EP0198896A1 - Dispositif pour relier un train de barres de forage avec un tube ou element semblable. - Google Patents

Dispositif pour relier un train de barres de forage avec un tube ou element semblable.

Info

Publication number
EP0198896A1
EP0198896A1 EP85905395A EP85905395A EP0198896A1 EP 0198896 A1 EP0198896 A1 EP 0198896A1 EP 85905395 A EP85905395 A EP 85905395A EP 85905395 A EP85905395 A EP 85905395A EP 0198896 A1 EP0198896 A1 EP 0198896A1
Authority
EP
European Patent Office
Prior art keywords
drill string
piston
pipe
coupling pieces
pressure medium
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
Application number
EP85905395A
Other languages
German (de)
English (en)
Other versions
EP0198896B1 (fr
Inventor
Fritz Tibussek
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.)
Mhwirth GmbH
Original Assignee
Wirth Maschinen und Bohrgeraete Fabrik 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 Wirth Maschinen und Bohrgeraete Fabrik GmbH filed Critical Wirth Maschinen und Bohrgeraete Fabrik GmbH
Publication of EP0198896A1 publication Critical patent/EP0198896A1/fr
Application granted granted Critical
Publication of EP0198896B1 publication Critical patent/EP0198896B1/fr
Expired 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
    • E21B23/0411—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion specially adapted for anchoring tools or the like to the borehole wall or to well tube
    • E21B23/04115—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion specially adapted for anchoring tools or the like to the borehole wall or to well tube using radial pistons
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
    • E21B23/042—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion using a single piston or multiple mechanically interconnected pistons
    • 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
    • E21B7/12—Underwater drilling
    • E21B7/136—Underwater drilling from non-buoyant support
    • 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 device as a unit which can be installed in a drill string for releasably connecting the drill string to a pipe or similar hollow body, with coupling pieces which can be brought into contact with the pipe and associated piston-cylinder units / their pistons on one side for transferring the Coupling pieces can be acted upon by pressure medium in an external operative position, and on the other side are spring-loaded for returning the coupling pieces.
  • an aggregate can be built in that has radially displaceable bolts as coupling pieces. These engage in holes in the tube and can be held in this position by hydraulic pressure. They then transmit the rotation and the axial movement of the drill string to the pipe during drilling. Has the pipe reached the desired depth in the course of drilling, for example if after
  • the pipe must be separated from the rod. This can be achieved by releasing the bolts from the holding pressure by means of a rope running along the drill string for days, so that the bolts then move radially inwards under spring force and thereby out of the openings of the pipe stepping out.
  • the drill string can then be used to continue drilling while the pipe remains in its place.
  • Such a connection between a drill string and a pipe can only be made for days, because otherwise the bolts cannot enter the openings in the pipe.
  • the object of the invention is to provide a device for coupling a drill string with a pipe or the like. to create, which allows the drill string to be repeated with a pipe, Casing or the like to be able to connect and to be able to effect the connection even without direct access to the connection point, in particular also under water. Furthermore, the invention strives for a particularly favorable design of a device for releasably connecting a drill string to a pipe or the like for practical purposes. on. With all of the further problems connected with this, the invention results from the respective explanation of the indicated solution.
  • the invention is characterized by an actuation system for the piston-cylinder units assigned to the coupling pieces, which is to be supplied over a day from a pressure medium source via a single pressure medium line and which contains a directional control valve which can be switched by means of a pressure medium actuator and has at least three connections, one of which is connected to a pressure medium supply line, a second to at least some of the piston-cylinder units and a third to a line, the pressure medium actuator being connected to the supply line and between the adjustable part of the directional control valve and the actuator a one-way coupling, ratchet or the like. is provided.
  • the actuator is advantageously a piston-cylinder unit with a return spring, the latter being able to be installed in the unit or can be assigned to a part connected to it.
  • a preload valve is expediently provided in the line leading to the first connection of the directional valve. A particularly favorable chronological sequence of the processes in the system can thus be achieved.
  • an unlockable check valve is provided in the line leading from the second connection of the directional control valve to the piston-cylinder units, the control line of which is connected to a fourth connection of the directional control valve.
  • the pressure medium line leading to the actuation system can have any suitable shape, including a line leading along the linkage.
  • This pressure medium line is particularly advantageously formed by a central cavity of the drill string, specifically by the interior of drill pipes.
  • a sealing piston that can be lowered into the drill string by means of a rope. After a coupling or uncoupling process has been carried out with the device, such a sealing piston can be pulled out again, so that a continuously free passage in the drill string is again available for other purposes, in particular for flushing.
  • coupling pieces which are movable against the force of a spring and each have a bevel in the region of the front end.
  • the device installed in a drill string can then be lowered over the end of a pipe, the Coupling pieces are pressed back regardless of the position of the piston in contact with the edge of the tube and then remain in contact with the inner tube wall until they can assume the desired position, be it that they or the like in openings in the tube to be coupled. occur, be it that they under or overlap a surface on the pipe.
  • the coupling pieces as bolts, bolts or the like. be designed or have the shape of angle levers.
  • piston-cylinder units can then be arranged in particular parallel to the longitudinal axis of the device.
  • the arrangement and design of the coupling pieces can be made such that a downward and / or upward force from the drill string can be transmitted to the pipe by the same. Depending on the requirements, only those coupling pieces can be present that are able to transmit a force in one direction. Furthermore, two groups of coupling pieces can be provided, one of which can transmit a downward force and the other can transmit an upward force.
  • coupling pieces designed as support bodies can be provided, one or the like for bearing against a counter surface on the tube. have bringable support surface.
  • Such support bodies can form the sole dome pieces, e.g. when no torque is to be transmitted from the drill string to the pipe, but only an axial force.
  • the design can also be such that several supporting bodies and bolts are provided as coupling pieces with a spacing in the axial direction of the device.
  • the support body can then only serve to ensure that the bolts come to the correct height with openings in the pipe when the drill string is lowered relative to the pipe. They then fulfill a stop function. Furthermore, they are also able to exert pressure downwards on the pipe.
  • the bolts predominantly transmit a torque and the supporting bodies predominantly transmit an axial force from the drill string to the pipe.
  • a further embodiment consists in that the pipe to be coupled has recesses on its upper edge with which coupling pieces can be brought into engagement. This not only results in a favorable connection due to the easily accessible entry of the coupling pieces into the recesses, but also enables a torque transmission if necessary.
  • the embodiment is advantageously made such that a housing to contain the coupling pieces is connected to the parts of the drill string Inner body of the device is rotatably mounted.
  • Fig. 1 shows a part of a platform with a drill
  • Drill string to illustrate a possible application of the device 2 shows another embodiment of a boring bar with a pipe to be coupled,
  • FIG 3 shows an embodiment of the device in detail, partly in section, partly schematically,
  • FIG. 5 shows a modified embodiment of the device in a representation comparable to FIG. 3,
  • Fig. 8 shows a detail of a further embodiment of the
  • Numeral 4 designates a drill string composed of a plurality of tubular rod parts 4a and numeral 5 designates a pipe or casing to be temporarily carried by it.
  • a device 6 is installed in the drill string, by means of which the Drill string 4 can be coupled to the pipe 5.
  • the rod parts 4a are releasably connected to one another and to the device 6 by flanges 3.
  • the part 4 * of the drill string located below the device 6 has a telescopic device 7 known per se, a drill collar 8 and a drilling tool 9 in the form of a drill head with undercuts which can be extended radially over the diameter of the latter , Extension tools 9a or the like. on.
  • FIG. 2 shows another embodiment of a drill string part 4 "which adjoins the device 6 downwards and which has a plurality of stabilizers 10 or the like and a drill head 11 without an extension chisel.
  • a pipe or casing which grows with them is also designated here with the number 5 as in the remaining parts of the description.
  • FIG. 3 The embodiment of a device shown in FIG. 3 has a housing 14 which contains an inner tube 15 with a free inner passage 16. This forms the continuation of the individual tubular rod parts 4a (FIG. 1) of the drill string 4.
  • Piston-cylinder units 17 and 18 are provided in the housing 14 in two different planes E1 and E2. These are arranged at uniform angular intervals distributed over the circumference. Their number can be, for example, four or more.
  • Each unit 17 contains a cylinder 19 and a piston 20.
  • a pressure medium can be supplied to the cylinder chamber 21 via a line 22, which is only indicated schematically.
  • the piston 20 is loaded by a compression spring 23 which tries to move it radially inwards.
  • the number 24 denotes a coupling piece in the form of a bolt, which is connected to a shaft 25 and a thickened end portion 26 extends into a vented cavity 27 of the piston 20.
  • a compression spring 28 is arranged between the piston 20 and a shoulder on the bolt 24 and attempts to push the latter away from the piston 20. Against the force of this spring 28, the bolt 24 can be displaced radially relative to the piston 20, ie into it.
  • the latch 24 is provided with a beveled end face 24a.
  • the unit 18 also has a cylinder 29 with a piston 30 displaceable therein, with which a support body 34 is fixedly connected.
  • Pressure medium can be supplied to the cylinder chamber 31 via a line 32 running parallel to the line 22.
  • the piston 30 is loaded by a compression spring 33 which tries to push it radially inwards.
  • Numbers 35 and 36 each designate, in the grooves of the bolt 24 or the support body 34, engaging guide bolts, which at the same time prevent the parts 24 and 34 from rotating about their longitudinal axes.
  • the support bodies 34 each have a lower support surface 37 at the front end, which can lie against the upper end surface 38 of the tube 5.
  • Radial openings 39 are provided in the tube 5 in such a number and arrangement that the bolts 24 can enter them.
  • Numeral 40 overall designates an actuation system for the piston-cylinder units 17 and 18. At one point on the wall of the tube 15 there is an opening with a check valve 41, via which pressure medium, in particular water, supplied through the interior 16 of the tube 15 into a closed space 42 and from there via a connection 43 into a filter 44 containing lead 45 can reach. This branches and leads, as is only schematically shown, to a branch 45a.
  • nem pressure medium actuator 46 which is designed as a piston-cylinder unit, the piston being loaded on its side facing away from the pressure medium space by a return spring 46a.
  • the adjustable part 48a of a directional valve 48 can be switched by means of the drive 46 via a coupling or indexing device 47 which is only effective in one direction and is designed, for example, according to the principle of a ratchet.
  • This valve which is only shown schematically in FIGS. 3 and 4, is advantageously a 4/2-way valve with four connections 51, 52, 53 and 54, with connection 51 having a branch 45b of supply line 45 and the connection 53 is connected to an outlet line 49, which can open, for example, into the annular space between the device 6 or the drill string 4 and the pipe 5.
  • the second connection 52 is connected to a line 50 in which there is an unlockable check valve 55, the control line 56 of which is connected to the fourth connection 54 of the directional control valve 48.
  • the line 50 branches behind the valve 55 into the two line paths 22 and 32 leading to the units 17 and 18.
  • a sealing seat 57 is provided for a sealing piston 58, which has a sealing surface 59 which fits onto the seat 57 at its lower end.
  • a coupling cone 60 for a safety device of a known type, so that the sealing piston 58 can be lowered through the drill string by means of a cable and can also be pulled out of the drill string again.
  • the number 61 schematically denotes a pressure medium source, in particular a pump, while the number 62 indicates the line path formed by the free interior of the drill pipe parts 4a.
  • the pump 61 located above ground can be switched on, so that pressure medium, in particular water, through the in the rest of the closed drill string is directed downward and reaches the line 45 with continuation 45a from the interior 16 of the device via the check valve 41, the space 42, the connection 43 and the filter 44.
  • the pressure medium supplied can now flow via the directional valve 48, the line 50, the check valve 55 and the branch lines 22 and 32 to the piston-cylinder units 17 and 18.
  • the pump 61 is then switched off. 1
  • the check valve 55 closes due to the pressure drop that occurs, and the piston of the actuator 46 is returned to its starting position under the force of the spring 46a.
  • the safety device already mentioned on the rope can be lowered into the drill string. As soon as it hits the coupling cone 60 of the sealing piston 58, the coupling engages, whereupon the sealing piston 58 can be pulled out of the drill string.
  • the drill string 4 with the device 6 is now lowered.
  • the bars 24 touch with their inclined surfaces 24a the inner edge of the upper end face 38 of the tube 5 and are pressed inward against the force of the spring 28 by the required amount. They then slide along the inner wall of the tube 5 with further lowering.
  • the process is ended when the support bodies 34 rest with their surfaces 37 on the upper end surface 38 of the tube 5. If the openings 39 in the head part of the tube 5 are not already aligned with the bolts 24, the bolts 24 come into engagement with these openings when the drill string is subsequently rotated.
  • the springs 28 then cause the latches 24 to snap into the openings, so that both tensile and torsional forces can then be transmitted from the drill string 4 to the pipe 5.
  • the support body 34 ensure that the bolts 24 come with the openings 39 in the tube when lowering to the correct height. They can also serve to exert a downward pressure on the tube 5.
  • the sealing piston 58 is first lowered into the drill string 4 by means of a rope. As soon as he sits down on the sealing point 57, the safety device opens and can then be pulled up again. Then, in accordance with the method of operation already described above, pressure medium is introduced by means of the pump 61, as a result of which the actuator 46 is actuated and the directional valve 48 is thereby switched on. Thus, the print medium can now over the bias valve 63 to the port 54 of the directional control valve and flow into the control line 56, whereby the check valve 55 is opened. As a result of the drop in pressure after the pump 61 is switched off, the piston of the actuator 46 returns to its starting position under the action of the spring 46a.
  • the pressure medium can flow out of the cylinder spaces 21 and 31 of the units 17 and 18, the springs 23 and 33 moving the pistons 20 and 30 radially inward into the rest position, so that both the bolts 24 and the support bodies 34 are withdrawn from the tube 5.
  • the device 6 is separated from the tube 5.
  • the sealing piston 58 can be pulled out of the drill string 4 by means of a rope and catching device, so that the latter is free and with it a further drilling operation can be carried out independently of the pipe 5.
  • FIG. 3 shows an embodiment of the device 6 which is suitable for installation in a so-called flange linkage, ie a drill string with linkage parts which have external lines 64 (FIG. 3), for example for the passage of air.
  • the device shown in FIG. 5, on the other hand, is designed for installation in a so-called double wall linkage and consequently, similarly to the linkage parts itself, has an inner tube 65 and an outer tube 66 surrounding it, the housing of the device being fastened to the latter. Otherwise, the construction of the device corresponds to the embodiment according to FIG. 3.
  • the same or corresponding parts are shown in FIG. 5 with the same reference Numbers as designated in Fig. 3.
  • the actuation system is shown in simplified form in FIG. 5.
  • Fig. 6 shows another embodiment of a coupling element, which here has the form of an angle lever 71 which is pivotable about an axis 72 fixed in the housing 74 of the device.
  • the piston rod 75 of a piston-cylinder unit 77 is connected via a pivot pin 73, the cylinder of which is articulated by means of a pin 76 on the housing 74 of the device.
  • the piston rod 75 with its continuation is approximately comparable to the bolt 24 with the shaft 25 of the unit 17 according to FIG. 3, so that what has been said about this applies accordingly here.
  • the coupling piece 71 can be both a bolt intended for engagement in an opening in a tube and also a support body. The latter is shown in FIG. 6.
  • the Winkel ⁇ lever 71 has a support surface 67 on which a can come on the tube for abutment against an 'r mating surface 69 on the underside of inwardly projecting Federal 78th
  • this part is of the angle lever 70 provided with a bevel 71, so as to 'slide away when lowering the device on the edge of the collar 78 and can thereby aus ⁇ soft inside.
  • the number 79 denotes a stop for a surface on the other arm of the angle lever 71, which provides support.
  • the device has a counter surface 80 facing the end face 68 at the upper end of the tube 5, with which the housing can rest when the tube 5 is to be loaded in the downward direction.
  • an axially upward force can be exerted on the tube 5 by the support body 71 in the position shown in FIG. 6.
  • 7 shows an embodiment of the device 86 as it comes into consideration when only an axial force is to be exerted on a pipe 5 in one direction or the other by means of the drill string, but no torque is to be transmitted.
  • a housing 84 contains, in an upper part, coupling pieces 81 with a bevel at the front end and an actuation system 40 for this, as was explained further above in connection with FIGS. 3 and 4.
  • the housing has a counter surface 80 facing the end face 68 of the tube 5, as is also shown in FIG. 6 and described in connection therewith.
  • the housing continues downward in a projection 85 screwed to it, on which a ring part 87 is rotatably mounted by means of roller bearings 82 and 83 and is fixedly connected to a tubular inner part 88 of the device.
  • This inner part 88 forms the continuation of the rod parts 4 a * of the drill string and is connected to them via flanges 13.
  • the inner part can rotate together with the entire drill string relative to the housing 84, that is to say also relative to the pipe 5.
  • the pressure medium is supplied to the actuation system 40 via the check valve 41 via a plurality of openings 89 in the inner part 88 and an annular channel in the cylindrical wall 90 of the housing 84 surrounding the inner part.
  • the sealing piston 58 expediently contains an inner passage 94 with one or more upper inlet openings 95 and an outlet opening 96 opening below the sealing surface 59 and with a valve 97.
  • the stem 99 of the valve body 98 is connected to the clutch cone 60 by a certain amount. is axially displaceable by a stop limited path. In the idle state, both parts are pressed down by a spring (not shown), so that valve 97 is closed.
  • the sealing piston 58 If the sealing piston 58 is to be brought up with the pipe 5 after completion of a coupling or uncoupling operation of the drill string and the catch device on the lowered rope has gripped the coupling cone 60, then the tensile force in the rope initially causes a displacement at the beginning of the upward movement of the coupling cone 60 upwards, namely together with the valve body 98, so that the valve 97 is opened. As a result, the amount of liquid, in particular water, standing above the sealing piston 58 in the drill string can flow downward via the passage 94 and the opening 96. Such a passage path with valve can also be present in all other versions of the device.
  • FIGS. 8 and 9 illustrate an embodiment in which the pipe 5 'to be coupled has several recesses 92 in the upper edge region, e.g. four, which are located at regularly distributed locations. Coupling pieces 91 can engage in these recesses 92 so that a downward force and / or a torque can be transmitted from the drill string to the pipe 5 '. Otherwise, the execution can be made as it meets the requirements. It can have further features of the type explained, so that what has been said about this applies here analogously and accordingly.
  • the invention enables different ways of working, so that numerous needs can be taken into account particularly well. It allows a pipe in axial
  • the tube can be taken along axially without rotation. This comes into consideration, for example, when the pipe is to be set down. Then it can be worked as illustrated in FIG. 1.
  • the pipe 5 is guided so that the drill head 9 leads the lower pipe end on the rod.
  • the extension chisel 9a is extended, the diameter of the tube is cleared.
  • the extension chisel 9a is drawn in, the drill head 9 is placed on the bottom of the borehole, which relieves the load.
  • the pipe 5 can then be left in a controlled manner by lowering the upper part of the drill string with the device 6, the telescopic device 7 being inserted.
  • the device 6 for uncoupling the pipe 5 from the drill string 4 can be actuated.

Landscapes

  • 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)
  • Drilling Tools (AREA)

Abstract

Pour pouvoir relier à un train de barres de forage un tubage ou un cuvelage à l'aide d'éléments d'accouplement pressurisés sans nécessiter un accès direct au lieu de connexion, on fait appel à un système d'actionnement (40) muni d'une vanne multivoies (48) commutable par un entraînement de positionnement (46). La vanne est équipée d'au moins trois raccords (51, 52, 53), et un accouplement (47) fonctionnant dans une direction est disposé entre la partie mobile de la vanne multivoies (48) et l'entraînement de positionnement (46). En particulier une pluralité d'éléments de support (34) et de verrouillage (24) peuvent, selon le cas, être fournis en tant qu'éléments d'accouplement, situés à une certaine distance dans la direction axiale du dispositif.
EP85905395A 1984-10-30 1985-10-28 Dispositif pour relier un train de barres de forage avec un tube ou element semblable Expired EP0198896B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3439653 1984-10-30
DE3439653A DE3439653C1 (de) 1984-10-30 1984-10-30 Vorrichtung zum Verbinden eines Bohrstranges mit einem Rohr od.dgl.

Publications (2)

Publication Number Publication Date
EP0198896A1 true EP0198896A1 (fr) 1986-10-29
EP0198896B1 EP0198896B1 (fr) 1988-04-27

Family

ID=6249085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905395A Expired EP0198896B1 (fr) 1984-10-30 1985-10-28 Dispositif pour relier un train de barres de forage avec un tube ou element semblable

Country Status (5)

Country Link
US (1) US4750770A (fr)
EP (1) EP0198896B1 (fr)
DE (2) DE3439653C1 (fr)
NO (1) NO165211C (fr)
WO (1) WO1986002695A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602004023058D1 (de) * 2003-03-13 2009-10-22 Robert Tessari Verfahren und vorrichtung zum bohren eines bohrlochs mit einem bohrloch-liner
CN102305022B (zh) * 2011-08-12 2013-08-21 中国地质大学（武汉） 一种打捞式套管钻进钻具
US10662743B2 (en) * 2018-02-08 2020-05-26 Weatherford Technology Holdings, Llc Wear bushing deployment and retrieval tool for subsea wellhead

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Publication number Priority date Publication date Assignee Title
US2481637A (en) * 1945-02-23 1949-09-13 A 1 Bit & Tool Company Combined milling tool and pipe puller
US2606002A (en) * 1949-02-28 1952-08-05 Larson Emanuel Ledge finder
FR1106987A (fr) * 1953-09-02 1955-12-27 De Long Corp Appareil de levage spécialement utilisable dans la technique de l'enfoncement de pilots dans le sol
US2935615A (en) * 1957-06-24 1960-05-03 Jersey Prod Res Co Well logging tool fluid displacer
US3350130A (en) * 1965-10-23 1967-10-31 Ventura Tool Company Well bore running-in and retrieving tool
US3503445A (en) * 1968-04-16 1970-03-31 Exxon Production Research Co Well control during drilling operations
US3901546A (en) * 1973-05-07 1975-08-26 Rucker Co Casing hanger assembly and operating tools therefor
US3961673A (en) * 1974-04-02 1976-06-08 Maschinen- Und Bohrgerate-Fabrik Alfred Wirth & Co., K.G. Drilling apparatus
US4050731A (en) * 1976-01-26 1977-09-27 Lynes, Inc. Shifting apparatus
US4133386A (en) * 1976-12-17 1979-01-09 Halliburton Company Drill pipe installed large diameter casing cementing apparatus and method therefor

Non-Patent Citations (1)

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Title
See references of WO8602695A1 *

Also Published As

Publication number Publication date
DE3562401D1 (en) 1988-06-01
NO165211B (no) 1990-10-01
NO862513L (no) 1986-06-23
NO165211C (no) 1991-01-09
EP0198896B1 (fr) 1988-04-27
NO862513D0 (no) 1986-06-23
DE3439653C1 (de) 1985-07-18
US4750770A (en) 1988-06-14
WO1986002695A1 (fr) 1986-05-09

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