Wiper Patents (Class 166/177.3)
  • Publication number: 20150136384
    Abstract: A tubing pump includes a seal housing insertable into a production string of tubing with a seal assembly mounted in an interior of the seal housing. The assembly includes at least an upper seal and seal holder and a lower seal and seal holder, each seal energizable by fluid to provide a fluid-tight seal around a reciprocating tubular member. The seals and holders are isolated from each other in a manner whereby the lower seal remains un-energized until the seal above it fails.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 21, 2015
    Inventor: John Edward STACHOWIAK, JR.
  • Patent number: 9004173
    Abstract: Wiper plugs or other shapes are made from shape memory foam in a size large enough to wipe or clean a tubular of a predetermined size. The plug or other shape is then reformed to a smaller dimension above its transition temperature and allowed to cool while holding that shape. The smaller shape allows delivery through a running string that is smaller than the tubular string to be wiped. Preferably before reaching the string to be wiped, the trigger is applied to get the wiper or other shape above its transition temperature where it then reverts to the prior larger dimension for effective wiping of the string that it will next pass through. The trigger can be well fluid temperature or composition, applied heat from the tubular, generated heat within the wiper or other shape, or heat released from agents introduced into the well acting alone or in conjunction with well fluids.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: April 14, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Bennett M. Richard, Oleg A. Mazyar
  • Patent number: 8973652
    Abstract: The pipe wiper assembly of the present invention assists with wiping the pipe as the pipe is removed from the hole (“tripped out”). The pipe passes through the two pipe apertures of the pipe wiper assembly during the removal. Two upper containment arms adjust between an open position and a closed position within the housing to form the upper pipe aperture. The lower containment lip forms the lower piper aperture. The upper containment arms and lower containment lip partially enclose the housing to prevent the wiper from exiting the wiper storage. The containment arms slideably adjust to eliminate the need for hinges. The removal of the hinges provides for easier storage and transportation of the pipe wiper assembly. The removal of hinges also reduces manufacturing costs of the pipe wiper assembly.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: March 10, 2015
    Assignee: Pruitt Tool & Supply Co.
    Inventors: Grant Pruitt, Cris Braun
  • Patent number: 8857517
    Abstract: A well tool (100) for use in cleaning a well of fluids and debris characterized by one or more wiper elements (30) for swabbing the wellbore and internal passageways (11, 15) and valves (70, 72) in the tool, permitting forward and reverse fluid circulation through the tool to bypass the wiper elements.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: October 14, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Kevin O. Trahan, Benton T. Knobloch, Jr., Todd J. Roy, Javier E. Bolivar
  • Publication number: 20140144644
    Abstract: A tool for cleaning a casing tubular (13??) via a narrower casing tubular (9??) or width restriction, has an elongate tool body 1 with axial throughbore 2, box 3 for a corresponding pin 4 to form a tool joint with a workstring 5. In FIG. 1, the body has a nose 6 with fluid discharge channel 7 to pass circulation fluid. An internal shoulder provides a valve seat 8 for a ball 9 passed through the workstring under gravity or during pumping of fluid. Transverse channels 10 receive fluid diverted when the ball is seated within the tool. A side surface 21 has fluid outlet ports 11, and at least one further working surface 22 has tool elements, e.g. bristle-type cleaning elements 23, or scrapers or wipers. Thus the tool body is asymmetrical offering jetting functionality on one side of the tool and mechanical cleaning on the other side.
    Type: Application
    Filed: March 15, 2012
    Publication date: May 29, 2014
    Applicant: M-I DRILLING FLUIDS U.K. LIMITED
    Inventor: George Telfer
  • Publication number: 20140131045
    Abstract: Downhole tool positioning systems and methods are disclosed which employ buoyancy-mediated tool displacement wherein the density of the tool or string connected to it, and the treatment fluid are matched to facilitate hydraulic translation of the tool in a deviated borehole or lateral with or without a mechanical translation device.
    Type: Application
    Filed: March 14, 2013
    Publication date: May 15, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: SCHLUMBERGER TECHNOLOGY CORPORATION
  • Patent number: 8360141
    Abstract: A launching tool with interlock system for a downhole cement plug includes a mandrel having one or more windows therein; an interlock system disposed at the mandrel, the interlock system having a release member; one or more dogs extending from the release member through the one or more windows; a collet disposed at the mandrel and restrained by a restrainer, the restrainer releasable only after release of the interlock system and method.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: January 29, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Sidney K. Smith
  • Publication number: 20120186802
    Abstract: System, devices, and methods are described relating to the treatment (e.g., perforating, fracturing, foam stimulation, acid treatment, cement treatment, etc.) of well-bores (e.g., cased oil and/or gas wells). In at least one example, a method is provided for treatment of a region in a well, the method comprising: positioning, in a well-bore, a packer above the region of the well-bore, fixing, below the region, an expansion packer, treating the region, the treatment fixing the packer, moving the expansion packer, and moving the packer after the moving of the expansion packer.
    Type: Application
    Filed: April 3, 2012
    Publication date: July 26, 2012
    Applicant: Pioneer Natural Resources USA, Inc.
    Inventors: Dustin Howard, Phillip Mandrell, Marty Stromquist
  • Patent number: 8146667
    Abstract: The method of removing a first liquid from a subsea pipeline which has a central portion lower than each of the ends of the subsea pipeline by pumping a second lower density fluid into the pipeline and the either removing the second lower density fluid by either displacing it with gas or evaporating the second lower density fluid to a gas.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: April 3, 2012
    Inventors: Marc Moszkowski, Benton Frederick Baugh
  • Patent number: 8127846
    Abstract: A method and system for cementing and perforating a wellbore in a single step by coupling a perforating gun with a wiper plug. The method includes injecting cement in a wellbore having casing therein and an annulus between the casing and wellbore. A wiper plug is dropped on the cement having a perforating gun attached to the wiper plug. The plug is forced downward pulling the perforating gun along. The downward motion of the plug in turn pushes the cement out the bottom end of the casing and into the annulus. The cement in the annulus is allowed to set and the perforating gun is activated.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: March 6, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Freeman L. Hill, Randy L. Evans, John H. Clark, Mark L. Sloan, William D. Myers, Jr., Joseph Gregory Barolak, George Patton
  • Patent number: 8090227
    Abstract: Purging of fiber optic conduits in subterranean wells. A downhole optical sensing system includes an optical line, at least two tubular conduits, one conduit being positioned within the other conduit, and the optical line being positioned within at least one of the conduits, and a purging medium flowed in one direction through one conduit, and flowed in an opposite direction between the conduits. A method of purging a downhole optical sensing system includes the steps of: installing at least two conduits and an optical line in a well as part of the sensing system, one conduit being positioned within the other conduit, and the optical line being positioned within at least one of the conduits; and flowing a purging medium through the conduits in the well, so that the purging medium flows in one direction through one conduit and in an opposite direction between the conduits.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: January 3, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Neal G. Skinner
  • Publication number: 20110198082
    Abstract: A tool assembly and method for completing a well are provided. The tool includes debris relief features that enable use in solids-laden environments, for example in the presence of sand. Forward and reverse circulation pathways to the isolated interval are present to allow clearing of debris from the wellbore annulus while the sealing device remains set against the wellbore.
    Type: Application
    Filed: February 19, 2010
    Publication date: August 18, 2011
    Applicant: NCS OILFIELD SERVICES CANADA INC.
    Inventors: Marty Stromquist, Donald Getzlaf, Robert Nipper
  • Patent number: 7987906
    Abstract: A gas insertion tool for cleaning a well bore is connected to the down hole end of a fluid supply tubing inserted through a positioning string within a well bore. Fluid pressure within the string pushes the well tool therethrough pulling the fluid supply line and then exiting the well string within the well bore adjacent its termination. The positioning string is retrieved leaving the tool wedgeably secured within the well bore for dispensing pressurized fluid within the well bore dislodging fluid and trapped foreign material within the horizontal leg of the well bore.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: August 2, 2011
    Inventor: Joseph Troy
  • Publication number: 20110139436
    Abstract: A temperature conditioned stuffing box includes a housing having an outer surface, an inner surface defining a packing-receiving bore, a lower surface for attaching to a wellhead and an upper surface. A flow passage through the housing for passing temperature-conditioned fluid through the housing has an input and an output.
    Type: Application
    Filed: May 27, 2009
    Publication date: June 16, 2011
    Inventor: Perry St. Denis
  • Patent number: 7918283
    Abstract: A system for assuring subsea hydrocarbon production flow in pipelines by chilling the hydrocarbon production flow in a heat exchanger and causing solids to form, periodically removing deposits and placing them in a slurry utilizing a closed loop pig launching and receiving systems.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: April 5, 2011
    Assignee: Shell Oil Company
    Inventors: Szabolcs Roland Balkanyi, James George Broze, Joseph Oscar Esparza, Gregory John Hatton, Ajay Praful Mehta, Chien Kuei Tsai, Moye Wicks, III, George John Zabaras
  • Patent number: 7845400
    Abstract: A wiper plug release tool uses a first pump down plug that lands in the tool to pressurize an internal chamber to slide a sleeve that undermines a set of dogs to allow the lower wiper plug to be decoupled from support. The shifting of this sleeve cams a second set of dogs into an internal passage in the tool to act as a landing location for a second pump down plug. Landing the second pump down plug on the now extended dogs allows a net pressure to be applied to an upper piston which shifts a sleeve to release the support for the second wiper plug. The upper piston remains in pressure balance unless the second pump down plug can be landed on the dogs that only extended because the sleeve that released the lower wiper plug had shifted.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: December 7, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Sidney K. Smith, Jr., Donald G. Parmer, Jr.
  • Patent number: 7845401
    Abstract: A wiper plug has a telescoping feature to allow it to be shorter while in a lubricator so as to reduce lubricator length as compared to an extended length for proper propulsion past off center openings such as side pocket mandrels in the string. The wiper has a telescoping feature that allows it to extend when dropping or being pumped from a lubricator. Once extended, it can lock in the extended position so that it doesn't collapse on the way down the string. Centralizers can optionally be used between an upper and a lower wiping section.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: December 7, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Samuel L. Wildman, Jack David Farmer
  • Patent number: 7703523
    Abstract: Apparatus for use above and below a restriction in a well bore and a method of operation is described. The apparatus comprises an upper element, such as a wiper, operable in the well bore above the restriction and a lower element, which may be a lower wiper, operable in the well bore below the restriction. A drop ball sized to pass through the restriction is released from the upper element and thereby passes through the restriction to operate the lower element. In one embodiment, the apparatus is incorporated into a running tool, which may be used to hang liners by dimple forming.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: April 27, 2010
    Assignee: Caledus Limited
    Inventor: Michael Wardley
  • Patent number: 7681634
    Abstract: An apparatus is provided for cleaning a drill string of drilling mud during tripping, the apparatus being provided with a mass and a volume such that it is able to float on a surface of the drilling mud in the drill string during the tripping operation. The apparatus includes a wiper device which is bellows-shaped, and a weight which is fastened to the top of the wiper device.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: March 23, 2010
    Assignee: 2K Tech AS
    Inventors: Ketil Botnmark, Kjell Mikalsen
  • Patent number: 7624806
    Abstract: A method of cleaning a pipe provides a tool within the pipe. The tool has a body of smaller diameter than the pipe such that the body and pipe define an annulus and a fluid guiding member located at the annulus and movable relative to the pipe. The fluid guiding member moves relative to the pipe to guide fluid forward of the fluid guiding member to a pipe outlet.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: December 1, 2009
    Assignee: Hamdeen Incorporated Limited
    Inventor: Richard Keith Booth
  • Publication number: 20090242191
    Abstract: A wiper plug has a telescoping feature to allow it to be shorter while in a lubricator so as to reduce lubricator length as compared to an extended length for proper propulsion past off center openings such as side pocket mandrels in the string. The wiper has a telescoping feature that allows it to extend when dropping or being pumped from a lubricator. Once extended, it can lock in the extended position so that it doesn't collapse on the way down the string. Centralizers can optionally be used between an upper and a lower wiping section.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 1, 2009
    Inventors: Samuel L. Wildman, Jack David Farmer
  • Publication number: 20090178799
    Abstract: A downhole well cleaning tool adapted for connection between upper and lower sections of an elongate string includes a pump barrel having at least one fluid outlet proximate its upper end. A swab assembly is connected to a pump mandrel for reciprocation within the pump barrel to pump fluids upward to the outlet to draw fluid and debris into the lower string section and trap the debris. A lower portion of the swab mandrel is hollow and open at a lower end thereof with at least one conduit extending through a side wall of the swab mandrel to direct fluid laterally outward from the hollow lower portion against the side wall of the pump barrel during lowering into fluid to reduce debris build-up within the pump barrel. A wear bushing is mounted between the pump mandrel and barrel and a knuckle or swivel joint connects the swab and pump mandrels.
    Type: Application
    Filed: January 12, 2009
    Publication date: July 16, 2009
    Inventor: Daren Shewchuk
  • Publication number: 20090166042
    Abstract: Purging of fiber optic conduits in subterranean wells. A downhole optical sensing system includes an optical line, at least two tubular conduits, one conduit being positioned within the other conduit, and the optical line being positioned within at least one of the conduits, and a purging medium flowed in one direction through one conduit, and flowed in an opposite direction between the conduits. A method of purging a downhole optical sensing system includes the steps of: installing at least two conduits and an optical line in a well as part of the sensing system, one conduit being positioned within the other conduit, and the optical line being positioned within at least one of the conduits; and flowing a purging medium through the conduits in the well, so that the purging medium flows in one direction through one conduit and in an opposite direction between the conduits.
    Type: Application
    Filed: December 18, 2008
    Publication date: July 2, 2009
    Applicant: WELLDYNAMICS, INC.
    Inventor: Neal G. SKINNER
  • Publication number: 20090078406
    Abstract: Method for reducing loss of flow due to hydrate solids deposits and wax deposition in a pipeline without the aid of chemicals and system for transporting a flow of wellstream hydrocarbons containing water, using a main pipeline and a cold-flow reactor connected to the main pipeline or within or forming a part of the pipeline, wherein at least a portion of the wellstream is fed to the cold-flow reactor. Also provided is a method for preventing hydrate nucleation and growth in a pipeline and preventing hydrate agglomeration as well as for preventing wax deposition. The provided method eliminates the use of energized equipment for melting, grinding or scraping hydrate solids from inside of pipelines or flowlines. Generating dry hydrates to be mixed with main flow of a wellstream is also described.
    Type: Application
    Filed: February 22, 2007
    Publication date: March 26, 2009
    Inventors: Larry D. Talley, Douglas J. Turner, Douglas K. Priedeman
  • Publication number: 20090014182
    Abstract: The drill pipe wiper system includes a plurality of coextensively shaped rectilinear support rails with axially opposed ends with a plurality of openings formed in the opposed ends of the support rails, a plurality of ports penetrating an outer surface of the support rails, and a plurality of spring-loaded latch pins. The system further includes a plurality of coextensively shaped rectilinear end rails and a mechanism for attaching the support rails to a support surface. The support rail attaching mechanism includes a plurality of coextensively shaped rectilinear beams, a plurality of cotter pins, a plurality of coupling members monolithically formed with the second ends of the shafts, and a rectilinear channel. A moisture removing mechanism includes a carrier assembly with a first plate, a second plate, a plurality of first slider guides, a third plate, a fourth plate, a plurality of second slider guides, and wiper pads.
    Type: Application
    Filed: July 10, 2007
    Publication date: January 15, 2009
    Inventor: Grant J. Frey
  • Patent number: 7475731
    Abstract: A plunger mechanism comprising radial peripheral holes extending outwardly from a center core to an outer surface through which a downhole gas may pass to clear an obstruction on the outer surface of the plunger, thereby enabling a self-cleaning action.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: January 13, 2009
    Assignee: Production Control Services, Inc.
    Inventor: Bruce M. Victor
  • Publication number: 20080202756
    Abstract: An apparatus and method for controlling and/or minimizing the formation or accumulation of unwanted deposits on the inside of fluid flow paths by employing at various locations along the path an assembly of permanent magnets oriented such that the fluid flow is preferably from the North magnetic pole to the South magnetic pole.
    Type: Application
    Filed: April 8, 2008
    Publication date: August 28, 2008
    Inventors: Terence Borst, Dudley J. Perio, Daniel Scott Alms
  • Patent number: 7404436
    Abstract: A downhole tool for conditioning a casing or liner. The tool includes blades having a circumferential peripheral edge for 360 degree contact with the casing or liner and are formed from a composite material which comprises a polymeric fiber. Such polymeric fibers include Kevlar®, Twaron®, Dyneema®, Spectra® and Diolen®. Bypass channels for fluid flow past the tool are provided in either the tool body or the blades.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: July 29, 2008
    Assignee: Hamdeen Incorporated Limited
    Inventor: Richard Keith Booth
  • Patent number: 7395865
    Abstract: A plunger in a plunger lift system in an oil and gas well includes shaped grooves spaced along the plunger body, angled fins or below the grooves, an elongated interior cavity open at the bottom, and passages connecting the interior cavity to the grooves. The shape, sizing and spacing of the grooves improves plunger seal and decreases liquid loss during plunger lift. The flutes or fins spin the plunger to clean the tubing string and prevent the plunger from becoming stuck in the lubricator. The interior cavity lightens the plunger and, in combination with the passages, improves the seal created by the shaped grooves.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: July 8, 2008
    Assignee: Well Master Corp.
    Inventor: Robert E. Bender
  • Patent number: 7261153
    Abstract: A packer cup for use in sealing the interior of a pipe under pressure is described. The cup uses a bell-shaped end which has a lip of softer material which is integral with the body of the cup which is harder material. Under pressure the lip expands against the side of the pipe and as pressure increases the body of the bell also expands against the pipe.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: August 28, 2007
    Inventor: Albert E. Plomp
  • Patent number: 7143829
    Abstract: A downhole tool for conditioning a casing or liner. The tool includes blades having a a circumferential peripheral edge for 360 degree contact with the casing or liner and are formed from a composite material which comprises a polymeric fiber. Such polymeric fibers include Kevlar®, Twaron®, Dyneema®, Spectra® and Diolen®. Bypass channels for fluid flow past the tool are provided in either the tool body or the blades.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 5, 2006
    Assignee: Hamdeen Incorporated Limited
    Inventor: Richard Keith Booth
  • Patent number: 7028769
    Abstract: Several well bore clean-out apparatus' are disclosed that provides a method of cleaning a well bore while the apparatus' are being deployed into a well forcing well bore fluid into a work string and for moving solids to the surface. A method of cleaning multiple diameters of well casings is also disclosed. A method of circulating or reverse circulating the well at anytime during the deployment of the apparatus' is disclosed.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: April 18, 2006
    Inventor: Albert Augustus Mullins
  • Patent number: 6953086
    Abstract: A traction apparatus (1) for propulsion along a bore comprises first and second traction members (6) having outwardly extending legs (14). A propulsion system for operating the traction members (6) comprises a turbine-driven shaft (7) which drives the traction members (6) by way of bearing members (15). In a first phase, one of the legs of the first traction member is moved in one direction whilst in contact with the traction surface to impart the propulsion force at the same time as one of the legs of the second traction member is moved in opposite direction whilst out of contact. In a second phase one of the legs of the second traction member is moved in said one direction whilst in contact with the traction surface to impart the propulsion force at the same time as one of the legs of the first traction member is moved in opposite direction whilst out of contact.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: October 11, 2005
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Neil Andrew Abercrombie Simpson
  • Patent number: 6901999
    Abstract: A swabbing tool for wells that filters particulates from fluids passing through the swabbing tool. The swabbing tool comprises a mandrel, at least one swab cup on the mandrel, the mandrel and swab cup being arranged to allow fluids to pass from below to above the swab cup; and a sifter attached to the swabbing tool below the swab cup for filtering particulates from fluid passing from below to above the swab cup. The sifter is barrel shaped and is provided with a sealing element attached to the sifter to force fluid into the sifter. The sifter has an interior and the sealing element is dimensioned to seal against a casing or tubing wall and force fluid into the sifter. The openings in the sand sifting element may be slots, with a size between 0.125 mm to 0.635 mm.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: June 7, 2005
    Assignee: Nabors Industries, Inc.
    Inventor: Daryl R. Sugden
  • Patent number: 6851480
    Abstract: An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design that releases shut in production gas below the pumping device and provides a positive pressure differential across the pumping device prior to valve opening.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: February 8, 2005
    Assignee: Brandywine Energy and Development Company, Inc.
    Inventors: Gerald L. Swoyer, Charles H. Hunt, Paul M. Yaniga, Richard J. Bordogna
  • Patent number: 6799638
    Abstract: A running tool for wiper plugs used in cementing well casings into a wellbore. The running tool and setting balls or darts used to launch the plugs are retrievable following deployment of the plugs. Flapper valve assemblies on the wiper plugs are activated after the plugs are displaced from the running tool to eliminate the requirement to maintain a setting ball or dart in engagement with the wiper plug as the assembly is pumped down the well casing. Because of being retrievable, the mandrel, setting sleeves and setting ball or dart may be constructed of any desirable high-strength material without regard to the need to drill up the material following completion of the cementing job. The use of high-strength steel permits large flow passages to be employed in the cementing plugs by eliminating the need for large volumes of drillable metals in the plugs. The running tool protects the flapper valve seal surfaces from circulating fluids prior to deployment of the plugs from the tool.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: October 5, 2004
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Charles A. Butterfield, Jr.
  • Publication number: 20040112588
    Abstract: Several well bore clean-out apparatus' are disclosed that provides a method of cleaning a well bore while the apparatus' are being deployed into a well forcing well bore fluid into a work string and for moving solids to the surface. A method of cleaning multiple diameters of well casings is also disclosed. A method of circulating or reverse circulating the well at anytime during the deployment of the apparatus' is disclosed.
    Type: Application
    Filed: October 28, 2003
    Publication date: June 17, 2004
    Inventor: Albert Augustus Mullins
  • Patent number: 6745839
    Abstract: Oilfield cleaning apparatus is provided for cleaning the inner wall of an oilfield tubular. The apparatus comprises a body to be introduced into the tubular, the body being provided with annular cleaning elements. Furthermore a rotary drive acts to oscillate the cleaning elements in contact with the inner wall of the tubular to scrape debris from the inner wall with the cleaning element. Each cleaning element is mounted on a rotary bearing member which is inclined relative to its axis of rotation so as to cause the cleaning element to be oscillated axially in contact with the inner wall as the bearing member is rotated, Also a catcher tube is provided to catch the heavier debris which is not washed away by the flow of fluid up the borehole. Such apparatus provides an active cleaning action which is particularly effective in removing deposits from the inner wall of the tubular.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: June 8, 2004
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Neil Andrew Abercrombie Simpson
  • Publication number: 20040104025
    Abstract: A non-rotating cement wiper plug has an insert, with inner and outer telescoping sleeves, within a resilient outer body. The outer body has annular fins which bear against a casing wall. The inner sleeve has a tapering nose within a tapered cavity in the outer sleeve. Slots in the outer sleeve form a plurality of segments. The inner and outer sleeves are preferably of a frangible material. When the plug is pumped down and lodges against downhole float equipment, pump pressure compresses the plug, forces the inner sleeve down within the outer sleeve, forces the segments radially outward, and fractures or separates the outer sleeve segments. The outer body is forced against the casing wall so tightly that it cannot rotate in response to the forces from a rotary drill bit. Lock surfaces on the inner and outer sleeves lock them together and maintain the outer body in its forced-outwardly position.
    Type: Application
    Filed: December 3, 2002
    Publication date: June 3, 2004
    Inventor: Raymond F. Mikolajczyk
  • Publication number: 20040099413
    Abstract: A wellbore cleanup tool and method are described. In one embodiment, the fluid is displaced with a cup seal into the tubing/drill pipe as the seal is lowered into the wellbore. In another embodiment reverse circulation directs debris into the tubing/drill pipe as it is loosened on the trip into the hole. The returning fluid laden with debris can be directed to either below the cleaning equipment or above it when used with a cup seal and a return port adjacent to it.
    Type: Application
    Filed: November 27, 2002
    Publication date: May 27, 2004
    Inventor: Thomas K. Arceneaux
  • Patent number: 6739391
    Abstract: A separation barrier for placement in an open well bore or casing, to prevent migration of cement slurry downwardly into the drilling fluid, facilitating the placement of a cement plug to segregate a well bore into uphole and downhole portions. The barrier has an annular seal which facilitates pumping the barrier downhole through a work string to a desired location. The separation barrier also has a plurality of flexible elongated elements which expand outwardly when the barrier exits the work string. The elongated elements are closely spaced to prevent migration or contamination of cement slurry therebetween. The barrier can also have a shearable landing ring for providing positive indication of placement of the barrier at the desired location.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: May 25, 2004
    Assignee: Baker Hughes Incorporated
    Inventor: Michael E. McMahan
  • Patent number: 6725917
    Abstract: Apparatus (10) for facilitating coupling and cementing of downhole tubulars (12, 28) comprises a tubing section (12, 10) for use in lining a bore. The tubing section has upper and lower ends and defines a tubing wall having cement outlets (20) spaced from the lower end of the tubing. The lower end of the tubing is selectively closed, and swab cups (22) are provided externally of the lower end of the tubing below the cement outlets (20) for restricting passage of cement.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: April 27, 2004
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Paul David Metcalfe
  • Publication number: 20040020641
    Abstract: The present invention relates to an apparatus for dropping a ball into a wellbore. The apparatus is particularly useful for dropping a ball that has a diameter that is larger than the diameter of a bore within a wellbore tool above the apparatus. The ball-releasing apparatus first comprises a tubular body. The tubular body has a bore therethrough that is in fluid communication with the bore of the wellbore tool. A piston is placed within the tubular body. The piston has a top end disposed within the tubular body, and a bottom end disposed below the bore of the wellbore tool. The ball-releasing apparatus further comprises a connector for releasably connecting the piston to the ball. In one arrangement, the ball-releasing apparatus is connected to the bottom of a wiper plug for dropping a ball during a wellbore cementing operation.
    Type: Application
    Filed: July 30, 2002
    Publication date: February 5, 2004
    Inventor: Marcel Budde
  • Publication number: 20030230405
    Abstract: The present invention relates to a wiper plug and internal drop ball mechanism that may be used in conjunction with a downhole surge reduction tool to run, hang, and cement casing liners in a wellbore. The apparatus of the present invention comprises a wiper plug assembly removably attached to the drill string within the casing liner, a drop ball sub attached below the wiper plug assembly which releases a float valve actuator ball having a diameter larger than the drill string, and float equipment having a plurality of flapper valves. The apparatus of the present invention may further comprise a diverter tool connected between the drill string and the casing liner.
    Type: Application
    Filed: January 17, 2003
    Publication date: December 18, 2003
    Inventors: Jerry P. Allamon, Jack E. Miller, Kenneth D. Waggener
  • Patent number: 6595282
    Abstract: A wiper plug for downhole use is disclosed. It features an inflatable structure that allows it to ride inside tubulars that change or gradually vary in inside diameter. In a preferred embodiment the bladder is actuated by fluid displaced by a biased piston. The piston is capable of moving in opposite directions to allow original insertion into a launcher and subsequent bladder expansion. In another embodiment, the piston can be fluid driven in opposed directions by a pump and an on board control system which can regulate, on a real time basis, the contact pressure of the bladder to a predetermined level or range, as the bladder encounters varying interior wall diameters of the tubular string or associated equipment.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: July 22, 2003
    Assignee: Baker Hughes Incorporated
    Inventor: Sidney K. Smith, Jr.
  • Patent number: 6523612
    Abstract: One or more brush bodies fabricated from an incompressible material, for example, from high density polyurethane, high density polyethylene, high density polypropylene, nylon, ORLON—synthetic forming polymers and copolymers of acrylic acid or its derivatives, high density plastics, phenolic resin-based materials hard rubber, wood, aluminum, or other easily drillable metals, are connected to, or integrally fabricated with one or more elastomeric, conventional cement plugs, and are pumped down within the interior of oilfield casing situated within an earth borehole, to minimize or eliminate the need to run a workstring of drillpipe and drill bit to clean out the interior of the string of casing.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: February 25, 2003
    Assignee: M-I L.L.C.
    Inventor: James Scott Reynolds
  • Patent number: 6513590
    Abstract: The present invention relates to a wiper plug and internal drop ball mechanism that may be used in conjunction with a downhole surge reduction tool to run, hang, and cement casing liners in a wellbore. The apparatus of the present invention comprises a wiper plug assembly removably attached to the drill string within the casing liner, a drop ball sub attached below the wiper plug assembly which releases a float valve actuator ball having a diameter larger than the drill string, and float equipment having a plurality of flapper valves. The apparatus of the present invention may further comprise a diverter tool connected between the drill string and the casing liner.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: February 4, 2003
    Inventors: Jerry P. Allamon, Kenneth David Waggener, Jack E. Miller
  • Patent number: 6491103
    Abstract: The present invention relates to a wiper plug and internal drop ball mechanism that may be used in conjunction with a downhole surge reduction tool to run, hang, and cement casing liners in a wellbore. The apparatus of the present invention comprises a wiper plug assembly removably attached to the drill string within the casing liner, a drop ball sub attached below the wiper plug assembly which releases a float valve actuator ball having a diameter larger than the drill string, and float equipment having a plurality of flapper valves. The apparatus of the present invention may further comprise a diverter tool connected between the drill string and the casing liner.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: December 10, 2002
    Inventors: Jerry P. Allamon, Kenneth David Waggener
  • Publication number: 20020144812
    Abstract: A wiper plug for downhole use is disclosed. It features an inflatable structure that allows it to ride inside tubulars that change or gradually vary in inside diameter. In a preferred embodiment the bladder is actuated by fluid displaced by a biased piston. The piston is capable of moving in opposite directions to allow original insertion into a launcher and subsequent bladder expansion. In another embodiment, the piston can be fluid driven in opposed directions by a pump and an on board control system which can regulate, on a real time basis, the contact pressure of the bladder to a predetermined level or range, as the bladder encounters varying interior wall diameters of the tubular string or associated equipment.
    Type: Application
    Filed: April 10, 2001
    Publication date: October 10, 2002
    Inventor: Sidney K. Smith
  • Patent number: 6460616
    Abstract: A traction apparatus (1A) includes at least one traction member (51) when engages a surface (10A) against which traction is to be provided. The traction member can move relatively freely in one direction over the surface but has high resistance to movement in the other direction. The apparatus can be made to move by having a number of traction members (51-56) which move or oscillate relative to each other. There are preferably a large number of traction members which are in the forms of bristles in a brushlike part of the apparatus. The apparatus is suitable for use in down-hole tools. The bristles are bent in a first direction by being constrained in a hole facilitating movement in the opposite direction but preventing movement in the first direction.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: October 8, 2002
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Neil Andrew Abercrombie Simpson