EP2268888A2 - Tête de serrage pour un dispositif de forage de terrain - Google Patents

Tête de serrage pour un dispositif de forage de terrain

Info

Publication number
EP2268888A2
EP2268888A2 EP09737875A EP09737875A EP2268888A2 EP 2268888 A2 EP2268888 A2 EP 2268888A2 EP 09737875 A EP09737875 A EP 09737875A EP 09737875 A EP09737875 A EP 09737875A EP 2268888 A2 EP2268888 A2 EP 2268888A2
Authority
EP
European Patent Office
Prior art keywords
casing
clamping
hollow shaft
sleeve
fluid
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Withdrawn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
EP09737875A
Other languages
German (de)
English (en)
Inventor
Dietmar Scheider
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2268888A2 publication Critical patent/EP2268888A2/fr
Withdrawn legal-status Critical Current

Links

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
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • 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
    • E21B19/06—Elevators, i.e. rod- or tube-gripping devices
    • E21B19/07—Slip-type elevators
    • 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
    • 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 OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Definitions

  • the invention relates to a clamping head for a Erdbohrstrom, comprising a hollow shaft, wherein coaxially on the hollow shaft, a sleeve is arranged displaceably to this, which has at least one, in particular downwardly flared, in particular conically widening end portion and wherein in the hollow shaft and / or at the sleeve at least two radially displaceable to the hollow shaft clamping jaws are mounted, which have at their radially outer end with the expanding end portion cooperating contact surfaces, so that by pushing the end portion of the clamping jaws these are radially inwardly pressed and a first clamping mechanism for a form down into the sleeve insertable / imported upper end portion of a casing, in particular so that a torque between the hollow shaft and casing is transferable by an interaction between clamping jaws and casing and wherein in the hollow shaft, a second clamping mechanism is provided, by means of which an imported / insertable casing at its upper end portion in the axial
  • Such a clamping head has been disclosed for use in earth boring by the same applicant in the German patent application DE 10 2008 012 729.9.
  • the clamping head described there the interaction of which has been described with a drill pipe, is basically suitable, instead of a drill pipe to include a casing as described in the introduction. It may be provided in a first possible embodiment that the second clamping mechanism as well as the first clamping mechanism can be actuated by moving the sleeve which is displaceable on the hollow shaft. This has the advantage, for example, that only one drive must be present in order to move the sleeve.
  • both tensioning mechanisms can be operated independently, e.g. in chronological succession or else at the same time, for example by synchronization in a superordinate control unit controlling the drives.
  • the drives can be in both versions, e.g. each comprise at least one, preferably a plurality of evenly distributed in the hollow shaft cylinder-piston units.
  • Casings are used in the prior art in conjunction with ground wells to stabilize the walls of the well after drilling and lifting of the drill string. For this purpose, it is therefore intended to introduce a so-called casing into the bore performed.
  • the casing itself is hollow, so that the inner free diameter of the bore is maintained, but with the casing wall stabilizing the well over its length.
  • the object of the invention is therefore to provide a clamping head of the type mentioned above, which offers the possibility to subsequently introduce a casing in created holes in the ground and this particular not only a plugging, but in particular to allow a screwing of the casing into the well.
  • a fluid purge in particular a water rinse are used, wherein a concentration of the rinsing force of the rinsing fluid is to be achieved in the borehole.
  • An essential core idea in the construction of the clamping head according to the invention is that on the one hand by the above-mentioned two clamping mechanisms and here in particular by the sliding jaws, by the radial displacement of a introduced into the clamping head casing can be firmly clamped to the rotation of the clamping head also to turn the casing in the soil in rotation. It is ensured by the aforementioned second clamping mechanism that a particular upper portion of the casing is held firmly in the chuck, in particular against the action of gravity, so as to prevent slipping out in the axial direction of the casing from the chuck.
  • the clamping jaws of the first clamping mechanism can be made e.g. have a surface design of the cooperating with a casing surface.
  • the surface may have a structuring and / or preferably a coating which acts as a friction lining.
  • a coating may e.g. the activity-enhancing particles, e.g. Sand, diamonds etc.
  • the inflatable balloon which is annularly around the flushing pipe in a region between flushing pipe and inner wall of the casing, a seal between the flushing pipe and casing, so that prevents the pumped with high pressure washing liquid up through escapes the clamping head.
  • an annular region which is formed between the flushing pipe and an inserted, the flushing tube coaxially surrounding casing is sealable against the rinsing liquid.
  • the balloon increases in volume, is always inflated and thus applies to the inner region of the casing wall and to the outer region of the Spülrohrwandung and thus closes this annular area pressure-tight.
  • This can be achieved in particular by the selected pressure when inflating this balloon, the tightness against different levels of copeldschreibe.
  • a fluid which For example, water, but preferably a hydraulic fluid, in particular an oil, is pumped into the balloon.
  • the annular balloon is formed of a flexible, in particular elastic material.
  • the flexibility ensures that the balloon automatically adapts to the contours that are present in the ring area between the flushing pipe and the casing pipe as a result of the inflation.
  • the preferred resilience of the balloon also ensures that fluid pumped into the balloon for pumping up will automatically escape from the balloon by the inflated elastic material tending to contract again and so pumped Fluid pushed back from the balloon.
  • a separate pump can be used or even a pump that is used anyway in a Erdbohrstrom with such a clamping head according to the invention.
  • the balloon is attached to the flushing pipe, whereby the balloon is prevented, in particular in a state when it is not inflated, from shifting in the axial direction relative to the flushing pipe.
  • the attachment thus always achieves an optimum position relative to the flushing pipe and relative to an imported casing.
  • the attachment may be chosen such that the balloon is arranged above the lower end of the flushing pipe and at the same time relative to an inserted into the chuck casing below its upper end.
  • the balloon has a fluid supply which can be fed with fluid from a rotary feedthrough fastened to the flushing pipe.
  • a rotary feedthrough having an inner fluid-carrying ring member which is rotatably connected to the flushing pipe and is connected to the fluid supply and an outer, opposite the inner ring member rotatable fluid-conducting ring member which is non-rotatable relative to a surrounding machine structure and by means of the fluid also at a rotation of the ring parts to each other to the inner ring member can be fed.
  • the supply of fluid to the rotary feedthrough and then to the balloon can be carried out by a surrounding machine structure, which is ensured here by the rotating decoupling between the outer and inner ring member, that the supply to the rotary feedthrough and the outer ring undergoes no twisting during the rotational movement of a clamping head relative to a surrounding machine structure.
  • a preferred embodiment of the rotary feedthrough can provide that this comprises three fluid channels, so in particular so technically three rotary unions are realized in one component.
  • this Rotary feedthrough three different working fluids independently from the outside, ie a surrounding machine structure to supply to a rotating chuck.
  • a fluid channel for the fluid supply and / or fluid discharge to and / or from the balloon care with two further fluid channels for supplying fluid to each at least one cylinder-piston unit for the axial movement of the sleeve the hollow shaft are inserted in opposite directions.
  • an actuation of the clamping mechanisms of the clamping head by a displacement of the movable sleeve relative to the hollow shaft wherein for this actuation of the sleeve for displacement in the axial direction for each of the two possible directions, at least one cylinder-piston unit is provided.
  • at least one cylinder-piston unit can be used to move the sleeve down relative to the hollow shaft and at least one other to move the sleeve relative to the hollow shaft upwards.
  • Each of these cylinder-piston units can receive its working fluid from one of the channels of the rotary union mentioned above. It is thus possible, with only a single rotary feedthrough to supply all the necessary working fluids to the clamping head according to the invention.
  • FIG. 1 shows a clear sectional view of a clamping head according to the invention, comprising a hollow shaft 3, on which a coaxial sleeve 1 is arranged, which is also referred to as a clamping head bell and whose lower portion widens in a funnel shape / truncated cone down.
  • the inner wall region of this lower, funnel-shaped widening region of the displaceable sleeve forms actuating surfaces for radially outer ends or contact surfaces of clamping jaws 2, which are thus automatically displaced radially inwards by an axial downward movement of the sleeve.
  • these clamping jaws 2 can be mounted displaceably on the sleeve 1 and / or on the hollow shaft 3.
  • FIG. 1 Visible here in the illustration of Figure 1 is a introduced into the chuck head casing 9, wherein the clamping jaws 2 are applied by a downward Move the outer sleeve 1 in the radial direction from the outside to the casing of the casing 9 and a frictional engagement and or form a traction.
  • This makes it possible to transmit torque by turning the entire clamping head according to the invention to the casing 9 and to bring this rotating in a borehole.
  • the figure 1 further shows a second clamping mechanism which is formed by a plurality of clamping elements 4 arranged around a casing 9, wherein each clamping element 4 comprises a radially outer guide surface 4a, which cooperates with a guide surface 3a in the interior of the hollow shaft 3, so that Moving a clamping element 4 in the axial direction, in particular down, a radial movement of the clamping element, in particular inwardly, is effected.
  • the individual clamping elements 4 of the second clamping mechanism are moved when, by means of the sleeve 1 arranged outside on the hollow shaft 3, an axial movement is carried out, in particular in the usual working position downwards.
  • a mechanical operative connection between the outer sleeve 1 and inner clamping elements 4 is provided, which may extend, for example, through the wall of the hollow shaft 3.
  • the kinematic implementation of an axial movement of the clamping elements 4 in a radial movement taking place simultaneously can take place, for example, in that the cooperating guide surfaces 3a, 4a on clamping element 4 and Hohlwelle3 relative to the center axis of the hollow shaft 3 have a tendency, especially when viewed in section have an acute angle to this.
  • a form fit between the clamping elements 4 and a casing 9 can be achieved by the clamping elements 4 provided at the radially inner regions lying contact surfaces 4b are adapted in terms of their design to a casing 9 in particular in the upper region, for example, to the diameter of a Casing 9, so that these contact surfaces 4b eg at least have a cylindrical portion-shaped surface area and / or may also be adapted to a shoulder 9a, which is provided on the casing, or a step 9a at which the diameter of the casing changes, especially in the direction from top to bottom tapers.
  • Such a taper can take place at said shoulder or step 9a, for example, by a right-angled step relative to the axis of the casing, or also by a conical step or any other shapes.
  • the contact surfaces 4b of the clamping elements 4 accordingly also have surface areas which are adapted to such a shoulder or step 9a, so that by a positive connection between the clamping elements 4 and a casing 9 due to the investment of the clamping elements 4 at such a shoulder or step 9a an axial lifting force or holding force can be exerted on the casing when the contact surface 4b at the shoulder / step 9a rests without the clamping elements 4 in the axial direction relative to the casing 9 slip.
  • a corresponding guide surface 3a as counter surface for those guide surfaces 4a on the respective clamping element 4, it may be provided in the embodiment shown here that such a guide surface is formed inside the hollow shaft 3 by a radially inwardly projecting annular region 3b, the inner Recess forms a frustoconical lateral surface which is arranged coaxially about the center axis M of the hollow shaft 3, in particular wherein said frustoconical surface is tapered downwards in the usual working position of the clamping head.
  • a frustoconical surface on the inner ring portion inside the hollow shaft has manufacturing advantages, since such a frustoconical surface can be achieved in a simple manner by an inner boring of a shaft.
  • a hollow shaft 3 are made of a solid material.
  • the radially outer guide surfaces 4a of the clamping elements 4 can furthermore be designed as outer conical surface areas corresponding to the frustoconical lateral surface. This results if both the guide surfaces 4a are formed on the clamping elements 4 as well as on the projecting annular region frustoconical, or form a portion of a frusto-conical lateral surface, that there is only one specific position in which the respective guide surfaces 4a of Clamping element 4 and ring portion 3b form-fitting contact, since outside this particular position, the respective diameters of the individual conical surfaces relative to the center axis M of the hollow shaft 3 do not match one another.
  • the respective guide surfaces 3a, 4a of the clamping element 4 and ring portion 3b are adapted to each other so that the positive engagement between these corresponding guide surfaces increases with increasing positive engagement between the clamping elements 4 and a liner 9, ie in particular when the clamping elements 4 are pushed through the sleeve 3 down and thus simultaneously inward.
  • the second clamping mechanism can be designed so that in the moment when optimal positive engagement between the clamping elements 4 and a liner 9 is also an optimal positive engagement between the corresponding guide surfaces 3a, 4a is given. It will be optimally transferred the respective forces between the surfaces in this way while avoiding too high local pressures.
  • Such an embodiment also has the advantage that in a case when there is no positive connection between the clamping element 4 and casing 9 or between the corresponding guide surfaces, these guide surfaces do not rest over their entire surface area but only selectively or linearly to each other, so that the Friction between the guide surfaces is reduced in this position of the clamping elements.
  • a tilting of the clamping elements 4 relative to the casing 9 is avoided.
  • a radial movement in particular inward it is preferably provided that such a bolt 6 rests in a recess of the clamping element 4 and its projection, the extends in the radial direction, that is formed, for example, in the manner of a slot in the radial direction.
  • a movement of a clamping element 4 in the axial direction of this can be performed in the axial direction to the bolt 6 along this, but also simultaneously move perpendicular to the extension of the bolt 6 in the radial direction.
  • the clamping elements 4 are actuated by a movement of the outer sleeve 1.
  • an operative connection from the interior of the hollow shaft 3 to the outer sleeve 1 may be provided.
  • the clamping elements 4 are movable by means of an arranged inside the hollow shaft 3 actuating element 5 in the axial direction, in particular in the direction of increasing positive engagement relative to the casing, wherein the actuating element 5 with the outside arranged on the hollow shaft sleeve 1 by at least one radial web is connected, which extends through a recess 3 c in the hollow shaft 3.
  • such a recess 3c has a longitudinal extent in the axial direction of the hollow shaft 3, so that during a movement of the sleeve 1 in the axial direction, a web extending in the radial direction through such a recess 3c in this axial direction within the recess 3c is also movable.
  • the movement of a sleeve 1 outside on the hollow shaft 3 thereby be transmitted to the interior of the hollow shaft 3, that the actuator connected by the webs 5 moves together with the sleeve 1.
  • the movement of the actuating element 5 can then be transmitted in different ways to the clamping elements 4, for example, by an actuating element 5 acting directly and directly on a clamping element 4 or else by an actuating element 5 acting indirectly via interposed elements on a clamping element 4 ,
  • an actuating element 5 is annular, wherein the inner recess is provided to surround a casing and wherein on the ring of this actuating element 5 all clamping elements 4 are simultaneously movable.
  • the aforementioned bolts 6, on which the clamping elements 4 move along are fastened to the actuating element 5.
  • a fastening can be effected by means of a screw connection, it likewise being possible for the bolts 6 to dip into guide bores which are provided on the annular region 3b which is formed in the hollow shaft for forming the frustoconical guide surface region.
  • the bolts 6 are arranged at a distance from the center axis M around them, in particular in a uniform angular pitch, as well as the clamping elements 4 attached thereto movably.
  • a clamping element 4, in particular each clamping element 4, which is provided in the hollow shaft 3, in the direction of increasing positive engagement and thus in particular in a downward direction with respect to the usual working position against a restoring force be displaced.
  • a restoring force may, for example, be exerted by a compression spring 7, in particular one which is supported on one side, in particular on the underside, on the tensioning element 4 and on its other side, in particular on the top of the annular area mentioned at the outset.
  • a compression spring 7 surround a bolt 6 also mentioned above.
  • the movement of the clamping elements 4 in the direction of increasing positive engagement against a restoring force has the advantage that the clamping element 4 can be pressed by this restoring force in the axial direction to a realized on a casing shoulder or step 9a.
  • this causes that at the moment when the casing a clamping element 4 relieves this clamping element 4 is pushed out by the restoring force from the positive connection between the guide surfaces, that is pressed, for example, based on the usual working position upwards.
  • the casing is released from the clamping elements 4.
  • Such relief between casing 9 and the clamping element 4 can be achieved, for example, when a casing 9 is introduced into the soil and the clamping head moves relative to the casing 9 from the shoulder 9a of the casing 9a down in the axial direction of the casing.
  • such a compression spring 8 is arranged directly between actuating element 5 and clamping element 4 or, in a particularly preferred embodiment shown here, that such a compression spring 8 between an actuating element 5 and an intermediate element 5a, eg an intermediate ring 5a is arranged, which lies between the actuating element 5 and clamping element 4.
  • all clamping elements 4 can be contacted simultaneously via such an intermediate ring 5a.
  • spring elements 8 can be arranged between the mutually facing annular surfaces of intermediate ring 5a and actuating element 5, for example preferably at the positions at which the aforementioned bolts 6 extend from the actuating element 5 through the intermediate ring 5a and the clamping elements 4.
  • each of these springs 8, for example surround a bolt 6.
  • Such an embodiment according to the invention has the particular advantage that a sleeve 1 in the axial direction relative to the hollow shaft 3 is movable, initially by the indirect action of the actuating element 5 via the compression springs 8, the clamping elements 4 are movable into a positive connection with a casing 9, said after reaching this positive connection between the actuating element 5 and clamping elements 4 or actuator 5 and intermediate ring 5a an axial range of motion remains.
  • This axial movement range results in this case essentially in that upon reaching the positive connection, the compression springs 8 are not yet fully compressed. Accordingly, there remains an axial range of motion which is achieved by the compression of the compression springs 8 achieved in the case of positive locking up to the maximum possible compression of the compression springs 8, eg when the latter Windings abut each other or a separate stop is provided.
  • the construction of the clamping head according to the invention is therefore such that due to this remaining range of motion even with existing positive connection between the clamping elements 4 and the casing, the outer sleeve 1 can be moved in this given range of motion in the axial direction until an effective closure between the jaws 2 of first clamping device and the casing 9 is formed. This conclusion can be given for example by a force and / or shape and / or frictional engagement between the clamping jaws 2 of the first clamping device and the casing 9.
  • Such a clamping head according to the invention makes it possible, in addition to the lifting forces exerted thereon, to simultaneously rotate the casing due to the possibility of transmitting torque and thus reduce the adhesion between the casing 9 and the soil, which considerably simplifies the introduction.
  • the second clamping mechanism is preferably provided to arrange the second clamping mechanism relative to a usual working position of the clamping head above said first clamping mechanism. It is also possible to reverse this arrangement.
  • the clamping head according to the invention shown here also shows in FIG. 1 that a flushing pipe 14 is connected to it in a rotationally fixed manner, which is arranged coaxially around the center axis M of the clamping head and in this embodiment by means of a cover plate 15 which covers the upper end of the hollow shaft 3 this is rotatably connected.
  • the lower end of the flushing pipe 14 terminates in the inner region of the clamping head according to the invention or below the lower end of the hollow shaft 3, so that it is ensured in each case that a introduced from below into the clamping head according to the invention casing 9, which surrounds the flushing pipe 14 coaxially , is arranged with its upper end above the lower end of the flushing pipe 14.
  • the upper region of the casing 9 and in particular a step or shoulder 9a arranged at this upper region can be reliably detected by the above-described tensioning elements 4, so that the casing is fixed in the axial direction.
  • annular ausgestalteter balloon 11 is arranged, which has a fluid supply 12, which also extends through the upper cover plate 15 and here at an inner ring portion of a Rotary feedthrough 13 is fixed, said inner ring portion is rotatably formed with the purge pipe 14.
  • inflation of the balloon 11 can be achieved, so that the annular area between flushing pipe 14 and casing 9 can be closed tightly against the flushing liquid, which is pumped through the flushing pipe 14 into the casing 9.
  • the pumped flushing liquid can thus spread only in the interior of the casing 9 down, but not against the balloon 11 upwards, so that the flushing liquid is pumped down in the casing 9 and softens the wellbore and so to facilitate insertion of the casing. 9 into the borehole care.
  • it is ensured here by an inflated balloon that a built-up pressure of the rinsing liquid is completely retained within the rinsing tube 9.
  • the rotary feedthrough 13 may not only have a channel for fluid transfer, but optionally several channels, in particular two more channels, not shown here cylinder-piston units for moving the outer sleeve 1 in axial direction relative to the hollow shaft 3 to effect.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne une tête de serrage pour un dispositif de forage de terrain, comportant un arbre creux (3) sur lequel un manchon (1) est logé coaxialement de façon à coulisser par rapport à l'arbre. Le manchon présente au moins une zone terminale (1b) s'élargissant notamment vers le bas, notamment en forme de cône. Au moins deux mâchoires de serrage (2) coulissant radialement par rapport à l'arbre creux (3), sont logées dans l'arbre creux (3) et/ou sur le manchon (1). Sur leur extrémité radialement extérieure, les mâchoires de serrage comportent des surfaces de contact (2b) interagissant avec la zone terminale (1b) qui s'élargit, de telle manière que le coulissage de la zone terminale (1b) sur les mâchoires de serrage (2) permet de comprimer les mâchoires radialement vers l'intérieur, les mâchoires formant alors un premier mécanisme de serrage pour une zone terminale supérieure d'un tube fourreau (9), insérable/inséré dans le manchon par le bas, et de telle manière que l'interaction entre les mâchoires de serrage (2) et le tube fourreau (9) permet notamment de transmettre un moment de rotation entre l'arbre creux (3) et le tube fourreau (9). L'arbre creux (3) comporte par ailleurs un deuxième mécanisme de serrage permettant de fixer un tube fourreau inséré/insérable (9) dans sa zone terminale supérieure, dans la direction axiale, notamment afin de maintenir un tube fourreau (9) en position par rapport à la tête de serrage, dans la direction axiale, contre la gravité. Un tube de lavage (14) pour l'amenée de liquide de lavage est logé dans l'arbre creux (3) de façon bloquée en rotation avec celui-ci, la partie inférieure de ce tube étant entourée par un ballon annulaire (11) pouvant être gonflé avec un fluide, notamment avec un liquide.
EP09737875A 2008-04-29 2009-04-29 Tête de serrage pour un dispositif de forage de terrain Withdrawn EP2268888A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008021491A DE102008021491A1 (de) 2008-04-29 2008-04-29 Spannkopf für eine Erdbohranlage
PCT/EP2009/003100 WO2009132831A2 (fr) 2008-04-29 2009-04-29 Tête de serrage pour un dispositif de forage de terrain

Publications (1)

Publication Number Publication Date
EP2268888A2 true EP2268888A2 (fr) 2011-01-05

Family

ID=41130870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09737875A Withdrawn EP2268888A2 (fr) 2008-04-29 2009-04-29 Tête de serrage pour un dispositif de forage de terrain

Country Status (5)

Country Link
US (1) US20110114391A1 (fr)
EP (1) EP2268888A2 (fr)
CN (1) CN102037207A (fr)
DE (1) DE102008021491A1 (fr)
WO (1) WO2009132831A2 (fr)

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CN104481392B (zh) * 2014-12-04 2016-06-01 连云港黄海勘探技术有限公司 立轴岩心钻机双卡盘交替倒杆装置
CN107386958A (zh) * 2017-08-14 2017-11-24 朱国新 一种新型桥梁装置
CN108030205B (zh) * 2018-01-11 2024-05-03 李成徯 一种潮湿雨伞的擦干缩紧装置的使用方法
DE102019001201A1 (de) * 2019-02-20 2020-08-20 TRACTO-TECHNlK GmbH & Co. KG Erdbohrvorrichtung, System umfassend die Erdbohrvorrichtung, Verfahren zum Herstellen einer Erdbohrvorrichtung sowie Verwendung einer Erdbohrvorrichtung
CN110821436B (zh) * 2019-11-19 2021-11-02 瑞安市浙工大创新创业研究院 一种石油开采用防喷装置
CN112963102B (zh) * 2021-02-03 2023-02-07 中国石油天然气股份有限公司 光杆卡子
CN115979522B (zh) * 2023-03-20 2023-06-23 山东远大消防科技有限公司 一种消防管件试压机
CN118757677B (zh) * 2024-08-16 2025-06-17 中国矿业大学 一种二氧化碳地下注入装置

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WO2009132831A2 (fr) 2009-11-05
US20110114391A1 (en) 2011-05-19
CN102037207A (zh) 2011-04-27
DE102008021491A1 (de) 2009-11-05
WO2009132831A3 (fr) 2010-12-09

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