WO1999022111A1 - An apparatus for retaining two strings of tubulars - Google Patents

An apparatus for retaining two strings of tubulars Download PDF

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Publication number
WO1999022111A1
WO1999022111A1 PCT/GB1998/003198 GB9803198W WO9922111A1 WO 1999022111 A1 WO1999022111 A1 WO 1999022111A1 GB 9803198 W GB9803198 W GB 9803198W WO 9922111 A1 WO9922111 A1 WO 9922111A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubulars
string
retaining
converting member
body parts
Prior art date
Application number
PCT/GB1998/003198
Other languages
French (fr)
Inventor
Manfred Jansch
Original Assignee
Weatherford/Lamb, Inc.
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 Weatherford/Lamb, Inc. filed Critical Weatherford/Lamb, Inc.
Priority to CA002307630A priority Critical patent/CA2307630C/en
Priority to AU97523/98A priority patent/AU9752398A/en
Priority to US09/530,197 priority patent/US6422311B1/en
Priority to EP98951562A priority patent/EP1027522B1/en
Priority to DE69815140T priority patent/DE69815140T2/en
Publication of WO1999022111A1 publication Critical patent/WO1999022111A1/en
Priority to NO20001032A priority patent/NO319487B1/en
Priority to US10/174,416 priority patent/US7124828B2/en
Priority to US11/552,023 priority patent/US7673691B2/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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • E21B33/047—Casing heads; Suspending casings or tubings in well heads for plural tubing strings
    • 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
    • E21B19/02—Rod or cable suspensions
    • E21B19/06—Elevators, i.e. rod- or tube-gripping devices
    • 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
    • E21B19/02—Rod or cable suspensions
    • E21B19/06—Elevators, i.e. rod- or tube-gripping devices
    • E21B19/07—Slip-type elevators
    • 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
    • E21B19/10—Slips; Spiders ; Catching devices
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • E21B33/0407—Casing heads; Suspending casings or tubings in well heads with a suspended electrical cable

Definitions

  • the invention relates to an apparatus for retaining two strings of tubulars , and is particularly but not exclusively for use as a spider in the platform of an oil rig and also for use in an elevator of an oil rig.
  • the invention also relates to a device for retaining a string of tubulars the device comprising at least one body part having a curved tapered surface upon which inserts are located for engagement with the string of tubulars.
  • a retaining device is used in a platform of the rig, known as a spider, and a corresponding retaining device in an elevator of the rig.
  • the string of tubulars is initially retained from falling down the well by the spider. Additional stands of tubulars are moved from a rack to a position above the spider. The stand of tubulars is connected to the string.
  • the device in the elevator is placed around the top of the lengthened string of tubulars .
  • the spider is then released from engagement with the string, and the device in the elevator now takes the full weight of the lengthened string of tubulars .
  • the elevator moves downwardly towards the spider, lowering the lengthened string of tubulars .
  • the spider engages the lengthened string of tubulars and the elevator is subsequently released from engagement therewith. This process is reversed for pulling a string of tubulars out of a well .
  • a problem associated with prior art devices is that their construction is large, expensive and can only be used for retaining two strings of tubular .
  • an apparatus for retaining two strings of tubulars characterised in that said apparatus comprises body parts of a device for retaining a single string of tubulars and a converting member.
  • a device for retaining a string of tubulars comprising at least one body part having a curved tapered surface upon which inserts are located for engagement with said string of tubulars characterised in that said curved tapered surface comprises a recess for the passage of cables .
  • Figure 1 is a top plan view of a prior art device for retaining a single string of tubulars ;
  • Figure 2 is a top plan view of an apparatus for retaining two strings of tubulars, the apparatus being in accordance with a first aspect of the invention
  • Figure 3 is a cross sectional view of the apparatus of Figure 2 taken along the line III-III;
  • Figure 4 is a top plan view of part of the apparatus of Figure 2 ;
  • Figure 5 is a cross sectional view of the part of the apparatus of Figure 4 taken along the line V-V;
  • Figure 6 is a cross sectional view of the part of the apparatus of Figure 4 taken along the line VI-VI;
  • Figure 7 is a top plan view of an apparatus for retaining a single string of tubulars, the apparatus being in accordance with a second aspect of the invention.
  • Figure 8 is a top plan view of an alternative apparatus for retaining two strings of tubulars, the apparatus being in accordance with the first and second aspects of the invention;
  • Figure 9 is a cross sectional view of the apparatus of Figure 8 taken along the line IX-IX.
  • the device comprises two body parts 1 and 2.
  • the body parts 1 and 2 are generally triangular in shape and are hinged in relation to one another by means of inter engaging rows of eyelets 3 and 4 and a hinge pin 5 at one corner thereof .
  • Each row of eyelets 3 and 4 is integral with the respective body part 1 and 2.
  • the body parts 1 and 2 also have inter engaging rows of eyelets 6 and 7 on the opposite corners thereof.
  • the body parts 1 and 2 may be locked together by use of a locking pin 8 insertable through the rows of eyelets 6 and 7.
  • the body parts 1 and 2 are provided with semicircular tapered surfaces 9 and 10 which taper downwardly from a first diameter 11 to a second smaller diameter 12.
  • corresponding tapered inserts are provided on the tapered surface for gripping the tubular which runs therethrough. The weight of the tubular string will be transferred from the tapered inserts to the tapered surfaces 9 and 10.
  • Body part 1 also comprises an opening 14 which runs from the top to the bottom of the body part 1 and lies parallel to the tapered surface 9.
  • the opening 14 is provided for receiving an actuating piston and cylinder
  • the actuating piston and cylinder may be hydraulic or pneumatic.
  • two such devices are used.
  • One device is mounted in an elevator and the other is mounted in the floor of an oil rig .
  • a string of tubulars such as casing
  • a section of casing may then be added or taken away from the string of casing thereabove. This may be achieved by using tubular handling equipment to move the section of casing to a position above the string of casing, and a tong to facilitate connection or disconnection of the section of casing to or from the string of casing.
  • the device mounted in the elevator may now be used to retain the section of casing extending above the device in the floor of the oil rig.
  • the device in the floor of the oil rig may now be disengaged from the string of tubulars .
  • the elevator is then operated to lower or raise the entire string of casing.
  • the device in the rig floor is then used to retain the string of casing once again.
  • FIG. 1 there is shown an apparatus for retaining two strings of tubulars , the apparatus being in accordance with the invention.
  • the apparatus is generally identified by the reference numeral 100.
  • the apparatus 100 comprises body part 101 which is generally similar to body part 1 of Figure 1 , body part 102 which a mirror image of the body part 1 of Figure 1 and a converting member 103.
  • the converting member 107 is generally rectangular in shape with rows of eyelets 104,105,106,107 at each corner thereof.
  • the converting member is provided with two semicircular tapered surfaces 108,109 which taper downwardly from a first diameter 110 to a smaller diameter 111.
  • the semicircular tapered surfaces 108,109 oppose each other and merge as the diameter increases from the smaller diameter to the first diameter as shown in Figure 6.
  • corresponding tapered inserts are provided on the tapered surfaces 108,109 for gripping a tubular .
  • the converting member 103 is arranged between the body parts 101 and 102 and are hinged thereto.
  • a row of eyelets 112 is integral with one corner of the body part 101 and inter engages with the row of eyelets 104 of the converting member 103 and a hinge pin 113 is located therethrough.
  • a row of eyelets 114 is integral with a first corner of the body part 102 and inter engages with the row of eyelets 105 of the converting member 103 and a hinge pin 115 is located therethrough.
  • a row of eyelets 116 is integral with an opposing corner of body part 101 and inter engages with a row of eyelets 106 of the converting member 103 and a locking pin 117 may be inserted therethrough to lock the body part 101 to the converting member 103.
  • a row of eyelets 118 is integral with an opposing corner of body part 102 and inter engages with the row of eyelets 107 of the converting member 103 and a locking pin 119 may be inserted therethrough to lock the body part 102 to the converting member 103.
  • Each of the body parts 101 and 102 are provided with corresponding tapered surfaces 120 and 121 and with openings 122 and 123 for receiving actuating pistons and cylinders as described with reference to the device of Figure 1.
  • two such apparatuses are used, one as a spider in the platform of an oil rig and the other in the elevator of the oil rig.
  • the method of operation is much the same as that described with reference to the device of Figure 1 , except that two actuating pistons and cylinders are used to move the tapered inserts along the tapered surfaces 108,109,120 and 121 for engaging or disengaging the inserts with a tubular.
  • FIG. 7 there is shown a device, generally identified by reference numeral 200.
  • the device 200 is generally similar to the device shown in Figure 1 with the additional feature of a recess 201 in the tapered surface 202 of the body part 203.
  • the recess 201 is sized to accommodate a loom of cables running substantially parallel to the string of tubulars . This enables the cable strings to pass through the device for retaining a string of tubulars , for example , through a spider.
  • FIGS 8 and 9 shows an apparatus generally identified by reference numeral 300.
  • the device 300 is generally similar to the apparatus 100 of Figure 2 with the additional feature of a recess 301 and 302 in each of the tapered surface 303 and 304 of the converting member 305.
  • the recesses 301 and 302 are sized to accommodate a loom of cables running substantially parallel to the two strings of tubulars . This enables the cable strings to pass through the device for retaining a string of tubulars, for example, through a spider.
  • apparatuses could be used for coiled tubing, as well as tool strings, strings of drill pipe , casing and liners .

Abstract

An apparatus for retaining two strings of tubulars characterised in that said apparatus comprises body parts (1, 2; 101, 102) of a device for retaining a single string of tubulars and a converting member (103; 305). A device for retaining a string of tubulars, said device comprising at least one body part (203) having a curved tapered surface (202) upon which inserts are located for engagement with said string of tubulars characterised in that said curved tapered surface comprises a recess for the passage of cables.

Description

AN APPARATUS FOR RETAINING TWO STRINGS OF TUBULARS
The invention relates to an apparatus for retaining two strings of tubulars , and is particularly but not exclusively for use as a spider in the platform of an oil rig and also for use in an elevator of an oil rig. The invention also relates to a device for retaining a string of tubulars the device comprising at least one body part having a curved tapered surface upon which inserts are located for engagement with the string of tubulars.
In the formation and operation of oil or gas wells it is desirable to lower a string of tubulars into the well . For this purpose , a retaining device is used in a platform of the rig, known as a spider, and a corresponding retaining device in an elevator of the rig. The string of tubulars is initially retained from falling down the well by the spider. Additional stands of tubulars are moved from a rack to a position above the spider. The stand of tubulars is connected to the string. The device in the elevator is placed around the top of the lengthened string of tubulars . The spider is then released from engagement with the string, and the device in the elevator now takes the full weight of the lengthened string of tubulars . The elevator moves downwardly towards the spider, lowering the lengthened string of tubulars . The spider engages the lengthened string of tubulars and the elevator is subsequently released from engagement therewith. This process is reversed for pulling a string of tubulars out of a well . It is often desired to lower two substantially parallel strings of tubulars simultaneously, such as a delivery pipe and an injection pipe used in the forced extraction of oil or gas from a well or used in trial wells . A problem associated with prior art devices is that their construction is large, expensive and can only be used for retaining two strings of tubular .
Accordingly there is provided an apparatus for retaining two strings of tubulars characterised in that said apparatus comprises body parts of a device for retaining a single string of tubulars and a converting member.
Other features and aspects of the present invention are set out in claims 2 to 9. There is also provided a device for retaining a string of tubulars, said device comprising at least one body part having a curved tapered surface upon which inserts are located for engagement with said string of tubulars characterised in that said curved tapered surface comprises a recess for the passage of cables .
For a better understanding of the present invention, reference will now be made, by way of example, to the accompanying drawings , in which :
Figure 1 is a top plan view of a prior art device for retaining a single string of tubulars ;
Figure 2 is a top plan view of an apparatus for retaining two strings of tubulars, the apparatus being in accordance with a first aspect of the invention;
Figure 3 is a cross sectional view of the apparatus of Figure 2 taken along the line III-III;
Figure 4 is a top plan view of part of the apparatus of Figure 2 ;
Figure 5 is a cross sectional view of the part of the apparatus of Figure 4 taken along the line V-V; Figure 6 is a cross sectional view of the part of the apparatus of Figure 4 taken along the line VI-VI;
Figure 7 is a top plan view of an apparatus for retaining a single string of tubulars, the apparatus being in accordance with a second aspect of the invention;
Figure 8 is a top plan view of an alternative apparatus for retaining two strings of tubulars, the apparatus being in accordance with the first and second aspects of the invention; Figure 9 is a cross sectional view of the apparatus of Figure 8 taken along the line IX-IX.
Referring to Figure 1 there is shown a prior art device for retaining a single string of tubulars . The device comprises two body parts 1 and 2. The body parts 1 and 2 are generally triangular in shape and are hinged in relation to one another by means of inter engaging rows of eyelets 3 and 4 and a hinge pin 5 at one corner thereof . Each row of eyelets 3 and 4 is integral with the respective body part 1 and 2. The body parts 1 and 2 also have inter engaging rows of eyelets 6 and 7 on the opposite corners thereof. The body parts 1 and 2 may be locked together by use of a locking pin 8 insertable through the rows of eyelets 6 and 7.
The body parts 1 and 2 are provided with semicircular tapered surfaces 9 and 10 which taper downwardly from a first diameter 11 to a second smaller diameter 12. In use, corresponding tapered inserts (not shown) are provided on the tapered surface for gripping the tubular which runs therethrough. The weight of the tubular string will be transferred from the tapered inserts to the tapered surfaces 9 and 10.
A gap 13 is provided between the body parts 1 and 2. Body part 1 also comprises an opening 14 which runs from the top to the bottom of the body part 1 and lies parallel to the tapered surface 9. The opening 14 is provided for receiving an actuating piston and cylinder
(not shown) which, in use, moves the tapered inserts along the tapered surfaces 9 and 10 for engaging or disengaging the inserts with a tubular. The actuating piston and cylinder may be hydraulic or pneumatic.
In use, two such devices are used. One device is mounted in an elevator and the other is mounted in the floor of an oil rig . A string of tubulars , such as casing, is first retained in the device mounted in the floor of the oil rig. A section of casing may then be added or taken away from the string of casing thereabove. This may be achieved by using tubular handling equipment to move the section of casing to a position above the string of casing, and a tong to facilitate connection or disconnection of the section of casing to or from the string of casing. The device mounted in the elevator may now be used to retain the section of casing extending above the device in the floor of the oil rig. The device in the floor of the oil rig may now be disengaged from the string of tubulars . The elevator is then operated to lower or raise the entire string of casing. The device in the rig floor is then used to retain the string of casing once again.
Referring to Figures 2 to 6 there is shown an apparatus for retaining two strings of tubulars , the apparatus being in accordance with the invention. The apparatus is generally identified by the reference numeral 100.
The apparatus 100 comprises body part 101 which is generally similar to body part 1 of Figure 1 , body part 102 which a mirror image of the body part 1 of Figure 1 and a converting member 103.
The converting member 107 is generally rectangular in shape with rows of eyelets 104,105,106,107 at each corner thereof. The converting member is provided with two semicircular tapered surfaces 108,109 which taper downwardly from a first diameter 110 to a smaller diameter 111. The semicircular tapered surfaces 108,109 oppose each other and merge as the diameter increases from the smaller diameter to the first diameter as shown in Figure 6. In use, corresponding tapered inserts (not shown) are provided on the tapered surfaces 108,109 for gripping a tubular .
The converting member 103 is arranged between the body parts 101 and 102 and are hinged thereto. A row of eyelets 112 is integral with one corner of the body part 101 and inter engages with the row of eyelets 104 of the converting member 103 and a hinge pin 113 is located therethrough. A row of eyelets 114 is integral with a first corner of the body part 102 and inter engages with the row of eyelets 105 of the converting member 103 and a hinge pin 115 is located therethrough. A row of eyelets 116 is integral with an opposing corner of body part 101 and inter engages with a row of eyelets 106 of the converting member 103 and a locking pin 117 may be inserted therethrough to lock the body part 101 to the converting member 103. A row of eyelets 118 is integral with an opposing corner of body part 102 and inter engages with the row of eyelets 107 of the converting member 103 and a locking pin 119 may be inserted therethrough to lock the body part 102 to the converting member 103.
Each of the body parts 101 and 102 are provided with corresponding tapered surfaces 120 and 121 and with openings 122 and 123 for receiving actuating pistons and cylinders as described with reference to the device of Figure 1.
In use, two such apparatuses are used, one as a spider in the platform of an oil rig and the other in the elevator of the oil rig. The method of operation is much the same as that described with reference to the device of Figure 1 , except that two actuating pistons and cylinders are used to move the tapered inserts along the tapered surfaces 108,109,120 and 121 for engaging or disengaging the inserts with a tubular.
Referring now to Figure 7 there is shown a device, generally identified by reference numeral 200.
The device 200 is generally similar to the device shown in Figure 1 with the additional feature of a recess 201 in the tapered surface 202 of the body part 203. The recess 201 is sized to accommodate a loom of cables running substantially parallel to the string of tubulars . This enables the cable strings to pass through the device for retaining a string of tubulars , for example , through a spider.
Figures 8 and 9 shows an apparatus generally identified by reference numeral 300.
The device 300 is generally similar to the apparatus 100 of Figure 2 with the additional feature of a recess 301 and 302 in each of the tapered surface 303 and 304 of the converting member 305. The recesses 301 and 302 are sized to accommodate a loom of cables running substantially parallel to the two strings of tubulars . This enables the cable strings to pass through the device for retaining a string of tubulars, for example, through a spider.
It is envisaged that the apparatuses could be used for coiled tubing, as well as tool strings, strings of drill pipe , casing and liners .

Claims

Claims :
1. An apparatus for retaining two strings of tubulars characterised in that said apparatus comprises body parts (1,2;101,102) of a device for retaining a single string of tubulars and a converting member (103; 305) .
2. An apparatus as claimed in Claim 1 characterised in that said apparatus comprises two of said body parts (1,2,-101,102) which together encircle said single string of tubulars and wherein said converting member (103; 305) is located between said two body parts .
3. An apparatus as claimed in Claim 1 or 2 characterised in that said body parts (1,2 ; 101, 102) and said converting member (103;305) comprise hinge components (3,4,5,-104,105,112-5) and are hinged therebetween .
4. An apparatus as claimed in Claim 1 , 2 or 3 characterised in that said body parts (1,2,-101,102) and said converting member (103; 305) comprise locking components (6,7 , 8; 106, 107 ,116-9) for secure fastening therebetween.
5. An apparatus as claimed in any of Claims 2 to 4 characterised in that said body parts (1,2 ; 101, 102) and said converting member (103;305) have substantially semicircular surfaces (108, 109, 120, 121;303 ,304) which taper downwardly upon which inserts are located for engagement with said strings of tubulars .
6. An apparatus as claimed in Claim 5 characterised in that said body parts (1,2 ; 101, 102) comprise openings (122,123) for an actuator for moving said insert along said tapered surface .
7. An apparatus as claimed in Claim 5 or 6 characterised in that said converting member (103) comprises two semicircular surfaces (108,109) which merge along said taper.
8. An apparatus as claimed in any of Claims 5 to 7 characterised in that said semicircular surfaces (108,109,120,121) comprises a recess (301,302) for the passage of cables .
9. A converting member of any preceding Claim.
10. A device for retaining a string of tubulars, said device comprising at least one body part (203) having a curved tapered surface (202) upon which inserts are located for engagement with said string of tubulars characterised in that said curved tapered surface comprises a recess for the passage of cables .
PCT/GB1998/003198 1997-10-28 1998-10-27 An apparatus for retaining two strings of tubulars WO1999022111A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CA002307630A CA2307630C (en) 1997-10-28 1998-10-27 An apparatus for retaining two strings of tubulars
AU97523/98A AU9752398A (en) 1997-10-28 1998-10-27 An apparatus for retaining two strings of tubulars
US09/530,197 US6422311B1 (en) 1997-10-28 1998-10-27 Apparatus for retaining two strings of tubulars
EP98951562A EP1027522B1 (en) 1997-10-28 1998-10-27 An apparatus for retaining two strings of tubulars
DE69815140T DE69815140T2 (en) 1997-10-28 1998-10-27 DEVICE FOR HOLDING TWO HOLE PIPES
NO20001032A NO319487B1 (en) 1997-10-28 2000-03-01 Apparatus for holding two rudder strings
US10/174,416 US7124828B2 (en) 1997-10-28 2002-06-18 Apparatus for retaining two strings of tubulars
US11/552,023 US7673691B2 (en) 1997-10-28 2006-10-23 Apparatus for retaining two strings of tubulars

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19747468A DE19747468C1 (en) 1997-10-28 1997-10-28 Pipe clamp for manipulating double pipe strings
DE19747468.3 1997-10-28

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US09/530,197 A-371-Of-International US6422311B1 (en) 1997-10-28 1998-10-27 Apparatus for retaining two strings of tubulars
US09530197 A-371-Of-International 1998-10-27
US10/174,416 Continuation US7124828B2 (en) 1997-10-28 2002-06-18 Apparatus for retaining two strings of tubulars

Publications (1)

Publication Number Publication Date
WO1999022111A1 true WO1999022111A1 (en) 1999-05-06

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ID=7846802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/003198 WO1999022111A1 (en) 1997-10-28 1998-10-27 An apparatus for retaining two strings of tubulars

Country Status (7)

Country Link
US (3) US6422311B1 (en)
EP (2) EP1027522B1 (en)
AU (1) AU9752398A (en)
CA (1) CA2307630C (en)
DE (3) DE19747468C1 (en)
NO (1) NO319487B1 (en)
WO (1) WO1999022111A1 (en)

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US6987908B2 (en) * 2001-08-24 2006-01-17 T-Networks, Inc. Grating dispersion compensator and method of manufacture
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BRPI0619250B1 (en) * 2005-11-30 2017-11-14 Weatherford Technology Holding, Llc METHOD OF PASSING A CONTROL LINE AND SECURITY INTERRUPTION SYSTEM
CN101343985B (en) * 2008-08-27 2011-07-27 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 Transverse beam type pipe clamping device
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DE69815140D1 (en) 2003-07-03
US20070102162A1 (en) 2007-05-10
AU9752398A (en) 1999-05-17
NO20001032L (en) 2000-04-14
NO319487B1 (en) 2005-08-22
EP1027522A1 (en) 2000-08-16
EP1329587A2 (en) 2003-07-23
US20040040701A1 (en) 2004-03-04
DE19747468C1 (en) 1999-04-01
DE69826154D1 (en) 2004-10-14
US7673691B2 (en) 2010-03-09
CA2307630A1 (en) 1999-05-06
DE69815140T2 (en) 2004-02-26
US6422311B1 (en) 2002-07-23
NO20001032D0 (en) 2000-03-01
US7124828B2 (en) 2006-10-24
EP1329587A3 (en) 2004-01-14
EP1329587B1 (en) 2004-09-08
EP1027522B1 (en) 2003-05-28
CA2307630C (en) 2006-12-12

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