WO2007061315A1 - Method and device for positioning a power tong at a pipe joint - Google Patents

Method and device for positioning a power tong at a pipe joint Download PDF

Info

Publication number
WO2007061315A1
WO2007061315A1 PCT/NO2006/000425 NO2006000425W WO2007061315A1 WO 2007061315 A1 WO2007061315 A1 WO 2007061315A1 NO 2006000425 W NO2006000425 W NO 2006000425W WO 2007061315 A1 WO2007061315 A1 WO 2007061315A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe joint
power tong
displaced
pipe
camera
Prior art date
Application number
PCT/NO2006/000425
Other languages
French (fr)
Inventor
Helge-Ruben Halse
Original Assignee
V-Tech 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 V-Tech As filed Critical V-Tech As
Priority to EP06824344.3A priority Critical patent/EP1957748B1/en
Priority to AU2006317785A priority patent/AU2006317785B2/en
Priority to US12/094,767 priority patent/US8065937B2/en
Priority to BRPI0618991-1A priority patent/BRPI0618991B1/en
Priority to CA2630787A priority patent/CA2630787C/en
Priority to EA200801419A priority patent/EA011912B1/en
Priority to CN200680044026XA priority patent/CN101365859B/en
Priority to DK06824344.3T priority patent/DK1957748T3/en
Publication of WO2007061315A1 publication Critical patent/WO2007061315A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B19/165—Control or monitoring arrangements therefor

Definitions

  • This invention regards a method of positioning a power tong at a pipe joint. More particularly, it regards a method of positioning a power tong at the pipe joint of a pipe, where, after the pipe joint has been brought within the working area of a power tong, the power tong must be displaced to a position that corresponds with that of the pipe joint.
  • a camera which may be displaced in parallel with the pipe, and which is linked to a display, is displaced until the image of the pipe joint coincides with a marker.
  • a signal is then transmitted to a control, indicating that the power tong is to be displaced to a position that coincides with the camera and thereby the pipe joint.
  • the control which receives information about the relative positions of the camera and the power tong, is programmed to guide the power tong to said position.
  • the invention also regards a device for implementation of the method.
  • power tongs When screwing together and unscrewing pipe strings, e.g. in connection with drilling in the ground, power tongs are typically used for the actual screwing operation.
  • the positioning of the power tong, which in addition to the actual power tong also comprises a backup tong, at the pipe joint must be relatively accurate to avoid damage to the pipe couplings, and to ensure the success of the screwing operation.
  • a pipe string may for instance consist of drill pipes or casing.
  • pipes also includes other equipment such as drill collars or tool components that are commonly connected into a pipe string.
  • the power tong is guided to the correct position by an operator near the power tong. It is also known to place sensors by the pipe string, the sensors being arranged to indicate to position of the pipe joint, so that the power tong can then automatically be guided to the correct position.
  • the object of the invention is to remedy or reduce at least one of the drawbacks of prior art.
  • a camera which may be displaced in parallel with the pipe, and which is linked to a display, is displaced in the direction of the pipe joint until the image of the pipe joint coincides with a marker.
  • a signal is then transmitted to a control, indicating that the power tong is to be displaced to a position that coincides with the camera and thereby the pipe joint, the control, which receives information about the relative positions of the camera and the power tong, preferably being programmed to guide the power tong to said position.
  • the marker which preferably appears in the display, may be e.g. crosshairs in the display, in the camera optics or an electronically generated marker.
  • the camera which is directed at the pipe string, can be displaced along a guide by means of an actuator.
  • the guide is secured to a point at a fixed height relative to the power tong.
  • the actuator may be an electric motor coupled to a feed screw, or it may be a hydraulic cylinder.
  • the actuator is controlled by a first transducer, preferably via the control .
  • the display which displays an image of the pipe string at the current vertical height of the camera, is placed near the first transducer to allow an operator to operate the first transducer based on what can be seen in the display.
  • the control upon receiving a signal from the first transducer indicating that the camera is in the correct position by the pipe joint, the control will automatically guide the power tong to the desired position by the pipe joint.
  • the method and device of the invention provides a reliable, remote controlled and relatively favourably priced solution for positioning a power tong at a pipe joint.
  • Fig. 1 is a schematic view of a power tong in an idle position, and where a pipe joint is placed inside the working area of the power tong;
  • Fig. 2 is similar to figure 1, but here a camera has been displaced to a position that corresponds with that of the height of the pipe joint, an image of the pipe joint in a connected display coinciding with a marker in the display; and
  • Fig. 3 is a schematic view of the power tong displaced to a position that corresponds with that of the camera, the power tong also being in a desired position relative to the pipe joint.
  • reference number 1 denotes an assembly of a power tong 2 and a backup tong 4 arranged jointly or separately to move vertically along columns 6.
  • the columns 6 are mounted on a pedestal 8, and the entire assembly 1 can be displaced on a drill floor 10.
  • a pipe string 12 extends through the assembly 1.
  • the power tong 2 and the backup tong 4 are arranged to make up and break the pipe joints 14 of the pipe string 12 by the tongs 2, 4 being placed on separate parts of the pipe joint 14 and gripping the pipe as the power tong 2 rotates the upper part of the pipe string 12 in the desired direction while the backup tong 4 holds the other part of the pipe string 12 still.
  • a camera 16 connected to a display 18 by a line 20 is directed at the pipe string 12, the display 18 showing an image of the pipe string 12.
  • the camera 16 can be displaced, preferably in parallel with the pipe string 12, by means of a guide 22.
  • the camera 16 is controlled by a first transducer 24, a programmable control 26 and a motor 28 by means of a feed screw (not shown) .
  • Lines 30 connect the first transducer 24 and the motor 28 to the control 26.
  • the motor 28 is provided with a second transducer 32, which in a manner that is known per se is arranged to deliver a signal to the control 26, so that the control 26 can keep track of the relative position of the camera 16.
  • the control 26 is connected to the power tong 2 and the backup tong 4 via a line 34.
  • the control 26 is arranged to control the displacement of the tongs 2 , 4 along the columns 6, and also to keep track of the relative positions of the tongs 2, 4 by means of signals from a third transducer 36 and a fourth transducer 38.
  • the first transducer 24 When the pipe joint 14 of the pipe string 12 is within the working area of the tongs 2, 4, see figure 1, the first transducer 24 is operated, whereupon the camera 16 is displaced in the direction of the pipe joint 14 until the pipe joint 14, more particularly visible break between the parts of the pipe joint 14, coincides with a marker 40 in the display 18, see figure 2. Then a signal is transmitted to the control 26 via the first transducer 24, instructing the tongs 2, 4 to move, preferably automatically, along the pipe string 12 to a position that corresponds with that of the camera 16. This position coincides with the position of the pipe joint 14; see figure 3 , whereupon a pipe string portion can be uncoupled from a pipe string 12 in a manner that is known per se.

Abstract

A method and device for positioning a power tong (2) at the pipe joint (14) of a pipe string (12), where, after the pipe joint (14) has been brought within the working area of the power tong (2), the power tong (2) must be displaced to a position that corresponds with that of the pipe joint (14), and where a camera (16) which may be displaced in parallel with the pipe (12), and which is linked to a display (18), is displaced until the image of the pipe joint (14) coincides with a marker (40) in the display, whereupon a signal is transmitted to a control (26), indicating that the power tong (2) is to be displaced to a position that corresponds with that of the camera (16) and thereby that of the pipe joint (14).

Description

METHOD AND DEVICE FOR POSITIONING A POWER TONG AT A PIPE JOINT
This invention regards a method of positioning a power tong at a pipe joint. More particularly, it regards a method of positioning a power tong at the pipe joint of a pipe, where, after the pipe joint has been brought within the working area of a power tong, the power tong must be displaced to a position that corresponds with that of the pipe joint. A camera which may be displaced in parallel with the pipe, and which is linked to a display, is displaced until the image of the pipe joint coincides with a marker. A signal is then transmitted to a control, indicating that the power tong is to be displaced to a position that coincides with the camera and thereby the pipe joint. Preferably, the control, which receives information about the relative positions of the camera and the power tong, is programmed to guide the power tong to said position. The invention also regards a device for implementation of the method.
When screwing together and unscrewing pipe strings, e.g. in connection with drilling in the ground, power tongs are typically used for the actual screwing operation. The positioning of the power tong, which in addition to the actual power tong also comprises a backup tong, at the pipe joint must be relatively accurate to avoid damage to the pipe couplings, and to ensure the success of the screwing operation.
A pipe string may for instance consist of drill pipes or casing. In this context, the term pipes also includes other equipment such as drill collars or tool components that are commonly connected into a pipe string.
According to prior art, the power tong is guided to the correct position by an operator near the power tong. It is also known to place sensors by the pipe string, the sensors being arranged to indicate to position of the pipe joint, so that the power tong can then automatically be guided to the correct position.
US document 2005/0 104 583 describes an apparatus for positioning pipe joints by means of so-called eddy current. Position measuring by use of an eddy current field will only provide an approximate position report, due to the relatively "blurred" change in the eddy current field at the approach of the pipe joint.
Safety reasons dictate that preferably, personnel should not be present on the drill floor during the operations in question. Furthermore, sensors have turned out not to be capable of indicating the position of the pipe joint with sufficient accuracy. The reason for this is, among other things , that the sensors can hardly take into account the fact that the pipe components have been repaired or for other reasons have different dimensions.
The object of the invention is to remedy or reduce at least one of the drawbacks of prior art.
The object is achieved in accordance with the invention, by the features stated in the description below and in the following claims.
When positioning a power tong at the pipe joint of a pipe, where, after the pipe joint has been brought within the working area of the power tong, the power tong must be displaced to a position that corresponds with that of the pipe joint, a camera which may be displaced in parallel with the pipe, and which is linked to a display, is displaced in the direction of the pipe joint until the image of the pipe joint coincides with a marker. A signal is then transmitted to a control, indicating that the power tong is to be displaced to a position that coincides with the camera and thereby the pipe joint, the control, which receives information about the relative positions of the camera and the power tong, preferably being programmed to guide the power tong to said position.
The marker, which preferably appears in the display, may be e.g. crosshairs in the display, in the camera optics or an electronically generated marker.
Preferably, the camera, which is directed at the pipe string, can be displaced along a guide by means of an actuator. The guide is secured to a point at a fixed height relative to the power tong. The actuator may be an electric motor coupled to a feed screw, or it may be a hydraulic cylinder. The actuator is controlled by a first transducer, preferably via the control .
The display, which displays an image of the pipe string at the current vertical height of the camera, is placed near the first transducer to allow an operator to operate the first transducer based on what can be seen in the display.
Preferably, upon receiving a signal from the first transducer indicating that the camera is in the correct position by the pipe joint, the control will automatically guide the power tong to the desired position by the pipe joint.
The method and device of the invention provides a reliable, remote controlled and relatively favourably priced solution for positioning a power tong at a pipe joint.
The following describes a non-limiting example of a preferred method and embodiment illustrated in the accompanying drawings, in which:
Fig. 1 is a schematic view of a power tong in an idle position, and where a pipe joint is placed inside the working area of the power tong;
Fig. 2 is similar to figure 1, but here a camera has been displaced to a position that corresponds with that of the height of the pipe joint, an image of the pipe joint in a connected display coinciding with a marker in the display; and
Fig. 3 is a schematic view of the power tong displaced to a position that corresponds with that of the camera, the power tong also being in a desired position relative to the pipe joint.
In the drawings, reference number 1 denotes an assembly of a power tong 2 and a backup tong 4 arranged jointly or separately to move vertically along columns 6. The columns 6 are mounted on a pedestal 8, and the entire assembly 1 can be displaced on a drill floor 10.
A pipe string 12 extends through the assembly 1. Together, the power tong 2 and the backup tong 4 are arranged to make up and break the pipe joints 14 of the pipe string 12 by the tongs 2, 4 being placed on separate parts of the pipe joint 14 and gripping the pipe as the power tong 2 rotates the upper part of the pipe string 12 in the desired direction while the backup tong 4 holds the other part of the pipe string 12 still.
A camera 16 connected to a display 18 by a line 20 is directed at the pipe string 12, the display 18 showing an image of the pipe string 12.
The camera 16 can be displaced, preferably in parallel with the pipe string 12, by means of a guide 22. The camera 16 is controlled by a first transducer 24, a programmable control 26 and a motor 28 by means of a feed screw (not shown) . Lines 30 connect the first transducer 24 and the motor 28 to the control 26.
The motor 28 is provided with a second transducer 32, which in a manner that is known per se is arranged to deliver a signal to the control 26, so that the control 26 can keep track of the relative position of the camera 16.
The control 26 is connected to the power tong 2 and the backup tong 4 via a line 34. The control 26 is arranged to control the displacement of the tongs 2 , 4 along the columns 6, and also to keep track of the relative positions of the tongs 2, 4 by means of signals from a third transducer 36 and a fourth transducer 38.
When the pipe joint 14 of the pipe string 12 is within the working area of the tongs 2, 4, see figure 1, the first transducer 24 is operated, whereupon the camera 16 is displaced in the direction of the pipe joint 14 until the pipe joint 14, more particularly visible break between the parts of the pipe joint 14, coincides with a marker 40 in the display 18, see figure 2. Then a signal is transmitted to the control 26 via the first transducer 24, instructing the tongs 2, 4 to move, preferably automatically, along the pipe string 12 to a position that corresponds with that of the camera 16. This position coincides with the position of the pipe joint 14; see figure 3 , whereupon a pipe string portion can be uncoupled from a pipe string 12 in a manner that is known per se.

Claims

C l a i m s
1. A method of positioning a power tong (2) at the pipe joint (14) of a pipe string (12) , where, after the pipe joint (14) has been brought within the working area of the power tong (2), the power tong (2) must be displaced to a position that corresponds with that of the pipe joint (14), c ha r a c t e r i z e d i n that a camera (16) that can be displaced in parallel with the pipe (12), and which is linked to a display
(18) , is displaced until the image of the pipe joint (14) coincides with a marker (40), whereupon a signal is transmitted to a control (26) , indicating that the power tong (2) is to be displaced to a position that corresponds with that of the camera (16) and thereby the pipe joint (14) .
2. A method in accordance with Claim 1, c h a r a c t e r i z e d i n that the control (26) , which receives information about the relative positions of the camera (16) and the power tong (2), automatically guides the power tong (2) to the correct position.
3. A positioning device for a power tong (2) at the pipe joint (14) of a pipe string (12), where, after the pipe joint (14) has been brought within the working area of the power tong (2) , the power tong (2) must be displaced to a position that corresponds with that of the pipe joint (14), c har a c t e r i z e d i n that the positioning device comprises a camera (16) that can be displaced in parallel with the pipe (12) , which is linked to a display (18) , and which is arranged to be displaced until the image of the pipe joint (14) coincides with a marker (40) in the display (18) , and where a first transducer (24) connected to a control (26) for the power tong (2) is arranged to transmit a signal to the control (26) to displace the power tong (2) to a position that corresponds with that of the pipe joint (14) .
4. A device in accordance with Claim 3, chara c t er i z ed i n that the camera (16) can be displaced by an actuator.
5. A device in accordance with Claim 4, charac ter i z ed in that the camera (16) can be displaced by an electric motor (28) .
6. A device in accordance with Claim 4 , chara c t er i z ed in that the camera (16) can be displaced by a hydraulic cylinder.
PCT/NO2006/000425 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint WO2007061315A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP06824344.3A EP1957748B1 (en) 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint
AU2006317785A AU2006317785B2 (en) 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint
US12/094,767 US8065937B2 (en) 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint
BRPI0618991-1A BRPI0618991B1 (en) 2005-11-25 2006-11-23 METHOD AND DEVICE FOR POSITIONING A MECHANICAL KEY ON A TUBE JOINT
CA2630787A CA2630787C (en) 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint
EA200801419A EA011912B1 (en) 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint
CN200680044026XA CN101365859B (en) 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint
DK06824344.3T DK1957748T3 (en) 2005-11-25 2006-11-23 A method and device for placing a power tong in a pipe joint

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20055576 2005-11-25
NO20055576A NO20055576A (en) 2005-11-25 2005-11-25 Method and device for positioning a forceps at a pipe joint

Publications (1)

Publication Number Publication Date
WO2007061315A1 true WO2007061315A1 (en) 2007-05-31

Family

ID=35529562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000425 WO2007061315A1 (en) 2005-11-25 2006-11-23 Method and device for positioning a power tong at a pipe joint

Country Status (10)

Country Link
US (1) US8065937B2 (en)
EP (1) EP1957748B1 (en)
CN (1) CN101365859B (en)
AU (1) AU2006317785B2 (en)
BR (1) BRPI0618991B1 (en)
CA (1) CA2630787C (en)
DK (1) DK1957748T3 (en)
EA (1) EA011912B1 (en)
NO (1) NO20055576A (en)
WO (1) WO2007061315A1 (en)

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Cited By (5)

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EP2458135A3 (en) * 2010-11-26 2017-04-12 BENTEC GMBH Drilling & Oilfield Systems Method and device for semi-automatic adjustment of a handling device
US9322950B2 (en) 2011-09-29 2016-04-26 Voca As Method and apparatus for finding stick-up height of a pipe or finding a joint between two pipes in a drilling environment
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Also Published As

Publication number Publication date
AU2006317785A1 (en) 2007-05-31
EA011912B1 (en) 2009-06-30
EP1957748A4 (en) 2014-10-22
CA2630787A1 (en) 2007-05-31
BRPI0618991B1 (en) 2017-10-31
US8065937B2 (en) 2011-11-29
EP1957748B1 (en) 2015-07-29
US20080282847A1 (en) 2008-11-20
EA200801419A1 (en) 2008-12-30
CA2630787C (en) 2012-10-09
NO323151B1 (en) 2007-01-08
NO20055576D0 (en) 2005-11-25
CN101365859B (en) 2013-04-03
DK1957748T3 (en) 2015-10-26
NO20055576A (en) 2007-01-08
AU2006317785B2 (en) 2009-12-17
EP1957748A1 (en) 2008-08-20
CN101365859A (en) 2009-02-11
BRPI0618991A2 (en) 2011-09-20

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