Reciprocable Relative To Central Member Extending From Well Top Patents (Class 166/175)
  • Patent number: 9140100
    Abstract: A wellbore cleaning device comprises a tubular section, a helical scratcher mounted thereon. The helical scratcher contains flexible wires characterized in that the helical scratcher is able to rotate axially to the tubular section when a fluid flows axially to the tubular section. A method for using the device comprises placing the device into the wellbore; allowing the fluid flowing axially to the wellbore wall to rotate the scratcher; removing a deposit at wellbore wall; and leaving a cleaned wellbore wall.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: September 22, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Gérard Daccord, Diego Moser, Mathew Samuel
  • Patent number: 8869884
    Abstract: A downhole cleaning tool for cleaning a casing is provided with a diverter cup assembly (102) including a housing (126) and a resilient swab cup (105) slidably mounted on a tubular body (120) with an increased external diameter portion 128 defining at either end upper and lower limit stops (130, 132), and sized to make provision for a gap (136) which allows a sliding movement of the swab cup such that only one of limit stops (130, 132) engages to always pull the swab cup via optional bearings (134) at each extremity of the sliding travel according to whether the tool is being run in hole or pulled out of the hole. This means that the swab cup is not compressed into a squat oversize shape susceptible to contact damage, and is naturally drawn out to tend towards an elongate shape in either direction of tool motion.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: October 28, 2014
    Assignee: Specialised Petroleum Services Group Limited
    Inventor: George Telfer
  • Patent number: 8141628
    Abstract: A downhole deburring tool is equipped with retractable cutters which permit it to fit through restrictions in a wellbore—e.g., a subsurface safety valve—and subsequently expand to deburr or scrape a section of tubing having an internal diameter greater than that of the restriction. In one preferred embodiment, tapered surfaces on the tool act to effect retraction of the cutters during withdrawal of the tool from a wellbore. Deburring operations with the tool may increase the effectiveness of bridge plugs and/or ball sealer systems to permit chemical treatment of selected zones. Scraping operations with the tool to remove scale, corrosion and other material from the inner surface of a well tubular can increase the effective diameter of the tubing thereby allowing greater production.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: March 27, 2012
    Assignee: Precision Energy Services, Inc.
    Inventor: Paul Douglas Hart
  • Publication number: 20110253376
    Abstract: An assembly for removing debris and/or conducting a wellbore operation may include a mandrel, a sliding sleeve rotationally coupled to the mandrel, and a flushing sleeve coupled to the sliding sleeve. A releasable connection may temporarily prevent axial movement between the sliding sleeve and the mandrel. A downhole tool may be coupled to the mandrel to conduct the wellbore operation. The flushing sleeve may be hydraulically actuated to an extended position ahead of the downhole tool. A method of removing debris from a wellbore and conducting a wellbore operation may include lowering an assembly into the wellbore, supplying pressurized fluid into the wellbore using the assembly to remove debris from the wellbore, and moving a downhole tool to a position where at least a portion of the downhole tool is disposed outside of the assembly to conduct the wellbore operation.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 20, 2011
    Inventor: Mark Wayne Krpec
  • Patent number: 7836947
    Abstract: A cleaning device connectable to a downhole tool for use within a well bore, the cleaning device comprising: a base member non-rotatably mountable to the downhole tool; and at least one sleeve member rotatably mountable to and around the base member, the sleeve member having a support member and at least one protruding member which protrudes from the support member and which, in use, contacts an inner surface of the well bore, wherein the support member comprises a bearing material.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: November 23, 2010
    Inventor: Richard Keith Booth
  • Patent number: 7096950
    Abstract: A downhole tool (1) for providing the dual role of cleaning and milling within a wellbore casing or liner is described. In an embodiment scraper blades (6) are mounted on a body (2) together with a milling sleeve (4). Additionally, a centralizer sleeve (3) is incorporated as is a filter and/or junk basket for collecting debris is dislodged from the casing or liner during the cleaning and milling operation. The milling sleeve (4) can be locked onto the body (2) while the cleaning members e.g. scraper blades (6) may be free floating around the tool (1).
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: August 29, 2006
    Assignee: Specialised Petroleum Services Group Limited
    Inventors: Paul David Howlett, George Telfer
  • Patent number: 6834889
    Abstract: This invention relates to a torque release coupling for use in drill strings comprising an outer string part (1) rotatably mounted outside a radially inner string part (2), and a rotation lock (3) positioned between them. The rotation lock (3) is coupled to a first of said string parts (1, 2) with a coupling device (4, 9) adapted to allow axial shifts relative to the first string part, and comprising axial gripping organs (5) adapted for releasable engagement with cooperating gripping organs in the second string part, the rotation lock (3) comprising a spring (6) or similar adapted to apply an axial force on the rotation lock (3) directed against the cooperating gripping organs (5) from the first string part.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: December 28, 2004
    Assignee: Den norske stats oljesselskap A.S.
    Inventors: Egil Sunde, Morten Hyvik, Per Olav Haughom
  • Patent number: 6758276
    Abstract: A tubular body or mandrel incorporated into a string of tubular pipe, on which first and second swab cups and first and second metal brushes and a casing scraper are mounted, is run into a cased earth borehole to displace a first fluid in the borehole, usually a drilling fluid, with a second fluid, usually either a completion fluid or a workover fluid. In a first embodiment, reverse circulation, in which the second fluid is pumped into the borehole annulus above the swab cups and/or the metal brushes, and in which the first fluid is thereby pumped back towards the earth's surface through the interior of the string of tubular pipe, causes displacement of the first fluid merely by lowering the string of pipe while pumping the second fluid into the borehole annulus.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: July 6, 2004
    Assignee: M-I L.L.C.
    Inventor: J. Scott Reynolds
  • 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
  • Patent number: 6710019
    Abstract: The present invention relates to a wellbore fluid comprising a particulate material composed of the reaction product of A) one or more water soluble organic compound having possessing a molecular weight of less than 30,000 and possessing at least two hydroxyl groups and B) any other organic compound(s) capable of forming acetal or hemiacetal cross-links with the hydroxyl groups of compound A. The invention relates also to the specific particulate material itself and to applications of the wellbore fluid of the invention for well processes such as drilling, under-reaming, completing, working over, sealing loss zones, sealing fractures, sealing cavities or other very high permeability conduits in a rock formation, or hydraulic fracturing to stimulate a hydrocarbon-producing zone.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: March 23, 2004
    Inventors: Christopher Alan Sawdon, David Antony Ballard
  • Publication number: 20040031613
    Abstract: A method for cleaning and/or altering an inside surface and shape of a tubular in a wellbore. The method includes placing a surface finishing tool in the tubular, energizing the surface finishing tool, and causing extendable assemblies therein to extend radially to contact an inside diameter of the tubular. Moving the surface finishing tool axially and/or rotationally while the extended members are in contact with the inside diameter of the tubular cleans debris from the inside surface of the tubular. In another aspect of the invention, the tool burnishes the inside diameter of the tubular, thereby altering the surface characteristics and rounding the tubular.
    Type: Application
    Filed: August 16, 2002
    Publication date: February 19, 2004
    Applicant: Weatherford/Lamb, Inc.
    Inventor: Burt Martin
  • Patent number: 6289987
    Abstract: Apparatus for efficient cleaning of downhole equipment in boreholes, especially oil and gas wells drilled offshore from floating drilling vessels. The apparatus is a wash tool having an elongated central body with a longitudinal bore therethrough. A plurality of integral, outwardly-extending blades radiate outward from the central body. Wash ports extend radially from the longitudinal bore through the body of the blades, to the outermost surface of the blades and exiting at that point. Spiral or straight blades may be employed. A reduced diameter, extended nose portion is attached to the lower end of the tool. Removable jet nozzles may be installed in the wash ports near the outermost blade faces, to create a high velocity wash stream.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: September 18, 2001
    Inventor: Milford Lay, Jr.
  • Patent number: 6152220
    Abstract: A tool for use in a well bore has a housing attachable to a work string or drill string wherein the housing supports a floating component that is free to move in the lateral or radial members relative to the housing within predetermined limits. The floating component is suitable for supporting active tool components such as wire bristles, scraper blades or other functional apparatus. Typically, the floating component is provided as a sleeve around the housing held within axial limits, while enabling radial movement.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: November 28, 2000
    Assignee: Specialised Petroleum Services Limited
    Inventors: Mark Carmichael, Paul Howlett
  • Patent number: 5884700
    Abstract: A method and apparatus for treating the production tubing string of a flowing gas well is disclosed. The method includes introducing treatment fluid into the wellhead end of the production tubing string, allowing an applicator fall through the production tubing string thus applying a first coating of treatment fluid and retracting the applicator thus applying a second coating of the treatment fluid.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: March 23, 1999
    Assignee: Texaco Inc
    Inventors: Thomas H. Cook, Donald A. Branton, Ray D. Hudgins
  • Patent number: 5641018
    Abstract: An apparatus and method for cementing a pipe in a well. A wiper is engaged with a pipe section as the pipe section is lowered into the wellbore. The wiper contacts the wellbore as the pipe section is reciprocated or rotated within the wiper. The wiper contacts and cleans the exterior surface of the pipe section as the pipe section is moved relative to the wiper. By cleaning the exterior of the pipe section before cement is placed between the pipe section and the wellbore, the potential for channeling in the microannulus between the pipe section exterior and the cement is substantially reduced.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: June 24, 1997
    Inventor: Harlan R. King
  • Patent number: 5000260
    Abstract: A casing scraper is provided for scraping foreign materials from the inside of pipe casing and other tubular members. The casing scraper is comprised of a central mandrel supporting a plurality of longitudinally and circumferentially extending scraper blades, the collective configuration of the scraper blades comprising a tube structure with the mandrel located at the longitudinal axis of the tube structure. Connecting links attach the mandrel to the plurality of scraper blades. Said connecting links are each pivotally attached to the mandrel and to the scraper blades. An adjustable spring is provided at the base of the mandrel and biased against the underside of the connecting links normally biasing said connecting links at a right angle to the axis of the mandrel, thereby normally positioning the scraper blades at the maximum distance from the mandrel allowed by the length of the connecting links.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: March 19, 1991
    Assignee: New World Down Hole Tools, Incorporated
    Inventor: Martin J. Fontenot
  • Patent number: 4893684
    Abstract: A well bore annulus wiper plug is disclosed. The wiper plug has a central body and inner and outer elastomeric ribs. The ribs are generally in the shape of truncated cones. To operate the device, it is inserted in the annular space between well casing and a drill string. Fresh drilling mud is circulated downwardly through the annular space above the wiper plug. The wiper plug scrapes both the outside of the drill pipe and the inside of the casing free of a previous well fluid.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: January 16, 1990
    Assignee: Chevron Research Company
    Inventor: Robert L. Alexander
  • Patent number: 4530399
    Abstract: The invention provides a stop device for installation on a well conduit. The stop device is fabricated from semi-annular elements having one ends thereof pivotally interconnected by a hook and notch connection and the other ends stamped to provide apertured lugs traversed by a clamping device. The effective diameter of the stop is increased by a plurality of peripherally spaced, outwardly projecting notches formed in the top and bottom edges of the semi-annular elements.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: July 23, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventor: Harry W. Riddle
  • Patent number: 4452307
    Abstract: A reamer for removing paraffin, scale, ice and other accumulations from the inside surfaces of oil well pump tubing and casing and loosening tubing in a well, which includes a hollow shell or housing having a tapered base, which in a preferred embodiment is fitted with external blades for cutting, the reamer further provided with an enlarged upper internal bore area to accommodate a threaded lock nut, and a threaded shaft projecting into the housing cavity in threadable cooperation with the lock nut and provided with stops to permit limited rotation of the housing and base on the shaft and to prevent the shaft from exiting the housing when fully extended from the housing on the lock nut. When the reamer is lowered by means of a wire line and swivel joint into a length of tubing or casing to a constricted area and the shaft is extended from the housing, a repetitive impact load on the projecting end of the shaft effects rotation of the housing and base, and the blades cut into and remove the deposits.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: June 5, 1984
    Inventor: Gary B. Horton
  • Patent number: 4350204
    Abstract: A reamer for removing paraffin, scale, ice and other accumulations from the inside surfaces of oil well pump tubing and casing which includes a hollow, tapered shell or housing fitted with external blades and having an enlarged upper internal bore area to accommodate a threaded lock nut, and a threaded shaft projecting into the housing cavity in threadable cooperation with the lock nut and provided with stops to permit limited rotation of the shell on the shaft and to prevent the shaft from exiting the shell when fully extended from the shell on the lock nut. When the reamer is lowered by means of a wire line and swivel joint into a length of tubing or casing to the constricted area, and the shaft is extended in the shell, a repetitive impact load on the projecting end of the shaft effects rotation of the shell and blades on the shaft to remove the deposits.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: September 21, 1982
    Inventor: Gary B. Horton
  • Patent number: 4313500
    Abstract: The present invention is directed to a sacrificial or competitive adsorbate for surfactants contained in chemical flooding emulsions for enhanced oil recovery operations. The adsorbate to be utilized in the method of the present invention is a caustic effluent from the bleach stage or the weak black liquor from the digesters and pulp washers of the kraft pulping process. This effluent or weak black liquor is injected into an oil-bearing subterranean earth formation prior to or concurrent with the chemical flood emulsion and is adsorbed on the active mineral surfaces of the formation matrix so as to effectively reduce adsorption of surfactant in the chemical flood. Alternatively, the effluent or liquor can be injected into the subterranean earth formation subsequent to a chemical flood to displace the surfactant from the mineral surfaces for the recovery thereof.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: February 2, 1982
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: James S. Johnson, Jr., Clyde G. Westmoreland
  • Patent number: 3983938
    Abstract: A simple cylindrical paraffin scraping tool adapted to slidably ride up and down between spaced apart stop means on a sucker rod to scrape and remove hardened paraffin and similar deposits from the interior walls of oil well tubing with the scraping tools stored in operative readiness within the well during pumping of the oil well so that the scraping apparatus is immediately available when it becomes necessary to clean the well. Some minor preventive maintenance may be performed during continued pumping of the oil well by incidental agitation of the scrapers preventing and slowing the formation of deposits in the oil well tubing but the principal scraping operation occurs when and as the sucker rod line and attached plurality of scraper tools are pulled out of the well for periodic pump changes.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: October 5, 1976
    Inventors: Terrel B. Hellums, Jess Sanford Hellums, Jr.