US3193116A - System for removing from or placing pipe in a well bore - Google Patents

System for removing from or placing pipe in a well bore Download PDF

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Publication number
US3193116A
US3193116A US23975062A US3193116A US 3193116 A US3193116 A US 3193116A US 23975062 A US23975062 A US 23975062A US 3193116 A US3193116 A US 3193116A
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Prior art keywords
transfer
pipe
elevator
derrick
hoists
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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John W Kenneday
William C Lindsey
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ExxonMobil Upstream Research Co
Esso Products Research Co
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ExxonMobil Upstream Research 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

Description

July 6, 1965 J. w. KENNEDAY ETAL 3, 93,116

SYSTEM FOR REMOVING FROM OR PLACING PIPE IN A WELL BORE Filed Nov. 25, 1962 4 Sheets-Sheet 1 l4 CROWN BLOCK TRANSFER PULLEYS 46 osnmcx IO DEAD LINE 4 SPLIT BIOZCK 41D TRANSFER 26 ELEVATOR POWER 36 WA DRILLER 42 i FLOOR 34 DRAW-WORKS POWER 20 SLIPS I I III v 1; I I I .l"..- AuToM/mc w '1 PIPE TROUGH I; l I 7 I V l 2 ROTARY JOHN w. KENNEDAYJ BY WILLIAM C.L'|NDSEY,

ATTORNEY July 6, 1965 J. w. KENNEDAY ETAL 3,193,116

SYSTEM FOR REMOVING FROM on PLACING PIPE IN A WELL BORE Filed Nov. 25, 1962 4 Sheets-Sheet 2 CROWN BLOCK TRANSFER PULLEYS FIG- 2- TRANSFER ELEVATOR J STABALIZING PIPE SPLIT BLOCK MOVING novm FLOOR-MAN AUTOMATIC =5 PIPE TROUGH ""H' fl 54 lllllll-llllllll TRANSFER ROTARY HOISTS 50 JOHN W. KENNEDAY.

B WILLIAM C. LINDSEY 7 M 3,1421

ATTORNEY.

.1955 J. w. KENNEDAY ETAL 3,193,116

SYSTEM FOR REMOVING FROM OR PLACING PIPE IN A WELL BORE Fil ed Nov. 25. 1962 4 Sheets-Sheet s TRANSFER PULLEYS TRANSFER ELEVATO PIPE LOWERING INTO TROUGH JOHN w. KENNEDAY; Y WILLIAM ouuossv.

IMA ,M M'VM PIPE TROUGH 54 ATTORNEY- July 6, 1965 J. w. KENNEDAY ETAL 3,193,116

SYSTEM FOR REMOVING FROM OR PLACING PIPE IN A WELL BORE Filed NOV. 23, 1962 4 Sheets-Sheet 4 FIG.7.

INVENTORS. JOHN W. KENNEDAY, BY WILLIAM C-LINDSEY,

f 1PM ALTA ATTORNEY United States Patent SYSTEM FOR REMOVING FROM OR PLACING PIPE IN A WELL BORE John W. Kenneday and William C. Lindsey, Corpus Christi, Tex., assignors, by mesne assignments, to Esso 7 Production Research Company, Houston, Tex., a corporation of Delaware Filed Nov. 23, 1962, Ser. No. 239,750 2 Claims. (Cl. 2142.5)

This invention relates to workover rigs for use in oil and gas production. More particularly, this invention is anew and improved system for removing pipe from a wellor placing pipe into a well.

Three and four man crews are presently employed on workover rigs with labor being a major expense. The system proposed herein for picking up and laying down pipe requires only two crewmen and may readily adapted to existing rigs.

The invention, as well as its many advantages, may be understood by reference to the following detailed description and drawings in which:

FIGS. 1, 2, and 3 are elevational views showing system in various stages of removing pipe from a well;

FIG. 4 is an elevational view on an enlarged scale of a portion of the apparatus shown in FIGS. l, 2, and 3;

FIG. 5 is a view taken along 55 of FIG. 4;

FIG. 6 is a view taken along line 6-6 of FIG. 4; and

FIG. 7 is an elevational view of the power system for independently operating the transfer elevators used in handling the pipe.

Referring to the drawings and more particularly to FIGS. 1, 2, and 3, a mast or derrick 10 is shown supported on a platform 12. Mounted on the top of the derrick 10 is a crown block including a plurality of pulleys 14 (only one being shown) on shaft 16. A main elevator line 18 is connected to and wound on draw works 20. The draw works 20 controls the operation and vertical movement of the split traveling block 22 supported by line 18.

The split traveling block 22 has depending therefrom a pair of hooked members 26 (see FIG. 6) each of which supports a main elevator bail 28. Each of the main elevator bails 28 is connected to a ring member 30 extending outwardly from the main elevator 32.

The new system includes a first transfer elevator 34, shown in FIG. 1 in position beneath the collar 36 of pipe 38, and a second transfer elevator 40 shown in FIG. 1 connected to a hook 42 located on the power tongs 44. The hook 42 may be located in any place convenient to the floorman. Transfer elevator 34 has its bail 35 connected to transfer line 37 with transfer line 37 extending upwardly over one of the pulleys of a double pulley system 46 and downwardly to transfer hoist drum 39. Transfer elevator 40 has its bail 41 connected to transfer line 43 which extends over the other pulley in the double pulley system 46 and downwardly to the transfer hoist drum 45.

A rotary table 50 and power operated pipe slips 52 are also included on the platform 12. A powered automatic pipe trough 54 is used to receive each pipe joint as the pipe joint is lowered by one of the transfer elevators 34 or 40.

As shown in FIGS 4, 5, and 6, each collar type tranfer elevator has a bore sufficiently small in diameter so that the transfer elevator when latched engages the lower shoulder formed by the under part of the pipe collar 36. The split traveling block 22 is provided with suflicient space 56 (see FIG. 5) to permit the transfer elevators and pipe collars to pass through the traveling block 22.

The main elevator 32 is provided with a bore 58. (See FIG. 6.) The diameter of the bore 58 is shorter than 3,193,116 Patented July 6, 1965 the outside diameters of the transfer elevators. Thus, the elevators 34 and 40 are adapted to rest upon the main elevator 32. However, the diameter of the bore 58 is greater than the diameter of the collar on the pipe so that the collar can pass through the main elevator 32.

In operating the new system to pull or remove pipe, the floorman operates the transfer elevators 34 and 4t), hoist drums 39 and 45, and power tongs 44. The power slips 52 and draw works 20 are operated by the driller.

As shown in FIG. 1, with the main elevator 32 below the collar 36, the floorman latches the transfer elevator 34 on pipe 38 between the main elevator 32 and the pipe collar 36. The hydraulic hoist drum 39 is set at this time to lift a load slightly less than the weight of a joint of pipe so that when raised, the joint of pipe is supported in an upright position but will not jump free when the joint is disconnected. The driller then raises the pipe 38 by operating the draw works 20.

As shown in FIG. 2, the slips 52 are then set and the traveling block 22 lowered below the collar 36. The hydraulic hoist drum 39 holds the transfer elevator 34 in place as the split traveling block 22 and main elevator 32 are lowered by the driller. As the main elevator 32 is lowered, the floorman backs out pipe 38 with the auto matic power tongs 44.

As shown in FIG. 3, the pipe section 38 has been disconnected and the power tongs 44 disengaged by the floorman. While this is being done, the driller has operated the draw works 20 to lower the main elevator 32 to below the collar 60 of pipe section 48. The floorman then latches the second transfer elevator 40 around the pipe section 48 between the collar 60 and the main elevator 32 and directs his attention to laying down the pipe section 38 in the pipe trough 54. The floorman then removes the transfer elevator 34 from the pipe 38 and places it on the hook 42. Meanwhile, the driller operates the draw works 20 to raise the pipe 48; and then the power slips 52 are released. Pipe section 48 is then raised to the position assumed by pipe section 38 in FIG. 2, and the power slips 52 are again engaged to support the pipe string.

The above series of steps is then repeated using transfer elevator 40 instead of transfer elevator 34. The steps are continuously repeated alternately using transfer elevator 34 and transfer elevator 40 until the entire pipe string is removed.

When running pipe, as a joint in the derrick is lowered, the floorman picks up a joint from the trough 54 using one transfer elevator and hydraulic hoist. The driller sets the slips 52; the floorman stabs the joint and removes the lower transfer elevator. As the split traveling block 22 and main elevator 32 are raised, the floorman makes up the joint in the derrick with the automatic power tongs 44. The driller picks up the joint and releases the slips 52. Then the cycle is repeated.

FIG. 7 shows the system for operating the transfer hoist drums 39 and 45 which control transfer, elevator lines 37 and 43, respectively. Hydraulic or pneumatic power is fed to a control box 70 through hydraulic or pneumatic power line 72. Control knob 74 controls the power fed through line 76 to control hoist drum 39. Control knob 78 controls the hydraulic or pneumatic power fed through line 80 to control hoist drum 45. Each control knob has:

(1) A tension position which is used to hold the pipe upright when disconnecting or connecting the pipe while in an upright position;

(2) A pickup position used to transfer the pipe from the derrick to the trough; and

(3) A slack-off posit-ion used to return the transfer elevator from the top of the derrick to a position to engage another pipe joint collar.

Tong control knob til controls the application of power from and placing pipeti-n a wellicomprisingz a main ele-' vator provided with-a borei large enoughto provide s-uffi-e cient inside:diameter to passbthe pipe-collars; arpairof transfer elevators, each transfer'elevator having an out-. w 1

side diameter sufiicientlyila-rgee to permitengagernent with the main elevator and having a bore sufficiently small in diameter to engage beneath. the pipe collars; acrown block; a double pulley amounted On'the'derrick adjacent.

the top thereof; a draw works-onthe floor of the derrick;

transfer hoists on the floor or the derrick; a' pipe trough located adjacent the floor of the derrickyrneans including a main elevator line-connected to the drawworksxand depending from the crown block, and controlled rby the drawworks, for raising and lowering the main elevator; at

first transfer line connected to the transfer hoists'and extending around the double pulley'a'nd connected't'o one of the transfer elevators and, controlled by-the transfer hoists for. raising pipefrorn the'well and lowering said pipe in the pipe trough;;and a second transfer line con-' nected to the transfer hoists and extending around the double pulley and connected totheother transfer eleva-' I tor and COIIHOHEdzbY the transfer hoists for raising pipe fromthe well and lowering said pipe in the pipe trough", i

2. A system for use on a1 well derrick fon-removing the transfer elevators and to the tongs through lines 84 and 86. Rack control knob pipe collars to pass therethrough;-a r nain'elevator suspended from the block member and having a vbore with a diameter larger than the diameter of the collars and shorter than the outside diameters of the transfer elevators; a crown block; a double pulley mounted on the vderrick adjacent the top thereof; a drawworks on the floor of the derrick; transfer hoists on the floor of the derrick; a pipe trough located adjacent the floor of thegderriick; a main elevator {line ,conneetedito the bl-ockmemher and depending from the crown block and controlled by'the draw works forraising and lowering the main elevator; a first transfer line connected to the transferhoists and extending around the double pulley and connected to one of the transfer elevators and controlled by the transfer hoists for raising pipe from the well and lowering'said pipein the pipe trough;

Y an-da second transfer line connected to'the transfer hoists fR fj et l C t g y he mama UNITED STATES PATEN'rsg HuGoo. sctturz, P tt-y Eaczirniner i MORRIS TEMIN, Examiner the well and lowering said

Claims (1)

1. A SYSTEM FOR USE ON A WELL DERRICK REMOVING FROM AND PLACING PIPE IN WELL COMPRISING: A MAIN ELEVATOR PROVIDED WITH A BORE LARGE ENOUGH TO PROVIDE SUFFICIENT INSIDE DIAMETER TO PASS THE PIPE COLLARS; A PAIR OF TRANSFER ELEVATORS, EACH TRANSFER ELEVATOR HAVING AN OUTSIDE DIAMETER SUFFICIENTLY LARGE TO PERMIT ENGAGEMENT WITH THE MAIN ELEVATOR AND HAVING A BORE SUFFICIENTLY SMALL IN DIAMETER TO ENGAGE BENEATH THE PIPE COLLARS; A CROWN BLOCK; A DOUBLE PULLEY MOUNTED ON THE DERRICK ADJACENT THE TOP THEREOF; A DRAW WORKS ON THE FLOOR OF THE DERRICK; TRANSFER HOISTS ON THE FLOOR OF THE DERRICK; A PIPE THROUGH LOCATED ADJACENT THE FLOOR OF THE DERRICK; MEANS INCLUDING A MAIN ELEVATOR LINE CONNECTED TO THE DRAW WORKS AND DEPENDING FROM THE CROWN BLOCK AND CONTROLLED BY THE DRAW WORKS FOR RAISING AND LOWERING THE MAIN ELEVATOR; A FIRST TRANSFER LINE CONNECTED TO THE TRANSFER HOISTS AND EXTENDING AROUND THE DOUBLE PULLEY AND CONNECTED TO ONE OF THE TRANSFER ELEVATORS AND CONTROLLED BY THE TRANSFER HOISTS FOR RAISING PIPE FROM THE WELL AND LOWERING SAID
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US3280920A (en) * 1964-03-18 1966-10-25 Hycalog Inc Portable apparatus for drilling slim hole wells
US3351372A (en) * 1966-05-02 1967-11-07 Dresser Ind Split hook hoisting apparatus
US3865256A (en) * 1973-11-08 1975-02-11 Sr Richard B Freeman Casing and drill pipe handling device
US3960360A (en) * 1972-06-27 1976-06-01 Thomas L. Elliston Internally pressurized load supporting mast
US3967735A (en) * 1974-01-28 1976-07-06 Alexander William Payne Cranes with look independent of sheave block
US4417846A (en) * 1977-12-09 1983-11-29 Hydra-Rig, Inc. Traveling block elevator latch assembly
US4834441A (en) * 1987-11-25 1989-05-30 Ingersoll-Rand Company Drill pipe handling device
US5850877A (en) * 1996-08-23 1998-12-22 Weatherford/Lamb, Inc. Joint compensator
US6056060A (en) * 1996-08-23 2000-05-02 Weatherford/Lamb, Inc. Compensator system for wellbore tubulars
US6073699A (en) * 1998-03-06 2000-06-13 Weatherford/Lamb, Inc. Single joint elevator
WO2000052297A3 (en) * 1999-03-05 2000-12-21 Varco Int Pipe running tool
US6527047B1 (en) 1998-08-24 2003-03-04 Weatherford/Lamb, Inc. Method and apparatus for connecting tubulars using a top drive
US6536520B1 (en) 2000-04-17 2003-03-25 Weatherford/Lamb, Inc. Top drive casing system
US20030141111A1 (en) * 2000-08-01 2003-07-31 Giancarlo Pia Drilling method
US6622796B1 (en) 1998-12-24 2003-09-23 Weatherford/Lamb, Inc. Apparatus and method for facilitating the connection of tubulars using a top drive
US6637526B2 (en) 1999-03-05 2003-10-28 Varco I/P, Inc. Offset elevator for a pipe running tool and a method of using a pipe running tool
US20030221519A1 (en) * 2000-03-14 2003-12-04 Haugen David M. Methods and apparatus for connecting tubulars while drilling
US6691801B2 (en) 1999-03-05 2004-02-17 Varco I/P, Inc. Load compensator for a pipe running tool
US20040045717A1 (en) * 2002-09-05 2004-03-11 Haugen David M. Method and apparatus for reforming tubular connections
US6705405B1 (en) 1998-08-24 2004-03-16 Weatherford/Lamb, Inc. Apparatus and method for connecting tubulars using a top drive
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
US20040251025A1 (en) * 2003-01-30 2004-12-16 Giroux Richard L. Single-direction cementing plug
US6976298B1 (en) 1998-08-24 2005-12-20 Weatherford/Lamb, Inc. Methods and apparatus for connecting tubulars using a top drive
US6994176B2 (en) 2002-07-29 2006-02-07 Weatherford/Lamb, Inc. Adjustable rotating guides for spider or elevator
US7004264B2 (en) 2002-03-16 2006-02-28 Weatherford/Lamb, Inc. Bore lining and drilling
US7013997B2 (en) 1994-10-14 2006-03-21 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7036610B1 (en) 1994-10-14 2006-05-02 Weatherford / Lamb, Inc. Apparatus and method for completing oil and gas wells
US7040420B2 (en) 1994-10-14 2006-05-09 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US20060113087A1 (en) * 2004-11-30 2006-06-01 Springett Frank B Methods and apparatuses for wellbore operations
US20060118293A1 (en) * 1999-03-05 2006-06-08 Daniel Juhasz Pipe running tool having internal gripper
US20060124305A1 (en) * 1999-03-05 2006-06-15 Daniel Juhasz Pipe running tool having a cement path
US20060124353A1 (en) * 1999-03-05 2006-06-15 Daniel Juhasz Pipe running tool having wireless telemetry
US20060124293A1 (en) * 1999-03-05 2006-06-15 Daniel Juhasz Pipe running tool having a primary load path
US7083005B2 (en) 2002-12-13 2006-08-01 Weatherford/Lamb, Inc. Apparatus and method of drilling with casing
US7090023B2 (en) 2002-10-11 2006-08-15 Weatherford/Lamb, Inc. Apparatus and methods for drilling with casing
US7096982B2 (en) 2003-02-27 2006-08-29 Weatherford/Lamb, Inc. Drill shoe
US7100710B2 (en) 1994-10-14 2006-09-05 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7100713B2 (en) 2000-04-28 2006-09-05 Weatherford/Lamb, Inc. Expandable apparatus for drift and reaming borehole
US7108084B2 (en) 1994-10-14 2006-09-19 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7117957B2 (en) 1998-12-22 2006-10-10 Weatherford/Lamb, Inc. Methods for drilling and lining a wellbore
US7131505B2 (en) 2002-12-30 2006-11-07 Weatherford/Lamb, Inc. Drilling with concentric strings of casing
US7137454B2 (en) 1998-07-22 2006-11-21 Weatherford/Lamb, Inc. Apparatus for facilitating the connection of tubulars using a top drive
US7140445B2 (en) 1997-09-02 2006-11-28 Weatherford/Lamb, Inc. Method and apparatus for drilling with casing
US7147068B2 (en) 1994-10-14 2006-12-12 Weatherford / Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7165634B2 (en) 1994-10-14 2007-01-23 Weatherford/Lamb, Inc. Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7188687B2 (en) 1998-12-22 2007-03-13 Weatherford/Lamb, Inc. Downhole filter
US7191840B2 (en) 2003-03-05 2007-03-20 Weatherford/Lamb, Inc. Casing running and drilling system
US20070062705A1 (en) * 2005-09-20 2007-03-22 Mike Schats Wellbore rig elevator systems
US20070062688A1 (en) * 2005-09-20 2007-03-22 Mike Schats Support link for wellbore apparatus
US7228901B2 (en) 1994-10-14 2007-06-12 Weatherford/Lamb, Inc. Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7264067B2 (en) 2003-10-03 2007-09-04 Weatherford/Lamb, Inc. Method of drilling and completing multiple wellbores inside a single caisson
US7284617B2 (en) 2004-05-20 2007-10-23 Weatherford/Lamb, Inc. Casing running head
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US7311148B2 (en) 1999-02-25 2007-12-25 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US7325610B2 (en) 2000-04-17 2008-02-05 Weatherford/Lamb, Inc. Methods and apparatus for handling and drilling with tubulars or casing
US7334650B2 (en) 2000-04-13 2008-02-26 Weatherford/Lamb, Inc. Apparatus and methods for drilling a wellbore using casing
US7360594B2 (en) 2003-03-05 2008-04-22 Weatherford/Lamb, Inc. Drilling with casing latch
US7370707B2 (en) 2003-04-04 2008-05-13 Weatherford/Lamb, Inc. Method and apparatus for handling wellbore tubulars
US7413020B2 (en) 2003-03-05 2008-08-19 Weatherford/Lamb, Inc. Full bore lined wellbores
US7503397B2 (en) 2004-07-30 2009-03-17 Weatherford/Lamb, Inc. Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly
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US20090252589A1 (en) * 2004-05-01 2009-10-08 Leendert Adriaan Marinus Sonneveld Apparatus and method for handling pipe
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Cited By (121)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280920A (en) * 1964-03-18 1966-10-25 Hycalog Inc Portable apparatus for drilling slim hole wells
US3351372A (en) * 1966-05-02 1967-11-07 Dresser Ind Split hook hoisting apparatus
US3960360A (en) * 1972-06-27 1976-06-01 Thomas L. Elliston Internally pressurized load supporting mast
US3865256A (en) * 1973-11-08 1975-02-11 Sr Richard B Freeman Casing and drill pipe handling device
US3967735A (en) * 1974-01-28 1976-07-06 Alexander William Payne Cranes with look independent of sheave block
US4417846A (en) * 1977-12-09 1983-11-29 Hydra-Rig, Inc. Traveling block elevator latch assembly
US4834441A (en) * 1987-11-25 1989-05-30 Ingersoll-Rand Company Drill pipe handling device
US7036610B1 (en) 1994-10-14 2006-05-02 Weatherford / Lamb, Inc. Apparatus and method for completing oil and gas wells
US7100710B2 (en) 1994-10-14 2006-09-05 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7228901B2 (en) 1994-10-14 2007-06-12 Weatherford/Lamb, Inc. Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7108084B2 (en) 1994-10-14 2006-09-19 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7165634B2 (en) 1994-10-14 2007-01-23 Weatherford/Lamb, Inc. Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7147068B2 (en) 1994-10-14 2006-12-12 Weatherford / Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7013997B2 (en) 1994-10-14 2006-03-21 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7040420B2 (en) 1994-10-14 2006-05-09 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US6056060A (en) * 1996-08-23 2000-05-02 Weatherford/Lamb, Inc. Compensator system for wellbore tubulars
US6000472A (en) * 1996-08-23 1999-12-14 Weatherford/Lamb, Inc. Wellbore tubular compensator system
US5850877A (en) * 1996-08-23 1998-12-22 Weatherford/Lamb, Inc. Joint compensator
US7140445B2 (en) 1997-09-02 2006-11-28 Weatherford/Lamb, Inc. Method and apparatus for drilling with casing
US7509722B2 (en) 1997-09-02 2009-03-31 Weatherford/Lamb, Inc. Positioning and spinning device
US6073699A (en) * 1998-03-06 2000-06-13 Weatherford/Lamb, Inc. Single joint elevator
US7137454B2 (en) 1998-07-22 2006-11-21 Weatherford/Lamb, Inc. Apparatus for facilitating the connection of tubulars using a top drive
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