On Sucker Or Pump Rod Patents (Class 166/241.2)
  • Patent number: 9765577
    Abstract: A method of fabricating a centralizer for a tubular body in a wellbore is provided herein. The method includes providing a centralizer, wherein the centralizer include an elongated body having an inner surface and an outer surface, and wherein the inner surface defines a bore there through. The bore is dimensioned to slidingly receive a tubular body. The method also includes applying a first low-coefficient of friction treatment to the inner surface and the outer surface using a ferritic nitro-carburizing process. The method further includes depositing a second low-coefficient of friction treatment onto at least the inner surface. The coatings are designed to provide a reduced coefficient of friction on the surfaces.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: September 19, 2017
    Inventor: Rock Dicke
  • Patent number: 9303466
    Abstract: A coupling assembly is disclosed for connecting and centralizing a first threaded-end member and a second threaded-end member, the coupling assembly comprising: a mandrel having a rotor receiving surface bounded by a first stop and a second stop, the mandrel having a first threaded pin at a first end for connection to a first threaded box coupling for the first threaded-end member, and a second threaded pin at a second end for connection to a second threaded box coupling for the second threaded-end member; each of the first stop and the second stop having respective outer diameters and the respective outer diameters being less than or equal to the respective outer diameters of the first threaded box coupling and the second respective box coupling; and a rotor with raised fins mounted on the rotor receiving surface between the first stop and the second stop.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: April 5, 2016
    Assignee: Plainsman Mfg. Inc.
    Inventors: Leroy A. Makelki, Mark A. Lea-Wilson, Damon B. Larson
  • Patent number: 9045949
    Abstract: A tool which connects the last sucker rod of a sucker rod string to a downhole pump has a circularly cylindrical cylinder and piston so that the piston slides reciprocally and rotates freely within the cylinder. However, the closed upper end of the cylinder and the upper face of the piston have a cooperable tongue and groove which prevent relative rotational motion of the piston in the cylinder when the tongue is engaged in the groove so that the tool can be disconnected from the pump in response to rotation of the string at the uppermost stroke of the plunger to engage and turn the tongue and groove.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: June 2, 2015
    Inventor: Jerry W. Dobbs
  • Patent number: 9033058
    Abstract: A stator for a progressive cavity pump comprises a stator housing having a central axis, a first end, and a second end opposite the first end. In addition, the stator comprises a stator liner disposed within the stator housing. The stator liner has a first end and a second end opposite the first end. The first end of the stator liner is axially spaced from the first end of the stator housing. Further, the stator comprises a tag insert positioned in the stator housing between the first end of the stator housing and the first end of the stator liner. The tag insert has a through passage defining a radially inner surface that includes a tag shoulder.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: May 19, 2015
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Tariq Ahmed, Denis J. Blaquiere
  • Patent number: 8967247
    Abstract: A multi-tasking downhole rod guide for centralizing a downhole pump rod production tubing within production tubing, while simultaneously reducing abrasion and deterioration of the production tubing and engendering auxiliary pump-boosting functions. The rod guide is configured with an elongate helix having a continuous trough-like channel through which hydrocarbons flow upwardly under high pressure. As the pressurized hydrocarbons flow through a succession of plates at each equidistant helical level, the elongate helix rotates synchronously with the upwardly flowing hydrocarbons within the production tubing string.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: March 3, 2015
    Inventor: Douglas Ray Dickinson
  • Patent number: 8662186
    Abstract: A backspin retarder for a progressive cavity pump deploys on the drive string uphole from a pump unit. The backspin retarder has a shaft that connects to portions of the drive string. An impeller disposes on the shaft and can move axially and radially. In an unengaged condition, the impeller and shaft can rotate relative to one another so the drive string can rotate in a drive direction without impediment from the impeller. In an engaged condition, the impeller rotates with the shaft in a backspin direction. In this way, vanes on the impeller can retard the backspin of the shaft and drive string by attempting to force the lifted fluid column flowing downhole past the impeller back uphole. The retarder can use a pin and slot arrangement or an arrangement of engageable teeth to engage the impeller to the rotation of the shaft.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: March 4, 2014
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Jorge Robles
  • Patent number: 8631864
    Abstract: An apparatus for downhole operation. The apparatus comprising a support body having a surface located in a borehole and a coating on an at least a portion of the surface of the support body. The coating is an inert material selected for reducing friction and corrosion.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: January 21, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Richard Saenger, Jean Desroches, Natalia Quisel
  • Publication number: 20120186807
    Abstract: A multi-tasking downhole rod guide for centralizing a downhole pump rod production tubing within production tubing, while simultaneously reducing abrasion and deterioration of the production tubing and engendering auxiliary pump-boosting functions—with minimal energy consumption. The rod guide is configured with an elongate helix having a continuous trough-like channel through hydrocarbons flow upwardly under high pressure. As the pressurized hydrocarbons flow through a succession of plates at each equidistant helical level, the elongate helix rotates synchronously with the upwardly flowing hydrocarbons within the production tubing string. A multi-tasking downhole rod guide for centralizing downhole production tubing within a well casing, while simultaneously reducing abrasion and deterioration of the tubing and engendering auxiliary pump-boosting functions—with minimal energy consumption.
    Type: Application
    Filed: April 2, 2012
    Publication date: July 26, 2012
    Inventor: Douglas Ray Dickinson
  • Publication number: 20120186818
    Abstract: A sucker rod coupling features a coupler unit having internally threaded coupling sections at opposite ends for engaging sucker rod pins and one or two outer members extending about the coupler unit between the ends, each outer member being rotatable about the coupler unit and presenting contact surfaces facing outwardly at positions radially outward therefrom. Each outer member is positioned between a respective end of the coupler and a stop defining feature thereof, and a respective stop element is selectively deployable adjacent the respective end of the coupler on a side of the outer member opposite the stop-defining feature. The outer member prevents wear to the production tubing and the sucker rod string, is easily replaceable through manipulation of the stop element to allow sliding of the member off the unit and sliding of a new member thereon, and directly engages the sucker rods without needing additional threaded components.
    Type: Application
    Filed: July 5, 2010
    Publication date: July 26, 2012
    Inventor: Arnold Wollmann
  • Publication number: 20120080184
    Abstract: The apparatus for evaluating a wellbore while drilling includes a logging toolheld on a drill string and is adapted to obtain data from the wellbore while moving the drill string including the logging tool uphole and out of the wellbore. The logging tool includes a memory for storing obtained data and an on-board power supply battery. A computer being positioned at a surface level of the wellbore is adapted to obtain the data from the memory when the logging tool is also positioned at the surface level. The logging tool is adapted to perform a minimum power-consuming sleep mode with a data obtaining and storing function being disabled and the computer is adapted to transmit a wake-up signal downhole to enable the data obtaining and storing function of the logging tool just prior to tripping out the drill string from the wellbore. The wake-up signal preferably is a mud pulse signal sent through the drilling fluid used when drilling the wellbore.
    Type: Application
    Filed: April 2, 2009
    Publication date: April 5, 2012
    Applicant: STATOIL ASA
    Inventors: Mohammad Jahangir, Tore Weltzin
  • Patent number: 8096352
    Abstract: A centralizer for tubular elements is provided which includes an inner part formed by a first material having high mechanical performance and chemical stability and an outer part arranged on said inner part, formed by a second material. The second material may be an autolubricating material. The second material may further possess a low coefficient of friction. The second material may additionally possess lower mechanical performance and chemical stability than the first material. A method of manufacturing the centralizer is also provided, including steps of injecting the first material on a tubular element to form the inner part on the tubular element and injecting the second material to form the outer part on the formed inner part.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: January 17, 2012
    Assignee: Siderca S.A.I.C.
    Inventors: Hugo Ernst, Guillermo Dapino, Matias Pereyra
  • Patent number: 7918274
    Abstract: There is disclosed an improved tool, e.g. adapted to comprise at least part of a well completion assembly or well drilling assembly. The invention provides an improved downhole tool (or device) having a friction factor of the order of ten times less than those known from the prior art, e.g. of the order of 0.100 or less. Accordingly the invention provides a downhole tool (10; 10a; 10b; 10c; 10d), at least part of the downhole tool or device being made from Tungsten Disulphide (Tungsten Disulfide). In a disclosed embodiment the at least part comprises at least one surface of the downhole tool, the at least one surface comprising a bearing surface, e.g. a journal bearing surface and/or a thrust bearing surface.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: April 5, 2011
    Inventor: Thomas John Oliver Thornton
  • Patent number: 7854259
    Abstract: A rod guide is provided for use in a rotating rod string (12) for powering a progressive cavity pump (14) for pumping downhole fluids through tubing (16) to the surface. The rod guide includes a rotor sleeve (20) secured to the rod string. The rotor sleeve includes a plurality of axially spaced reduced diameter body portions 22, and a plurality of axially spaced enlarged diameter ridge portions 24. Upper and lower stop surfaces 26, 28 on the ridge portions permit axial movement of the stator sleeve with respect to the rotor sleeve. A stator sleeve (40) positioned over the rotor sleeve, and has a sleeve body (42) with a generally circular configuration with opposing circumferential ends (44, 46) spreadable to position the stator sleeve about the rotor sleeve. A plurality of ribs (48) extend outward from the stator sleeve body.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: December 21, 2010
    Assignee: Robbins & Myers Energy Systems L.P.
    Inventor: Matthew S. Davison
  • Patent number: 7793717
    Abstract: A rod guide is provided for use in a rotating rod string (12) for powering a progressive cavity pump (14) for pumping downhole fluids through tubing (16) to the surface. The rod guide includes a rotor sleeve (20) secured to the rod string and having a plurality of circumferentially spaced exterior surfaces (22) each positioned substantially along an exterior of a cylinder. The rotor sleeve also includes one or more stop surfaces (24) for limiting axial movement of a stator sleeve (40) with respect to the rotor sleeve, and two or more axially extending cavities (26) each extending from a bottommost surface to an opposing uppermost surface of the rotor sleeve and passing through the one or more stop surfaces. Stator sleeve (40) surrounds the rotor sleeve and has an interior surface (42) for engaging the plurality of circumferentially spaced exterior surfaces of the rotor sleeve, and a plurality of ribs (44) extending outward from two or more outer cylindrical surface portions (44) of the stator sleeve.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: September 14, 2010
    Assignee: Robbins & Myers Energy Systems L.P.
    Inventor: Matthew S. Davison
  • Patent number: 7658225
    Abstract: A polish rod clamp apparatus has a body defining a lower rod aperture and a tapered body recess. A cap defines an upper rod aperture and a tapered cap recess. Tapered gripper dies have upper and lower outer surfaces sloping inward from a central portion and inner surfaces configured to bear against the polish rod. The dies are installed in the body recess such that inner surfaces bear against a polish rod and the lower outer surfaces bear against walls of the body recess. The dies are movable with respect to the body and are prevented from rotating. The cap is threaded onto the body such that the upper outer surfaces of the gripper dies bear against the walls of the tapered cap recess. Threading the cap onto the body forces the gripper dies against the outer surface of the polish rod passing through the body.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: February 9, 2010
    Assignee: 1075878 Alberta Ltd.
    Inventor: Glen Joki
  • Publication number: 20090166036
    Abstract: A rod guide is provided for use in a rotating rod string (12) for powering a progressive cavity pump (14) for pumping downhole fluids through tubing (16) to the surface. The rod guide includes a rotor sleeve (20) secured to the rod string and having a plurality of circumferentially spaced exterior surfaces (22) each positioned substantially along an exterior of a cylinder. The rotor sleeve also includes one or more stop surfaces (24) for limiting axial movement of a stator sleeve (40) with respect to the rotor sleeve, and two or more axially extending cavities (26) each extending from a bottommost surface to an opposing uppermost surface of the rotor sleeve and passing through the one or more stop surfaces. Stator sleeve (40) surrounds the rotor sleeve and has an interior surface (42) for engaging the plurality of circumferentially spaced exterior surfaces of the rotor sleeve, and a plurality of ribs (44) extending outward from two or more outer cylindrical surface portions (44) of the stator sleeve.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 2, 2009
    Inventor: Matthew S. Davison
  • Patent number: 7255165
    Abstract: A field-installable rod guide for a rod moveable within an oilfield tubular having an interior tubular surface for driving a downhole pump to pump liquids to the surface through the oilfield tubular. The rod guide comprises a body including interfitting body members. An outer tapered surface on one body member is engaged by an inner taper-engagement surface on the other body member, to urge the body members toward a rod gripping position about the rod. The mechanism disclosed provides a particularly strong engagement with the rod, so that the rod guide may be used for either reciprocating or rotating rods. For rotating type rod guides, an outer sleeve may be included about the body.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: August 14, 2007
    Assignee: Robbins & Myers Energy Systems L.P.
    Inventors: Gary E. Abdo, Tom Evans
  • Patent number: 7108063
    Abstract: Improved sucker rod joints for down hole petroleum pumping applications are provided within the form factor of standard API sucker rods, such that existing inventory in suitable condition is fully usable in more demanding applications. The pin ends are selected or processed such as to provide preselected axial distance between a flat pin end and at least one reference surface, such as a threaded region or reference shoulder or both. The coupler is dimensioned such that the pin ends are in abutment either with each other or with opposite sides of an intervening torque washer in the central region, when the connection is made to a selected level of thread engagement. Furthermore, the engagement is such as to put the pin ends in compression and the coextensive length of coupler in tension. This increases frictional restraints and locks the elements together to resist fatigue failure upon cycling and to insure together with an anaerobic adhesive sealant, against back threading.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: September 19, 2006
    Inventor: Kenneth J. Carstensen
  • Patent number: 6837643
    Abstract: A rod coupling formed of a tubular housing having a first box end and a second box end. The tubular housing has an interior surface defining a bore extending along the tubular housing from the first box end to the second box end, and has an exterior surface. Plural openings extending transversely through the housing from the interior surface to the exterior surface. A coating on the exterior surface of the tubular housing covers the plural openings, and may fill the openings or extend through the openings to form knobs inside the tubular housing. The coatings may taper from the exterior surface towards the interior surface. The openings are preferably distributed uniformly around the tubular housing. The openings are preferably distributed in plural rows. A rod string may be made up of plural such rod couplings and connecting rods.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: January 4, 2005
    Inventor: Arthur W. Lauder
  • Patent number: 6830102
    Abstract: A centraliser primarily for use when casing an oil or gas well, the centraliser having low frictions coatings or sliders on the outer surface thereof.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: December 14, 2004
    Assignee: Downhole Products PLC
    Inventors: Ian Alastair Kirk, William Barron, Alistair Bertram Clark
  • Publication number: 20040226714
    Abstract: A limit clamp for securing a tool to a casing having a groove in its outer surface. The limit clamp comprises a block having a base and a flange. The base is positioned in the groove to contact at least one stop in the groove and the flange extends out of the groove. The limit clamp also comprise a lock ring encircling the block and the casing, wherein the lock ring engages the block.
    Type: Application
    Filed: May 14, 2003
    Publication date: November 18, 2004
    Inventors: Henry E. Rogers, Earl D. Webb
  • Patent number: 6776247
    Abstract: The present invention is for a drill string stabiliser tool (18) used in borehole drilling. The tool includes a symmetrical body (20) with a plurality of external recesses (22). The recesses (22) have internal opposite surfaces (23) which converge inwardly from the outer surface of the body. A pad assembly (24) is disposed in each recess (22) and includes a wedge block (28) with converging radially inwardly opposite side surface (29) complementarily abutting said recess surfaces. Each wedge block (28) has a bolt (30) securing said wedge block (28) to said body (20) and is slightly larger dimensioned than the recess (22). The angles of the wedge blocks and the recesses are so chosen to effect an interference fit so that when the wedge block (28) is forced into the recess (22) by use of the bolt (30) it is held there by an interference fit.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: August 17, 2004
    Assignee: Gearhart Australia Ltd.
    Inventor: Adel Ali Bassal
  • Publication number: 20040011532
    Abstract: A combined guide and automatic rod rotator device for a downhole sucker rod which is reciprocating axially. The sucker rod is connected with a swivel mechanism to allow rotational movement of the sucker rod. The combined guide and automatic rod rotator device includes a cylindrical body and at least two vanes extending radially from the cylindrical body, wherein the vanes are helically arranged on the body.
    Type: Application
    Filed: July 16, 2002
    Publication date: January 22, 2004
    Inventor: Jack D. White
  • Patent number: 6637509
    Abstract: A stuffing box support assembly is configured to be positioned between a production pumping tree and a stuffing box of a wellhead. In use, the support assembly functions like a joint between the wellhead production tree and the stuffing box. The support assembly is configured such that it could tilt or move laterally to maintain a coaxial relationship between the stuffing box and a polished rod extending therethrough. This alignment between the stuffing box and the polished rod reduces wear and tear of the stuffing box packing.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: October 28, 2003
    Assignee: Stream-Flo Industries Ltd.
    Inventors: Keith D. Farquharson, Daniel J. Riddell
  • Patent number: 6516877
    Abstract: An apparatus for reducing abrasive wear within a housing that includes a body having at least one protrusion selectively positioned and extending outwardly from the outer surface thereof, the body being placed concentrically within the housing and rubbing against the inside surface thereof as the body is moved within the housing. The body is provided with a plurality of slides residing in a like number of grooves formed on the outside surface thereof, each of the slides having a groove formed in at least one side surface thereof The slides are affixed to the body by deforming the material comprising the body into the groove formed in the slide by striking the surface of the material comprising the body adjacent the groove in which the slide resides with enough force to deform the material comprising the body into the groove formed in the side surface of the slide. The apparatus is particularly effective for use with the sucker rod of a pump jack for a subterranean petroleum well.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: February 11, 2003
    Inventor: Marcus Terry
  • Publication number: 20030024707
    Abstract: A tubing centralizer for borehole drilling disclosed. The centralizer includes a retaining collar and an outer sleeve. In a method for installing the centralizer onto a joint of tubing, the retaining collar is mounted onto the joint of tubing and the outer sleeve is installed thereover.
    Type: Application
    Filed: September 27, 2002
    Publication date: February 6, 2003
    Inventors: Per G. Angman, Robert M. Tessari
  • Publication number: 20020092647
    Abstract: An apparatus for reducing abrasive wear within a housing that includes a body having at least one protrusion selectively positioned and extending outwardly from the outer surface thereof, the body being placed concentrically within the housing and rubbing against the inside surface thereof as the body is moved within the housing. The body is provided with a plurality of slides residing in a like number of grooves formed on the outside surface thereof, each of the slides having a groove formed in at least one side surface thereof The slides are affixed to the body by deforming the material comprising the body into the groove formed in the slide by striking the surface of the material comprising the body adjacent the groove in which the slide resides with enough force to deform the material comprising the body into the groove formed in the side surface of the slide. The apparatus is particularly effective for use with the sucker rod of a pump jack for a subterranean petroleum well.
    Type: Application
    Filed: January 17, 2001
    Publication date: July 18, 2002
    Inventor: Marcus Terry