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EP0162000A1 - Top drive well drilling apparatus with removable link adapter - Google Patents

Top drive well drilling apparatus with removable link adapter Download PDF

Info

Publication number
EP0162000A1
EP0162000A1 EP85630049A EP85630049A EP0162000A1 EP 0162000 A1 EP0162000 A1 EP 0162000A1 EP 85630049 A EP85630049 A EP 85630049A EP 85630049 A EP85630049 A EP 85630049A EP 0162000 A1 EP0162000 A1 EP 0162000A1
Authority
EP
European Patent Office
Prior art keywords
stem
drill string
link adapter
elevator
drilling apparatus
Prior art date
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.)
Withdrawn
Application number
EP85630049A
Other languages
German (de)
French (fr)
Inventor
William Roger Hamilton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hughes Tool Co
Original Assignee
Hughes Tool Co
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 Hughes Tool Co filed Critical Hughes Tool Co
Publication of EP0162000A1 publication Critical patent/EP0162000A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/02—Rod or cable suspensions

Definitions

  • This invention relates in general to a well drilling apparatus and in particular to a top drive well drilling apparatus.
  • a top drive drilling system rotates a drill string from the top, rather than using a rotary table, a kelly, and a kelly bushing.
  • An electric drilling motor is suspended from the drilling rig's conventional swivel and is attached to the top of the drilling string.
  • the drilling motor may also be attached to a carriage, which is guided by a pair of vertical tracks.
  • the drilling motor is connected to the drill string by a cyclindrical stem, which extends downward from the motor.
  • a wrench assembly is also suspended from the drilling motor, in order to brack out or make up connections between the stem and the drill string.
  • a link adapter on the stem, supports a pair of links, which in turn support an elevator below the bottom of the stem. As the drill string is drilled down, the elevator will contact the floor of the drilling rig. If the elevator and the wrench assembly could be moved out of the way, the drill string could be drilled down further before additional lengths of pipe must be added to the drill string.
  • the present invention is a top drive well drilling apparatus in which the link adapter is removable from the stem, so that link adapter, links, and elevator may be removed from the stem during drilling.
  • the link adapter and the stem have alignment means for aligning the link adapter on the stem, and a downward facing shoulder on the link adapter engages an upward facing shoulder on the stem.
  • the link adapter also has means for stabilizing the links and for tilting the links to a non-vertical position.
  • FIG. 1 illustrates a top drive well drilling apparatus of the invention.
  • a conventional traveling block 13 and a conventional hook 15 are suspended by cables 17 from the top of an oil we2i derrick.
  • a drive unit 19 is suspended from the hook 15 and mounted on a carriage 21.
  • the drive unit 19 is a drilling motor of a conventional type.
  • the carriage 21 guides the drive unit 19 up and down along a pair of vertical guide tracks 23.
  • a cylindrical quill, or stem 25, extends downward from the drive unit 19, and connects to the top of a drill string 27.
  • the drill string 27 consists of a: series of pipe sections and has a rotary rock bit attached at the bottom for drilling a well bore.
  • a wrench assembly 29 is provided for making up the connection between the stem 25 and the drill string 27.
  • the wrench assembly is mounted to the carriage 21, and is capable of moving between a working position along the stem 25, or the axis of the drill string 27, and a retracted position away from the axis of the drill string 27.
  • the wrench assembly 29 is also capable of moving vertically along the stem 25 and the drill string 27.
  • Figure 2 illustrates a portion of the top drive well drilling apparatus during a tripping operation.
  • the drill string 27 is not connected directly to the stem 25, but is suspended from a conventional pipe elevator 31.
  • the elevator 31 is suspended from a pair of links 33 which depend from a link adapter 35.
  • a link stabilizer 37 is connected between the link adapter 35 and the links 33.
  • the link stabilizer 37 stabilizes the links 33 and, in cooperation with a hydraulic cylinder 39, may also be used to tilt the links 33 to a non-vertical position.
  • the link stabilizer 37 is thus a stabilizing means for stabilizing the links 33, and is also a tilting means for tilting the links 33 to a non-vertical position.
  • a bell 41 is attached to the lower end of the stem 25 to facilitate makeup between the drill string 27 and the stem 25, if the drill string 27 and the stem 25 have to be reconnected while the link adapter 35 is still in place.
  • FIGs 3 and 4 are close-up views of the removable link adapter 35.
  • the link adapter 35 has a central bore 43, adapted to receive the stem 25.
  • the link adapter 35 has a door 45, which can be opened to allow the link adapter 35 to be placed around the stem 25. Once the link adapter 35 has been positioned on the stem 25, the door 45 may be secured with the pins 47.
  • the door 45 is adapted to engage an alignment dog 49 (shown in Fig. 1) on the stem 25.
  • the door 45 and the alignment dog 49 are thus an alignment means for aligning the link adapter 35 on the stem 25.
  • the bore 43 of the link adapter 35 has a downward facing shoulder 51, which is adapted to engage an upward facing shoulder 53 (shown in Fig. 1) on the stem.
  • the well drilling apparatus is in the configuration shown in Fig. 1 during the drilling of a well bore.
  • the drill string 27 must be removed from the well bore.
  • the drill string 27 must be removed from the well bore occasionally in order to replace a worn drill bit.
  • the process of removing the drill string 27 from the well bore, and then reinserting the drill string 27 back into the well bore, is known as a tripping operation.
  • the drill string 27 is not connected directly to the stem 25, but is suspended from a pipe elevator 41, as shown in Fig. 2.
  • slips in the floor of the drilling rig are first set to hold the weight of the drill string 27.
  • the wrench assembly 29 is then used to break out the connection between the drill string 27 and the stem 25.
  • the stem 25 is then raised to separate the stem 25 from the drill string 27.
  • the removable link adapter 35 is then placed around the stem 25, so that the downward facing shoulder 51 of the link adapter 35 engages the upward facing shoulder 53 on the stem 25.
  • the alignment dog 49 insures that the link adapter 35 is properly aligned on the stem 25.
  • the door 45 of the link adapter 35 is then closed and secured with pins 47.
  • the conventional elevator 31 is now supended below the link adapter 35 by the links 33.
  • the elevator 31 is then connected to the drill string 27 in a conventional manner.
  • the drill string 27 may be set in the slips while the stem 25 is lowered onto the drill string 27.
  • the bell 41 on the stem 25 will guide the drill string 27 to make a proper engagement.
  • the top drive well drilling apparatus of the invention has several significant advantages over the prior art. Since the links 33 and the elevator 31 do not hang down below the stem 25 during drilling, the drill string 27 can be drilled down further before additional lengths of pipe have to be added to the drill string. The invention also allows servicing or replacement of the link adapter 35, the links 33, and the elevator 31, without interrupting drilling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A well drilling apparatus having a drive unit for rotating a drill string (27). A stem (25) extends downward from the drive unit and during tripping a link adapter (35) is removably connected to the stem (25). During tripping, an elevator (31) is suspended from the link adapter (35) by a pair of links (33), and the drill string (27) is held by the elevator (31).

Description

  • This invention relates in general to a well drilling apparatus and in particular to a top drive well drilling apparatus.
  • A top drive drilling system rotates a drill string from the top, rather than using a rotary table, a kelly, and a kelly bushing. An electric drilling motor is suspended from the drilling rig's conventional swivel and is attached to the top of the drilling string. The drilling motor may also be attached to a carriage, which is guided by a pair of vertical tracks. The drilling motor is connected to the drill string by a cyclindrical stem, which extends downward from the motor. A wrench assembly is also suspended from the drilling motor, in order to brack out or make up connections between the stem and the drill string. A link adapter, on the stem, supports a pair of links, which in turn support an elevator below the bottom of the stem. As the drill string is drilled down, the elevator will contact the floor of the drilling rig. If the elevator and the wrench assembly could be moved out of the way, the drill string could be drilled down further before additional lengths of pipe must be added to the drill string.
  • The present invention is a top drive well drilling apparatus in which the link adapter is removable from the stem, so that link adapter, links, and elevator may be removed from the stem during drilling. The link adapter and the stem have alignment means for aligning the link adapter on the stem, and a downward facing shoulder on the link adapter engages an upward facing shoulder on the stem. The link adapter also has means for stabilizing the links and for tilting the links to a non-vertical position.
  • The above, as well as additional objects, features, and advantages of the invention, will become apparent in the following detailed description of the invention which is shown by way of example in the attached drawings, wherein:
    • Figure 1 is a perspective view of a drilling apparatus during a drilling operation;
    • Figure 2 is a side view of a link adapter, and an elevator during a tripping operation;
    • Figure 3 is a top view of a link adapter ; and
    • Figure 4 is a side view of a link adapter.
  • Figure 1 illustrates a top drive well drilling apparatus of the invention. A conventional traveling block 13 and a conventional hook 15 are suspended by cables 17 from the top of an oil we2i derrick. A drive unit 19 is suspended from the hook 15 and mounted on a carriage 21. The drive unit 19 is a drilling motor of a conventional type. The carriage 21 guides the drive unit 19 up and down along a pair of vertical guide tracks 23. A cylindrical quill, or stem 25, extends downward from the drive unit 19, and connects to the top of a drill string 27. The drill string 27 consists of a: series of pipe sections and has a rotary rock bit attached at the bottom for drilling a well bore.
  • A wrench assembly 29 is provided for making up the connection between the stem 25 and the drill string 27. The wrench assembly is mounted to the carriage 21, and is capable of moving between a working position along the stem 25, or the axis of the drill string 27, and a retracted position away from the axis of the drill string 27. The wrench assembly 29 is also capable of moving vertically along the stem 25 and the drill string 27.
  • Figure 2 illustrates a portion of the top drive well drilling apparatus during a tripping operation. The drill string 27 is not connected directly to the stem 25, but is suspended from a conventional pipe elevator 31. The elevator 31 is suspended from a pair of links 33 which depend from a link adapter 35. A link stabilizer 37 is connected between the link adapter 35 and the links 33. The link stabilizer 37 stabilizes the links 33 and, in cooperation with a hydraulic cylinder 39, may also be used to tilt the links 33 to a non-vertical position. The link stabilizer 37 is thus a stabilizing means for stabilizing the links 33, and is also a tilting means for tilting the links 33 to a non-vertical position. A bell 41 is attached to the lower end of the stem 25 to facilitate makeup between the drill string 27 and the stem 25, if the drill string 27 and the stem 25 have to be reconnected while the link adapter 35 is still in place.
  • Figures 3 and 4 are close-up views of the removable link adapter 35. The link adapter 35 has a central bore 43, adapted to receive the stem 25. The link adapter 35 has a door 45, which can be opened to allow the link adapter 35 to be placed around the stem 25. Once the link adapter 35 has been positioned on the stem 25, the door 45 may be secured with the pins 47. The door 45 is adapted to engage an alignment dog 49 (shown in Fig. 1) on the stem 25. The door 45 and the alignment dog 49 are thus an alignment means for aligning the link adapter 35 on the stem 25. The bore 43 of the link adapter 35 has a downward facing shoulder 51, which is adapted to engage an upward facing shoulder 53 (shown in Fig. 1) on the stem.
  • In operation, the well drilling apparatus is in the configuration shown in Fig. 1 during the drilling of a well bore. However, there are times when drilling must be stopped and the drill string 27 must be removed from the well bore. For example, the drill string 27 must be removed from the well bore occasionally in order to replace a worn drill bit. The process of removing the drill string 27 from the well bore, and then reinserting the drill string 27 back into the well bore, is known as a tripping operation. During a tripping operation the drill string 27 is not connected directly to the stem 25, but is suspended from a pipe elevator 41, as shown in Fig. 2.
  • In order to change from the drilling configuration (Fig. 1 ) to the tripping configuration (Fig. 2), slips in the floor of the drilling rig are first set to hold the weight of the drill string 27. The wrench assembly 29 is then used to break out the connection between the drill string 27 and the stem 25. The stem 25 is then raised to separate the stem 25 from the drill string 27. The removable link adapter 35 is then placed around the stem 25, so that the downward facing shoulder 51 of the link adapter 35 engages the upward facing shoulder 53 on the stem 25. The alignment dog 49 insures that the link adapter 35 is properly aligned on the stem 25. The door 45 of the link adapter 35 is then closed and secured with pins 47. The conventional elevator 31 is now supended below the link adapter 35 by the links 33. The elevator 31 is then connected to the drill string 27 in a conventional manner.
  • In order to return to the drilling configuration, the steps explained above are merely reversed. The slips in the floor of the drilling rig are set to hold the drill string 27. Then the elevator 31 is removed from the drill string 27, and the link adapter 35 is removed from the stem 25. The stem 25 is then lowered to the drill string 27, and the wrench assembly 29 is used to make up the connection.
  • If, for some reason, it becomes necessary to reconnect the drill string 27 to the stem 25 while the link adapter 45 is in place, the drill string 27 may be set in the slips while the stem 25 is lowered onto the drill string 27. The bell 41 on the stem 25 will guide the drill string 27 to make a proper engagement.
  • The top drive well drilling apparatus of the invention has several significant advantages over the prior art. Since the links 33 and the elevator 31 do not hang down below the stem 25 during drilling, the drill string 27 can be drilled down further before additional lengths of pipe have to be added to the drill string. The invention also allows servicing or replacement of the link adapter 35, the links 33, and the elevator 31, without interrupting drilling.
  • While the invention has been shown in only one of its forms, it should be apparent to those skilled in the art that it is not so limited, but is susceptible to various changes and modifications without departing from the spirit thereof.

Claims (5)

1. A well drilling apparatus, comprising :
a drive unit (19), for rotating a drill string (27) about the longitudinal axis of the drill string; and
a stem (25) extending downward from the drive unit (19) , to which the drill string (27) may be removably connected, for transmitting torque from the drive unit to the drill string; characterized by
a link adapter (35), removably connected to the stem (25), so that the link adapter may be removed from the stem during drilling;
a pair of elevator links (33) suspended from the link adapter (35) and
an elevator (31) suspended from the elevator links (33) for suspending the drill string (27) during tripping.
2. A wel- drilling apparatus according to claim 1, characterized by alignment means (45,49) for aligning the link adapter (35) on the stem (25).
3. A well drilling apparatus , according to claim 1 or 2, characterized in that said stem (25) has an upward facing shoulder (53) and that said link adapter (35) has a downward facing shoulder (51) for engagement with the shoulder (53) on the stem (25).
4. A well drilling apparatus according to anyone of the claims 1 to 3, characterized by an elevator, suspended from the elevator links, for stabilizing means (37) for stabilizing the links (33).
5. A well drilling apparatus according to anyone of the claims 1 to 4 characterized by tilting means (29,37) for tilting the links (33) to a non-vertical position.
EP85630049A 1984-04-16 1985-04-04 Top drive well drilling apparatus with removable link adapter Withdrawn EP0162000A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60091384A 1984-04-16 1984-04-16
US600913 1996-02-13

Publications (1)

Publication Number Publication Date
EP0162000A1 true EP0162000A1 (en) 1985-11-21

Family

ID=24405577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85630049A Withdrawn EP0162000A1 (en) 1984-04-16 1985-04-04 Top drive well drilling apparatus with removable link adapter

Country Status (2)

Country Link
EP (1) EP0162000A1 (en)
NO (1) NO851485L (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6622796B1 (en) 1998-12-24 2003-09-23 Weatherford/Lamb, Inc. Apparatus and method for facilitating the connection of 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
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
US6976298B1 (en) * 1998-08-24 2005-12-20 Weatherford/Lamb, Inc. Methods and apparatus for connecting tubulars using a top drive
WO2007064232A1 (en) * 2005-12-02 2007-06-07 Aker Kvaerner Mh As Top drive drilling apparatus
US7654325B2 (en) 2000-04-17 2010-02-02 Weatherford/Lamb, Inc. Methods and apparatus for handling and drilling with tubulars or casing
US7665531B2 (en) 1998-07-22 2010-02-23 Weatherford/Lamb, Inc. Apparatus for facilitating the connection of tubulars using a top drive
US7669662B2 (en) 1998-08-24 2010-03-02 Weatherford/Lamb, Inc. Casing feeder
US7690422B2 (en) 2006-02-08 2010-04-06 Pilot Drilling Control Limited Drill-string connector
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
US7757759B2 (en) 2006-04-27 2010-07-20 Weatherford/Lamb, Inc. Torque sub for use with top drive
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
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
WO2014178709A1 (en) * 2013-05-03 2014-11-06 Itrec B.V. A top drive well drilling installation
WO2019027647A1 (en) * 2017-08-03 2019-02-07 Forum Us, Inc. An elevator system and method with elevator link having integrated control lines

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967517A (en) * 1933-06-26 1934-07-24 Lester B Clark Method and apparatus for handling pipe in wells
FR2146954A1 (en) * 1971-07-28 1973-03-09 Hourcade Louis Drill shaft mounting apparatus - with automatic screw coupling, uncoupling and alignment
US3776320A (en) * 1971-12-23 1973-12-04 C Brown Rotating drive assembly
US3857450A (en) * 1973-08-02 1974-12-31 W Guier Drilling apparatus
US3915244A (en) * 1974-06-06 1975-10-28 Cicero C Brown Break out elevators for rotary drive assemblies
US4209066A (en) * 1978-11-17 1980-06-24 Watson Barry R Method and apparatus for running tubular goods into and out of a borehole
US4396216A (en) * 1980-09-18 1983-08-02 Hughes Tool Company Link engaging pipe elevator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967517A (en) * 1933-06-26 1934-07-24 Lester B Clark Method and apparatus for handling pipe in wells
FR2146954A1 (en) * 1971-07-28 1973-03-09 Hourcade Louis Drill shaft mounting apparatus - with automatic screw coupling, uncoupling and alignment
US3776320A (en) * 1971-12-23 1973-12-04 C Brown Rotating drive assembly
US3857450A (en) * 1973-08-02 1974-12-31 W Guier Drilling apparatus
US3915244A (en) * 1974-06-06 1975-10-28 Cicero C Brown Break out elevators for rotary drive assemblies
US4209066A (en) * 1978-11-17 1980-06-24 Watson Barry R Method and apparatus for running tubular goods into and out of a borehole
US4396216A (en) * 1980-09-18 1983-08-02 Hughes Tool Company Link engaging pipe elevator

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665531B2 (en) 1998-07-22 2010-02-23 Weatherford/Lamb, Inc. Apparatus for facilitating the connection of 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
US6688398B2 (en) 1998-08-24 2004-02-10 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
US6725938B1 (en) 1998-12-24 2004-04-27 Weatherford/Lamb, Inc. Apparatus and method for facilitating the connection of tubulars using a top drive
US6622796B1 (en) 1998-12-24 2003-09-23 Weatherford/Lamb, Inc. Apparatus and method for facilitating the connection of tubulars using a top drive
US7793719B2 (en) 2000-04-17 2010-09-14 Weatherford/Lamb, Inc. Top drive casing system
US7918273B2 (en) 2000-04-17 2011-04-05 Weatherford/Lamb, Inc. Top drive casing system
US7654325B2 (en) 2000-04-17 2010-02-02 Weatherford/Lamb, Inc. Methods and apparatus for handling and drilling with tubulars or casing
US7712523B2 (en) 2000-04-17 2010-05-11 Weatherford/Lamb, Inc. Top drive casing system
US7896084B2 (en) 2001-05-17 2011-03-01 Weatherford/Lamb, Inc. Apparatus and methods for tubular makeup interlock
US8517090B2 (en) 2001-05-17 2013-08-27 Weatherford/Lamb, Inc. Apparatus and methods for tubular makeup interlock
US6742596B2 (en) 2001-05-17 2004-06-01 Weatherford/Lamb, Inc. Apparatus and methods for tubular makeup interlock
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US7874352B2 (en) 2003-03-05 2011-01-25 Weatherford/Lamb, Inc. Apparatus for gripping a tubular on a drilling rig
US8567512B2 (en) 2003-03-05 2013-10-29 Weatherford/Lamb, Inc. Apparatus for gripping a tubular on a drilling rig
US10138690B2 (en) 2003-03-05 2018-11-27 Weatherford Technology Holdings, Llc Apparatus for gripping a tubular on a drilling rig
US7694744B2 (en) 2005-01-12 2010-04-13 Weatherford/Lamb, Inc. One-position fill-up and circulating tool and method
US7845418B2 (en) 2005-01-18 2010-12-07 Weatherford/Lamb, Inc. Top drive torque booster
GB2446744B (en) * 2005-12-02 2011-09-07 Aker Kvaerner Mh As Top drive drilling apparatus
GB2446744A (en) * 2005-12-02 2008-08-20 Aker Kvaerner Mh As Top drive drilling apparatus
WO2007064232A1 (en) * 2005-12-02 2007-06-07 Aker Kvaerner Mh As Top drive drilling apparatus
WO2007064231A1 (en) * 2005-12-02 2007-06-07 Aker Kvaerner Mh As Top drive drilling apparatus
US7743853B2 (en) 2005-12-02 2010-06-29 Aker Kvaerner Mh As Top drive drilling apparatus
US7931077B2 (en) 2005-12-02 2011-04-26 Aker Kvaerner Mh As Top drive drilling apparatus
GB2446106A (en) * 2005-12-02 2008-07-30 Aker Kvaerner Mh As Top drive drilling apparatus
GB2446106B (en) * 2005-12-02 2010-12-08 Aker Kvaerner Mh As Top drive drilling apparatus
US7690422B2 (en) 2006-02-08 2010-04-06 Pilot Drilling Control Limited Drill-string connector
US7757759B2 (en) 2006-04-27 2010-07-20 Weatherford/Lamb, Inc. Torque sub for use with top drive
US7882902B2 (en) 2006-11-17 2011-02-08 Weatherford/Lamb, Inc. Top drive interlock
WO2014178709A1 (en) * 2013-05-03 2014-11-06 Itrec B.V. A top drive well drilling installation
CN105189911A (en) * 2013-05-03 2015-12-23 伊特里克公司 Top drive drilling device
US10060187B2 (en) 2013-05-03 2018-08-28 Itrec B.V. Top drive well drilling installation
WO2019027647A1 (en) * 2017-08-03 2019-02-07 Forum Us, Inc. An elevator system and method with elevator link having integrated control lines
US10479644B2 (en) 2017-08-03 2019-11-19 Forum Us, Inc. Elevator system and method with elevator link having integrated control lines

Also Published As

Publication number Publication date
NO851485L (en) 1985-10-17

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