Patents by Inventor Adrian Marica

Adrian Marica has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220018385
    Abstract: Pump assemblies, pumping systems including said pump assemblies, and related methods are disclosed. In an embodiment, the pump assembly includes a frame, a fluid end, and a power end coupled to the frame and the fluid end. In addition, the pump assembly includes a plurality of connectors coupled between the fluid end and the frame. Each of the connectors include an axis, a first connector member, and a second connector member. The first connector member is configured to actuate relative to the second connector member to adjust a total axial length of the connector along the axis.
    Type: Application
    Filed: October 2, 2019
    Publication date: January 20, 2022
    Applicant: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 11131308
    Abstract: A pump includes a driving shaft having a central axis, two retention members disposed on the driving shaft, a rotor disposed on the driving shaft between the two retention members, a bushing disposed on the driving shaft between the two retention members, a diffuser disposed about the driving shaft and adjacent the rotor such that the rotor is rotatably disposed within the diffuser, and an axial biasing member. The axial biasing member is disposed on the shaft and axially pre-loaded to compress the axial biasing member, the rotor, and the bushing between the two retention members and impart a tension in the driving shaft.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: September 28, 2021
    Assignee: National Oilwell Vareo, L.P.
    Inventors: Adrian Marica, Tim Burns, Homer Hilburn
  • 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: 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: 20200166026
    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: Application
    Filed: January 11, 2017
    Publication date: May 28, 2020
    Applicant: National Oilwell Varco, L.P.
    Inventor: Adrian MARICA
  • Publication number: 20200072201
    Abstract: Pump assemblies and pumping systems incorporating the pump assemblies are disclosed. In an embodiment, the pump assembly includes 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.
    Type: Application
    Filed: September 17, 2018
    Publication date: March 5, 2020
    Applicant: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 10514106
    Abstract: A valve assembly for operation within a valve body of a pump includes an axial centerline, a poppet guide having a stem, and a poppet slidingly coupled to the poppet guide so that the poppet and the poppet guide define an internal cavity. The valve assembly also includes a flexible poppet guide mounting system coupled to the poppet guide and the poppet and includes a variable-area flow restrictor in fluid communication with the internal cavity. The flexible poppet guide mounting system is configured to support the poppet guide and the poppet for lateral and axial movement of the poppet guide and the poppet relative to the axial centerline. The poppet is movable relative to the poppet guide to adjust the volume of the internal cavity.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: December 24, 2019
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Publication number: 20190257312
    Abstract: A pump includes a driving shaft having a central axis, two retention members disposed on the driving shaft, a rotor disposed on the driving shaft between the two retention members, a bushing disposed on the driving shaft between the two retention members, a diffuser disposed about the driving shaft and adjacent the rotor such that the rotor is rotatably disposed within the diffuser, and an axial biasing member. The axial biasing member is disposed on the shaft and axially pre-loaded to compress the axial biasing member, the rotor, and the bushing between the two retention members and impart a tension in the driving shaft.
    Type: Application
    Filed: June 6, 2017
    Publication date: August 22, 2019
    Applicant: National Oilwell Varco, L.P.
    Inventors: Adrian MARICA, Tim BURNS, Homer HILBURN
  • Patent number: 10094366
    Abstract: An illustrative valve is disclosed that includes a valve body, a valve seat disposed within the valve body that has a first curved sealing surface and a valve member having a second curved sealing surface that is adapted to sealingly engage the first curved sealing surface, wherein the first and second curved sealing surfaces are opposed curved sealing surfaces.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: October 9, 2018
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 9903480
    Abstract: A poppet valve with an integrated dampener is disclosed. In some embodiments, the valve includes a poppet guide with a stem and a hollow poppet is disclosed. The hollow poppet receives the poppet guide stem therein, thereby defining an internal cavity. The poppet is movable relative to the poppet guide to adjust the volume of the internal cavity. The poppet is also moveable relative to a valve seat between a seated position and an unseated position. The poppet may include a body with a seal groove and an elastic seal disposed within the seal groove. The seal is configured to engage the valve seat prior to the poppet body when the poppet moves toward the seated position. The valve may include a poppet guide pivot system that enables pivoting of the poppet guide and the poppet relative to an axial centerline of the valve.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: February 27, 2018
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 9546648
    Abstract: A drilling fluid pumping system including a pump apparatus with a pumping chamber having an inlet valve and an outlet valve and a dampener system in fluid communication with the pumping chamber for damping the flow of fluid, e.g. drilling fluid, This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: January 17, 2017
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 9464494
    Abstract: A track guiding system includes a first track segment having a first end and a second end, the first track segment including a first linear beam segment operatively coupled to a first linear plate segment. The track guiding system further includes and a second track segment having a first end and a second end, the second track segment including a second linear beam segment operatively coupled to a second linear plate segment, wherein the first end of the first track segment is adapted to be operatively coupled to the second end of the second track segment, a first end of the first linear beam segment proximate the first end of the first track segment being adapted to overlap a second end of the second linear plate segment proximate the second end of said second track segment when the second track segment is operatively coupled to the first track segment.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: October 11, 2016
    Assignee: National Oilwell Varco, L.P.
    Inventors: Adrian Marica, Ionescu Mihai
  • Patent number: 9366248
    Abstract: A system for pressurizing a working fluid including a cylinder having an outlet through which the working fluid is exhausted at a discharge pressure and a plunger translatably disposed within the cylinder, the plunger including a first piston coupled thereto. In addition, the system includes a second piston disposed opposite the first piston, the second piston driven to reciprocate and a variable-volume chamber disposed between the first piston and the second piston, the variable-volume chamber substantially filled with a volume of hydraulic fluid. Further, the system includes a hydraulic system configured to adjust the volume of hydraulic fluid within the variable-volume chamber, whereby the discharge pressure is maintained substantially at a first predetermined level. Still further, the system includes a transducer coupled to each of the first piston and the second piston, wherein the transducer is configured to measure a relative position of the first piston and the second piston.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: June 14, 2016
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventor: Adrian Marica
  • Patent number: 9328729
    Abstract: A drilling fluid pumping system including a pump apparatus with a pumping chamber having an inlet valve and an outlet valve and a dampener system in fluid communication with the pumping chamber for damping the flow of fluid, e.g. drilling fluid, This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C. F. R. 1.72(b).
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: May 3, 2016
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 9121397
    Abstract: A pressure pulsation dampening system for a pump that pressurizes a working fluid. In some embodiments, the dampening system includes a hydraulic cylinder, a valve, and a controller. The hydraulic cylinder has a piston that is movably disposed within a housing and divides the housing into a working fluid chamber and a hydraulic fluid chamber. An outlet of the pump is in fluid communication with the working fluid chamber, and the valve is in fluid communication with the hydraulic fluid chamber. The controller is operable to actuate the valve to a first configuration, wherein pressurized hydraulic fluid is supplied to the hydraulic fluid chamber, and to a second configuration, wherein hydraulic fluid is exhausted from the hydraulic fluid chamber. The piston is movable under fluid pressure, whereby working fluid is relieved from the outlet to the working fluid chamber or supplied to the outlet from the working fluid chamber.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: September 1, 2015
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventor: Adrian Marica
  • Patent number: 9074421
    Abstract: A top drive guide system comprising first and second rail sections axially aligned to form a top drive guide rail. A locking member is coupled to the first rail section and is movable between a locked position and an unlocked position. A locking surface is disposed on the second rail section and is operable to engage the locking member when the locking member is in the locked position. An actuator is coupled to the locking member and is operable to move the locking member from the locked position to the unlocked position.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: July 7, 2015
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Adrian Marica, Mihai Ionescu
  • Patent number: 9073116
    Abstract: A method for manufacturing a metal reinforced open cell carbon foam component comprises (a) placing a block of open cell carbon foam in a mold. The block comprise a plurality of interconnected pores distributed throughout the block. In addition, the method comprises (b) pouring a molten metal into the mold. Further, the method comprises (c) infiltrating the interconnected pores in the block during (b). Still further, the method comprises (d) allowing the molten metal to cool after (c) to form a metal reinforced open cell carbon foam casting.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: July 7, 2015
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Adrian Marica, Kenneth S. Kondo
  • Patent number: 8978705
    Abstract: A system for conveying fluid includes a conduit segment and a pump disposed downstream of and fluidicly coupled to the conduit segment. The conduit segment has an interior volume for conveying the fluid in a predetermined direction of flow and a plurality of elongate vanes disposed within the interior volume.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: March 17, 2015
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Publication number: 20140312257
    Abstract: A valve assembly for operation within a valve body of a pump includes an axial centerline, a poppet guide having a stem, and a poppet slidingly coupled to the poppet guide so that the poppet and the poppet guide define an internal cavity. The valve assembly also includes a flexible poppet guide mounting system coupled to the poppet guide and the poppet and includes a variable-area flow restrictor in fluid communication with the internal cavity. The flexible poppet guide mounting system is configured to support the poppet guide and the poppet for lateral and axial movement of the poppet guide and the poppet relative to the axial centerline. The poppet is movable relative to the poppet guide to adjust the volume of the internal cavity.
    Type: Application
    Filed: April 17, 2014
    Publication date: October 23, 2014
    Applicant: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Publication number: 20140261790
    Abstract: A poppet valve with an integrated dampener is disclosed. In some embodiments, the valve includes a poppet guide with a stem and a hollow poppet is disclosed. The hollow poppet receives the poppet guide stem therein, thereby defining an internal cavity. The poppet is movable relative to the poppet guide to adjust the volume of the internal cavity. The poppet is also moveable relative to a valve seat between a seated position and an unseated position. The poppet may include a body with a seal groove and an elastic seal disposed within the seal groove. The seal is configured to engage the valve seat prior to the poppet body when the poppet moves toward the seated position. The valve may include a poppet guide pivot system that enables pivoting of the poppet guide and the poppet relative to an axial centerline of the valve.
    Type: Application
    Filed: March 24, 2014
    Publication date: September 18, 2014
    Applicant: National Oilwell Varco, L.P.
    Inventor: Adrian Marica