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National Oilwell Varco L p
National Oilwell Varco L p_20131212

National Oilwell Varco L p patents


Recent patent applications related to National Oilwell Varco L p. National Oilwell Varco L p is listed as an Agent/Assignee. Note: National Oilwell Varco L p may have other listings under different names/spellings. We're not affiliated with National Oilwell Varco L p, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "N" | National Oilwell Varco L p-related inventors


A detection system for a wellsite and using same

A detection system and method for a well site is provided. The well site has a surface rig and a surface unit. The surface rig is positioned about a formation and a surface unit. The detection system includes a well site component deployable from the surface rig via a conveyance,... National Oilwell Varco L p

Apparatus, system, and separating oil from a fluid mixture

A system and method for extracting oil from a fluid mixture includes a separation vessel having an internal chamber that extends to a chamber elevation, an inlet port, a water outlet port, and an oil outlet port. A liquid storage tank has an inlet port, an upper outlet port located... National Oilwell Varco L p

Apparatus and separating solids from a solids laden drilling fluid

An apparatus for separating solids from solids laden drilling fluid is provided. The apparatus includes a shale shaker and a screen assembly. The shale shaker includes a base and a basket isolated from the base, a flow tray arranged in the basket for directing screened drilling fluid. The screen assembly... National Oilwell Varco L p

Sbop swarf wiper

A wiper (200a) for a blowout preventer having an adapter ring (102a) and a piston (104a) slideable relative to the adapter ring along an interface can include a base (202) adapted to couple the wiper to the adapter ring and a head (204) coupled to the base. The head can... National Oilwell Varco L p

Systems and methods to control directional drilling for hydrocarbon wells

Embodiments of systems and methods to control directional drilling in borehole drilling for hydrocarbon wells are disclosed. An actual toolface orientation measurement value and an actual downhole torque on bit (DTOB) or actual downhole weight on bit (DWOB) measurement value for a drill string positioned in a borehole are determined.... National Oilwell Varco L p

Active waterway stabilizer

A downhole tool comprises a plurality of blades that extend outward from a tool body. Each blade has an under-gauge surface with a blade diameter that is less than a gauge diameter of a drill bit to be used with the downhole tool. A waterway is defined between a pair... National Oilwell Varco L p

Guyless rig with outriggers

The present disclosure, in one or more embodiments, relates to a well servicing rig having a mast having a racking board, a base supporting the mast, and a stabilization system configured to secure the rig against wind loading. The stabilization system may include a pair of front outriggers, a pair... National Oilwell Varco L p

Washpipe assemblies for a power swivel

A washpipe assembly for a power swivel and a power swivel incorporating the washpipe assembly. In an embodiment, the washpipe assembly includes a washpipe including a central axis and a radially outermost cylindrical surface. In addition, the washpipe assembly includes a first packing assembly configured to be coupled to a... National Oilwell Varco L p

Torque calibrating system

A torque calibrating system that includes a power tong, a load cell assembly, and a torque arm having first and second ends, wherein the first end is adapted to impose a load on the load cell assembly when the power tong is actuated to impose a torque on the second... National Oilwell Varco L p

Electrochemical corrosion of catalyst material from pcd elements

A method of treating a cutter element comprises contacting at least a portion of a volume of polycrystalline diamond with an electrolyte solution, applying an electrical current between the volume of the polycrystalline diamond and a counter electrode to maintain a predetermined electrochemical potential between a reference electrode and the... National Oilwell Varco L p

Multistage stacked disc choke

A multistage stacked disk choke includes a housing having a high pressure inlet port and a low pressure outlet port, an assembly, a cage, a seat, and a plug. The assembly includes: a tubular inlet port, a galley intersecting the tubular inlet port, a tubular outlet port, and a bore... National Oilwell Varco L p

Pipe coupling system and method

A tubular coupling system and method; the system and method in at least certain aspects, using a coupling member with an interior protective ring that has at least one inner energizing member which, upon compression, forces the body of the coupling member against an interior wall of the coupling thereby... National Oilwell Varco L p

Method and the recovery of drilling fluid from shaker tailings during active drilling

A system and method for recovering drilling fluid from shaker tailings includes a hopper and a cover that is pivotable between a first position in which the hopper is uncovered and a second position in which the hopper is covered. In the first position, the hopper receives the tailings, which... National Oilwell Varco L p

Multi-well bop cellar trailer

A drilling rig having a detachable, modular cellar arranged beneath a drill floor of the drilling rig. The cellar may be or include a cellar trailer and may be configured to house drilling equipment, such as well head equipment, such as one or more blowout preventers. In some embodiments, the... National Oilwell Varco L p

Drilling rig with self-elevating drill floor

The present disclosure, in one or more embodiments, relates to a drilling rig with a self-elevating drill floor. The drilling rig may have one or more jacking systems that may operate to raise the drill floor. The one or more jacking systems may raise the drill floor to a height... National Oilwell Varco L p

Wellsite hardfacing with particle distribution and using same

A chromium-free, distributed hardfacing disposable on a surface of a wellsite component is disclosed. The hardfacing includes a metal filler (e.g., nickel) and particles distributed about the filler. The particles include pellets made of tungsten carbide and pieces made of angular molybdenum carbide. The pieces are smaller than the pellets... National Oilwell Varco L p

Vector maximizing screen

A screen panel assembly includes a screen panel and a raised screen component disposed thereon. The raised screen component includes an inclined screen surface that defines a first plane oriented at a first angle relative to the screen panel and a wedge surface positioned at a back side of the... National Oilwell Varco L p

Stuffing box and packing rings for use therein

A packing ring is disclosed for sealingly engaging a movable rod member within a stuffing box having an internal cavity. In an embodiment, the packing ring includes a carrier and a sealing ring mounted to the carrier. The sealing ring is configured to sealingly engage with an outer surface of... National Oilwell Varco L p

Well site pump with integrated driver and hydraulic motor and using same

In at least one aspect, this disclosure relates to a wellsite pump for a well site having a wellbore penetrating a subterranean formation. The well site has a conduit to pass a wellsite fluid about the wellsite. The wellsite pump includes a housing having an intake and an outtake, at... National Oilwell Varco L p

Universal driveshaft assembly

A driveshaft assembly includes a driveshaft with a shaft axis, a first end, and a radially outer surface. The first end includes a plurality of recesses extending radially inward from the radially outer surface and each including an engagement surface. The driveshaft assembly also includes an end housing with a... National Oilwell Varco L p

Methods for operating wellbore drilling equipment based on wellbore conditions

A method, comprising acquiring annular pressure data from a wellbore where the annular pressure data is acquired over a time interval and at least a portion of the annular pressure data is acquired during a pumps-off period. At least first and second values are identified from the annular pressure data... National Oilwell Varco L p

Coupling assembly and protective ring therefor

A coupling assembly includes a coupling, a protective ring and two tubulars, the coupling of generally cylindrical shape with a channel therethrough, the coupling having at least one internal thread and two coupling ends and a pin end of at least one of the two tubulars having an external thread... National Oilwell Varco L p

System and detecting material loss in a tubular

A method and system for detecting material loss in a tubular. A method includes identifying a radial cross-sectional area of a tubular as having a loss of material in a wall of the tubular. Responsive to the identifying, an amount of voltage offset present in each of a plurality of... National Oilwell Varco L p

Method and reducing stick-slip

A method and apparatus for damping stick-slip oscillations in a drill string. In one embodiment a method includes damping the stick-slip oscillations using a drilling mechanism at the top of said drill string. The speed of rotation of the drilling mechanism is controlled using a PI controller. The control is... National Oilwell Varco L p

Mechanism and system for rotating an elongate member of an oil pump

A rotator mechanism for rotating an elongate member that is coupled to a reciprocating member of a pumping system includes: a body having a through-hole for receiving a portion of the elongate member; a first freewheel clutch configured to cause the elongate member to rotate incrementally about the body axis... National Oilwell Varco L p








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