WO2002075101A1 - A device for a mechanized pipe wrench - Google Patents

A device for a mechanized pipe wrench Download PDF

Info

Publication number
WO2002075101A1
WO2002075101A1 PCT/NO2002/000097 NO0200097W WO02075101A1 WO 2002075101 A1 WO2002075101 A1 WO 2002075101A1 NO 0200097 W NO0200097 W NO 0200097W WO 02075101 A1 WO02075101 A1 WO 02075101A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
wrench
drill floor
accordance
pipe wrench
Prior art date
Application number
PCT/NO2002/000097
Other languages
French (fr)
Inventor
Tor Egil Mong
Tommy Johnsen
Original Assignee
Malm Orstad As
Odfjell Services 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 Malm Orstad As, Odfjell Services As filed Critical Malm Orstad As
Publication of WO2002075101A1 publication Critical patent/WO2002075101A1/en

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
    • 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

Definitions

  • This invention regards a mechanized pipe wrench for screwing and unscrewing pipes, especially for use on a drill floor in connection with petroleum production.
  • a well known type has a mechanized wheel-going pipe wrench arranged on a raillike track on the drill floor, which track extends from an inactive storage position to an active position in which the mechanized pipe wrench is positioned concentrically with the axis of the well opening.
  • Positioning a length of pipe in a manner such that its centre line coincides with the centre line of the pipe string may when using known techniques be difficult to carry out. in a satisfactory manner, and may result in damage to the pipe thread.
  • the to-and-fro movement of the mechanized pipe wrench adds to the time it takes to connect and disconnect lengths of pipe.
  • a drill floor is relatively crowded, and it is disadvantageous for a mechanized pipe wrench with its associated track to take up a significant portion of the drill floor area.
  • the object of the invention is to remedy the disadvantages of prior art.
  • a hydraulically driven pipe wrench is raisably and lowerably arranged to be concentric about the centre line of the well.
  • the wrench is movably connected to a frame structure, where the frame structure is connected to the drill floor, preferably via the slips holder in the drill floor.
  • the wrench is raised and lowered by means of e.g. a hydraulic cylinder.
  • the pipe string When a new length of pipe is to be connected to the pipe string, the pipe string is suspended in the drill floor by means of the drill floor slips.
  • the pipe string drive unit and/or lifting tackle is disconnected, and a new length of pipe is positioned over the pipe string.
  • the wrench is raised to the top of the socket of the suspended pipe and clamped to the socket.
  • the guide of the wrench forms a guiding funnel for the lower end portion of the new length of pipe, guiding the length of pipe down towards the upper threaded portion of the pipe string.
  • the wrench When the new length of pipe has been lowered into the suspended pipe string, the wrench is raised and grips the new length of pipe, whereupon it commences rotation and tightens the threaded connection between the pipe string and the new length of pipe to the desired torque.
  • the pipe string is suspended from the drill floor slips, and the torque from the pipe wrench is transferred to the slips holder via the frame structure.
  • P10122de -25.06.2002 is moved down to its inactive position by the drill floor underneath the socket/connection level of the pipe string, so as to be out of the way of other equipment.
  • the device according to the invention is well suited for remote control, as it follows a fixed movement pattern that does not need to be adjusted in accordance with parameters that vary during the operations.
  • the pipe wrench may, together with the frame structure, easily be released from the drill floor slips holder and removed when not required.
  • Figure 1 is a side view of the pipe wrench in the lower, inactive position:
  • Figure 2 is a side view of the pipe wrench in the upper, active position
  • Figure 3 is a plan view of the pipe wrench
  • Figure 4 shows a section II-II through figure 2.
  • reference number 1 denotes a mechanized pipe wrench according to the invention, comprising a frame 2 with
  • P10122de -25.06.2002 a rigidly mounted column 4, a carriage 6 for vertical travel on the column, and a pipe wrench 10 connected to the carriage 6 in a manner so as to be rotatable about an axis 8.
  • a hydraulic cylinder 12 is hinged to the carriage 6 via a cylinder fixing 14, and to the frame 2 via a piston rod fixing 16.
  • the pipe wrench 10 is driven by at least one hydraulic motor 18 with associated gearing 20. The necessary pumping, valve and hose equipment required for operation of the cylinder 12 and the motors 18 is not shown.
  • the mechanized pipe wrench 1 is releasably connected via e.g. bolts 21 to the slips holder 24 of a drill floor 22 provided with slips 25.
  • the upper end portion of a pipe string 26 has a socket/projecture 28 with a female thread (not shown) that is complementary to the male thread (not shown) of a length of pipe 30.
  • the pipe wrench 10 is in its inactive position near the drill floor 22 at a level below the socket/projecture 28 when the socket/projecture 28 is in the connecting position, see figure 1.
  • the cylinder 12 displaces the carriage 6 and thereby the pipe wrench 10 up to an upper, active position, see figure 2.
  • the pipe string 26 is suspended from the slips 25 of the drill floor 22.
  • the lower portion of a length of pipe 30 is positioned over the socket/projecture 28.
  • the wrench 10 is raised to the top of the socket/projecture 28 and clamps around the socket/projecture 28.
  • the guide 32 of the wrench (1) shown only in figure 2, forms a funnel used to guide the threaded portion of the new length of pipe 30 into the
  • the pipe wrench 10 is raised and grips the length of pipe 30, whereupon the gripping jaws of the pipe wrench 10 are rotated, tightening the pipe connection 28, 30 to a desired torque.
  • the torque from the pipe wrench 10 is transferred to the pipe string 26 via the carriage 6, the column 4, the frame 2, the slips holder 24 and the slips 25.
  • the mechanized pipe wrench 1 according to the invention is not removed from the well opening between each connecting operation, thus exhibiting a significantly shorter operating cycle when compared with mechanized pipe wrenches of prior art.
  • the pipe wrench 1 may easily be removed from the drill floor 22, and as such does not occupy any of the limited space on the drill floor 22 when not in use.
  • the functioning of the pipe wrench 1 is well suited for remote control, and may therefore contribute towards realizing the government's goal of remote control for all equipment associated with drilling.

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)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Earth Drilling (AREA)

Abstract

A device for mechanized screwing and unscrewing of pipe strings (26), especially for use on a drill floor (22), in connection with petroleum production, and where a pipe wrench (10), when in the inactive position, is located between the upper end portion of the pipe string (26) and the drill floor (22).

Description

A DEVICE FOR A MECHANIZED PIPE WRENCH
This invention regards a mechanized pipe wrench for screwing and unscrewing pipes, especially for use on a drill floor in connection with petroleum production.
A significant part of the time used when drilling long holes in the ground is spent on aligning lengths of pipe, screwing these together and later unscrewing them, e.g. when the pipes have to taken up in order to replace or repair tools mounted on the lower part of the pipe string.
There are a large number of tools in various forms designed to mechanize and reduce the expenditure of time when connecting and disconnecting pipe lengths . A well known type has a mechanized wheel-going pipe wrench arranged on a raillike track on the drill floor, which track extends from an inactive storage position to an active position in which the mechanized pipe wrench is positioned concentrically with the axis of the well opening.
P10122de -25.06.2002 When a pipe string or a liner is to be joined to a length of pipe, the length of pipe must first be positioned over the pipe string, and its threaded portion must be guided down onto the corresponding threaded portion of the pipe string. The mechanized pipe wrench is then moved up to its active position, tightens the thread, and must then be moved back to its inactive storage position in order to make room for other equipment by the well opening. Most wrenches according to prior art are equipped with a separate back stop connected to the pipe, which takes up the torque from the mechanized pipe wrench. During the joining operation, it is common for the pipe string to be suspended from slips located in the drill floor.
Positioning a length of pipe in a manner such that its centre line coincides with the centre line of the pipe string, may when using known techniques be difficult to carry out. in a satisfactory manner, and may result in damage to the pipe thread. The to-and-fro movement of the mechanized pipe wrench adds to the time it takes to connect and disconnect lengths of pipe.
A drill floor is relatively crowded, and it is disadvantageous for a mechanized pipe wrench with its associated track to take up a significant portion of the drill floor area.
The object of the invention is to remedy the disadvantages of prior art.
PJ0i22rfe-25.0fj.2002 The object is achieved in accordance with the invention by the characteristics stated in the description below and in the appended claims.
According to the invention, a hydraulically driven pipe wrench is raisably and lowerably arranged to be concentric about the centre line of the well. The wrench is movably connected to a frame structure, where the frame structure is connected to the drill floor, preferably via the slips holder in the drill floor. The wrench is raised and lowered by means of e.g. a hydraulic cylinder.
When a new length of pipe is to be connected to the pipe string, the pipe string is suspended in the drill floor by means of the drill floor slips. The pipe string drive unit and/or lifting tackle is disconnected, and a new length of pipe is positioned over the pipe string. The wrench is raised to the top of the socket of the suspended pipe and clamped to the socket. Thus the guide of the wrench forms a guiding funnel for the lower end portion of the new length of pipe, guiding the length of pipe down towards the upper threaded portion of the pipe string. When the new length of pipe has been lowered into the suspended pipe string, the wrench is raised and grips the new length of pipe, whereupon it commences rotation and tightens the threaded connection between the pipe string and the new length of pipe to the desired torque. As mentioned previously, the pipe string is suspended from the drill floor slips, and the torque from the pipe wrench is transferred to the slips holder via the frame structure. When the connection has been completed, the wrench
P10122de -25.06.2002 is moved down to its inactive position by the drill floor underneath the socket/connection level of the pipe string, so as to be out of the way of other equipment.
The device according to the invention is well suited for remote control, as it follows a fixed movement pattern that does not need to be adjusted in accordance with parameters that vary during the operations.
The pipe wrench may, together with the frame structure, easily be released from the drill floor slips holder and removed when not required.
The following describes a non-limiting example of a preferred embodiment illustrated in the accompanying drawings, in which:
Figure 1 is a side view of the pipe wrench in the lower, inactive position:
Figure 2 is a side view of the pipe wrench in the upper, active position;
Figure 3 is a plan view of the pipe wrench; and
Figure 4 shows a section II-II through figure 2.
In the drawings, reference number 1 denotes a mechanized pipe wrench according to the invention, comprising a frame 2 with
P10122de -25.06.2002 a rigidly mounted column 4, a carriage 6 for vertical travel on the column, and a pipe wrench 10 connected to the carriage 6 in a manner so as to be rotatable about an axis 8. A hydraulic cylinder 12 is hinged to the carriage 6 via a cylinder fixing 14, and to the frame 2 via a piston rod fixing 16. The pipe wrench 10 is driven by at least one hydraulic motor 18 with associated gearing 20. The necessary pumping, valve and hose equipment required for operation of the cylinder 12 and the motors 18 is not shown.
The mechanized pipe wrench 1 is releasably connected via e.g. bolts 21 to the slips holder 24 of a drill floor 22 provided with slips 25. The upper end portion of a pipe string 26 has a socket/projecture 28 with a female thread (not shown) that is complementary to the male thread (not shown) of a length of pipe 30. '
The pipe wrench 10 is in its inactive position near the drill floor 22 at a level below the socket/projecture 28 when the socket/projecture 28 is in the connecting position, see figure 1. When the pipe wrench 10 is to be used, the cylinder 12 displaces the carriage 6 and thereby the pipe wrench 10 up to an upper, active position, see figure 2. The pipe string 26 is suspended from the slips 25 of the drill floor 22. The lower portion of a length of pipe 30 is positioned over the socket/projecture 28. The wrench 10 is raised to the top of the socket/projecture 28 and clamps around the socket/projecture 28. Thus the guide 32 of the wrench (1), shown only in figure 2, forms a funnel used to guide the threaded portion of the new length of pipe 30 into the
P10122de -25.06.2002 threaded portion of the socket/projecture 28. The pipe wrench 10 is raised and grips the length of pipe 30, whereupon the gripping jaws of the pipe wrench 10 are rotated, tightening the pipe connection 28, 30 to a desired torque. The torque from the pipe wrench 10 is transferred to the pipe string 26 via the carriage 6, the column 4, the frame 2, the slips holder 24 and the slips 25.
The mechanized pipe wrench 1 according to the invention is not removed from the well opening between each connecting operation, thus exhibiting a significantly shorter operating cycle when compared with mechanized pipe wrenches of prior art. The pipe wrench 1 may easily be removed from the drill floor 22, and as such does not occupy any of the limited space on the drill floor 22 when not in use. The functioning of the pipe wrench 1 is well suited for remote control, and may therefore contribute towards realizing the government's goal of remote control for all equipment associated with drilling.
P10122de -25.06.2002

Claims

C l a i m s
A device for mechanized screwing and unscrewing of pipe strings (26), especially for use on a drill floor (22) in connection with petroleum production, c h a r a c t e r i s e d i n that a pipe wrench
(10), when in the inactive position, is located between the upper end portion of the pipe string (26) and the drill floor (22) .
A device in accordance with Claim 1 , c h a r a c t e r i s e d i n that the pipe wrench
(10) is positioned so as to be substantially concentric about the longitudinal axis of the pipe string (26).
A device in accordance with one or more of the preceding claims, c h a r a c t e r i s e d i n that the pipe wrench (10) is raisable and lowerable, preferably by means of a hydraulic cylinder (12).
A device in accordance with one or more of the preceding claims, c h a r a c t e r i s e d i n that the pipe wrench (10) is coupled to a carriage (6) that may be displaced along a column ( 4 ) , the column ( ) being coupled to an underlying frame ( 2 ) .
A device in accordance with one or more of the preceding claims, c h a r a c t e r i s e d i n that the frame -25.06.2002 (2) is releasably connected to the slips holder (24) in the drill floor (22) .
A device in accordance with one or more of the preceding claims, c h a r a c t e r i s e d i n that the frame (2) is releasably connected to the drill floor (22).
A device in accordance with one or more of the preceding claims, c h a r a c t e r i s e d i n that the wrench (1) is equipped with a guide (32) designed to guide a new length of pipe (30) into the suspended pipe string (26). -25.06.2002
PCT/NO2002/000097 2001-03-07 2002-03-07 A device for a mechanized pipe wrench WO2002075101A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20011151 2001-03-07
NO20011151A NO314463B1 (en) 2001-03-07 2001-03-07 Device by mechanized pliers

Publications (1)

Publication Number Publication Date
WO2002075101A1 true WO2002075101A1 (en) 2002-09-26

Family

ID=19912228

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2002/000097 WO2002075101A1 (en) 2001-03-07 2002-03-07 A device for a mechanized pipe wrench

Country Status (2)

Country Link
NO (1) NO314463B1 (en)
WO (1) WO2002075101A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023505A1 (en) * 2006-05-18 2007-11-22 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Drill has carriage and drill rod drive arranged at carriage and hydraulic cylinder of driving unit is arranged at its end at other clamping unit and is supported at its other end in base area of carriage
DE102007012055A1 (en) 2007-03-13 2008-09-18 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Drilling device, particularly for soil drilling and rock drilling and for drilling arrangement, has rod element and two clamping units for drilling rods, which are arranged at rod element in axially displaced manner
CN101832115A (en) * 2010-04-30 2010-09-15 中国地质大学（武汉） High-torque hydraulic pipe-wrenching machine for wrenching and disassembling outer-flat drilling rod

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339005A1 (en) * 1988-04-19 1989-10-25 Maritime Hydraulics A.S. A torque wrench
WO1998032948A1 (en) * 1997-01-29 1998-07-30 Weatherford/Lamb, Inc. Apparatus and method for aligning tubulars
EP0881352A2 (en) * 1991-11-07 1998-12-02 Stogner Licensing, Ltd. Drill pipe handling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339005A1 (en) * 1988-04-19 1989-10-25 Maritime Hydraulics A.S. A torque wrench
EP0881352A2 (en) * 1991-11-07 1998-12-02 Stogner Licensing, Ltd. Drill pipe handling
WO1998032948A1 (en) * 1997-01-29 1998-07-30 Weatherford/Lamb, Inc. Apparatus and method for aligning tubulars

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023505A1 (en) * 2006-05-18 2007-11-22 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Drill has carriage and drill rod drive arranged at carriage and hydraulic cylinder of driving unit is arranged at its end at other clamping unit and is supported at its other end in base area of carriage
DE102006023505B4 (en) * 2006-05-18 2008-06-05 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Drilling rig and method for creating a borehole in the ground
DE102007012055A1 (en) 2007-03-13 2008-09-18 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Drilling device, particularly for soil drilling and rock drilling and for drilling arrangement, has rod element and two clamping units for drilling rods, which are arranged at rod element in axially displaced manner
DE102007012055B4 (en) * 2007-03-13 2010-10-28 Klemm Bohrtechnik Gmbh Drilling apparatus, in particular for earth and rock drilling, method for making a hole in the ground and drilling arrangement
CN101832115A (en) * 2010-04-30 2010-09-15 中国地质大学（武汉） High-torque hydraulic pipe-wrenching machine for wrenching and disassembling outer-flat drilling rod
CN101832115B (en) * 2010-04-30 2013-04-17 中国地质大学（武汉） High-torque hydraulic pipe-wrenching machine for wrenching and disassembling outer-flat drilling rod

Also Published As

Publication number Publication date
NO20011151L (en) 2002-09-09
NO314463B1 (en) 2003-03-24
NO20011151D0 (en) 2001-03-07

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