Retractable On Support While Lowering Patents (Class 166/174)
  • Patent number: 9435168
    Abstract: A downhole activation assembly for activating a downhole component of a downhole tool positionable in a wellbore penetrating a subterranean formation. The activation assembly includes a housing operatively connectable to the downhole tool, a spring-loaded sleeve, and a ball catcher. The sleeve slidably positionable in the housing, and having a flow channel therethrough and an outer surface defining a chamber between the sleeve and the housing. The sleeve having inlets therethrough about a sleeve end thereof to permit fluid from the flow channel to pass therethrough. The ball catcher slidably positionable in the housing, and having a catcher end engageable with the sleeve end to selectively divert the fluid thereabout and a ball seat therein to receivingly engage a ball passing through the sleeve whereby the ball catcher selectively moves the downhole component between activation positions.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: September 6, 2016
    Assignee: National Oilwell DHT, L.P.
    Inventor: Khoi Trinh
  • Publication number: 20150053399
    Abstract: A method of cleaning a well face during formation testing at a drill site is disclosed. A collection chamber disposed in a formation tester tool may be at least partially filled with cleansing fluid. The formation tester tool may be introduced into a wellbore and the cleansing fluid may be ejected through a probe coupled to the formation tester tool. The collection chamber may then be at least partially filled with a formation fluid sample. A face of the probe may be contacted by a retractable cleaning mechanism coupled to the formation tester tool.
    Type: Application
    Filed: May 8, 2012
    Publication date: February 26, 2015
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Cyrus A. Irani, Clive D. Menezes
  • Patent number: 8939201
    Abstract: A space filler material is used to prevent accumulation of debris that could later foul the operation of adjacent moving parts. In one application a void space that is subsequently closed by actuated parts is initially filled with a material that is highly compressible and has voids that allow it to compress without undue resistance to part movement when the void volume is reduced. Ideally, the pores or voids in the material itself are small enough to keep most if not all the debris from entering and making the space filling material too rigid to collapse under part movement. In an alternative application, the material can be in an annular space such as a seal bore and it can keep debris from getting past the seal bore while allowing hydrostatic pressure across itself thereby helping it to maintain its position until moved such as by shifting of an inner string to which it is attached.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: January 27, 2015
    Assignee: Baker Hughes Incorporated
    Inventor: Edward J. O'Malley
  • Patent number: 8905126
    Abstract: In some embodiments, apparatus useful for cleaning at least part of the interior surface of a generally cylindrically-shaped member disposed in a subterranean well includes a housing and a plurality of retractable mill blades supported on the housing and movable from an initial retracted position to an extended position and thereafter to a final retracted position.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: December 9, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: George N. Krieg, David Hebert
  • Patent number: 8596348
    Abstract: A tool is run into a liner that holds an electrical or hydraulic connection for a downhole tool which preferably is an electric submersible pump (ESP). It is capable of cleaning the electrical contacts, replacing them, isolating them from well fluid if no ESP or other downhole tool is to be present for a long time or switching from a main to a backup supply cable or hydraulic line among other downhole functions. The liner with the exterior cable or hydraulic line attached remains in position. Applications to other tools that obtain power or hydraulic pressure in a downhole wet connection are contemplated.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: December 3, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Earl B. Brookbank
  • Publication number: 20130220596
    Abstract: This invention relates to well cleaning methods and apparatus. In particular, this invention relates to a method of drilling and cleaning a wellbore. In one embodiment of the invention, a method of drilling and cleaning a wellbore (12) is disclosed. The method comprises the steps of providing a drill string (10) having a drill bit (28) and a cleaning tool (24) with selectively activatable cleaning members (34); drilling a wellbore using the drill bit while maintaining the cleaning members in a deactivated position; and pulling the drill string from the wellbore with the cleaning members in an activated position, to thereby clean the wellbore. A corresponding cleaning tool is also disclosed.
    Type: Application
    Filed: April 1, 2013
    Publication date: August 29, 2013
    Applicant: Specialised Petroleum Services Group Limited
    Inventor: Specialised Petroleum Services Group Limited
  • Patent number: 8499831
    Abstract: In a formation pressure tester tool, an elongated filter piston possibly having a tapered or sharp edge configured to penetrate mud cake while the probe is being set. At the end of the setting sequence, the filter piston is retracted, thus opening a flowpath from the formation, through the mudcake, to the probe.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: August 6, 2013
    Assignee: Schlumberger Technology Corporation
    Inventor: Nathan Church
  • Patent number: 8464787
    Abstract: A space filler material is used to prevent accumulation of debris that could later foul the operation of adjacent moving parts. In one application a void space that is subsequently closed by actuated parts is initially filled with a material that is highly compressible and has voids that allow it to compress without undue resistance to part movement when the void volume is reduced. Ideally, the pores or voids in the material itself are small enough to keep most if not all the debris from entering and making the space filling material too rigid to collapse under part movement. In an alternative application, the material can be in an annular space such as a seal bore and it can keep debris from getting past the seal bore while allowing hydrostatic pressure across itself thereby helping it to maintain its position until moved such as by shifting of an inner string to which it is attached.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: June 18, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Edward J. O'Malley
  • Patent number: 8141627
    Abstract: In some embodiments, apparatus useful for cleaning at least part of the interior surface of a cylindrically-shaped member disposed in a subterranean well includes a housing and a plurality of retractable mill blades supported on the housing. The mill blades of such embodiments are capable of cleaning the entire circumference of the interior surface of at least a portion of the cylindrically-shaped member upon reciprocation of the housing.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: March 27, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: George N. Krieg, David Hebert, Graham J. Duplantis
  • Patent number: 8136587
    Abstract: A downhole tubular scraper is run in on slickline with an on board power supply. It features counter-rotating scrapers without an anchor in one embodiment or an anchor with single rotating scrapers. The scraper is selectively operated to conserve power in the power supply. A drive system uses a single driver to obtain counter-rotating motion in the scrapers.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: March 20, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Gerald D. Lynde, Yang Xu
  • Publication number: 20110214873
    Abstract: In some embodiments, apparatus useful for cleaning at least part of the interior surface of a generally cylindrically-shaped member disposed in a subterranean well includes a housing and a plurality of retractable mill blades supported on the housing and movable from an initial retracted position to an extended position and thereafter to a final retracted position.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 8, 2011
    Applicant: Baker Hughes Incorporated
    Inventors: George N. Krieg, David Hebert
  • Patent number: 8002037
    Abstract: A downhole cleaning tool comprising: a substantially cylindrical body; at least one cleaning member extending from the cylindrical body and being movable between a retracted position and an active position in which the cleaning member is positioned to clean an internal surface of the well bore; and switching means adapted to receive a force applied in a first direction and responsively move the at least one cleaning member from the retracted position to the active position.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: August 23, 2011
    Assignee: Hamdeen Incorporated Limited
    Inventor: Richard K. Booth
  • Patent number: 7950450
    Abstract: A method for cleaning and/or altering an inside surface and shape of a tubular is disclosed. 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: Grant
    Filed: July 6, 2004
    Date of Patent: May 31, 2011
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Burt Martin, Simon John Harrall
  • Patent number: 7870897
    Abstract: A cleaning tool for cleaning a liner top in a well bore. The tool includes cleaning elements, typically scrapers, which are arranged eccentrically to an axial bore through the tool. The elements are biased outwardly to contact an inner surface of a polished bore receptacle (PBR) at a position with a curvature to match the PBR and to present leading edges of each element when positioned at a surface of a neighbouring casing. The tool may further provide a top dress mill and act as a packer actuator sub. This provides a tool which performs a number of functions on a single trip in a well bore.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: January 18, 2011
    Assignee: Specialised Petroleum Services Group Limited
    Inventor: George Telfer
  • Publication number: 20100243257
    Abstract: In some embodiments, apparatus useful for cleaning at least part of the interior surface of a cylindrically-shaped member disposed in a subterranean well includes a housing and a plurality of retractable mill blades supported on the housing. The mill blades of such embodiments are capable of cleaning the entire circumference of the interior surface of at least a portion of the cylindrically-shaped member upon reciprocation of the housing.
    Type: Application
    Filed: March 26, 2009
    Publication date: September 30, 2010
    Applicant: BJ Service Company
    Inventors: George N. Krieg, David Hebert, Graham J. Duplantis
  • Patent number: 7798226
    Abstract: A cement diffuser and method for allowing a ported tubular to be cemented in place, while keeping an annulus about a port of the ported tubular generally free of set cement. The cement diffuser includes a collection of fibers secured over the port and extending out from an outer surface of the tubular.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: September 21, 2010
    Assignee: Packers Plus Energy Services Inc.
    Inventor: Daniel Jon Themig
  • Patent number: 7740073
    Abstract: A wellhead seal unit for sealing a subsea oil and/or gas well at the wellhead. The unit comprises a sleeve, sealingly engaged to the workstring and to which, blow out preventer rams can engage. The unit allows the workstring to be rotated and reciprocated within the wellbore without releasing the seal. Methods of cleaning the sealed well and performing an inflow test are described.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: June 22, 2010
    Assignee: Specialised Petroleum Services Group Limited
    Inventor: Paul David Howlett
  • Publication number: 20100032154
    Abstract: An assembly for cleanout of scale buildup from a wall of a hydrocarbon well. The assembly is configured to be deployed and operated under pressure without the requirement of coiled tubing to deliver cleanout fluid. The assembly may include a plug for sealing against the wall of the well immediately above the location of scale buildup. A cleanout tool, such as a jetting nozzle may be coupled to the downhole side of the plug. Thus, fluid and pressure may be provided to the well uphole of the plug. In this manner, the plug may direct the fluid to the jetting nozzle to achieve cleanout of the scale buildup.
    Type: Application
    Filed: August 6, 2008
    Publication date: February 11, 2010
    Inventor: Peter Gillan
  • Publication number: 20090218092
    Abstract: A downhole cleaning tool comprising: a substantially cylindrical body; at least one cleaning member extending from the cylindrical body and being movable between a retracted position and an active position in which the cleaning member is positioned to clean an internal surface of the well bore; and switching means adapted to receive a force applied in a first direction and responsively move the at least one cleaning member from the retracted position to the active position.
    Type: Application
    Filed: September 4, 2008
    Publication date: September 3, 2009
    Inventor: RICHARD K. BOOTH
  • Patent number: 7559374
    Abstract: A cleaning tool and method of cleaning a liner top in a well bore. The tool includes cleaning elements, typically scrapers, which are arranged eccentrically to an axial bore through the tool. The elements are biased outwardly to contact an inner surface of a polished bore receptacle (PBR) at a position with a curvature to match the PBR and to present leading edges of each element when positioned at a surface of a neighboring casing. The tool may further provide a top dress mill and act as a packer actuator sub. This provides a tool which performs a number of functions on a single trip in a well bore.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: July 14, 2009
    Assignee: Specialised Petroleum Services Group Limited
    Inventor: George Telfer
  • Publication number: 20090025927
    Abstract: This invention relates to well cleaning methods and apparatus. In particular, this invention relates to a method of drilling and cleaning a wellbore. In one embodiment of the invention, a method of drilling and cleaning a wellbore (12) is disclosed. The method comprises the steps of providing a drill string (10) having a drill bit (28) and a cleaning tool (24) with selectively activatable cleaning members (34); drilling a wellbore using the drill bit while maintaining the cleaning members in a deactivated position; and pulling the drill string from the wellbore with the cleaning members in an activated position, to thereby clean the wellbore. A corresponding cleaning tool is also disclosed.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 29, 2009
    Applicant: SPECIALISED PETROLEUM SERVICES GROUP LIMITED
    Inventor: George Telfer
  • Patent number: 7467671
    Abstract: A method is provided for removing a body of selected material from the interior of a casing extending into a borehole formed in an earth formation. The method comprises lowering a drill bit for further drilling of the borehole, into the casing, the drill bit having a longitudinal axis of rotation during operation, the drill bit comprising rock cutting means, at least one protection member for protecting the inner surface of the casing from contact with the rock cutting means, each protection member being adapted to remove said selected material from the interior of the casing and being radially movable towards the inner surface of the casing, and control means for applying a radially outward force of controlled magnitude to the protection member. The drill bit is rotated in the casing, and the control means is operated so as to apply said radially outward force of controlled magnitude to the protection member.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: December 23, 2008
    Assignee: Shell Oil Company
    Inventors: Jean-Michel Claude Gaston Savignat, Djurre Hans Zijsling
  • Patent number: 7121343
    Abstract: A downhole cleaning tool (10) for oil and gas wells. Brushes, scraper, wipers (32) and the like are mounted on a sleeve (14) over a tubular body (12), and the members successively moved towards and away from an inner surface of a tubular to be cleaned. Movement is created by a jarring action on the tool with the sleeve traveling over undulating profiles (26) on the body to actuate the cleaning members. The tool may be deployed on a slickline or wireline.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: October 17, 2006
    Assignee: Specialised Petroleum Services Group Limited
    Inventor: George Telfer
  • Patent number: 6758275
    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: Grant
    Filed: August 16, 2002
    Date of Patent: July 6, 2004
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Burt Martin
  • Patent number: 6679325
    Abstract: A centralizer apparatus for centralizing tubular casing in a borehole having two stop collars for securing to the casing in a spaced apart relationship and two moving collars, one slidably and rotatably coupled to each stop collar, a plurality of bow springs, each bow spring having a first end spaced apart from a second end, each bow spring biased outwardly from the center axis, the first ends connected to the first moving collar, the second ends connected to the second moving collar.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: January 20, 2004
    Assignee: Frank's International, Inc.
    Inventor: Jean Buytaert
  • Publication number: 20020108749
    Abstract: A transducer provides (a) increased magnitudes of vibrations without cracking and (b) increased power to the transducer, in response to alternating voltages, for producing transducer vibrations with increased magnitudes. A polycrystalline ceramic (e.g. polycrystalline lead titanate or polycrystalline lead zirconate) has a looped configuration with a gap and has properties of vibrating upon an introduction of an alternating voltage, preferably rich in harmonies, to the ceramic. The ceramic is cryogenically treated as by initially reducing its temperature to approximately −100° C., then disposing the ceramic in liquid nitrogen and thereafter gradually increasing its temperature to approximately room temperature. This increases the dielectric strength of the ceramic by prestressing the ceramic, thereby providing for the ceramic to receive increased voltages without cracking. An alternating voltage rich in harmonics (e.g. square wave voltage) may be applied to the ceramic.
    Type: Application
    Filed: February 12, 2001
    Publication date: August 15, 2002
    Inventor: Harry W. Kompanek
  • Patent number: 6152221
    Abstract: Apparatus for cleaning the inside walls of a pipeline, well casing or other tubing, comprises a supporting structure upon which are supported one or more cleaning members, and retraction means for controllably retracting the cleaning members so as to avoid their contact with the aforesaid tubing when desired. The apparatus is also provided with a sleeve to effect contact between the retractable cleaning members and the pipeline, well casing or other tubing. Typically, the apparatus is provided in the form of a well cleanup tool.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: November 28, 2000
    Assignee: Specialised Petroleum Services Limited
    Inventors: Mark Carmichael, Paul Howlett
  • Patent number: 6070677
    Abstract: An apparatus for enhancing production from a wellbore hole may include a body member having at least one cutting assembly. Each cutting assembly may have an upper, middle, and lower cutting arm. The cutting arms are hingedly connected to one another. An upper end of each upper cutting arm is hingedly connected to the body member. A lower end of each lower cutting arm is hingedly connected to a corresponding beveled attachment that is slidably received within a corresponding beveled groove in the body member. The body member includes an interior longitudinal bore in fluid communication with a jet nozzle that is located beneath each cutting assembly. The apparatus is connected to a drill string. As the drill string is rotated, each cutting assembly is moved to a fully-deployed position under centrifugal force, thereby enlarging the wellbore hole. Drilling fluid may be pumped into the apparatus to generate hydraulic power to carry loose cuttings to the surface.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: June 6, 2000
    Assignee: I.D.A. Corporation
    Inventor: Hugh L. Johnston, Jr.
  • Patent number: 5351758
    Abstract: A method and apparatus for reaming foreign deposits from the flow passage of well production tubing and cleaning deposits from the completion profiles within the tubing as well as for drifting the production tubing while located within a well bore. A reaming tool is extended through the tubing string and is rotated for reaming operations. A plurality of reaming dogs of the tool are selectively and radially expanded to tubing and tubing completion profile reaming positions by cams of a hydraulically operated linearly removable actuator mandrel. The actuator mandrel is spring-urged toward a position permitting spring-urged retraction of the reaming dogs so that the reaming tool may be introduced into or withdrawn from the tubing string by linear movement.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: October 4, 1994
    Assignee: Pacific Well Services Ltd.
    Inventors: Michael Henderson, Dale O. Tupper
  • Patent number: 5348086
    Abstract: A combination clean-out and fishing tool for use under rotary power in a well bore. The tool is adapted for connection to the drill string by means of an elongated connector sub. The connector sub then carries a cylindrical sleeve thereon which houses a cylindrical hub secured within the sleeve by means of shear pins. A cylindrical extension then secures below the cylindrical sleeve to support a clean-out tool of selected type therebelow while the hub and extension sub carrying a selected fishing tool are inside the cylindrical extension. After rotary operation of the clean-out tool to expose the fish, sufficient weight jarring the drill stem shears the shear pins to lower the connector sub, hub, extension sub and fishing tool into rotary engagement with the fish.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: September 20, 1994
    Inventor: Randall L. Trout
  • Patent number: 5168929
    Abstract: An oil well tool and method for its use for removing accumulated deposits along an oil well tubing in a downhole pump operated oil well is disclosed. The tool when in use is untethered and adapted to be lowered through an oil well tubing under its own weight and the forces of gravity. The tool includes: a heating and scraping portion that removes the deposits as the tool is lowered through the tubing, a set of seals for preventing pumped fluids from passing through or around the tool, and a mechanism for setting the seals at a desired location along the tubing. With the seals set and the pump operating, the tool is raised up through the well tubing with the pumped fluids to a wellhead storage position.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: December 8, 1992
    Inventor: Dale R. Galloway
  • Patent number: 5076365
    Abstract: A clean-out tool system for use with a oil well production tubing extending downward through a casing terminating in a production zone in the well bore, which zone is isolated by a packer and includes flow restricting debris to be cleaned out. A generally vertical, elongated, cylindrical tool body, having a relatively small diameter and a bore therein, is located down through the inner production tubing into the zone located at the end of a tubing string extending downward through the production tubing for communicating fluid pressure to the bore in the body. Four, peripherally spaced, elongated slots extend radially inward into the body with their longitudinal axes aligned with the longitudinal axis of the body and communicate with the bore is the body. An elongated blade is pivotally attached in each slot to the body, movable from a first configuration wherein the blade is positioned vertically within the slot, and a second, expanded configuration positioned radially outward in the zone.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: December 31, 1991
    Assignee: Charles D. Hailey
    Inventor: Robert L. Jenkins
  • 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: 4892145
    Abstract: A well casing cleaning assembly includes a cylindrical mandrel in which a spiral arrangement of transverse drillings is formed each of the drillings receiving a coiled spring intermediate the bases of exteriorly projecting knife blades. A set of arcuate plate segments, provided with vertical slots at each of the drillings, is then secured to the exterior of the mandrel compressing the springs and exposing the blade ends. An upper and lower packing on the mandrel then confines pressurized cleaning fluid.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: January 9, 1990
    Inventor: Lawrence R. Stafford
  • Patent number: 4842082
    Abstract: An apparatus for use in energy exploration is disclosed which is used where a radially expanding device is required, for example in a stabilizer, retriever or an underreamer. The apparatus comprises a support tubular member for connection to a drilling string, the member supporting a movable member which is axially movable along the member. A further member which may either be fixedly secured or also axially movable along the member is axially spaced from the movable member. The movable member and, optionally, the further member have tapered outer surfaces which cooperate with a taper on a radially movable member. The arrangement is such that movement of the movable member in the axial direction is such that the cooperating tapers cause the radially movable member to expand or contact in the radial direction. Various means for securing and performing radial movement are disclosed.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: June 27, 1989
    Assignee: Smith International (North Sea) Limited
    Inventor: Johann Springer
  • Patent number: 4838354
    Abstract: A clean-out tool system for use with a oil well production tubing extending downward through a casing terminating in a production zone in the well bore, which zone is isolated by a packer and includes flow restricting debris to be cleaned out. A generally vertical, elongated, cylindrical tool body, having a relatively small diameter and a bore therein, is located down through the inner production tubing into the zone located at the end of a tubing string extending downward through the production tubing for communicating fluid pressure to the bore in the body. Four, peripherally spaced, elongated slots extend radially inward into the body with their longitudinal axes aligned with the longitudinal axis of the body and communicate with the bore in the body. An elongated blade is pivotally attached in each slot to the body, movable from a first configuration wherein the blade is positioned vertically within the slot, and a second, expanded configuration positioned radially outward in the zone.
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: June 13, 1989
    Assignee: C. "Jerry" Wattigny
    Inventor: Robert L. Jenkins
  • Patent number: 4809779
    Abstract: An arrangement for cleaning the internal surface of casing strings, comprises a hollow cylindrical body with slots provided around the periphery thereof. The slots accommodate extendable cutting blades. The cutting blades are moved with the aid of walls of an elastic vessel. The elastic vessel is disposed inside the body and adapted to be communicated with a source of compressed fluid medium. The elastic vessel is disposed in a bushing installed coaxially with the body and provided with longitudinal ports. The ports are arranged opposite to the slots of the body and are equipped with flat spring elements. The flat spring elements substantially completely cover the ports of the bushing and cooperate by one side with the cutting blades and by the other side, with the elastic vessel.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: March 7, 1989
    Assignee: Vsesojuzny Nauchno-Issledovatelsky Institut Pokrepleniju Skvazhin I Burovym Rastvoram
    Inventors: Oleg A. Ledyashov, Stanislav F. Petrov, Stanislav P. Goryainov, Mark L. Kiselman, Anatoly M. Laptev, Viktor I. Mishin
  • Patent number: 4706748
    Abstract: A device for scraping the inside of pipes clogged with foreign materials is comprised of (1) a mandrel having a conical cam whose top is attached to a mechanical power source and around which is mounted (2) a plurality of annularly expandable scraper elements whose combined outside configuration approximates a tube which can be inserted into the pipe, and whose combined inside configuration approximates an expandable, conical dome into which the mandrel's conical cam is pulled in order to annularly expand the elements of the conical dome and hence expand the plurality of scraper elements as the entire device is pulled through the pipe and (3) means for limiting the annular expansion of the scraper elements.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: November 17, 1987
    Assignee: IMD Corporation
    Inventor: Kim A. Harris
  • Patent number: 4671355
    Abstract: A wash tool for stimulating oil wells having brushes and/or blades mounted to retractable tool blocks, whereby the brushes or blades can be introduced in the well out of contact with the well liner, and thereafter extended into contact with the liner.
    Type: Grant
    Filed: August 14, 1985
    Date of Patent: June 9, 1987
    Inventor: Mark D. Strange
  • 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: 3981364
    Abstract: Apparatus for use in removing paraffin from a well tubing string above a wireline operated subsurface safety valve assembly installed in the tubing string and its method of operation. The safety valve assembly controls the flow of production oil and/or gas fluids through the tubing string. During normal production operations a wireline connects the paraffin cutting apparatus to surface facilities which include apparatus for maintaining sufficient tension on the wireline to hold the safety valve assembly in open position and for releasing tension on the wireline to permit the safety valve assembly to close. The paraffin cutter apparatus contains means for releasably connecting it to the safety valve assembly. Manipulation of the wireline actuates means on the paraffin cutting apparatus to open an equalizer port in the tubing string. Paraffin cut from the tubing string wall is removed by flow of production fluids through the open equalizer port.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: September 21, 1976
    Assignee: Exxon Production Research Company
    Inventors: Darrell G. Warner, William D. Loth