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US3913687A - Pipe handling system - Google Patents

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Publication number
US3913687A
US3913687A US44757474A US3913687A US 3913687 A US3913687 A US 3913687A US 44757474 A US44757474 A US 44757474A US 3913687 A US3913687 A US 3913687A
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Prior art keywords
pipe
string
power
head
transfer
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Expired - Lifetime
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Laszlo Gyongyosi
Everett A Whetstone
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Ingersoll-Rand Co
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Ingersoll-Rand Co
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick
    • E21B19/14Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole
    • E21B19/15Racking of rods in horizontal position; Handling between horizontal and vertical position
    • E21B19/155Handling between horizontal and vertical position
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick
    • E21B19/20Combined feeding from rack and connecting, e.g. automatically

Abstract

This system is used for removing from and/or placing pipe in a well. The system includes a vertically movable power head which is mounted on a tower. A pipe transfer elevator which is connected to a pulley system including at least one cable extending around a sheave located on the movable power head is used to transfer pipe between the pipe storage area and the power head. A pipe string holder is mounted in a hole formed in the tower platform. The pipe string holder is adapted to releasably hold the pipe string. The pipe transfer elevator includes an arcuate member which is adapted to fit over the smaller diameter portion of a pipe but yet contact the pipe coupling which is of a larger outside diameter for moving the pipe between the pipe storage area and the tower. The pipe string holder includes a pair of pivotable members each having a semicircular shoulder formed therein and facing one another to form a substantially circular shoulder.

Description

United States Patent [191 Gyongyosi et al.

[ Oct. 21, 1975 PIPE HANDLING SYSTEM [75] Inventors: Laszlo Gyongyosi; Everett A.

Whetstone, both of Harris, W. Va.

[73] Assignee: Ingersoll-Rand Company, Woodcliff Lake, NJ.

[22] Filed: Mar. 4, 1974 [21] Appl. No.: 447,574

[52] US. Cl. 175/85; 166/775; 173/57; 173/164 [51] Int. Cl. E21B 19/14 [58] Field of Search 173/164-167, 173/57; 175/52, 85; 166/775; 294/91 [56] References Cited UNITED STATES PATENTS 1,481,378 l/l924 Le Bus 173/167 X 2,384,331 9/1945 Neilson... 294/91 2,527,255 10/1950 Hunt 175/85 X 3,779,594 12/1973 Monroe 294/91 FOREIGN PATENTS OR APPLICATIONS 6/1966 Germany 175/85 Primary ExaminerErnest R. Purser Attorney, Agent, or Firm-F. S. Troidl [57] ABSTRACT This system is used for removing from and/or placing pipe in a well. The system includes a vertically mov able power head which is mounted on a tower. A pipe transfer elevator which is connected to a pulley system including at least one cable extending around a sheave located on the movable power head is used to transfer pipe between the pipe storage area and the power head. A pipe string holder is mounted in a hole formed in the tower platform. The pipe string holder is adapted to releasably hold the pipe string.

The pipe transferelevator includes an arcuate member which is adapted to fit over the smaller diameter portion of a pipe but yet contact the pipe coupling which is of a larger outside diameter for moving the pipe between the pipe storage area and the tower.

The pipe string holder includes a pair of pivotable members each having a semicircular shoulder formed therein and facing one another to form a substantially circular shoulder.

2 Claims, 7 Drawing Figures US. Patent 0a. 21, 1975 Sheet 1 of 4 3,913,687

lfli.

US. Patent Oct. 21, 1975 Sheet20f4 3,913,687

U.S. Patent Oct. 21, 1975 Sheet 3 of4 3,913,687

FIG. 6

U.S. Patent Oct. 21, 1975 Sheet 4 of4 3,913,687

FIG. 7

52 FIG. 8

PIPE HANDLING SYSTEM This invention relates to wells. More particularly, this invention is a new system for use on a tower for removing from and placing pipe in a well, such as an oil and gas well casing.

Generally, a conventional pipe or casing handling system includes a. large rotary table on the platform of a rig. The pipe is lifted and lowered with a large split block or hoist and elevator. Very heavy expensive power tongs are used for coupling and disconnecting pipes to form or remove, respectively, a pipe string or casing. The casing or pipe string is held by very heavy power slips located on the tower platform. With such conventional oil and gas well pipe handling systems up to six or more men are required to handle the equipment efficiently.

Experts in the industry are continuously seeking to lighten the heavy equipment required for pipe handling in oil and gas wells while at the same time making certain the equipment is strong enough to handle the oper ations. Such experts are also continuously trying to improve the operation of pipe handling systems thus requiring fewer men.

This invention is a new system for use on a tower for removing from and placing pipe in a well. Instead of the conventional split block and power tongs for moving the pipe and threading a pipe string together or unthreading the pipe string a top power head is movably mounted on the tower. The power head performs among other things the function of lowering and/or raising the pipe vertically along the tower and also of threading or unthreading the pipe string. A pulley system is connected to the power head and movable vertically'with the power head. A pipe transfer line extends around the pulley. A pipe transfer elevator is attached to the free end of the pipe transfer line. The pipe transfer elevator is adapted to engage the coupling of a pipe, lift the pipe, and move the pipe to the top power head for connecting to the power head. The power head is then lowered and the pipe connected to the pipe string holder. As the pipe is being lowered by the power head the pipe transfer elevator is moved toward the pipe storage area for connection to another pipe.

Our new pipe transfer elevator comprises an arcuate member having a radially inwardly extending shoulder. The space between the extremities of the arcuate member is sufficiently large for the arcuate member to fit over a smaller diameter portion of the pipe. However the space is sufficiently large for the arcuate member to hold the pipe coupling'and prevent the pipe from falling out during movement between the pipe storage and the power head. The radial shoulder contacts the underside of the pipe coupling for movement and support of the pipe.

Our new pipe string holder comprises a pair of pivotable members with each member being provided with a semicircular shoulder. The semicircular shoulders face one another. to provide a substantially circular shoulder for supporting a pipe string. p

The invention as well as its many advantages will be further understood by reference to the following detail description and drawings in which:

FIG. I is a front elevational view, partly schematic, illustrating our new pipe system;

FIG. 2 is a side elevational view, partly schematic, of the new pipe handling system;

FIG. 3 is a side elevational view with a schematic representation of the lowering of a pipe for connection to the pipe string holder while the pipe transfer elevator is simultaneously moving to the pipe storage area for grasping another piece of pipe; I

FIG. 4 is a side elevational view illustrating the upward movement of the top head and the action of the pipe transfer elevator in moving the next pipe to the power head;

FIG. 5 isa perspective view showing our new pipe transfer elevator;

FIG. 6 is a sectional view illustrating our new pipe string holder;

FIG. 7 is a top plan view taken generally along line 7-7 of FIG. 6;

FIG. 8 is a sectional view similar to FIG. 6 showing the pivotable members in the open position to permit the raising or lowering of the pipe string into the well.

Referring to FIG. 1 the new pipe handling system includes a tower indicated generally by the numeral 10. The tower includes power head guides 12 and 14 along which a power head 16 is moved vertically. The means for moving the power head along the guides may be any conventional means such as the chain mechanism shown in U.S. Pat. No. 3,286,777.

A spindle 18 extends vertically downwardly from the lower portion of the power head 16. Spindle 18 is provided with threads 20 for attachment of a pipe coupling.

'A pulley system is used for lifting pipe upwardly to the power head 16 for a threaded connection to spindle 18. In the particular preferred emboidmentshown the pulley system includes a pair of spaced apart cables 22 and 24' which are detachably anchored to the base of the tower 10. Cables 22 and 24 extend around coaxial sheaves 26 and 28, respectively. The free ends of cables are detachably connected to the transfer elevator 30.

As shown in FIG. 5 the pipe transfer elevator 30 includes a pair of wing members 32 and 34 with eye bolts 36 and 38 inserted in the ends of the wing members 32 and 34 respectively. The eye bolt 36 and 38 can be connected to the hooks 40 and 42 respectively (see FIG. 1) connected to cables 22 and 24 respectively.

The pipe transfer elevator 30 includes an arcuate portion 44 large enough to encompass coupling 52 of the pipe. The extremities 46 and 48 of the arcuate portion 44 are arcuately spaced apart a sufficient distance so the arcuate member 44 may be placed around the smaller diameter portion 50 of the pipe. Though the space between the extremities of the arcuate portion is such that the arcuate portion will fit over the smaller outside portion of the pipe the space is sufficiently small to prevent the pipe from falling out of the pipe transfer elevator 30 while it is being moved between the pipe storage area and the power head. A shoulder 54 extends radially inwardly from the inside of arcuate portion 44 and is adapted to contact the bottom edge of the coupling 52.

Referring again to FIG. 1 a pipe string holder 56 is located in a hole formed in the platform 58. The pipe string holder is adapted to releasably 'hold the pipe string. In the specific embodiment shown in FIGS. 6 through 8 the platform 58 is provided with a pipe centralizer 60. A pipe string holder adapter 62 is mounted in the centrali'zer. The pipe string holder adapter includes a central bore 64 of sufficient diameter for the pipe string to beraised or lowered therethrough and sides 74 position and prevent undue lateral movement of the pivotable members 68 and 70.

Pivotable pipe string holders 68 and 70 are provided with semicircular shoulders 78 and 80, respectively. The semicircular soulders face one another so that when the pivotable members are in the positions shown in FIGS. 6 and 7a substantially circular shoulder is formed for supporting the pipe string.

As shown in FIG. 6 the outside longitudinal edge of each pivotable member 68 and 70 includes a portion 82 and84 respectively which tapers downwardly and inwardly at an angle at approximately 45 to the horizontal when the pivotable members are positioned to hold a pipe string.

The inner longitudinal portions 86 and 88 on the pivotable members 68 and 70 also extend at an angle of approximately 45 with the horizontal. Portions 86 and 88 are spaced from the angle plates 72 by a small amount of say 0.0032 inches when in the position shown in FIG. 6.

Pivotable members 68 and 70 are also beveled'at 90 and 92 respectively; Thus when pivotable members 68 and 70 are pivoted outwardly to remove a pipe from a well or-insert a pipe into the well the tapered portions 82 and 84 lie flat against the pipe string holder member adapter 62 and the beveled portions 90 and 92 lie flat against the floor of grooves 66. In operations as shown in FIG. 1 the pipe transfer elevator is lifting a pipe up to the spindle 18. The length of each cable 22 and 24 is predetermined and chosen so that when the power head 16 reaches its top position in tower the transfer elevator 30 is in position for the power head to rotate spindle l8 tothread the pipe onto the thread of the spindle; This position is shown in FIG. 2.

The power head with the attached pipe is then lowered for connection to the pipe string. The chain wrench 57 is held against a portion of the tower 10 to prevent rotation of the pipe string while the additional pipe is threaded into the coupling of the top pipe in the pipe string. The chain wrench is then removed and the casing string raised a sufficient enough distance to permit the opening of the pipe string holding parts 68 and 70.

The pipe string is then lowered by lowering the power head 16, as shown in FIG. 3. While the pipe string is being lowered by the power head, the transfer elevator 30 is also moving downwardly at double the speed of the speed of the power head. The transfer elevator can be removed from the pipe string and attached to the next pipe as shown in the broken lines in FIG. 3. This is a great time saving feature because the pipe transfer.

elevator 30 is already on its way and being attached to the next pipe in the pipe storage area laterally spaced from the tower while the string is being lowered. Also while the string is being lowered the pipe string holding members 68 and 70 are again closed so that the lower portion of the coupling will be supported by the semicircular shoulders 78 and 80.

After the top pipe is fully inserted into the pipe string holding tool the direction of rotation of spindle 18 is reversed to remove the spindle from the top pipe. During the removal of the spindle the-chainwrench 57 is again held tightly against the tower to prevent rotation of the pipe string while the spindle is unscrewed from.

the top pipe.

Thereafter as shown in FIG. 4-the power head 16 is moved upwardly along the tower 10. As the power head moves upwardly the next pipe is grabed by the pipe. string elevator 30 and moved into position for attachment tospindle l8-and the cycle repeated.

The series of steps described above for making up a A pipe string or casing is reversed to break out the pipe 7 stringor casing.

Weclaim: 1. A system for use on a tower for removing from and placing pipe in a well, the pipe having a coupling of larger outside diameter than the outside diameter of the remainder of the pipe comprising: a vertically movable power head mounted .on the tower, the power head having means for connecting a pipe coupling to I the power head; a pulley system comprising coaxial spaced apart sheaves mounted on and extending below the power head .and a cable extending around each 1 sheave with one end anchored to the tower and the free end extending downwardly from the sheave; a pipe transfer elevator attached tothe free ends of the cables, the pipe transfer elevator having means for attaching the transfer elevator to the free ends of the cables and an arcuate portion, the space between the extremities of the arcuate portion being such that the arcuate portion may fit over the smaller diameter portion .of the pipe but the coupling will be contained in the arcuate portion after the arcuate portion has been fit over the small diameter portion and then pulled over the coupling, the arcuate portion also having a radially extending arcuate shoulder adapted to contact the bottom edge of the coupling; a pair of pivotable pipe string holding members mounted on a platform of the tower each pipe string holding member being a semi-circular shoulder adapted to. be contacted by the bottom edge,

pipe string holding member also being constructed so i that when it is pivoted to permit thevertical movement of the pipe string, saidtapering portionwill lie flat against a flat pipe string holding member support.

2. A system for use on a tower for removing from and placing pipe in a well, the pipe having'a coupling of larger outside diameterthan the remainder of the pipe,

comprising: a power head movable vertically and mountedon the tower; a pulley system connected to the power head and vertically movable with the power head and comprising coaxial spaced apart pulleys mounted on the power head; pipe transfer lines extending around the pulleys and constituting part of the pulley system, the pipe transfer lines extending around the pulleys in a direction such that the free ends of the pipe I i transfer lines may be moved to a pipe storage area laterally spaced from the tower, and a pipe transfer elevator attached to the free ends of the pipe transfer lines, and adapted to engage the coupling of a pipe and lift the pipe; a platform associated with the tower and having a hole into which the pipe is to be placed or from 1 which the pipe is to be removed; a pipe string holder mounted in the platform hole, said pipe stringholder 6 hold a pipe string, each pipe string holder also being constructed so that when it is pivoted to permit the vertical movement of the pipe string, said tapering portion will be flat against a flat pipe string holding member support.

Claims (2)

1. A system for use on a tower for removing from and placing pipe in a well, the pipe having a coupling of larger outside diameter than the outside diameter of the remainder of the pipe comprising: a vertically movable power head mounted on the tower, the power head having means for connecting a pipe coupling to the power head; a pulley system comprising coaxial spaced apart sheaves mounted on and extending below the power head and a cable extending around each sheave with one end anchored to the tower and the free end extending downwardly from the sheave; a pipe transfer elevator attached to the free ends of the cables, the pipe transfer elevator having means for attaching the transfer elevator to the free ends of the cables and an arcuate portion, the space between the extremities of the arcuate portion being such that the arcuate portion may fit over the smaller diameter portion of the pipe but the coupling will be contained in the arcuate portion after the arcuate portion has been fit over the small diameter portion and then pulled over the coupling, the arcuate portion also having a radially extending arcuate shoulder adapted to contact the bottom edge of the coupling; a pair of pivotable pipe string holding members mounted on a platform of the tower each pipe string holding member being a semi-circular shoulder adapted to be contacted by the bottom edge of a pipe coupling for support of the pipe string, each pipe holding member also having an outside portion tapering downwardly and inwardly at an angle of approximately 45* to the horizontal, when the pipe string holding member is positioned to hold a pipe string, each pipe string holding member also being constructed so that when it is pivoted to permit the vertical movement of the pipe string, said tapering portion will lie flat against a flat pipe string holding member support.
2. A system for use on a tower for removing from and placing pipe in a well, the pipe having a coupling of larger outside diameter than the remainder of the pipe, comprising: a power head movable vertically and mounted on the tower; a pulley system connected to the power head and vertically movable with the power head and comprising coaxial spaced apart pulleys mounted on the power head; pipe transfer lines extending around the pulleys and constituting part of the pulley system, the pipe transfer lines extending around the pulleys in a direction such that the free ends of the pipe transfer lines may be moved to a pipe storage area laterally spaced from the tower, and a pipe transfer elevator attached to the free ends of the pipe transfer lines, and adapted to engage the coupling of a pipe and lift the pipe; a platform associated with the tower and having a hole into which the pipe is to be placed or from which the pipe is to be removed; a pipe string holder mounted in the platform hole, said pipe string holder having a pair of pivotable members with each member having a semicircular shoulder formed therein, the shoulder serving to contact the bottom of the pipe coupling to support the pipe string, each pipe string holder also having an outside portion tapering downwardly and inwardly at an angle of approximately 45* to the horizontal when the pipe string holder is positioned to hold a pipe string, each pipe string holder also being constructed so that when it is pivoted to permit the vertical movement of the pipe string, said tapering portion will be flat against a flat pipe string holding member support.
US3913687A 1974-03-04 1974-03-04 Pipe handling system Expired - Lifetime US3913687A (en)

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US05553582 Continuation-In-Part US3992631A (en) 1975-02-27 1975-02-27 Fluorometric system, method and test article
US05703579 Continuation-In-Part US4056724A (en) 1975-02-27 1976-07-08 Fluorometric system, method and test article

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Cited By (41)

* Cited by examiner, † Cited by third party
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US4111388A (en) * 1977-05-18 1978-09-05 Presley J M Vertical pipe holding tool
FR2530723A1 (en) * 1982-07-26 1984-01-27 Uop Inc wellscreen a tubular base and connecting device of multiwell filter segments for oil well drilling
US5083356A (en) * 1990-10-04 1992-01-28 Exxon Production Research Company Collar load support tubing running procedure
DE19502355C1 (en) * 1995-01-26 1996-08-01 Wirth Co Kg Masch Bohr Ground=mounted support to grip vertically projecting component
US5850766A (en) * 1997-05-16 1998-12-22 Stokes; Charles William Pipe joint break-out device
WO2000011309A1 (en) * 1998-08-24 2000-03-02 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US6161617A (en) * 1996-09-13 2000-12-19 Hitec Asa Device for connecting casings
WO2002014648A1 (en) * 1998-12-02 2002-02-21 Cudd Pressure Control, Inc. Combined drilling apparatus and method
WO2002059449A1 (en) * 2001-01-24 2002-08-01 Frank's International, Inc. Collar load support system and method
US6494273B1 (en) * 1998-05-12 2002-12-17 Richard Martin Elevator for supporting an elongate member such as a drill pipe
US6622796B1 (en) 1998-12-24 2003-09-23 Weatherford/Lamb, Inc. Apparatus and method for facilitating the connection of tubulars using a top drive
US20040017081A1 (en) * 2002-07-06 2004-01-29 Simpson Neil Andrew Abercrombie Coupling tubulars
US6705405B1 (en) 1998-08-24 2004-03-16 Weatherford/Lamb, Inc. Apparatus and method for connecting tubulars using a top drive
US6722443B1 (en) 1998-08-08 2004-04-20 Weatherford/Lamb, Inc. Connector for expandable well screen
US6725938B1 (en) 1998-12-24 2004-04-27 Weatherford/Lamb, Inc. Apparatus and method for facilitating the connection of tubulars using a top drive
US6742596B2 (en) 2001-05-17 2004-06-01 Weatherford/Lamb, Inc. Apparatus and methods for tubular makeup interlock
US20040104575A1 (en) * 2002-09-13 2004-06-03 Peter Ellington Expandable coupling
US20040108119A1 (en) * 2002-12-06 2004-06-10 Maguire Patrick G. Wire lock expandable connection
US20040113428A1 (en) * 2002-09-25 2004-06-17 Macaulay Iain Cameron Expandable connection
US20040135370A1 (en) * 2002-09-17 2004-07-15 Evans Jason David Tubing connection arrangement
US20040231839A1 (en) * 2003-05-22 2004-11-25 Peter Ellington Thread integrity feature for expandable connections
US20050051343A1 (en) * 1998-07-22 2005-03-10 Weatherford/Lamb, Inc. Apparatus for facilitating the connection of tubulars using a top drive
US20050184521A1 (en) * 2003-05-22 2005-08-25 Maguire Patrick G. Tubing connector
US6976298B1 (en) 1998-08-24 2005-12-20 Weatherford/Lamb, Inc. Methods and apparatus for connecting tubulars using a top drive
US20060107514A1 (en) * 1997-03-21 2006-05-25 Weatherford Lamb, Inc. Expandable slotted tubing string and method for connecting such a tubing string
US7096982B2 (en) 2003-02-27 2006-08-29 Weatherford/Lamb, Inc. Drill shoe
US7448456B2 (en) 2002-07-29 2008-11-11 Weatherford/Lamb, Inc. Adjustable rotating guides for spider or elevator
US7513300B2 (en) 1998-08-24 2009-04-07 Weatherford/Lamb, Inc. Casing running and drilling system
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US7694744B2 (en) 2005-01-12 2010-04-13 Weatherford/Lamb, Inc. One-position fill-up and circulating tool and method
US7712523B2 (en) 2000-04-17 2010-05-11 Weatherford/Lamb, Inc. Top drive casing system
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US7845418B2 (en) 2005-01-18 2010-12-07 Weatherford/Lamb, Inc. Top drive torque booster
US7874352B2 (en) 2003-03-05 2011-01-25 Weatherford/Lamb, Inc. Apparatus for gripping a tubular on a drilling rig
US7882902B2 (en) 2006-11-17 2011-02-08 Weatherford/Lamb, Inc. Top drive interlock
US7887103B2 (en) 2003-05-22 2011-02-15 Watherford/Lamb, Inc. Energizing seal for expandable connections
US20110114391A1 (en) * 2008-04-28 2011-05-19 Dietmar Scheider Grip head for an earth boring unit
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Cited By (73)

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US4111388A (en) * 1977-05-18 1978-09-05 Presley J M Vertical pipe holding tool
FR2530723A1 (en) * 1982-07-26 1984-01-27 Uop Inc wellscreen a tubular base and connecting device of multiwell filter segments for oil well drilling
US5083356A (en) * 1990-10-04 1992-01-28 Exxon Production Research Company Collar load support tubing running procedure
DE19502355C1 (en) * 1995-01-26 1996-08-01 Wirth Co Kg Masch Bohr Ground=mounted support to grip vertically projecting component
US6161617A (en) * 1996-09-13 2000-12-19 Hitec Asa Device for connecting casings
US20060107514A1 (en) * 1997-03-21 2006-05-25 Weatherford Lamb, Inc. Expandable slotted tubing string and method for connecting such a tubing string
US7225523B2 (en) 1997-03-21 2007-06-05 Weatherford/Lamb, Inc. Method for coupling and expanding tubing
US5850766A (en) * 1997-05-16 1998-12-22 Stokes; Charles William Pipe joint break-out device
US6494273B1 (en) * 1998-05-12 2002-12-17 Richard Martin Elevator for supporting an elongate member such as a drill pipe
US7665531B2 (en) 1998-07-22 2010-02-23 Weatherford/Lamb, Inc. Apparatus for facilitating the connection of tubulars using a top drive
US20050051343A1 (en) * 1998-07-22 2005-03-10 Weatherford/Lamb, Inc. Apparatus for facilitating the connection of tubulars using a top drive
US6722443B1 (en) 1998-08-08 2004-04-20 Weatherford/Lamb, Inc. Connector for expandable well screen
US20040194968A1 (en) * 1998-08-08 2004-10-07 Weatherford/Lamb, Inc. Connector for expandable well screen
US20050199385A1 (en) * 1998-08-08 2005-09-15 Weatherford/Lamb, Inc. Connector for expandable well screen
US7140446B2 (en) 1998-08-08 2006-11-28 Weatherford/ Lamb, Inc. Connector for expandable well screen
US6896057B2 (en) 1998-08-08 2005-05-24 Weatherford/Lamb, Inc. Connector for expandable well screen
US7451826B2 (en) 1998-08-24 2008-11-18 Weatherford/Lamb, Inc. Apparatus for connecting tubulars using a top drive
WO2000011309A1 (en) * 1998-08-24 2000-03-02 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US6705405B1 (en) 1998-08-24 2004-03-16 Weatherford/Lamb, Inc. Apparatus and method for connecting tubulars using a top drive
US7669662B2 (en) 1998-08-24 2010-03-02 Weatherford/Lamb, Inc. Casing feeder
US6976298B1 (en) 1998-08-24 2005-12-20 Weatherford/Lamb, Inc. Methods and apparatus for connecting tubulars using a top drive
US6688398B2 (en) 1998-08-24 2004-02-10 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US20040149451A1 (en) * 1998-08-24 2004-08-05 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US6527047B1 (en) 1998-08-24 2003-03-04 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US7021374B2 (en) 1998-08-24 2006-04-04 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US7353880B2 (en) 1998-08-24 2008-04-08 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
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