Bow Spring Type Patents (Class 166/172)
  • Patent number: 9664327
    Abstract: The invention relates to a device for rehabilitating pipelines, having a support structure (10) to which functional units of the device can be fastened, wherein the support structure (10) has at least two support structure elements (12, 16, 19) which reconnected to one another via at least one buckling mechanism (20). By means of the buckling mechanism (20), at least one support structure element (12, 16, 19) can be placed into a buckled position. Furthermore, an actuating device (30) is provided which is designed such that the buckling mechanism (20) can be placed into a buckling enable position and a buckling blocking position by means of the actuating device (30).
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: May 30, 2017
    Assignee: TRELLEBORG PIPE SEALS DUISBURG GMBH
    Inventor: Andreas Bichler
  • 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: 7878238
    Abstract: A cleaning apparatus for cleaning the inner surface of an oil or gas production tubing is disclosed. The cleaning apparatus includes a tubular body, one or more cleaning elements mounted on the outer surface of the body and an elastically deformable stabiliser. The elastically deformable stabiliser is rotatably mounted on the body to centralise the apparatus in the tubing whilst also allowing the body to pass though areas of reduced diameter in the production tubing. Preferably, there are a pair of spaced apart stabilisers having a web arrangement of spars with a flange at each end.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: February 1, 2011
    Assignee: Rotary Drilling Supplies Europe Limited
    Inventor: Ronald Potter
  • 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: 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
  • Publication number: 20090255665
    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: Application
    Filed: June 29, 2009
    Publication date: October 15, 2009
    Applicant: SPECIALISED PETROLEUM SERVICES GROUP LIMITED
    Inventor: George Telfer
  • 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: 20040226714
    Abstract: A limit clamp for securing a tool to a casing having a groove in its outer surface. The limit clamp comprises a block having a base and a flange. The base is positioned in the groove to contact at least one stop in the groove and the flange extends out of the groove. The limit clamp also comprise a lock ring encircling the block and the casing, wherein the lock ring engages the block.
    Type: Application
    Filed: May 14, 2003
    Publication date: November 18, 2004
    Inventors: Henry E. Rogers, Earl D. Webb
  • Publication number: 20040112592
    Abstract: A centralizer for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided with bow springs that compress to a minimal diameter around the outer diameter of the sub to which the centralizer is concentrically mounted when compressive force is applied to the bow springs to facilitate insertion of the centralizer into restricted openings and/or flow control or wellhead equipment. The minimal diameter of the centralizer is provided by mounting the bow springs to a reduced diameter portion of the collar that is mounted to the sub, and even greater reduction in diameter is achieved by mounting the bow springs in notches formed in the reduced diameter portion of the collar.
    Type: Application
    Filed: November 21, 2003
    Publication date: June 17, 2004
    Applicant: CaseTech International, Inc.
    Inventor: Maximillian S. Gremillion
  • Patent number: 6749019
    Abstract: An automatic paraffin removal unit, including a scraper body, a tumbler, an arc spring leaf and a return torque spring, and the upper and lower commutators having a sleeve, an open spacing ring and a tower spring. In operation, the scraper is clamped on a pumping rod, while the upper, lower commutators are respectively connected to the upper, lower ends of the tubing section from the well head to the section having toe temperature lower than paraffin deposition temperature requiring paraffin removal. The scraper moves up and down following the pumping rod via unidirectional upward or downward movement, paraffin removal being performed to the inner wall of tubing and pumping rod unceasingly, and variations in direction being performed in the upper, lower commutators.
    Type: Grant
    Filed: January 7, 2002
    Date of Patent: June 15, 2004
    Inventor: Xiaoyan Liu
  • Publication number: 20030070803
    Abstract: A dual diameter centralizing sub for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided with bow springs that compress into grooves between radially outwardly-extending vanes that are spaced around the outer diameter of the sub when compressive force is applied to the bow springs. The vanes extend radially outwardly far enough that the effective diameter of the sub in the area of the vanes is greater than the diameter of the sub and/or the tubing to which it is mounted to provide stand-off even under conditions in which the bow springs are fully compressed while still maintaining fluid flow.
    Type: Application
    Filed: November 23, 2002
    Publication date: April 17, 2003
    Applicant: CaseTech International, Inc.
    Inventor: Maximillian S. Gremillion
  • Patent number: 6457519
    Abstract: A centralizer for laterally positioning an instrument in an opening larger in diameter than the diameter of an opening through which the centralizer can freely pass. The centralizer includes spring blades affixed at one end to an outer surface of the instrument and extending axially to a stop collar rotatably positioned on the outer surface of the instrument. A latch is operatively coupled to the stop collar and is adapted to enable rotation of the stop collar about the instrument upon release of the latch.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: October 1, 2002
    Assignee: Antelope Oil Tool and Manufacturing Company, Inc.
    Inventor: Jean P. Buytaert
  • Publication number: 20020112853
    Abstract: A centralizer is disclosed for laterally positioning an instrument in an opening larger in diameter than the diameter of an opening through which the centralizer can freely pass. The centralizer includes spring blades affixed at one end to an outer surface of the instrument and extending axially to a stop collar rotatably positioned on the outer surface of the instrument. A latch is operatively coupled to the stop collar and is adapted to enable rotation of the stop collar about the instrument upon release of the latch.
    Type: Application
    Filed: February 20, 2001
    Publication date: August 22, 2002
    Inventor: Jean P. Buytaert
  • 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: 5358039
    Abstract: The centralizer comprises a main assembly suitable for centering a well tool in casing, and a removable adapter assembly (75) for use in the open hole portion of a borehole. The main assembly comprises a body (30), longitudinally spaced-apart supports (36, 41) slidably mounted on the body, and pairs of hinged arms (45.sub.1, 47.sub.1) disposed between the slidable supports. The central hinges (50.sub.1) of the pairs of arms carry wheels (51.sub.1) and are spaced apart laterally from the body under the effect of blade springs (52.sub.1, 53.sub.1). The adapter assembly (75) comprises curved spring blades (80.sub.1) hinged on link collars (77, 82) removably fixed on the sliding supports. The wheels are laterally spaced apart from the spring blades. The centralizer is easily modified to operate either in the case hole portion or in the open hole portion of a borehole.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: October 25, 1994
    Assignee: Schlumberger Technology Corporation
    Inventor: Hugh E. Fordham
  • Patent number: 4557327
    Abstract: A roller arm centralizer to center a drill string in a well pipe. The arms of the roller arm centralizer include shoulders to limit movement of the arms in the direction of the centralizer body which prevents the arms from being locked in a straight line adjacent to the centralizer body. The shoulders also prevent the arms from being forced into an undesired configuration; wherein one arm is parallel to the body and the other two arms form a "V", by an abrupt decrease in the bore diameter. The roller arm centralizer remains operative when passing through relatively narrow sections of well pipe or through well pipe having abrupt changes in diameter.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: December 10, 1985
    Assignee: J. C. Kinley Company
    Inventors: Karl S. Kinley, Allyn R. Pratt
  • Patent number: 4531582
    Abstract: A conduit centralizer comprises segmented, sliding means connected by a plurality of axially extending, outwardly bowed leaf springs. Each sliding means is formed by the hinged connection of a plurality of double walled segments. The ends of the leaf springs are respectively inserted within the double walled segments and welded to both the inner and outer walls of the segments, thus providing an extremely rigid structure which is fabricated without machining operations.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: July 30, 1985
    Assignee: Baker Oil Tools, Inc.
    Inventors: John F. Muse, Harry W. Riddle, Frank S. Zeiler, Juventino Buruato
  • Patent number: 4520869
    Abstract: A centralizer for a well casing, and the method of producing a centralizer, for assembly in the field. The centralizer comprises two collars and a plurality of spring bows, with a bow receiving section in each collar for each bow. Aligned channels are formed in the collar defining a passage for receiving a bow end, and each bow end has a hat section for positioning in the aligned channels. After a bow end is inserted in a collar passage, one of the channels is compressed into the bow hat section to lock the bow in place.
    Type: Grant
    Filed: September 29, 1983
    Date of Patent: June 4, 1985
    Inventor: Bert N. Svenson