EP1931851A1 - Apparatus for gripping a downhole tubular - Google Patents
Apparatus for gripping a downhole tubularInfo
- Publication number
- EP1931851A1 EP1931851A1 EP05775179A EP05775179A EP1931851A1 EP 1931851 A1 EP1931851 A1 EP 1931851A1 EP 05775179 A EP05775179 A EP 05775179A EP 05775179 A EP05775179 A EP 05775179A EP 1931851 A1 EP1931851 A1 EP 1931851A1
- Authority
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- Apparatus for gripping a downhole tubular Apparatus for gripping a downhole tubular.
- 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.
- 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.
- a coupler the box
- 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.
- 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.
- Fig. 1 shows in longitudinal section a preferred embodiment of an apparatus for gripping and suspending a downhole tubular according to the invention, the left-hand half with the coupler gripping members and shoulder support members in active position and the right-hand half with these members in inactive position,
- Fig. 2 on a larger scale the lower part of the apparatus of fig. 1, Fig. 3 a cross section along the line IH-III in fig. 2 with the shoulder support members in active position, Fig. 4 a cross section along the line IV - IV in fig.2 with the coupler gripping members in active position,
- Figs. 5a-f in different successive stages the gripping of a tubular top end using the apparatus of fig. 1.
- 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 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.
- 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 here 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 here a hydraulic actuator 70 is provided for compressing the spring 50, that is raising the ring member 41 in this embodiment.
- 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) .
- the hydraulic actuator 70 is operated to press the clamping jaws 20 downward, so that the coupler is tightly gripped by the jaws 20 (see figure 5f) . It will be appreciated that as soon as the shoulder support members 30 are in their active position any risk of the tubular 100 falling out of the apparatus 1 is avoided. Also the support members 30 hold the coupler 102 in its place when the jaws 20 are forced with great force downward along the coupler 102 to obtain the tight grip.
- 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: a housing having a reception chamber with a bottom opening for introducing said top end of said tubular and a part of the tubular pipe section into the reception chamber via said bottom opening; - external tubular gripping means including: a plurality of tubular gripping members mounted on said housing and adapted to grip the exterior of the tubular pipe section, actuating means that allow displacement of said tubular gripping members between an inactive position, wherein said top end of said tubular can be introduced into said reception chamber, and an active position, wherein said tubular is gripped by said tubular gripping members; shoulder support means including: one or more shoulder support members mounted on
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
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 true EP1931851A1 (en) | 2008-06-18 |
EP1931851B1 EP1931851B1 (en) | 2009-10-14 |
Family
ID=36121304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05775179A Not-in-force EP1931851B1 (en) | 2005-08-22 | 2005-08-22 | Apparatus for gripping a downhole tubular |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090095489A1 (en) |
EP (1) | EP1931851B1 (en) |
AT (1) | ATE445759T1 (en) |
DE (1) | DE602005017203D1 (en) |
WO (1) | WO2007024128A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008021491A1 (en) * | 2008-04-29 | 2009-11-05 | Dietmar Scheider | Clamping head for an earth boring machine |
US8985225B2 (en) * | 2011-12-16 | 2015-03-24 | Tesco Corporation | Tubular engaging device and method |
RU2659930C2 (en) * | 2012-12-11 | 2018-07-04 | Сандвик Интеллекчуал Проперти Аб | Drill rod handler improvements |
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 (en) | 2015-12-14 | 2018-07-30 | Bly Ip Inc | SYSTEM AND METHODS FOR RELEASING A PORTION OF A DRILLING ROD FROM A DRILLING ROPE |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6536520B1 (en) * | 2000-04-17 | 2003-03-25 | Weatherford/Lamb, Inc. | Top drive casing system |
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 |
DE60028425T2 (en) * | 1999-03-05 | 2006-10-19 | Varco I/P, Inc., Houston | Installation and removal device for pipes |
US6691801B2 (en) * | 1999-03-05 | 2004-02-17 | Varco I/P, Inc. | Load compensator for a pipe running tool |
US6276450B1 (en) * | 1999-05-02 | 2001-08-21 | Varco International, Inc. | Apparatus and method for rapid replacement of upper blowout preventers |
US7325610B2 (en) * | 2000-04-17 | 2008-02-05 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
US6557641B2 (en) * | 2001-05-10 | 2003-05-06 | Frank's Casing Crew & Rental Tools, Inc. | Modular wellbore tubular handling system and method |
CA2390365C (en) * | 2002-07-03 | 2003-11-11 | Shawn James Nielsen | A top drive well drilling apparatus |
US7370707B2 (en) * | 2003-04-04 | 2008-05-13 | Weatherford/Lamb, Inc. | Method and apparatus for handling wellbore tubulars |
-
2005
- 2005-08-22 EP EP05775179A patent/EP1931851B1/en not_active Not-in-force
- 2005-08-22 AT AT05775179T patent/ATE445759T1/en not_active IP Right Cessation
- 2005-08-22 DE DE602005017203T patent/DE602005017203D1/en active Active
- 2005-08-22 US US11/990,744 patent/US20090095489A1/en not_active Abandoned
- 2005-08-22 WO PCT/NL2005/000608 patent/WO2007024128A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007024128A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE445759T1 (en) | 2009-10-15 |
WO2007024128A1 (en) | 2007-03-01 |
DE602005017203D1 (en) | 2009-11-26 |
EP1931851B1 (en) | 2009-10-14 |
US20090095489A1 (en) | 2009-04-16 |
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