be nanocellulose, rod-like nanoparticles, nanotubes or halloysite or combinations thereof. ... Schlumberger Technology Corporation
Methods for treating a subterranean well
Compositions and methods by which well control may be maintained during well construction, workover or well-intervention operations in a subterranean well without damaging formation are disclosed. A treatment fluid that comprises a carrier fluid, as well as degradable particles, or degradable fibers, or combination thereof is provided or prepared. ... Schlumberger Technology Corporation
Downhole equipment using flexible circuits
Downhole equipment circuitry, comprising: a first substrate member including one or more circuits; a second substrate member including one or more circuits; and a flexible circuit, wherein: the first and second substrate members are separate substrate members; the flexible circuit is of a laminated construction; and the flexible circuit provides electrical communication between the one or more circuits of the first substrate member and the one or more circuits for the second substrate member.. . ... Schlumberger Technology Corporation
Method for prediction of live oil interfacial tension at reservoir conditions from dead oil measurements
Methods may include measuring an interfacial tension (ift) for a dead oil sample prepared from a fluid within an interval of a formation; calculating a gas:oil ratio for the fluid within the interval of a formation at a specified temperature and pressure; calculating a live oil density for the fluid within the interval of a formation for the specified temperature and pressure; and converting the ift for the dead oil sample to a corrected ift measurement for a live oil within the interval of the formation from the calculated gas:oil ratio and the calculated density. Methods may also include constructing a depletion path for the dead oil sample from one or more isobars and one or more isotherms; and converting the ift for the dead oil sample to a corrected ift measurement from the calculated gas:oil ratio and the calculated live oil density for a live oil.. ... Schlumberger Technology Corporation
Method for analyzing cement integrity in cased wells using sonic logging
Methods are provided for identifying a cementation status of a multi-string cased wellbore utilizing sonic tools with monopole and/or dipole transmitters and with an array of sonic receivers axially displaced from the transmitter(s). The sonic tool is used to record waveforms. ... Schlumberger Technology Corporation
Co2 concentration measurement in dry gas mixtures
Described herein is an apparatus and methods for characterizing a fluid composition including exposing electrolyte to one fluid mixture, collecting a signal from an electrode in contact with the electrolyte, and simultaneously exposing the electrolyte to a second fluid, collecting a signal from a second electrode in contact with the electrolyte exposed to the second fluid, and comparing the signal difference between the electrodes with the nerst equation wherein the temperature of the electrolyte is above 488° c. Carbon dioxide, nitrogen, and/or oxygen may be present in the fluid and/or the second fluid.. ... Schlumberger Technology Corporation
Fluid relationship tracking to support model dependencies
A method, apparatus, and program product manage model dependencies in a petroleum simulation environment. Version data is maintained both for a model or data set used by a first simulation application and for a dependent model used by a second simulation application and based upon the model or data set used by the first simulation application. ... Schlumberger Technology Corporation
Low pressure fluid storage technique for a high pressure application
A technique for pre-storing an application fluid in coiled tubing for use in a downhole application. The technique includes filling the coiled tubing with the application fluid in a manner that utilizes pressures substantially below that of the pressures utilized in the downhole application itself. ... Schlumberger Technology Corporation
Systems and methods for reducing bit damage in a landing tool
A landing tool includes a body with an inner surface. A receiving groove is located on the inner surface and includes a first groove portion and a second groove portion separated by a tab. ... Schlumberger Technology Corporation
Well construction site communications network
Apparatus including, and methods of operating a communications network having a common data bus communicatively coupled to control devices, non-control devices, and network appliances. The control devices control corresponding equipment components of a well construction system. ... Schlumberger Technology Corporation
Nmr well logging instrument and method with synthetic apertures
An apparatus for measuring nuclear magnetic resonance (nmr) properties of subsurface formations includes a magnet for pre-polarizing nuclear spins in the formations. A plurality of transmitter antennas is spaced apart along a length of the apparatus. ... Schlumberger Technology Corporation
Metering fluid to a fluid actuator
Apparatus and methods for metering fluid to a fluid actuator. An example apparatus may include a hydraulic actuator and a fluid chamber. ... Schlumberger Technology Corporation
Metering fluid to fluid actuators
Apparatus and methods for metering fluid to a fluid actuator. An example apparatus may include a hydraulic actuator, a fluid chamber, and a hydraulic directional control valve. ... Schlumberger Technology Corporation
Method for analyzing cement integrity in casing strings using machine learning
The present disclosure provides methods and systems for analyzing cement integrity in a depth interval of a wellbore having a multiple string casing with an innermost annulus disposed inside at least one outer annulus. The method includes processing ultrasonic data obtained from ultrasonic measurements on the interval of the wellbore to determine properties of the innermost annulus. ... Schlumberger Technology Corporation
Well construction communication and control
Methods and apparatus for use in well construction, including a communications network having processing systems and a common data bus. At least one processing system implements subsystem virtual networks in the communications network. ... Schlumberger Technology Corporation
Well cementing compositions and methods
Cement slurry compositions comprising water, an inorganic cement and additive comprising nanocrystalline cellulose, microcrystalline cellulose, cellulose fibrils, or bacterial nanocellulose or combinations thereof have reduced fluid loss values. Such compositions may be prepared and placed in subterranean wells. ... Schlumberger Technology Corporation
Removal of acquisition effects from marine seismic data
Marine seismic data can be processed to remove or reduce two or more source side acquisition effects jointly when 1) the effects are placed in the same data domain as the received data and 2) the effects are described using the same basis functions which may signify representing the received data and the effects in the same chosen transform domain. The data effects may include source signature removal, source radiation pattern removal, residual shot noise suppression and data regularization, multi-channel reconstruction or regularization, prediction of sea surface multiples, separation of simultaneous sources etc. ... Schlumberger Technology Corporation
Multiphase flow meters and related methods
Multiphase flow meters and related methods are disclosed herein. An example apparatus includes an inlet manifold; an outlet manifold, first and second flow paths coupled between the inlet and outlet manifolds; and an analyzer to determine a flow rate of fluid flowing through the first and second flow paths based on a parameter of the fluid flowing through the first flow path.. ... Schlumberger Technology Corporation
Method for analyzing cement quality in multi-string cased wells using sonic logging
Methods and systems are provided for determining cement quality in an outer annulus of a multi-string cased wellbore having an inner annulus of mud. Data from a sonic logging tool is processed to obtain a slowness dispersion. ... Schlumberger Technology Corporation
Methods of evaluating cement isolations and quality
A method may include preparing a map of cement quality for one or more intervals of a wellbore; determining anticipated regions of fluid communication and anticipated regions of zonal isolation from the map of cement quality; and designing a stimulating treatment based on the presence of regions of fluid communication.. . ... Schlumberger Technology Corporation
Directional drilling steering actuators
A rotary steerable drilling system having a series of actuators disposed with a drilling tool, the series of actuators arranged in close proximity and independently operable to distribute a total steering force applied to a wellbore wall across the series of actuators. The series of actuators are extendable to different distances, such that the radial extension length of the actuators increases between actuators.. ... Schlumberger Technology Corporation
Downhole cables and methods of making the same
. . A downhole cable that has a cable core with an inner jacket located about it. The inner jacket has a shell located thereabout, and a pair of strength member layers surrounds the inner shell. ... Schlumberger Technology Corporation
Inversion-based workflow for processing nuclear density images in high-angle and horizontal wells
Methods and apparatus for characterizing a subterranean formation traversed by a wellbore including collecting data from the formation using a tool wherein the tool collects data to form an azimuthal image, characterizing a section of the formation comprising data and images acquired in a high angle wellbore section or horizontal wellbore section using a parametric model, and performing an inversion using apparent densities and volumetric photoelectric factor images to build a formation model wherein the inversion is tailored for high angle wellbore sections and/or horizontal wellbore sections.. . ... Schlumberger Technology Corporation
Turbines and methods of generating electricity
A turbine includes a rotor. The rotor is connected to at least one blade. ... Schlumberger Technology Corporation
System and method for mitigating a mud motor stall
A system and method for operating a mud motor in a wellbore. The method includes running the mud motor into the wellbore. ... Schlumberger Technology Corporation
Drillable latching plug
A latching dog includes a dog body, at least one engagement arm protrudes from an outer radial surface of the dog body in a transverse direction, and at least one retention fin protrudes from the dog body in a longitudinal direction. The at least one retention fin maintains the latching dog engaged with a housing surface to keep the latching dog at a desired axial and/or rotational position while milling the housing and latching dog.. ... Schlumberger Technology Corporation
Fluid loss and gain for flow, managed pressure and underbalanced drilling
A method for monitoring a well bore during drilling operations, particularly with respect to a fluid gain and/or fluid loss event. Monitoring the well bore may be accomplished by monitoring an incoming flow rate of the fluid into the wellbore. ... Schlumberger Technology Corporation
High trip rate drilling rig
A drilling rig system for obtaining high trip rates separates the transport of tubular stands in and out of their setback position into a first function, delivery and retrieval of tubular stands in well center position as a second function; and the functions intersect at a stand hand-off position where tubular stands are set down for exchange between tubular handling equipment. A drilling rig has a tubular delivery arm that vertically translates the mast in a non-conflicting path with a top drive. ... Schlumberger Technology Corporation
Selective seal stem anchor
A seal stem anchor assembly of the present disclosure includes: a tubular portion having body lock threads disposed about an external portion; and an anchor assembly including an activation module about the tubular portion and proximate the body lock threads, a cone, one or more anchor slips extending between the activation module and the cone, and a helical spring positioned and biased so as to push the activation module away from the cone.. . ... Schlumberger Technology Corporation
Corrosion inhibition
Corrosion of steel in acidic solution is inhibited using a mixture of a compound in which a plurality of heterocyclic aromatic groups with a quaternary nitrogen atom are connected together, such as by a linking group which may be covalently attached to the quaternary nitrogen atoms of the aromatic heterocyclic rings, and a polarizable adsorption-intensifying anion.. . ... Schlumberger Technology Corporation
Methods for treating high temperature subterranean formations
Methods are described for treating a subterranean formation penetrated by a wellbore. The methods include injecting a treatment fluid into the wellbore. ... Schlumberger Technology Corporation
Multi-material functional parts using additive manufacturing
A method of forming a component includes depositing successive layers of a binder and first particles of a first material using a layering device to build a first green segment, depositing successive layers of the binder and second particles of a second material different than the first material using the layering device to build a second green segment, assembling the first green segment and the second green segment together to form a green component, and infiltrating the green component with a metallic infiltrant to form the component.. . ... Schlumberger Technology Corporation
3d-printed seals and connectors for electric submersible pumps
An electrical connector assembly for electric submersible pumps (esps) has a fluid impenetrable seal 3d-printed between the power cable and an internal housing component of the electrical connector assembly. Electrical insulation or dielectric for a conductor of the power cable may also be 3d-printed integrally with the fluid seal. ... Schlumberger Technology Corporation
Em-telemetry remote sensing wireless network and methods of using the same
Em-telemetry remote sensing wireless systems include a plurality of downhole tools in a drilling area, an array of electrodes at the earth's surface, a noise reduction manager, and an acquisition system. Each downhole tool transmits a modulated current into the formation to generate an electromagnetic signal at the earth's surface. ... Schlumberger Technology Corporation
Method and apparatus for drill string control
A method and apparatus for controlling a drilling system by: implementing a network of level 1 direct control processing systems and level 2 coordinated control processing systems, wherein the level 1 direct control and level 2 coordinated control processing systems are communicatively coupled to each other; operating the level 2 coordinated control processing systems to: receive uphole drill string property measurements from sensors associated with the drill string near the driver, execute a control algorithm based on the received drill string property measurements to generation an actuator command, and transmit the actuator command to the level 1 direct control processing systems; and operating the level 1 direct control processing systems to control the driver based on the actuator command.. . ... Schlumberger Technology Corporation
Flow routing modules for downhole formation testing tools
A system includes a downhole acquisition tool housing that may receive a fluid that enters the downhole acquisition tool from a first flowline, a second flowline, or both, and a flow control device removably coupled to the downhole acquisition tool and having a housing, a plurality of flow routing plugs that may be in fluid communication to the first flowline, the second flowline, or both, and channels disposed within the housing and fluidly coupled to the plurality of flow routing plugs.. . ... Schlumberger Technology Corporation
Steering pads with shaped front faces
A rotary steerable device includes a steering pad disposed with a drilling tool and radially moveable relative to a centerline of the drilling tool to apply a steering force to a borehole wall. The steering pad has a front face to contact the borehole wall and having a diameter or width and a tapered section that tapers inward at a taper angle toward the centerline along a taper length in the direction from a take-off position to a leading edge relative to one of a rotational direction of the drilling tool or a drilling direction.. ... Schlumberger Technology Corporation
Fracturing fluids containing hydrophilic fibers
A fracturing fluid may include an aqueous base fluid; a proppant material; and hydrophilic fibers having a length of about 250 microns to 10 millimeters. A method of performing a fracturing operation may include injecting a fracturing fluid comprising hydrophilic fibers having a length of about 250 microns to 10 millimeters and proppant into a wellbore.. ... Schlumberger Technology Corporation
Compositions and methods of using degradable and nondegradable particulates for effective proppant placement
Methods herein include treating a formation including pumping a fracturing fluid including proppant, non-degradable fibers, and a degradable component into fractures in the formation. Fracturing fluids herein include an aqueous base fluid, a proppant materials, non-degradable fibers, and a degradable component. ... Schlumberger Technology Corporation
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