Houston, TX, United States
Houston, TX, United States

National Oilwell Varco is an American multinational corporation based in Greater Sharpstown, Houston, Texas. It is a leading worldwide provider of equipment and components used in oil and gas drilling and production operations, oilfield services, and supply chain integration services to the upstream oil and gas industry. The company conducts operations in more than 1,200 locations across six continents.The Company's common stock is traded on the New York Stock Exchange under the symbol "NOV". The company operates through four reporting segments that were reorganized in 2014: Rig Systems, Rig Aftermarket, Completion and Production Solutions, and Wellbore Technologies.Products include all the heavy hardware for oil well drilling as well as drilling instrumentation and controls and drilling power generation and control. A partial list of heavy hardware includes topdrives, rotarys, drawworks, derricks, BOPs , mud pumps, riser equipment, and complete drilling rigs. Products also include instruments and controls required on the rig floor for the drilling operation. This includes sophisticated electronics for precise control, such as the control system Cyberbase. NOV also produces control electronics for power generation and control of drilling motors and motor control centers for AC motor control.In 2008, the Houston Chronicle ranked National Oilwell Varco as the best company in Greater Houston. In 2007, the newspaper ranked National Oilwell Varco number 15.NOV is the Houston area's largest energy employer, with more than 14,500 workers in the region, according to Houston Business Journal research. Wikipedia.


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The present invention relates to an offshore pipe system comprising a first unbonded flexible pipe and a second unbonded flexible pipe for transportation of fluids such as oil or gas. Each of the unbonded flexible pipes comprises a sealing sheath and an electrically conductive armor layer, and, moreover, the system comprises a first end fitting connected to the first end of the first unbonded flexible pipe and a second end fitting connected to the first end of the second unbonded flexible pipe. In the offshore pipe system the electrically conductive armor layer of the first unbonded flexible pipe is electrically connected with the electrically conductive armor layer of the second unbonded flexible pipe via a first electrical connection and a second electrical connection. To obtain an electrical circuit the the first and second electrical connections are applied with a distance along the length of the first unbonded flexible pipe and the second unbonded flexible pipe, respectively. The invention also relates to a method for heating pipes by forming an electrical circuit between the pipes.


Patent
National Oilwell Varco | Date: 2017-02-08

An instrumented shell for sensing drilling parameters of a drilling assembly positionable at a wellsite is provided. The drilling assembly includes a top drive assembly and a downhole tool. The instrumented shell includes a shell body, instruments and an interconnector. The shell body is positionable about the top drive assembly, and has pockets extending therein and a cover positionable about the shell body. The instruments include sensors, and are removably disposable in the pocket and sealable therein with the at least one cover. The interconnector includes a top drive connector removably connectable to the top drive assembly and a shell connector removably connectable to the shell body with a cable therebetween to pass signals therebetween whereby drilling parameters of the downhole tool may be directly collected.


Patent
National Oilwell Varco | Date: 2017-02-08

A coring assembly (10) comprises an outer barrel (14) coupled to a coring bit (16). An inner barrel (20) is disposed within the outer barrel. An inner sleeve (22) is disposed within the inner barrel and includes at least one frangible region (26) that allows the inner sleeve to break so that coring operations can continue after the occurrence of a core jam.


Patent
National Oilwell Varco | Date: 2017-03-15

The present disclosure relates to a monitor for a blowout preventer of a wellbore. The blowout preventer includes a housing, rams, and an actuator comprising a cylinder with a piston. The piston is operatively connectable with the ram and movable therewith. The monitor includes a monitor base operatively connectable to the cylinder (the monitor base having an interior side inside the cylinder and an exterior side outside the cylinder), an interior plate positionable inside the cylinder about the interior side of the base (the interior plate operatively connectable to the piston and movable therewith), an exterior plate positionable outside the cylinder about the exterior surface of the monitor base (the exterior plate coupled by magnets to the interior plate and rotatable therewith), and a trigger sensor operatively connectable about the monitor base and the exterior plate to detect rotation thereof whereby a position of the ram may be determined.


Patent
National Oilwell Varco | Date: 2017-02-01

A coupling assembly comprising a coupling (217), a protective ring (201) and two tubulars (209,210), the coupling (217) of generally cylindrical shape with a channel therethrough, the coupling (217) having at least one internal thread (221,22la, 302) and two coupling ends and a pin end (213,214) of at least one of the two tubulars (209,210) having an external thread (220,220a) for threaded mating therewith so that the coupling assembly provides a connection between the two tubulars (209,210), the protective ring (201) comprising a ring body (202) for positioning adjacent an interior wall of the coupling between the two ends thereof, the ring body (202) being generally cylindrical and having a ring channel therethrough, the protective ring (201) comprises one of a tongue (203,204) and groove (205,206) and at least one of the ends of at least one of the two tubulars (209,210) having the other of a tongue (203,204) and groove (205,206).


Patent
National Oilwell Varco | Date: 2017-03-15

A flexible metal tube having a length and a longitudinal axis and suitable for forming a carcass of a flexible pipe for transport of hydrocarbons, the metallic tube comprises a plurality of consecutive windings of at least one elongate strip structure (2) comprising a bearing structure and at least one cover flange (9). The cover flange (9) is intended to cover the gaps (5) which appear when the elongate strip (2) is wound to form the flexible metal tube. When a fluid is flowing in the tube, open gaps may cause formation of vortexes in the flow which in most case is undesired.


In at least one aspect, this disclosure relates to a wellsite pump for a wellsite having a wellbore penetrating a subterranean formation. The wellsite has a conduit to pass a wellsite fluid about the wellsite. The wellsite pump includes a housing having an intake and an outtake, at least one hydraulic motor to pump the wellsite fluid from the intake and through the outtake, at least one driver coupled to the hydraulic motor and movable therewith, and a power source. The intake is in fluid communication with the conduit, and the outtake is positioned a distance upstream of the intake. The hydraulic motor includes a rotor and a stator. The power source drives the driver and the hydraulic motor coupled thereto whereby the wellsite fluid is advance from the conduit to a location upstream therefrom.


Patent
National Oilwell Varco | Date: 2017-03-22

A system (300) includes a drilling mud cooling apparatus (340) that is adapted to receive a flow of a mixture of drilling materials (390h) from a drilled wellbore (301) during a drilling operation, and to cool the mixture (390h) from a first temperature to a second temperature, wherein the cooled mixture of drilling materials (390c) includes cooled drilling mud (310c) and drill cuttings (307). The disclosed system (300) further includes a shale shaker apparatus (306) that is adapted to receive a flow of the cooled mixture of drilling materials (390c) from the drilling mud cooling apparatus (340) and to separate at least a portion of the drill cuttings (307) from the cooled drilling mud (310c).


Patent
National Oilwell Varco | Date: 2017-01-25

The invention concerns a flexible pipe for offshore applications, such as for use as a riser in oil production. The flexible pipe has a longitudinal axis and comprises a pressure resilient core pipe structure with an inner surface defining a bore, and at least a pair of cross wound and non-bonded tensile armor layers surrounding said core pipe structure. The pressure resilient core pipe structure comprises an embedded pressure armor structure, wherein the embedded pressure armor structure comprises a plurality of layers of helically wound continuous fibers, wound with a winding angle of about 60 degrees or more relative to the longitudinal axis of the pipe and embedded in a cured polymer matrix. The fibers are individually bonded to the cured polymer matrix. Preferably each of said layers of helically wound continuous fibers have a fiber density of at least about 40 %.


Patent
National Oilwell Varco | Date: 2017-06-21

A method of measuring drilling fluid properties that includes pumping drilling fluid into a feed chamber (135) of a capillary rheometer (134), said feed chamber (135) comprising a cavity (135a, 135b) and a double wall (136) defining an annulus (140) that opens to said cavity (135a, 135b) and controlling a delivery rate of said drilling fluid into said feed chamber (135) during said pumping such that a first strain rate is imparted to said drilling fluid flowing through said capillary rheometer (134). The method further includes draining said drilling fluid from said cavity (135a, 135b) through at least one drain port (144) of said feed chamber (135) and into an inlet of a capillary tube (146) coupled to said at least one drain port (144), determining a flow rate and a pressure drop of said drilling fluid flowing through said capillary tube (146) for said first strain rate, and determining a viscosity of said drilling fluid from said flow rate and said pressure drop.

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