Patents Assigned to National-Oilwell Varco, L.P.
  • Patent number: 11187053
    Abstract: A casing hanger assembly includes a landing ring secured to a containment well cellar or the conductor pipe. A casing hanger welded to the external surface of the last section of surface casing seats into the landing ring.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: November 30, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventor: James A. Rose
  • Patent number: 11174685
    Abstract: A tubular member includes a tube body, a tube end, an exterior surface, an interior surface, a nominal wall thickness, a longitudinal axis, a welded seam, and a patch of material. The welded seam forms an arcuate portion of the interior surface, and the patch covers a portion of the interior surface that includes a portion of the welded seam, extending from the tube end to an axially spaced first location. The resulting interior surface from the tube end to the axially spaced first location has a uniform inside diameter.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: November 16, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventors: Roger Edward Ethridge, Christopher E. Desadier
  • Patent number: 11161151
    Abstract: A screen assembly for vibratory separation includes a screen having a plurality of raised screen components formed therein, with each of the raised screen components defining a face oriented to oppose a flow direction of the screen assembly. In examples, a screen of the screen assembly is assembled from a plurality of metal cloth layers bonded together. Bonding of the metal cloth layers may be accomplished by a sintering process.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: November 2, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventor: Eric Landon Scott
  • Patent number: 11142439
    Abstract: A snubbing jack including a jack assembly including a base plate, a traveling plate, an axis extending through the base plate and the traveling plate, and a plurality of piston-cylinder assemblies, a rotary drive including a rotary base and a hub, wherein the rotary drive is configured to rotate the hub relative to the rotary base, a clamp coupled to the rotary base and configured to grip a first tubular member, a power tongs coupled to the rotary base and configured to grip a second tubular member and to rotate the second tubular relative to the rotary base, and a torque transfer device coupled between the rotary drive and the jack assembly and configured to allow the rotary drive to move axially relative to the base plate and configured to restrict rotation of the rotary drive relative to the jack assembly.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: October 12, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventors: William Benjamin White, Timothy S. Steffenhagen, Kraig W. Huse
  • Patent number: 11136826
    Abstract: A system for drilling a subterranean borehole. In an embodiment, the system includes a mast, and a pipe rotator coupled to the mast. The pipe rotator includes a stem that is configured to be coupled to an end of a drillstring and a motor that is configured to rotate the stem. In addition, the system includes a guide beam coupled to the mast. The guide beam includes a longitudinal axis and is configured to guide vertical motion of the pipe rotator. The guide beam includes a plurality of elongate sections configured to be generally aligned along the longitudinal axis. In addition, the guide beam includes a plurality of coupling assemblies configured to interconnect the plurality of elongate sections and align the plurality elongate sections along the longitudinal axis.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 5, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventors: Christopher Brian Walker, Henry Do, Robert Ioan Papp, Mihail Puscas, Calvin Ronald Blankenship, Delfino Moreno, III, James Cirone
  • Publication number: 20210301619
    Abstract: A blowout preventer including a housing including a central passage and a first aperture, and a first ram assembly slidably disposed in the first aperture, wherein the first ram assembly includes a ram block and an actuator configured to rotate the ram block when the ram block is disposed in the first aperture of the housing.
    Type: Application
    Filed: July 31, 2019
    Publication date: September 30, 2021
    Applicant: National Oilwell Varco, L.P.
    Inventors: Randall Ferrain Weaver, Clifton Dee Eggleston
  • Patent number: 11105322
    Abstract: Disclosed are embodiments of a pumping system with connectable and disconnectable pumping assemblies coupled to suction and discharge manifolds. In an embodiment, the pumping system includes a pulsation dampening assembly including a variable volume chamber fluidly coupled to the discharge manifold. In addition, the pumping system includes a controller coupled to the pumping assemblies. The controller is configured to detect a pressure pulsation based on a measurement from at least one of the pressure sensors, and is configured to adjust the rotational speed of the driver of at least one of the pump assemblies. In addition, the controller is configured to adjust a volume of the variable volume chamber of the pulsation dampening assembly based at least in part on the measurement from the at least one of the pressure sensors.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: August 31, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 11092145
    Abstract: A valve retainer assembly and pump including the same. In an embodiment, the valve retainer assembly includes a retainer configured to engage with a suction valve assembly and retain the suction valve assembly within a chamber of a fluid section of a reciprocating pump. The retainer includes a pair of engagement arms extending along a single arm axis, and a connecting member including a coupling aperture. In addition, the valve retainer assembly includes a keeper that further includes a keeper axis, and a connecting shaft. The connecting shaft of the keeper is received within the coupling aperture such that the keeper axis extends in a direction that is perpendicular to the arm axis.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: August 17, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventors: Justin Wade Erwin, Christopher Eugene Robinson, Daniel Alan Senechal
  • Publication number: 20210207450
    Abstract: An annular elastomeric packer for a blowout preventer includes a plurality of circumferentially spaced inserts, wherein at least one of the plurality of inserts includes a rib, and a foot pivotally coupled to the rib, and an elastomeric body coupled to the plurality of inserts and including an inner surface, wherein the foot is configured to resist deformation of the elastomeric body in response to the blowout preventer actuating from a first position to a second position.
    Type: Application
    Filed: May 29, 2019
    Publication date: July 8, 2021
    Applicant: National Oilwell Varco, L.P.
    Inventors: Lydia Mireles, Cesar J. Gonzalez, David E. Hill, Nathan Follett, Vaishali Bhuvela, Ali Al-Quraishi
  • Patent number: 11047180
    Abstract: A hole cleaning joint for a drill string is deployed into a wellbore penetrating a subterranean formation. The hole cleaning joint includes a tubular body connectable to the drill string and a hole cleaning section positionable about the tubular body. The hole cleaning section has an outer surface engageable with a wall of the well bore. The outer surface has spiral grooves extending therein defining blades therebetween, and an uphole end and a downhole end with a spiral cavity therebetween. The spiral cavity has a width that decreases towards the uphole end of the spiral cavity to define a tapered flow channel to receive cuttings therethrough whereby uphole movement of cuttings is facilitated during drilling.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: June 29, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventors: Michael Joseph Jellison, Guillaume Plessis, Andrei Muradov, John Forester Price, Stephen C. Hain
  • Patent number: 11047196
    Abstract: A method includes cutting a production tubing disposed in a wellbore to form a lower production tubing section and an upper production tubing section, displacing the upper production tubing section away from the lower production tubing section, installing a production tubing conversion device within the upper production tubing section, and injecting a sealant into the wellbore through the upper production tubing section, through the production tubing conversion device, and through the bottom hole assembly. The production tubing conversion device is coupled to a bottom hole assembly disposed below the production tubing conversion device.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: June 29, 2021
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventor: Michael Rossing
  • Patent number: 11035415
    Abstract: A driveshaft assembly includes a driveshaft including a longitudinal shaft axis, a first end, a second end, and a radially outer surface. The first end includes a plurality of recesses extending radially inward from the radially outer surface. The recesses each include a convex engagement surface. The driveshaft assembly also includes a first end housing including a longitudinal housing axis and an axially extending receptacle. The receptacle includes a plurality of planar receptacle surfaces. In addition, the driveshaft assembly includes a plurality of torque transfer keys configured to transfer torque between the driveshaft and first end housing. Each of the torque transfer keys includes a planar key surface and a concave key surface. The convex engagement surface of each recess engages the concave key surface of one of the torque transfer keys. The planar key surface of each torque transfer key engages one of the planar receptacle surfaces.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: June 15, 2021
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Nicholas Ryan Marchand, Masoud Kalantari
  • Patent number: 11035183
    Abstract: Systems and methods for clearing a top drive from an operational area of the mast such that operations may be performed along the rail without interference from the top drive. Systems and methods of the present disclosure provide for arranging the top drive in a parked configuration outside of, or generally behind, the mast. A guide rail may be arranged within an operational area of a mast and may have a pair of interchangeable rail sections, each of which may be configured for arrangement in either an operating configuration, where the rail section may be positioned within the operational area of the mast to form part of the rail, or a parked configuration, where the rail section may be positioned outside of the operational area. Each interchangeable rail section may be pivotable about an axis and may be arranged on a pivotable gate of the mast.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: June 15, 2021
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Robert Benjamin Donnally, Xi Lin Liu, Jay John Thiessen
  • Patent number: 11035348
    Abstract: A pump assembly including a power end including an output shaft having an output shaft axis. In addition, the pump assembly includes a fluid end including a piston configured to reciprocate to pressurize the working fluid. Further, the pump assembly includes a transmission coupled to each of the power end and the fluid end. The transmission includes a carriage coupled to the piston and a pivoting arm pivotably coupled to the carriage at a first connection about a first pivot axis. The first pivot axis extends in a perpendicular direction to a direction of the output shaft axis, and rotation of the output shaft about the output shaft axis is configured to cause the pivoting arm to pivot about the first pivot axis at the first connection and to cause the carriage to reciprocate.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: June 15, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Publication number: 20210172261
    Abstract: A tubular member includes a tube body, a tube end, an exterior surface, an interior surface, a nominal wall thickness, a longitudinal axis, a welded seam, and a patch of material. The welded seam forms an arcuate portion of the interior surface, and the patch covers a portion of the interior surface that includes a portion of the welded seam, extending from the tube end to an axially spaced first location. The resulting interior surface from the tube end to the axially spaced first location has a uniform inside diameter.
    Type: Application
    Filed: February 18, 2021
    Publication date: June 10, 2021
    Applicant: National Oilwell Varco, L.P.
    Inventors: Roger Edward Ethridge, Christopher E. Desadier
  • Publication number: 20210131268
    Abstract: A method includes receiving a drill bit design. The design specifies a design parameter for a plurality of cutter elements of a drill bit. The method also includes estimating a temperature value for the cutter elements based on the design parameter and a drilling parameter; estimating a wear value for the cutter elements based on the design parameter and the temperature value; updating a value of the design parameter for at least one of the cutter elements based on the wear value and a time period; and using the updated design parameter value, repeating the steps of estimating the temperature value, estimating the wear value, and updating the design parameter value until the design parameter value for the at least one of the cutter elements reaches a threshold value.
    Type: Application
    Filed: October 30, 2020
    Publication date: May 6, 2021
    Applicant: National Oilwell Varco, L.P.
    Inventors: Reza Rahmani, Afshin Babaie Aghdam
  • Patent number: 10995564
    Abstract: A system for handling tubulars on a rig may include a top handling device configured for arrangement on the rig and for handling a top portion of a tubular to and from a setback area. The system may also include a lower handling device configured for arrangement on the rig and for handling a bottom portion of the tubular between well center and a release position. The system may also include a bottom handling device configured for arrangement on the rig and for handling the bottom portion of the tubular between the release position and the setback area.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: May 4, 2021
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Travis James Miller, Frank Benjamin Springett
  • Patent number: 10975634
    Abstract: The present disclosure relates to novel and advantageous devices, systems, and methods for stabilizing a coiled tubing guide extending from a coiled tubing unit. Stabilization of the guide may mitigate movement of the guide from lateral operational forces. The guide may be stabilized by clamping or anchoring a connection point between the guide and the unit, such as between the guide and a coiled tubing injector frame or a tubing guide mount coupled to the coiled tubing injector frame. In general, a clamp or other mechanism may operate to preload the pinned connection with a prescribed force. The direction of the force may be perpendicular, or near perpendicular, to an axis of rotation about which lateral loading on the guide causes moment forces.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: April 13, 2021
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Marcus Joseph Doran, Timothy Scott Steffenhagen, Antonio Ruiz, Kevin Edwin AuBuchon
  • Patent number: 10961780
    Abstract: A mast erection system includes a first mast erection apparatus that is adapted to pivotably raise a drilling rig mast of a drilling rig assembly to an intermediate raised position wherein the drilling rig mast is oriented at a first acute angle relative to a horizontal plane, and a second mast erection apparatus that is adapted to further pivotably raise the drilling rig mast from the intermediate raised position at the first acute angle to a fully raised position wherein the drilling rig mast is oriented at a second angle relative to the horizontal plane that is greater than the first acute angle.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: March 30, 2021
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Fuquan Chen, Robert Benjamin Donnally, Hua Jiang
  • Patent number: 10961787
    Abstract: A tubular member includes a tube body, a tube end, an exterior surface, an interior surface, a nominal wall thickness, a longitudinal axis, a welded seam, and a patch of material. The welded seam forms an arcuate portion of the interior surface, and the patch covers a portion of the interior surface that includes a portion of the welded seam, extending from the tube end to an axially spaced first location. The resulting interior surface from the tube end to the axially spaced first location has a uniform inside diameter.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: March 30, 2021
    Assignee: National Oilwell Varco, L.P.
    Inventors: Roger Edward Ethridge, Christopher E. Desadier