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EP3043019A1 - Dispositif de serrage rotatif - Google Patents

Dispositif de serrage rotatif Download PDF

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Publication number
EP3043019A1
EP3043019A1 EP15197669.3A EP15197669A EP3043019A1 EP 3043019 A1 EP3043019 A1 EP 3043019A1 EP 15197669 A EP15197669 A EP 15197669A EP 3043019 A1 EP3043019 A1 EP 3043019A1
Authority
EP
European Patent Office
Prior art keywords
clamping
stroke
chuck
housing
clamping device
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Withdrawn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
EP15197669.3A
Other languages
German (de)
English (en)
Inventor
Martin Zumholz
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.)
Geotec Bohrtechnik GmbH
Original Assignee
Geotec Bohrtechnik GmbH
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 Geotec Bohrtechnik GmbH filed Critical Geotec Bohrtechnik GmbH
Publication of EP3043019A1 publication Critical patent/EP3043019A1/fr
Withdrawn legal-status Critical Current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
    • E21B19/10—Slips; Spiders ; Catching devices
    • 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
    • E21B19/161—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe
    • E21B19/163—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe piston-cylinder actuated

Definitions

  • the invention relates to a rotatable clamping device according to the preamble of claim 1.
  • a generic clamping device is from the DE 89 11 481 U1 known.
  • Such clamping devices are used in casing rotary tables to clamp a typically hollow drill pipe, which is to be rotated in order to transmit the torque from the rotary drive to the drill string.
  • the drilling devices are used, for example, to take analyzes or to carry out exploration drilling or to perform well drilling. In any case, a frequent change of location is typical for such drilling rigs, so that compact dimensions as possible, for example also the clamping device to be used, are advantageous for such applications.
  • the invention has for its object to improve a generic clamping device to the effect that this allows the transmission of high torque to the drill string even with the most compact dimensions of the clamping device.
  • the invention proposes equipping the chuck with a short-stroke cylinder.
  • Such hydraulic short-stroke cylinders have been known from practice for years and have comparatively low strokes of 40 mm or less. Practical tests have shown that short-stroke cylinders with a stroke of 15 mm are sufficient to reliably grip the drill pipe on the one hand in order to transmit all-around torques to the drill pipe and, on the other hand, to be able to reliably detach the drill pipe in order to install or remove the drill pipe to be able to.
  • a particularly simple embodiment of the Kurzhubzylinder which is thus designed to save weight and allows the smallest possible structural dimensions, is proposed in that the Kurzhubzylinder are designed as a disposable, which are thus movable under application of hydraulic pressure only in a single direction, namely in the direction of its clamping position ,
  • the provision of the short-stroke cylinder is not hydraulic as in two-way cylinders, but rather as proposed by means of return springs, which push the Kurzhubzylinder from its clamping position to the release position as soon as there is no corresponding hydraulic back pressure.
  • the hydraulic pump can build up a pressure of at least 320 bar.
  • the maximum pressure stated in the technical data of the pump, which the pump can build up can be advantageous even at 500 bar or more, for example, can be used advantageously a pump that can build up a pressure of 700 bar.
  • the Kurzhubzylinder are also advantageous with correspondingly high pressures loaded, for example, with a pressure of at least 400 bar, which has shown in practice the use of Kurzhubzylindern excellent suited in the first test, in which the compressive strength is 500 bar.
  • the chuck may have a housing in which the clamping jaws are mounted.
  • the return springs can be supported directly or indirectly with their one end on this housing, while they act with their other end on a short-stroke cylinder in order to return it from its clamping position to its release position.
  • the aforementioned housing may advantageously be formed from a monolithic block of material so that it can absorb the high forces that are introduced into the housing during the tensioning of the drill pipe.
  • the mentioned housing which extends over a certain axial length of the drill string, be provided at one or both of its axial ends with a support ring which comprises the outer contour of the housing and thus contributes to the fact that the housing absorb forces and the Kurzhubzylinder can support when the Kurzhubzylinder be extended into its clamping position to tension the drill pipe.
  • the configuration of the support ring can advantageously take the form of a flat, annular disc which is attached to the housing from above or below, the support ring having a shoulder in its surface facing the housing.
  • the support ring has a radially outer portion of the support ring engages over the outer contour of the housing, so that in this way the outer contour of the housing is included and is supported against radially outward forces.
  • a support ring may be provided at both axial ends of the housing.
  • the determination of the two support rings can advantageously be such that clamping screws extend through the housing, which are referred to as clamping screws, because they clamp the two support rings together and press them to the housing, the clamping screws extend freely movable through the housing and are defined only on the two support rings.
  • An advantageously simple handling of the clamping jaws can be effected in that a clamping jaw is mounted by means of a groove and spring contour in the axial direction, ie in the longitudinal direction of the drill string, movable relative to the short-stroke cylinder, which serves for the radial adjustment of the clamping jaw.
  • the chuck surrounds the clamping jaw in the axial direction, thus preventing the axial movement of the clamping jaw.
  • this impairment of the axial mobility takes place only when the clamping jaw is in the radial direction within a range which is referred to as a clamping stroke, ie within the range in which the clamping jaw or the acting thereon Kurzhubzylinder between a radially further outward release position and the radially further provided inside clamping position is movable, in which clamping position, the clamping jaw is applied to the drill pipe.
  • the short-stroke cylinder can be moved radially further inwards and accordingly also move the clamping jaw radially inwards, so that the clamping jaw, beyond its clamping stroke, can continue to move radially inwards into a maintenance position in which it travels beyond the boundary of the clamping jaw Chuck protrudes. Consequently, in this maintenance position, the chuck does not hinder the axial mobility of the clamping jaw, so that in its maintenance position in axial direction is movable and can be pulled along its groove and spring contour of the chuck or pushed out.
  • Fig. 1 there is an exploded view of a rotatable tensioner 1 forming part of a casing turntable.
  • the clamping device 1 can be set in rotation in a conventional manner, wherein the corresponding rotary drive is not shown for reasons of clarity.
  • the tensioning device 1 has a central clearance through which a drill string 2 extends.
  • a hydraulic unit 3 has an electric hydraulic pump, wherein the power supply for the hydraulic unit in a conventional manner by means of slip rings, so that the hydraulic unit 3 can be offset with the entire clamping device 1 and the drill pipe 2 in a common rotation.
  • the hydraulic unit 3 is designed as a compact unit, which has comparatively small structural dimensions, but can build up a maximum hydraulic pressure of about 700 bar.
  • the clamping device 1 has a housing 4, which is monolithically made of a single steel part, namely as a milled part of a steel block.
  • the housing 4 has three outwardly projecting portions, in each of which a short-stroke cylinder 5 is arranged, which is arranged in a so-called receptacle 6 and acts on a clamping jaw 7, so that the Clamping jaw 7 and the hydraulic cylinder of the short-stroke cylinder 5 radially to the drill pipe 2 are movable.
  • short-stroke cylinder 5 which surrounds the actually movable, hydraulically movable cylinder, and in a similar manner in practice, so-called “telescopic cylinders” or “hydraulic cylinders” is mentioned, if not only the actual Cylinder component, but the entire assembly is meant.
  • a support ring 8 and 9 is provided in each case.
  • two holes 10 can be seen, which serve to receive the electric motor and the hydraulic pump of the hydraulic unit 3.
  • a plurality of screws are on the upper support ring 8, which are referred to as clamping screws 11, because they serve to clamp the upper and lower support ring 8 and 9 together and set at the two axial outer ends of the housing 4.
  • some of the clamping screws 11 extend through through holes 12, which extend in the axial direction through the housing 4.
  • the support rings 8 and 9 have edges 14 on their surface facing the housing 4, the area of the support ring 8, 9 extending radially outside the edge 14 being thicker than the areas of the support rings 8 and 9, which lie radially within these edges 14.
  • the edges 14 extend exactly along the outer peripheral contour of the housing 4, so that the support rings 8 and 9 surround the housing 4 radially outward virtually by the radially outer regions, where the support rings 8 and 9 have a greater material thickness, in front of the peripheral surface of the Housing 4 extend.
  • the short-stroke cylinder 5 has a stroke of 15 mm.
  • the case required for clamping or releasing the drill pipe 2 so-called clamping stroke is only about 6 to 8 mm.
  • the clamping jaws 7 are guided in the axial direction between the support rings 8 and 9.
  • the chuck which has, inter alia, the housing 4 and the two support rings 8 and 9, leads the jaws 7 in favor of their safest possible fixation not only within the clamping stroke, but also beyond when the jaws 7 are further pushed radially inward , which is always possible, for example, when there is no drill pipe 2 within the tensioning device 1.
  • This guide through the chuck can be done up to a stroke of, for example, 10 to 12 mm.
  • the Kurzhubzylinder 5 allow - as already mentioned - a stroke of 15 mm. If the short-stroke cylinder 5 is extended to the maximum, the clamping jaws 7 therefore come into a maintenance position, in which they are freely movable in the axial direction, since they are no longer overlapped in the axial direction by the chuck, in particular the support rings 8 and 9.
  • Fig. 2 illustrates the structure of a clamping jaw 7.
  • the radially inner surface of the clamping jaw 7 is profiled and as clamping surface 16 denotes.
  • the clamping jaw 7 rests with the clamping surface 16 on the drill pipe 2 and the profiling is used for optimal transmission of forces, in particular the torque on the drill string 2.
  • the jaw 7 At its radially outer end, the short-stroke cylinder 5 adjacent, the jaw 7 has two grooves 17 which extend axially parallel to the drill pipe 2 and which are associated with two springs 18 in the receptacle 6, which engage in these grooves 17, so that overall a longitudinal guide is provided, along which the clamping jaw 7 in the axial direction, ie axially parallel to the drill pipe 2 can be. If the clamping jaw 7 is in its maintenance position, it can accordingly be pushed out of the receptacle 6 without tools and pulled out and replaced, for example if the profiling of the clamping surface 16 should be worn.
  • the clamping jaws 7 can be pushed radially inwards and against the drill pipe 2.
  • the return of the clamping jaws 7 and the short-stroke cylinder 5 is effected by return springs 19, which are arranged as spring assemblies on each receptacle 6 and are supported against the housing 4.
  • the return springs 19 are configured as compression springs, which are compressed by the short-stroke cylinder 5, when this shifts the respective receptacle 6 and the guided thereon clamping jaw 7 radially inwardly.

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)
EP15197669.3A 2014-12-02 2015-12-02 Dispositif de serrage rotatif Withdrawn EP3043019A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202014105800.1U DE202014105800U1 (de) 2014-12-02 2014-12-02 Drehbare Spannvorrichtung

Publications (1)

Publication Number Publication Date
EP3043019A1 true EP3043019A1 (fr) 2016-07-13

Family

ID=52131789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15197669.3A Withdrawn EP3043019A1 (fr) 2014-12-02 2015-12-02 Dispositif de serrage rotatif

Country Status (2)

Country Link
EP (1) EP3043019A1 (fr)
DE (1) DE202014105800U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106323680A (zh) * 2016-08-19 2017-01-11 张福谦 一种易于取样的地质样品取样机构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114165176B (zh) * 2021-12-17 2024-10-29 刘垒 一种石油钻机的锁定装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8911481U1 (de) 1989-09-27 1991-01-24 Delmag Maschinenfabrik Reinhold Dornfeld GmbH & Co, 7300 Esslingen Betätigungseinrichtung
EP1357253B1 (fr) * 1999-07-29 2006-08-30 Weatherford/Lamb, Inc. Appareil et procédé facilitant la connexion de tiges

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8911481U1 (de) 1989-09-27 1991-01-24 Delmag Maschinenfabrik Reinhold Dornfeld GmbH & Co, 7300 Esslingen Betätigungseinrichtung
EP1357253B1 (fr) * 1999-07-29 2006-08-30 Weatherford/Lamb, Inc. Appareil et procédé facilitant la connexion de tiges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106323680A (zh) * 2016-08-19 2017-01-11 张福谦 一种易于取样的地质样品取样机构

Also Published As

Publication number Publication date
DE202014105800U1 (de) 2014-12-11

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