GB1458592A - Pipe extraction apparauts - Google Patents

Pipe extraction apparauts

Info

Publication number
GB1458592A
GB1458592A GB1717174A GB1717174A GB1458592A GB 1458592 A GB1458592 A GB 1458592A GB 1717174 A GB1717174 A GB 1717174A GB 1717174 A GB1717174 A GB 1717174A GB 1458592 A GB1458592 A GB 1458592A
Authority
GB
United Kingdom
Prior art keywords
pipe
rod
gripping
force
support member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1717174A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Gas Corp
Original Assignee
British Gas Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Gas Corp filed Critical British Gas Corp
Priority to GB1717174A priority Critical patent/GB1458592A/en
Publication of GB1458592A publication Critical patent/GB1458592A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/12—Grappling tools, e.g. tongs or grabs
    • E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/06—Accessories therefor, e.g. anchors

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

1458592 Pipe extraction apparatus BRITISH GAS CORP 18 April 1975 [19 April 1974] 17171/74 Heading F2P [Also in Division E1] Apparatus for extracting buried pipes from surrounding material comprises a plurality of gripping devices connected at intervals along a rod, or alternatively a rope or cable, such that the rod can be freely threaded into the pipe and by exerting a force on the rod in one direction the gripping devices can be operated to grip the inner surface of the pipe to enable the pipe to be extracted, while force exerted on the rod in the opposite sense causes the gripping devices to disengage so that the apparatus may be removed from, or repositioned within, the pipe. In a preferred embodiment each gripping device comprises a support member 1 formed with diametrically opposed inclined ramps 2 supporting toothed gripping pieces 3 slidably connected thereto by mutually engaging grooves and tongues formed respectively on the gripping pieces 3 and ramps 2. A resilient plastics actuating means 8 is slidably supported on a cylindrical section 7 of the support member 1 and incorporates external annular ribs 10 and flexible members 11 which abut the gripping pieces 3 such that, when a force is applied to the support member 1, through rod sections 14 interconnecting the gripping devices, in the direction of arrow A in Fig. 2 the ribs 10 slide freely on the inner surface of the pipe and the gripping pieces 3 are in a non-gripping position as in Fig. 2. When, however, a force is exerted on the rod in the direction of arrow B in Fig. 3 the ribs 10 frictionally engage the inner wall of the pipe and the support member 1 moves in the direction of the force having the net effect that the gripping pieces 3 slide along the ramp 2 and grip the pipe wall as in Fig. 3. After extraction a subsequent force on the rod in the direction of arrow A will restore the apparatus to the state shown in Fig. 2 whence it may be repositioned or removed from the pipe.
GB1717174A 1974-04-19 1974-04-19 Pipe extraction apparauts Expired GB1458592A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1717174A GB1458592A (en) 1974-04-19 1974-04-19 Pipe extraction apparauts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1717174A GB1458592A (en) 1974-04-19 1974-04-19 Pipe extraction apparauts

Publications (1)

Publication Number Publication Date
GB1458592A true GB1458592A (en) 1976-12-15

Family

ID=10090527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1717174A Expired GB1458592A (en) 1974-04-19 1974-04-19 Pipe extraction apparauts

Country Status (1)

Country Link
GB (1) GB1458592A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194978A (en) * 1986-09-09 1988-03-23 Coal Ind Extracting broken tubes from boreholes
WO1992015767A1 (en) * 1991-03-08 1992-09-17 Enterra (U.K.) Limited Method for retrieving well casings using an internal gripping device
GB2268771A (en) * 1991-03-08 1994-01-19 Enterra Method for retrieving well casings using an internal gripping device
EP0653584A2 (en) * 1993-11-13 1995-05-17 North West Water Group Plc Apparatus and method for removing piping from the ground
GB2285297A (en) * 1993-11-13 1995-07-05 North West Water Group Plc Extracting pipes
ES2087012A2 (en) * 1992-09-25 1996-07-01 Sade Compagnie Generale De Tra Pipe removal and replacement
WO1998040661A1 (en) * 1997-03-12 1998-09-17 United Utilities Plc Method and apparatus for separating a pipe from a cable
GB2358449A (en) * 1999-10-13 2001-07-25 M P Burke Plc Improvements in and relating to pipe removal/replacement
WO2017182549A1 (en) * 2016-04-21 2017-10-26 Ardyne As Apparatus for removing a section of casing or lining from a well-bore, and methods
CN112081998A (en) * 2020-09-17 2020-12-15 江苏星河集团有限公司 Positioning tool for mounting composite pipe
CN112879661A (en) * 2020-12-31 2021-06-01 中铁十六局集团路桥工程有限公司 Traction device for water supply steel pipe in bypass sleeve and construction method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194978A (en) * 1986-09-09 1988-03-23 Coal Ind Extracting broken tubes from boreholes
GB2194978B (en) * 1986-09-09 1990-01-10 Coal Ind Tube retracting device
WO1992015767A1 (en) * 1991-03-08 1992-09-17 Enterra (U.K.) Limited Method for retrieving well casings using an internal gripping device
GB2268771A (en) * 1991-03-08 1994-01-19 Enterra Method for retrieving well casings using an internal gripping device
GB2268771B (en) * 1991-03-08 1995-01-04 Enterra Method for retrieving well casings using an internal gripping device
ES2087012A2 (en) * 1992-09-25 1996-07-01 Sade Compagnie Generale De Tra Pipe removal and replacement
GB2285297A (en) * 1993-11-13 1995-07-05 North West Water Group Plc Extracting pipes
EP0653584A3 (en) * 1993-11-13 1996-06-05 North West Water Group Plc Apparatus and method for removing piping from the ground.
EP0653584A2 (en) * 1993-11-13 1995-05-17 North West Water Group Plc Apparatus and method for removing piping from the ground
GB2285297B (en) * 1993-11-13 1997-04-16 North West Water Group Plc Apparatus and method for removing piping from the ground
US5653554A (en) * 1993-11-13 1997-08-05 North West Water Group Plc Apparatus for removing piping from the ground
WO1998040661A1 (en) * 1997-03-12 1998-09-17 United Utilities Plc Method and apparatus for separating a pipe from a cable
GB2358449A (en) * 1999-10-13 2001-07-25 M P Burke Plc Improvements in and relating to pipe removal/replacement
WO2017182549A1 (en) * 2016-04-21 2017-10-26 Ardyne As Apparatus for removing a section of casing or lining from a well-bore, and methods
US10907432B2 (en) 2016-04-21 2021-02-02 Ardyne Holdings Limited Apparatus for removing a section of casing or lining from a well-bore, and methods
CN112081998A (en) * 2020-09-17 2020-12-15 江苏星河集团有限公司 Positioning tool for mounting composite pipe
CN112879661A (en) * 2020-12-31 2021-06-01 中铁十六局集团路桥工程有限公司 Traction device for water supply steel pipe in bypass sleeve and construction method

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee