EP1931851B1 - Vorrichtung zum greifen eines bohrlochrohrs - Google Patents

Vorrichtung zum greifen eines bohrlochrohrs Download PDF

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Publication number
EP1931851B1
EP1931851B1 EP05775179A EP05775179A EP1931851B1 EP 1931851 B1 EP1931851 B1 EP 1931851B1 EP 05775179 A EP05775179 A EP 05775179A EP 05775179 A EP05775179 A EP 05775179A EP 1931851 B1 EP1931851 B1 EP 1931851B1
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EP
European Patent Office
Prior art keywords
tubular
coupler
top end
gripping
shoulder
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.)
Not-in-force
Application number
EP05775179A
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English (en)
French (fr)
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EP1931851A1 (de
Inventor
Joop Roodenburg
Diederick Bernadus Wijning
Cornelius Hendricus Van Der Knaap
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Huisman Equipment BV
Original Assignee
Itrec BV
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Publication date
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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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves
    • 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

Definitions

  • the present invention relates to an apparatus for gripping a downhole tubular for use in an oil and gas drilling system and the like.
  • Drilling methods are known wherein a so-called top drive mechanism is used to rotate the string of drill pipe joints.
  • a top drive mechanism comprises a body commonly suspended from a travelling block of a drilling rig and moveable vertically along the well bore axis.
  • the top drive mechanism furthermore commonly comprises a motor (e.g. an electric or hydraulic motor) secured to the body and having a rotatable output member.
  • a motor e.g. an electric or hydraulic motor
  • top drive mechanism with an apparatus for gripping and suspending a downhole tubular.
  • This apparatus is in general arranged beneath the motor of the top drive and interconnected thereto, so that not only the tubular can be raised and lowered but also a rotary motion can be imparted to the downhole tubular if desired, e.g. for drilling operations.
  • a known apparatus for gripping and suspending a downhole tubular includes a series of clamping jaws arranged in the housing of the apparatus and adapted to clampingly engage on the exterior of a drill pipe or casing pipe in a region remote from the top end of the pipe. This is done to avoid damage to the threaded top end of the pipe.
  • Such an apparatus is disclosed in US 6,637,526 .
  • tubulars wherein the top end is provided with an enlarged diameter coupler (the "box” as it is generally referred to for drill pipe, whereas the lower end is provided with a screwthreaded end referred to as the "pin") or the threaded end of a casing pipe (which is often not provided with an enlarged diameter coupler).
  • the box as it is generally referred to for drill pipe
  • the lower end is provided with a screwthreaded end referred to as the "pin” or the threaded end of a casing pipe (which is often not provided with an enlarged diameter coupler).
  • tubulars handled by an apparatus for gripping and suspending as herein described are e.g. well linings.
  • An object of the invention is to provide an improved apparatus for gripping and suspending a downhole tubular.
  • a further object of the invention is to provide an apparatus, which allows for the transmission of a high torque, without compromising the part of the tubular gripped by the apparatus.
  • a further object of the invention is to provide an apparatus, which can be operated safe and reliable.
  • the apparatus of the invention grips the coupler on the outside.
  • drill pipe joints commonly have such a coupler (the box) which has a larger outer diameter than the drill pipe section and also is often made of a different steel and/or hardened, and commonly provided with a rugged coarse internal (conical) thread for interconnecting drill pipes.
  • the gripping of the outside of the coupler can thus be effected with high loads on the coupler, without unacceptable damage to the coupler and also the diameter of the gripped surface is greater than the diameter of the pipe section. Both effects allow the transmission of a high torque to the drill pipe and a reliable grip on the coupler.
  • the apparatus also provides a support engaging the underside of the shoulder of the downhole tubular. This amongst others reliably prevents the tubular from disengaging from the apparatus and dropping down, e.g. into the well bore. This could e.g. be effective when the gripping members loose their grip on the coupler (e.g. the gripping members and/or the actuating means thereof becoming defective).
  • the "shoulder” may be formed in different ways depending on the composition of the downhole tubular.
  • One option is that the coupler itself, e.g. the lower end, forms the shoulder thereof.
  • drill pipes provided with an "upset” at the upper end thereof, which is commonly obtain by forging the upper end to obtain a section of increasing thickness and with a conical widening other diameter towards the upper end of the drill pipes.
  • the coupler is then fitted, e.g. welded.
  • the upset could provide the "shoulder” under which the shoulder support of the apparatus engages. This would even provide “drop down protection" of the drill pipe (or drill string of interconnected drill pipes) in the unlikely event that the coupler would become detached from the upset of the drill pipe, e.g. due to a defective or damaged weld.
  • the apparatus is designed such that upon insertion of the tubular top end into the reception chamber first the one or more shoulder support members are brought into their active position, then the shoulder is brought to bear on the one or more shoulder support members (e.g. by lifting the apparatus with respect to the tubular). Thereafter the gripping members are brought into tight gripping engagement with the coupler.
  • the apparatus according to the invention is integrated in a top drive mechanism, but other applications, e.g. for lifting etc. of downhole tubulars in oil and gas drilling operations and the like are also feasible.
  • the invention achieves one or more of the above objectives by providing an apparatus according to claim 1.
  • the invention also relates to a top drive mechanism including an apparatus for gripping and suspending a downhole tubular as herein described.
  • the invention also relates to a drilling rig including such a top drive mechanism, as well as to a drilling method wherein use is made of the apparatus for drilling and suspending a downhole tubular as herein described.
  • Figures 1 and 2 show a downhole tubular gripping and suspending apparatus 1 adapted for gripping a downhole tubular 100 and suspending said downhole tubular 100 from said apparatus 1.
  • the apparatus 1 as depicted is adapted to be integrated into a top drive drilling mechanism.
  • the apparatus 1 has a housing 2 fitted with a central shaft 3, which central shaft 3 is provided with a connector (not shown) for connecting the central shaft to a motor of a top drive drilling mechanism.
  • a top drive drilling mechanism is movable up and down in a drilling rig, e.g. suspended from a travelling block of the rig, so that the gripped and suspended tubular, e.g. a string of drill pipes or casing pipes can be raised or lowered (into the well bore).
  • the housing 2 By its connection to the top drive motor, the housing 2 can be made to rotate and thereby the gripped and suspended tubular can also be made to rotate, e.g. for effecting rotation of a drill bit or the like connected to the tubular.
  • Such a rotary top drive mechanisme could also be employerd for interconnecting and/or decoupling screwthreaded tubulars.
  • the tubular 100 here is a common drill pipe, e.g. of a 30 ft length, having a tubular pipe section 101 of essentially uniform diameter and a top end provided with a coupler 102, generally called the box, for interconnecting tubulars 100.
  • the coupler 102 has an enlarged diameter part of greater diameter than the pipe section 101.
  • the top end of said tubular 100 also has an exterior shoulder 103, here a conical shoulder forming the transition between the pipe section exterior and the enlarged diameter part of the coupler 102.
  • the coupler 102 has a tapering internal screw thread for interconnecting tubulars.
  • the housing 2 in general forms a reception chamber 5, here with a bottom opening 6 for introducing said top end of said tubular 100 into the reception chamber 5 via said bottom opening 6.
  • external coupler gripping means are arranged for gripping the coupler 102 in such a manner that a tight grip is obtained and large torsional forces can be transmitted from the motor of the top drive to the coupler 102 and thus to the tubular 100.
  • the coupler gripping means include multiple coupler gripping members, distributed around the reception chamber for the tubular top end, so as to engage on the coupler at circumferentially spaced locations (see also figure 4 ).
  • the gripping members each are designed here as a clamping jaw 20, slidable along an associated guide 21 of the housing 2.
  • the guides 21 each form a guide surface 22 tapering to a reduced diameter in the direction of the bottom opening 6 so that when the clamping jaws 20 advance towards said bottom opening 6 said clamping jaws move into their active position and a clamping surface 23 of each clamping jaw grips enlarged diameter part of the coupler 102.
  • a clamping surface 23 can be of a grip enhancing design, e.g. with a roughened surface or the like.
  • the apparatus 1 further includes shoulder support means including one or more shoulder support members 30 moveable mounted on said housing and adapted to engage under said shoulder 103 of a tubular top end 100 received in said reception chamber 5.
  • multiple shoulder support members 30 are provided, distributed about the reception chamber 5 for the tubular top end, here near the bottom opening 6, so as to engage under the shoulder 103 at circumferentially spaced support locations (see also figure 3 ).
  • three shoulder support members 30 are used.
  • each shoulder support member 30 is pivotable about an associated pivot axis 31, here about a pivot axis in a plane at right angles to the tubular 100 to be supported.
  • each support member 30 can be moved between a raised inactive position (see right-hand side in figures 1 , 2 ) and a lowered active position (see left-hand side in figures 1 , 2 ).
  • the housing 2 Below each of the shoulder support members 30 the housing 2 provides a stop 32 for abutment of the shoulder support member 30 in its active position, so that the force by the tubular 100 on the shoulder support is directly transferred to the housing. It is noted that this force could be enormous, e.g. several hundreds of tonnes (e.g. over 200 tonnes), e.g. due to the weight of the drill string, the force required to pull the drill string from a well bore, etc.
  • each pivotable shoulder support member 30 is linked to a clamping member 20 located essentially above the shoulder support member, here via an associated connector rod 35.
  • each connector rod 35 is pivoted to the support member 30 at a distance remote from the associated pivot axis 30 via a hinge 36.
  • the other end of the rod 35 is pivoted to a clamping jaw 20, wherein the pivot axis 37 is guided in an elongated slot 26 of the jaw, extending essentially in the direction of the tubular to be supported.
  • each jaw 20 is connected by an associated connecting rod 40 to a common ring member 41 which is slideable with respect to the housing 2.
  • the connecting rods 40 are pivotable connected at both ends thereof.
  • the apparatus 1 has a spring 50 which is arranged here such that the spring urges the clamping jaws to their active position.
  • the spring 50 here is common for all clamping jaws 20, but it can also be envisaged that each jaw 20 is associated with its own spring.
  • the spring 50 here is arranged around the shaft and here is capable of exerting a significant force (the diameter of the shaft could e.g. be 300 mm).
  • the spring rests at its upper end against an support ring 51 fitted on the shaft 3.
  • the lower end of the spring 50 acts on the ring member 41 and urges the ring member 41 downwards.
  • intermediate ring members 42, 43 are positioned between the lower spring end and the ring member 41.
  • a power actuator for compressing the spring 50, that is raising the ring member 41 in this embodiment, a power actuator, here a hydraulic actuator 70 is provided.
  • the actuator 70 also allows for the exertion of a downwards force on the ring member 41 and thus on the clamping jaws 20.
  • the actuator 70 is of annular design having an inner ring wall 71 supported by suitable bearings 72 on the shaft 3 (above the spring 50) and an outer wall 73 slidable up and down with respect to the inner wall 71.
  • the outer wall 73 is connected by roller bearings 75 to an intermediate ring member 43.
  • the inner wall 71 is fitted with an annular piston 74 to form a lower and upper variable hydraulic chamber 76a, 76b to which hydraulic fluid can be supplied by a suitable hydraulic power pack.
  • the central shaft 3 here is provided with a central fluid channel 80 extending from an upper mouth to a fluid connector device extending in the reception chamber 5, said fluid connector device being adapted to connect to the tubular 100 so as to establish a fluid connecting between said tubular 100 and said central fluid channel 80, e.g. to feed drilling mud into the tubular during drilling operations.
  • the fluid connector comprises a tube part 85 connected to the housing 2 and in communication with the central fluid channel 80, said tube part being insertable into the top end of the tubular 100.
  • a sealing arrangement provided for establishing a fluid seal between said tube part and the tubular top end.
  • the sealing arrangement includes a sealing ring 86 extending around the tube part 85 and slideable with respect to said tube part along a sliding section thereof, while maintaining a fluid seal between said ring 86 and said tube part 85, said ring 86 being dimensioned to sealingly engage the top end of the tubular 100.
  • a spring 87 is provided for urging said sealing ring 86 in sealing engagement with said tubular 100.
  • the apparatus 1 is then lowered onto the top end of the tubular 100, so that the coupler 102 enters the reception chamber 5 via bottom opening 6.
  • the front face of the tubular 100 comes to bear against the sealing ring 86. (see figure 5b ).
  • the hydraulic actuator 70 is operated to allow for expansion (lengthwise) of the spring 50, so that the jaws 20 are lowered along their guides 21.
  • the shoulder support members 30 reach their active position resting now on the stops 31 of the housing 2. (see figure 5c ).
  • the apparatus 1 is lifted with respect to the tubular 100 which causes the shoulder 103 of the tubular 100 to come to firmly bear on the support members 30 (see figures 5d and e ).
  • a preferred detail of the support members 30 is that in the active position the contact surface with the shoulder 30 is located above the pivot axis 31, with the effect that any downward movement of the tubular 100 results in a tighter clamping of the shoulder by said support members 30.
  • the present invention also relates to a downhole tubular gripping and suspending apparatus adapted for gripping a downhole tubular and suspending said downhole tubular fDrom said apparatus, said downhole tubular having a tubular pipe section of essentially uniform diameter and a top end of said tubular having a coupler for interconnecting tubulars, said top end of said tubular also having an exterior shoulder, wherein said apparatus comprises:

Claims (16)

  1. Bohrlochrohr-Greif- und -Aufhängungsvorrichtung (1), die dazu ausgelegt ist, ein Bohrlochrohr zu greifen und das Bohrlochrohr (100) von der Vorrichtung herabhängen zu lassen, wobei das Rohr einen Röhrenabschnitt (101) mit im Wesentlichen gleichmäßigem Durchmesser besitzt, wobei ein oberes Ende des Rohrs eine Kupplung (102) für die Verbindung von Rohren miteinander besitzt, wobei die Kupplung einen Abschnitt mit vergrößertem Durchmesser besitzt und wobei das obere Ende des Rohrs außerdem eine Außenschulter (103) besitzt,
    wobei die Vorrichtung umfasst:
    - ein Gehäuse (2), das eine Aufnahmekammer (5) mit wenigstens einer unteren Öffnung (6) zum Einführen des oberen Endes des Rohrs in die Aufnahmekammer durch die untere Öffnung besitzt;
    - äußere Kupplungsgreifmittel, die umfassen:
    - ein oder mehrere Kupplungsgreifelemente (20), die an dem Gehäuse beweglich angebracht und dazu ausgelegt sind, eine Außenseite des Abschnitts mit vergrößertem Durchmesser der Kupplung (102) des oberen Endes des Rohrs, das in der Aufnahmekammer (5) aufgenommen ist, zu greifen,
    - Betätigungsmittel (40, 41, 42, 43, 50, 70), die eine Bewegung des einen oder der mehreren Kupplungsgreifelemente zwischen einer inaktiven Position, in der das Einführen des oberen Endes des Rohrs in die Aufnahmekammer möglich ist, und einer aktiven Position, in der die Kupplung durch die Kupplungsgreifelemente ergriffen ist, hervorrufen;
    dadurch gekennzeichnet, dass die Vorrichtung ferner umfasst:
    - Schulterunterstützungsmittel, die enthalten:
    - ein oder mehrere Schulterunterstützungselemente (30), die an dem Gehäuse (2) beweglich angebracht und dazu ausgelegt sind, unter der Schulter (103) eines oberen Endes des Rohrs, das in der Aufnahmekammer aufgenommen ist, in Eingriff zu gelangen,
    - Betätigungsmittel (35, 40, 41, 42, 43, 50, 70), die die Verlagerung jedes Schulterunterstützungselements zwischen einer inaktiven Position, die das Einführen des oberen Endes des Rohrs in die Aufnahmekammer ermöglicht, und einer aktiven Position, in der das Schulterunterstützungselement (30) unter der Schulter (103) in Eingriff ist, ermöglichen.
  2. Vorrichtung nach Anspruch 1, wobei mehrere Schulterunterstützungselemente (30) vorgesehen sind, die um die Aufnahmekammer (5) für das obere Ende des Rohrs verteilt sind, um unter der Schulter (103) an in Umfangsrichtung beabstandeten Unterstützungsorten in Eingriff zu gelangen.
  3. Vorrichtung nach Anspruch 1 oder 2, wobei jedes Schulterunterstützungselement (30) um eine zugeordnete Schwenkachse (31), vorzugsweise um eine Schwenkachse (31) in einer Ebene senkrecht zu dem zu unterstützenden Rohr, vorzugsweise zwischen einer erhöhten inaktiven Position und einer abgesenkten aktiven Position, schwenkbar ist.
  4. Vorrichtung nach Anspruch 3, wobei das Gehäuse (2) einen Anschlag (32) bereitstellt, an dem das Schulterunterstützungselement (30) in seiner aktiven Position anliegt, so dass die Kraft durch das Rohr auf die Schulterunterstützung direkt an das Gehäuse (2) übertragen wird.
  5. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche,
    wobei mehrere Kupplungsgreifelemente (20) vorgesehen sind, die um die Aufnahmekammer (5) für das obere Ende des Rohrs verteilt sind, um an der Kupplung (102) an in Umfangsrichtung beabstandeten Orten in Eingriff zu gelangen.
  6. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche,
    wobei ein Kupplungsgreifelement eine Klemmbacke (20) ist, die längs einer zugeordneten Führung (21) des Gehäuses (2) gleiten kann, wobei die Führung vorzugsweise eine Führungsoberfläche bildet, die sich in Richtung zur unteren Öffnung zu einem reduzierten Durchmesser verjüngt, so dass sich die Klemmbacke dann, wenn sie sich zu der unteren Öffnung vorwärts bewegt, in ihre aktive Position bewegt und eine Klemmoberfläche der Klemmbacke die Kupplung ergreift.
  7. Vorrichtung nach Anspruch 3 und 6, wobei die Schulterunterstützungselemente (30) beispielsweise über eine zugeordnete Verbindungsstange (35) mit einer Klemmbacke (20) verbunden sind, um eine Betätigung der Schulterunterstützungselemente durch Betätigung der Klemmbacken zu erzielen, vorzugsweise derart, dass Erste der Schulterunterstützungselemente (30) ihre aktive Position erreichen, woraufhin die Schulter (103) dazu veranlasst wird, sich auf diesen Schulterunterstützungselementen (z. B. durch Anheben der Vorrichtung (1)) abzustützen, und woraufhin dann die Klemmbacken (20) in ihre aktive Position gebracht werden.
  8. Vorrichtung nach Anspruch 6 oder 7, wobei jede Klemmbacke (20) durch eine zugeordnete Verbindungsstange (40) mit einem gemeinsamen Ringelement (41) verbunden ist, das in Bezug auf das Gehäuse (2) gleiten kann.
  9. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche wobei für das gemeinsame Ringelement ein Betätigungselement (50, 70) vorgesehen ist, das vorzugsweise eine Feder (50), die das gemeinsame Element (41) in eine der aktiven Position der Klemmbacken (20) entsprechende Position drängt, und beispielsweise ein Kraftbetätigungselement (70), z. B. ein hydraulisches Stellglied, um das gemeinsame Ringelement (41) in eine Position zu bewegen, die der inaktiven Position der Klemmbacken entspricht, enthält.
  10. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Vorrichtung (1) eine mittige Welle (3) umfasst, die am Gehäuse (2) angebracht ist, wobei die mittige Welle mit einem Verbinder versehen ist, um die mittige Welle mit einem Motor eines oberirdischen Bohrantriebsmechanismus zu verbinden.
  11. Vorrichtung nach Anspruch 10, wobei die mittige Welle mit einem mittigen Fluidkanal (80) versehen ist, der sich von einer oberen Mündung zu einer Fluidverbindervorrichtung erstreckt, die sich in der Aufnahmekammer erstreckt, wobei die Fluidverbindervorrichtung (85-87) dazu ausgelegt ist, mit dem Rohr verbunden zu werden, um eine Fluidverbindung zwischen dem Rohr und dem mittigen Fluidkanal herzustellen, um beispielsweise Bohrschlamm während des Bohrbetriebs in das Rohr zu leiten.
  12. Vorrichtung nach Anspruch 10, wobei der Fluidverbinder einen mit dem Gehäuse verbundenen Rohrabschnitt (85) umfasst, der mit dem mittigen Fluidkanal kommuniziert, wobei der Rohrabschnitt in das obere Ende des Rohrs einsetzbar ist, wobei eine Dichtungsanordnung (86, 87) vorgesehen ist, um eine Fluiddichtung zwischen dem Rohrabschnitt und dem oberen Ende des Rohrs herzustellen.
  13. Vorrichtung nach Anspruch 12, wobei die Dichtungsanordnung einen Dichtungsring (86) enthält, der sich um den Rohrabschnitt erstreckt und in Bezug auf den Rohrabschnitt längs eines Gleitabschnitts hiervon gleiten kann, wobei sie eine Fluiddichtung zwischen dem Ring und dem Rohrabschnitt aufrechterhält, wobei der Ring so bemessen ist, dass er mit dem oberen Ende des Rohrs in einem dichten Eingriff ist, wobei vorzugsweise ein Federvorbelastungsmittel (87) vorgesehen ist, um den Dichtungsring in einen Eingriff mit dem Rohr zu drängen.
  14. Oberirdischer Antriebsmechanismus, der einen Körper enthält, der in einem Bohrturm beispielsweise längs einer in dem Bohrturm angebrachten vertikalen Führung für eine vertikale Bewegung aufgehängt werden kann, wobei der oberirdische Antriebsmechanismus ferner einen Motor mit einem drehbaren Abtriebselement und ferner eine Vorrichtung nach einem der Ansprüche 1-13 enthält, um ein Bohrlochrohr, das mit dem Körper verbunden ist, zu greifen und aufzuhängen, um die vertikale Bewegung des Bohrlochrohrs sowie die Drehbewegung des Bohrlochrohrs zu ermöglichen.
  15. Bohrturm für die Verwendung beim Ölbohren und Gasbohren, der eine Vorrichtung zum Greifen und Aufhängen eines Bohrlochrohrs nach einem oder mehreren der vorhergehenden Ansprüche oder einen oberirdischen Antriebsmechanismus nach Anspruch 14 enthält.
  16. Verfahren zum Bohren und/oder Warten eines Bohrlochs für Öl und/oder Gas, wobei eine Vorrichtung zum Greifen und Aufhängen eines Bohrlochrohrs nach einem oder mehreren der vorhergehenden Ansprüche verwendet wird.
EP05775179A 2005-08-22 2005-08-22 Vorrichtung zum greifen eines bohrlochrohrs Not-in-force EP1931851B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL2005/000608 WO2007024128A1 (en) 2005-08-22 2005-08-22 Apparatus for gripping a downhole tubular

Publications (2)

Publication Number Publication Date
EP1931851A1 EP1931851A1 (de) 2008-06-18
EP1931851B1 true EP1931851B1 (de) 2009-10-14

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EP05775179A Not-in-force EP1931851B1 (de) 2005-08-22 2005-08-22 Vorrichtung zum greifen eines bohrlochrohrs

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US (1) US20090095489A1 (de)
EP (1) EP1931851B1 (de)
AT (1) ATE445759T1 (de)
DE (1) DE602005017203D1 (de)
WO (1) WO2007024128A1 (de)

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DE102008021491A1 (de) * 2008-04-29 2009-11-05 Dietmar Scheider Spannkopf für eine Erdbohranlage
US8985225B2 (en) * 2011-12-16 2015-03-24 Tesco Corporation Tubular engaging device and method
RU2659930C2 (ru) * 2012-12-11 2018-07-04 Сандвик Интеллекчуал Проперти Аб Усовершенствования устройства манипулирования бурильными трубами
US9546524B2 (en) * 2013-12-31 2017-01-17 Longyear Tm, Inc. Handling and recovery devices for tubular members and associated methods
US10053973B2 (en) 2015-09-30 2018-08-21 Longyear Tm, Inc. Braking devices for drilling operations, and systems and methods of using same
PE20181223A1 (es) 2015-12-14 2018-07-30 Bly Ip Inc Sistema y metodos para liberar una parte de una sarta de perforacion de un cable de perforacion

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US6536520B1 (en) * 2000-04-17 2003-03-25 Weatherford/Lamb, Inc. Top drive casing system
ATE373160T1 (de) * 1999-03-05 2007-09-15 Varco Int Ein- und ausbauvorrichtung für rohre
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
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CA2390365C (en) * 2002-07-03 2003-11-11 Shawn James Nielsen A top drive well drilling apparatus
GB2414759B (en) * 2003-04-04 2007-11-07 Weatherford Lamb Method and apparatus for handling wellbore tubulars

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Publication number Publication date
DE602005017203D1 (de) 2009-11-26
US20090095489A1 (en) 2009-04-16
EP1931851A1 (de) 2008-06-18
WO2007024128A1 (en) 2007-03-01
ATE445759T1 (de) 2009-10-15

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