GB1364054A - Centring devices for locating instruments axially within tubular enclosures - Google Patents

Centring devices for locating instruments axially within tubular enclosures

Info

Publication number
GB1364054A
GB1364054A GB1421471A GB1421471A GB1364054A GB 1364054 A GB1364054 A GB 1364054A GB 1421471 A GB1421471 A GB 1421471A GB 1421471 A GB1421471 A GB 1421471A GB 1364054 A GB1364054 A GB 1364054A
Authority
GB
United Kingdom
Prior art keywords
arms
cylinder
camera
tube
well
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
GB1421471A
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.)
REES INSTR Ltd
REES Ltd WILLIAM F
Original Assignee
REES INSTR Ltd
REES Ltd WILLIAM F
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 REES INSTR Ltd, REES Ltd WILLIAM F filed Critical REES INSTR Ltd
Priority to GB1421471A priority Critical patent/GB1364054A/en
Publication of GB1364054A publication Critical patent/GB1364054A/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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
    • E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (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

1364054 Wells and &c WILLIAM F REES Ltd and REES INSTRUMENTS Ltd 11 May 1972 [11 May 1971] 14214/71 Heading E1F A device for centring an instrument (such as a television camera 17) in a tubular enclosure (such as a well) comprises a body 1 for holding the instrument, two sets of pivotal locating arms 4, 7, and remotely controlled means for causing equi-angular pivotal movement of the arms of each set between an inoperative position substantially parallel with the body to an operative position in which they extend outwardly at an angle to the body to contact the wall of the enclosure. The device is lowered through a plastics tube into the well on a cable 20 connected to the camera and a tube 39 connected to the rod 261 of a piston 26 over which slides a cylinder 8 urged by a spring 41 to the position shown. The arms 4 are pivoted to the body, the arms 7 are pivoted to the cylinder, and the arms are connected by links 5, 10 so that fluid supplied by the tube 39 moves the cylinder against the spring and engages wheels 12 on the arms with the wall of the well to centre the camera. In a modification (Figs. 7, 7a not shown) the extended arms are all inclined towards the camera so that should the arms fail to retract it might be possible to force the arms to retract by pulling the device through the mouth of the plastics tube through which it must pass to reach the surface. The piston and cylinder may be replaced by a screw and nut, or by coaxial cables.
GB1421471A 1972-05-11 1972-05-11 Centring devices for locating instruments axially within tubular enclosures Expired GB1364054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1421471A GB1364054A (en) 1972-05-11 1972-05-11 Centring devices for locating instruments axially within tubular enclosures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1421471A GB1364054A (en) 1972-05-11 1972-05-11 Centring devices for locating instruments axially within tubular enclosures

Publications (1)

Publication Number Publication Date
GB1364054A true GB1364054A (en) 1974-08-21

Family

ID=10037119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1421471A Expired GB1364054A (en) 1972-05-11 1972-05-11 Centring devices for locating instruments axially within tubular enclosures

Country Status (1)

Country Link
GB (1) GB1364054A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431023A1 (en) * 1978-07-15 1980-02-08 Bergwerksverband Gmbh MEASUREMENT INSTALLATION FOR BOREHOLE
GB2237830A (en) * 1989-10-26 1991-05-15 Baker Hughes Inc Releasable well tool stabilizer
GB2328230A (en) * 1997-08-07 1999-02-17 Computalog Limited Centralizers for a downhole tool
WO2009115802A1 (en) * 2008-03-18 2009-09-24 Petrowell Ltd Improved centraliser
US8490691B2 (en) 2004-10-29 2013-07-23 Petrowell Limited Plug
US8555964B2 (en) 2007-12-03 2013-10-15 Petrowell Limited Centraliser
US8651178B2 (en) 2006-03-23 2014-02-18 Petrowell Limited Packer
US8678099B2 (en) 2004-06-11 2014-03-25 Petrowell Limited Sealing system
US8689864B2 (en) 2007-06-20 2014-04-08 Petrowell Limited Activation device
US8839872B2 (en) 2006-11-17 2014-09-23 Petrowell Limited Tree plug
US9133968B2 (en) 2008-03-29 2015-09-15 Petrowell Limited Tubing section coupling
US9194213B2 (en) 2005-04-09 2015-11-24 Petrowell Limited Packer
US9702231B2 (en) 2008-02-21 2017-07-11 Petrowell Limited Tubing section
CN108204215A (en) * 2017-12-18 2018-06-26 中国石油天然气股份有限公司 Instrument draw gear and logging system
CN110714751A (en) * 2019-10-25 2020-01-21 中南大学 Centering device of drilling imager

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431023A1 (en) * 1978-07-15 1980-02-08 Bergwerksverband Gmbh MEASUREMENT INSTALLATION FOR BOREHOLE
GB2237830A (en) * 1989-10-26 1991-05-15 Baker Hughes Inc Releasable well tool stabilizer
GB2237830B (en) * 1989-10-26 1993-02-03 Baker Hughes Inc Releasable well tool stabilizer
GB2328230A (en) * 1997-08-07 1999-02-17 Computalog Limited Centralizers for a downhole tool
US8678099B2 (en) 2004-06-11 2014-03-25 Petrowell Limited Sealing system
US8973666B2 (en) 2004-10-29 2015-03-10 Petrowell Limited Running adapter
US8490691B2 (en) 2004-10-29 2013-07-23 Petrowell Limited Plug
US9194213B2 (en) 2005-04-09 2015-11-24 Petrowell Limited Packer
US8651178B2 (en) 2006-03-23 2014-02-18 Petrowell Limited Packer
US9562411B2 (en) 2006-03-23 2017-02-07 Petrowell Limited Packer
US8839872B2 (en) 2006-11-17 2014-09-23 Petrowell Limited Tree plug
US8689864B2 (en) 2007-06-20 2014-04-08 Petrowell Limited Activation device
US8555964B2 (en) 2007-12-03 2013-10-15 Petrowell Limited Centraliser
US9702231B2 (en) 2008-02-21 2017-07-11 Petrowell Limited Tubing section
WO2009115802A1 (en) * 2008-03-18 2009-09-24 Petrowell Ltd Improved centraliser
US8820417B2 (en) 2008-03-18 2014-09-02 Petrowell Limited Centraliser
US9133968B2 (en) 2008-03-29 2015-09-15 Petrowell Limited Tubing section coupling
CN108204215A (en) * 2017-12-18 2018-06-26 中国石油天然气股份有限公司 Instrument draw gear and logging system
CN110714751A (en) * 2019-10-25 2020-01-21 中南大学 Centering device of drilling imager

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees