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National Oilwell Dht L p patents


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

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


 new patent  Wellsite sensor assembly and using same

Some embodiments include a sensor assembly comprising a sensor to be carried by a movable component movably positionable about a tool body of a downhole tool. The sensor is to take wellsite measurements and the downhole tool is positionable in a wellbore. The sensor assembly further includes electronics positionable in... National Oilwell Dht L p

Cutter elements for drill bits and methods for fabricating same

A method of fabricating a PCD cutter element including a diamond table including a plurality of coated diamond particles fabricated using an atomic layer deposition (ALD) process.... National Oilwell Dht L p

Apparatus and methods for activating a downhole percussion tool

A percussion tool includes an actuating piston and a pump. The pump includes: a cam ring, a valve plate, a piston housing, and a piston. The cam ring includes an aperture having a camming surface. The valve plate faces the cam ring and includes a fluid port extending therethrough. The... National Oilwell Dht L p

Wellsite sensor assembly and using same

A sensor assembly for a downhole tool including a tool body and a movable component movably positionable about the tool body is disclosed. The sensor assembly may include a wear sensor and/or a position sensor. The wear sensor may include a core with conductors at various depths to send a... National Oilwell Dht L p

Anti-balling drill bit and making same

A drill bit for drilling a wellbore penetrating a subterranean formation is disclosed. The drill bit includes a bit body having a surface about a working end thereof, ribs extending from the surface of the bit body with channels defined therebetween, cutting elements positionable on the ribs to cuttingly engage... National Oilwell Dht L p

Method of pressure testing a wellbore

A method comprises measuring a first external pressure within an annulus formed between a wellbore and a drill string disposed therein, where the first external pressure is measured by a first external pressure sensor. A fluid is pumped through the drill string into the annulus so as to move any... National Oilwell Dht L p

Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto

Drill bits and methods relating thereto are disclosed. In an embodiment, the drill bit includes a body having a plurality of legs each having a lower section that has a leading surface and a trailing surface. A plurality of cone cutters are each rotatably mounted to the lower section of... National Oilwell Dht L p

Wellsite hardfacing with distributed hard phase and using same

A hardfacing disposable on a surface of a component, such as a wellsite component, is disclosed. The hardfacing comprises a surface portion and a bottom portion with a segregation line defined therebetween. The surface portion and the bottom portion each include a matrix phase including a matrix composition made of... National Oilwell Dht L p

Fixed cutter drill bit with flow guide

A drill bit comprises a bit body having a body face. A plurality of fixed blades extends from the bit body. Each of the plurality of fixed blades has a leading face and a trailing face. A plurality of nozzles is disposed on the body face to flow drilling fluid... National Oilwell Dht L p

Downhole drill bit cutting element with chamfered ridge

A cutting element for a drill bit is advanceable into a subterranean formation to form a wellbore. The cutting element includes an element body having a face at an end thereof, and a ridge. The element body has a face at an end thereof. The face has a ramp and... National Oilwell Dht L p








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