EP2300683B1 - Greiferbackenvorrichtung - Google Patents

Greiferbackenvorrichtung Download PDF

Info

Publication number
EP2300683B1
EP2300683B1 EP09758575A EP09758575A EP2300683B1 EP 2300683 B1 EP2300683 B1 EP 2300683B1 EP 09758575 A EP09758575 A EP 09758575A EP 09758575 A EP09758575 A EP 09758575A EP 2300683 B1 EP2300683 B1 EP 2300683B1
Authority
EP
European Patent Office
Prior art keywords
pipe
gripping
power tong
deflector
sharp portions
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.)
Active
Application number
EP09758575A
Other languages
English (en)
French (fr)
Other versions
EP2300683A1 (de
Inventor
Olav Olsen
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.)
Mhwirth AS
Original Assignee
Aker MH AS
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 Aker MH AS filed Critical Aker MH AS
Publication of EP2300683A1 publication Critical patent/EP2300683A1/de
Application granted granted Critical
Publication of EP2300683B1 publication Critical patent/EP2300683B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints
    • E21B19/161—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe

Definitions

  • This invention relates to a gripping jaw. More specifically, it relates to a gripping jaw for a power tong where a plurality of gripping jaws are displaceable and provided with a gripping surface comprising relatively sharp portions, the power tong being designed to be able to grip about a pipe.
  • the gripping jaws of the power tongs which are designed to be displaceable towards the pipe and to clamp around the pipe with great force, are often made having replaceable gripping elements which comprise a gripping surface with relatively sharp portions. The purpose of these sharp portions is to ensure that that power tong has good engagement with the pipe during the connecting operation.
  • the sharp portions are often made having optionally split ridges running parallel to the centre axis of the pipe.
  • CA 2 520 927 describes a device for use in power tongs in connection with the screwing together of lengths of pipe and is designed to be able to centre the pipe in the power tong.
  • the centring is obtained with the aid of a combination of V-shaped gripping surfaces on a gripping jaw and a sideways movement of the gripping jaw.
  • WO 01/31165 describes a gripping jaw to be used for holding a pipe, and the gripping elements of the gripping jaw are formed of stud-like elements that are harder than the body of the gripping jaw.
  • WO 98/34004 and US 5060542 disclose gripping arrangements for pipes, as requested in preamble of claim 1.
  • Such a malfunction may result in damage to the pipe or the power tong and hence an interruption of the connecting operation.
  • the object of the invention is to remedy or reduce at least one of the disadvantages of the prior art.
  • clamping jaw for a power tong where a plurality of clamping jaws are displaceable and provided with a gripping surface comprising relatively sharp portions, the power tong being designed to be able to grip about a pipe.
  • the clamping jaw is characterised in that it is provided with a deflector.
  • the deflector is designed to help prevent the pipe from becoming clamped between two gripping jaws before it is substantially centred in the power tong.
  • the deflector can project as far as or farther out than the sharp portions in the direction of displacement of the gripping jaw.
  • the deflector meets the pipe before the sharp portions can engage with the pipe.
  • the deflector may be given a smooth surface to help the pipe to slide on the deflector in the direction of the centre axis of the power tong.
  • the deflector may be elastic or comprise an elastic element. The deflector will thus give and allow the sharp portions to obtain good engagement with the pipe when the pipe is centred in the power tong.
  • Each gripping jaw may be provided with two cooperating deflectors. For example, there may be one deflector arranged on each side of the sharp portions relative to the centre axis of the power tong.
  • the deflector may be spring or hydraulically biased in the direction of displacement of the gripping jaw, whereby the deflector is pushed back in relation to the sharp portions at a predetermined clamping force against the pipe.
  • the provided deflector substantially reduces the danger of a pipe becoming clamped between two gripping jaws before the pipe is centred in the power tong.
  • the reference numeral 1 designates a power tong which comprises a power tong housing 2 and three gripping jaws 6 evenly distributed around the centre axis 4 of the power tong 1.
  • the gripping jaws 6 are arranged in their respective guide 8. See Fig. 2 .
  • the gripping jaws 6 are hydraulically actuated and synchronised, as all gripping jaws 6 being displaced the same distance in and out in the guides 8 relative to the centre axis 4 of the power tong 1.
  • Each gripping jaw 6 is provided with a replaceable gripping element 10, the gripping element 10 being constructed with relatively sharp portions 12 in the form of ridges which, when engaged, run parallel to the centre axis 4. See Fig. 3 .
  • Each gripping jaw 6 is provided with two deflectors 14, one on each side of the sharp portions 12.
  • the deflector 14 comprises a smooth metal band 16 which projects slightly out from the sharp portions 12, and an elastic rubber-like material 18.
  • the elastic material 18 is arranged between the metal band 16 and the gripping jaw 6.
  • the metal band 18 is secured to the gripping jaw 6 by screw bolt connections 20.
  • Fig. 1 there is a pipe 22 in the power tong 1.
  • the pipe 22 in Fig. 1 is clamped between two gripping jaws 6 that are not provided with deflectors 14.
  • the centre axis 24 of the pipe 22 in this case is a substantial distance from the centre axis 4 of the power tong 1.
  • the pipe 22 will thus be turned eccentrically when the power tong 1 is turned, and will also very probably be pulled loose from the sharp portions 12 when a torque is to be transmitted from the power tong 1 to the pipe 22.
  • the pipe 22 will, when the deflectors 14 comes into contact with the pipe 22, slide against the metal band 16 and be centred in the power tong 1 before the sharp portions 12 engage with the pipe 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Supports For Pipes And Cables (AREA)
  • Table Equipment (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Clamps And Clips (AREA)
  • Earth Drilling (AREA)

Claims (4)

  1. Greiferbackenvorrichtung (6) für eine Antriebszange (1), bei welcher eine Mehrzahl von Greiferbacken (6) verstellbar sind und mit einer Greiferfläche bereitgestellt sind, welche relativ scharfkantige Abschnitte (12) enthält, wobei die Antriebszange (1) derart entworfen ist, in der Lage zu sein, um ein Rohr (22) herum zu greifen,
    dadurch gekennzeichnet, dass die Greiferbacke (6) mit zumindest einem Ablenkelement (14) bereitgestellt ist, welches mit Bezug auf eine Längs-Symmetrieachse (A-A) von den scharfkantigen Abschnitten symmetrisch angeordnet ist, und in die Verstellrichtung der Greiferbacke (6) bis zu den scharfkantigen Abschnitten (12) oder darüber hinaus vorragt, und welches derart entworfen ist, mit dem Rohr (22) in Kontakt zu treten, um es in der Antriebszange (1) zu zentrieren, bevor die scharfkantigen Abschnitte (12) mit dem Rohr in Eingriff gelangen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Ablenkelement (14) ein elastisches Material (18) enthält.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Ablenkelement (14) mit einer glatten Fläche (16) gegen das Rohr (22) bereitgestellt ist.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Greiferbacke (6) mit zwei zusammenwirkenden Ablenkelementen (14) bereitgestellt ist.
EP09758575A 2008-06-05 2009-06-04 Greiferbackenvorrichtung Active EP2300683B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20082639A NO333740B1 (no) 2008-06-05 2008-06-05 Anordning ved klembakke
PCT/NO2009/000208 WO2009148328A1 (en) 2008-06-05 2009-06-04 Gripping jaw device

Publications (2)

Publication Number Publication Date
EP2300683A1 EP2300683A1 (de) 2011-03-30
EP2300683B1 true EP2300683B1 (de) 2012-10-17

Family

ID=41119759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09758575A Active EP2300683B1 (de) 2008-06-05 2009-06-04 Greiferbackenvorrichtung

Country Status (5)

Country Link
EP (1) EP2300683B1 (de)
BR (1) BRPI0913603B1 (de)
CA (1) CA2726916A1 (de)
NO (1) NO333740B1 (de)
WO (1) WO2009148328A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013036141A2 (en) * 2011-09-09 2013-03-14 National Oilwell Varco Norway As An apparatus for determining the radial profile of a pipe and a method for operating same
RU186989U1 (ru) * 2018-08-06 2019-02-12 Общество с ограниченной ответственностью "СБ-Сервис" Устройство зажима трубы

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1046057A (en) * 1965-06-11 1966-10-19 V P Isyskatelsky I Nii Gidropr Pipe-gripping device
DE2726472C3 (de) * 1977-06-11 1981-03-26 Weatherford Oil Tool GmbH, 30855 Langenhagen Rohrzange, insbesondere zum Verdrehen von Futterrohren für Bohrlöcher
US5060542A (en) * 1990-10-12 1991-10-29 Hawk Industries, Inc. Apparatus and method for making and breaking joints in drill pipe strings
GB9701939D0 (en) * 1997-01-30 1997-03-19 Weatherford Lamb Gripping arrangement for gripping casing
US6302410B1 (en) * 1999-10-22 2001-10-16 Earth Tool Company, L.L.C. Rod gripping jaw
US6814149B2 (en) * 1999-11-26 2004-11-09 Weatherford/Lamb, Inc. Apparatus and method for positioning a tubular relative to a tong
CA2520927A1 (en) * 2005-09-23 2007-03-23 Gerald Lesko Pipe gripping ram

Also Published As

Publication number Publication date
CA2726916A1 (en) 2009-12-10
NO333740B1 (no) 2013-09-02
BRPI0913603A2 (pt) 2015-11-24
EP2300683A1 (de) 2011-03-30
NO20082639L (no) 2009-12-07
BRPI0913603B1 (pt) 2019-02-12
WO2009148328A1 (en) 2009-12-10

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