EP3910160A1 - Accouplement de tige de forage et procédé de fonctionnement de l'accouplement de tige de forage - Google Patents

Accouplement de tige de forage et procédé de fonctionnement de l'accouplement de tige de forage Download PDF

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Publication number
EP3910160A1
EP3910160A1 EP20174084.2A EP20174084A EP3910160A1 EP 3910160 A1 EP3910160 A1 EP 3910160A1 EP 20174084 A EP20174084 A EP 20174084A EP 3910160 A1 EP3910160 A1 EP 3910160A1
Authority
EP
European Patent Office
Prior art keywords
coupling
locking bolt
locking
drill pipe
restoring
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
EP20174084.2A
Other languages
German (de)
English (en)
Other versions
EP3910160C0 (fr
EP3910160B1 (fr
Inventor
Robert Dreier
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.)
Bauer Maschinen GmbH
Original Assignee
Bauer Maschinen 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
Priority to EP20174084.2A priority Critical patent/EP3910160B1/fr
Application filed by Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Priority to AU2021270768A priority patent/AU2021270768B2/en
Priority to PCT/EP2021/061895 priority patent/WO2021228663A1/fr
Priority to CA3178429A priority patent/CA3178429A1/fr
Priority to US17/998,458 priority patent/US11913289B2/en
Priority to CN202180034854.XA priority patent/CN115461524A/zh
Priority to EP21723731.2A priority patent/EP4127382A1/fr
Publication of EP3910160A1 publication Critical patent/EP3910160A1/fr
Application granted granted Critical
Publication of EP3910160C0 publication Critical patent/EP3910160C0/fr
Publication of EP3910160B1 publication Critical patent/EP3910160B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer
    • 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
    • E21B17/0465—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 characterised by radially inserted locking elements

Definitions

  • the invention relates to a drill pipe coupling with a sleeve-shaped receptacle, a pin-shaped coupling member which can be axially inserted into the coupling receptacle to form a non-rotatable connection and at least one locking bolt which is directed transversely to the axial coupling direction and is in a locked coupling position between the coupling receptacle and the coupling member extends into a locking recess, wherein the locking bolt is mounted radially adjustable between an unlocking position and a locking position, according to the preamble of claim 1.
  • the invention further relates to a method for actuating this drill pipe coupling according to claim 15.
  • Such a drill pipe coupling is for example from DE 10 2011 109 001 A1 known.
  • This drill pipe coupling is often referred to as a so-called Kelly box.
  • an axial locking is effected in that a transversely directed locking bolt is inserted into the coupling receptacle and the coupling member, so that a form-fitting connection is achieved.
  • the known drill pipe coupling requires manual activities by operating personnel both when locking and when unlocking. These are generally time-consuming.
  • the coupling arrangements can be located several meters above the ground. For actuation climbing aids or even lifting vehicles are therefore required, which is also expensive.
  • work at greater heights above the ground and also in the immediate area of action of a drill rod is problematic for reasons of occupational safety and should therefore be reduced to a required minimum.
  • the invention is based on the object of specifying a drill pipe coupling and a method therefor, with which a particularly efficient coupling of a drill pipe is made possible.
  • the drill pipe coupling according to the invention is characterized in that a tensioning device is provided with which the locking bolt is pressed into its locking position with a predetermined tensioning force, and that the locking bolt is connected to a restoring member, by means of which the locking bolt can be reset into the unlocking position when a restoring force is applied .
  • a basic idea of the invention can be seen in providing an at least semi-automatic drill rod coupling in which the at least one locking bolt is always reliably in the locking position.
  • a tensioning device preferably a tensioning spring
  • Unlocking can then take place via a resetting element, which is actuated manually or powered by energy in order to move the at least one locking bolt into its retracted unlocking position or release position.
  • the arrangement according to the invention achieves fail-safe operation in which locking is ensured even in the event of a failure of electrical energy or hydraulic energy on a drilling device.
  • To actuate the locking bolt only one direction of force application is required, namely when the coupling is to be unlocked.
  • the clamping device locks directly when the respective restoring force is no longer applicable.
  • connections between individual drill pipe elements and in particular a connection between a drill pipe element and a drilling tool can be established and released in an efficient and safe manner.
  • a preferred embodiment of the invention consists in that the locking bolt is mounted in a housing and that the restoring member protrudes from the housing and can be actuated mechanically.
  • the at least one housing for the at least one locking bolt is preferably attached to an outside of the sleeve-shaped coupling receptacle. As a result, the drill pipe coupling can be actuated from the outside in a simple manner.
  • the locking recess is located on the inner coupling member.
  • the locking bolt is rotatably mounted about its bolt axis in the housing, that the restoring member extends transversely to the bolt axis and is designed as a lever for rotating the locking bolt and that a link mechanism is provided between the locking bolt and the housing, by which a rotary movement of the locking bolt can be converted into a movement radially to the drill pipe axis.
  • the locking bolt is cylindrical and inserted into a tubular housing and rotatably mounted therein.
  • Connected to the locking bolt is a preferably lever-like restoring member which protrudes outwardly with respect to the housing.
  • an axially directed force can be applied to the lever-like restoring member in a simple manner, which force is converted into a rotary movement of the locking bolt by the restoring member.
  • This rotary movement can be converted into a radial adjusting movement for unlocking the locking bolt via a link mechanism.
  • the link mechanism has an at least partially screw-shaped groove as a link, into which a cam engages.
  • the groove-shaped link is formed at least on the inside of the housing, in particular a pin-shaped cam, which is arranged on the locking bolt, into the engages helical backdrop.
  • the helical groove can also be formed on the outside of the locking bolt, while a corresponding pin-shaped cam is attached to an inner wall of the housing.
  • the restoring member is provided with a wedge slide mechanism, by means of which an axial movement can be converted into a radial movement of the locking bolt.
  • the wedge slide mechanism can in principle be designed in any way in order to effect a movement conversion by 90 °.
  • the wedge slide mechanism can in particular be arranged on the outside of the coupling device or within the pin-shaped coupling member. By arranging at least one actuating surface directed obliquely to the drill pipe axis, the desired conversion of the direction of a movement can be brought about.
  • a particularly low-wear embodiment of an embodiment variant of the invention is achieved in that a contact element which is provided with a rounded contact surface is arranged at a free end of the restoring member.
  • a rounded contact surface which preferably comes into contact with a straight counter surface, can reduce friction.
  • the rounded contact surface can preferably also be a rotatable element, for example a rotatable cam.
  • the drill pipe coupling can be operated directly by hand by an operator.
  • an actuator in particular a linear drive
  • the linear drive can in particular be a hydraulic or pneumatic adjusting cylinder or an electrically operated spindle drive.
  • a common actuator or a separate actuator can be arranged for each locking bolt.
  • the actuator is preferably wired or wirelessly controllable, so that it can be operated in a simple manner by a machine operator, in particular from the machine cabin.
  • a particularly compact design is achieved in that the at least one locking bolt with the tensioning device is mounted in the pin-shaped coupling member.
  • the pin-shaped coupling member is hollow or designed with a receiving space for the at least one locking bolt and the clamping device.
  • the locking recess is then arranged in a corresponding manner on the sleeve-shaped coupling receptacle.
  • two locking bolts are mounted opposite one another in the coupling member and that the tensioning device is arranged in the coupling member in an axially directed manner.
  • This arrangement can in particular be combined with a wedge slide mechanism, the tensioning device and possibly a linear actuator being aligned along and preferably coaxially to the drill rod axis.
  • transverse forces can be compensated for by two, preferably radially opposite, locking bolts, so that a particularly stable arrangement is achieved.
  • a further advantageous embodiment variant is that the tensioning device has a spring-loaded pusher with a pressing surface inclined to the drill rod axis and that the locking bolts have inclined actuating surfaces at their inner ends, which rest against the pressing surfaces of the pusher.
  • a wedge slide mechanism is achieved, by means of which two or more radially directed locking bolts can be pressed outwards at the same time and held there.
  • a linear drive can actuate the same or an opposite lever in order to retract the locking bolts into their unlocking position.
  • the restoring member is a displaceable axial piston of the actuator.
  • the restoring element can be part of the actuator directly or can be moved by the actuator.
  • the locking bolt has a bevel on its free front side, so that the locking bolt can be pushed radially into its unlocking position when the coupling receptacle and coupling member are axially coupled.
  • the Locking recesses have reached the height of the locking bolts, these can get back into their locking position and thus into the locking recesses due to their spring preload.
  • a secure coupling is achieved immediately in this way.
  • the bevel on the front of the locking bolt serves to convert the axial relative movement between the coupling member and the coupling receptacle into a radial return movement of the locking bolt.
  • the locking bolt has a base body with a pawl displaceably mounted on it, on the free front side of which the bevel is formed, and that a spring element is arranged between the base body and the pawl so that the pawl of the locking bolt in an axial Coupling of the coupling receptacle and coupling member can be pressed radially into the unlocking position.
  • the spring element can be designed with a lower clamping force than the clamping device, so that easy locking is made possible during an insertion process. To unlock the locking bolt, together with the base body and the pawl, must be withdrawn against the action of the tensioning device.
  • the invention further relates to a drilling device with a drill drive for rotatingly driving a drill rod with a drilling tool and a turntable, a drill rod coupling according to the invention being provided and the restoring member of the drill rod coupling being actuatable by the turntable.
  • the drill rod coupling does not have to be arranged on the drill drive. Rather, the drill pipe coupling is arranged between the individual drill pipe elements or between a drill pipe element and the drilling tool.
  • the invention is characterized in that the locking bolt is pressed into its locking position by the tensioning device with a predetermined tensioning force and that when a restoring force is applied to the restoring member, the locking bolt is returned to the unlocking position in which the pin-shaped coupling member is relative to the sleeve-shaped coupling receptacle can be moved axially.
  • the method is carried out with the previously described drill rod coupling according to the invention. The advantages described above can be achieved in this case.
  • the method can be used to efficiently build a drill pipe from a plurality of drill pipe elements, a drill pipe coupling being arranged between each drill pipe element.
  • a drilling tool can also be efficiently attached and detached from the lower end of a drill string.
  • a sleeve-shaped coupling receptacle 20 of a first drill pipe coupling 10 according to the invention is shown.
  • the sleeve-shaped coupling receptacle 20 is designed, corresponding to a so-called Kelly box, cuboid with an upper insertion opening 22 and side openings 26 for the passage of a locking bolt.
  • an annular connection area 24 is provided, which is firmly connected to a drilling tool (not shown).
  • cylindrical housings 60 are attached, in which, as illustrated in FIG Fig. 2 is shown, locking bolts 70 are mounted so as to be radially displaceable.
  • a lever-like restoring member 80 is attached to each locking bolt 70.
  • a circular disk-shaped contact element 82 with a rounded contact surface 84 is arranged at the outer end of the resetting member 80.
  • the resetting member 80 can be turned from the illustrated vertically directed position through approximately 90 ° into a horizontal position, the locking bolt 70 being correspondingly rotated in the housing 60.
  • a partially screw-shaped groove 66 is made in the housing 60, into which a pin-shaped cam 72 protrudes, which is firmly connected to the bolt 70.
  • a link mechanism 64 is formed overall, which converts a rotary movement of the restoring member 80 into a radial linear movement of the locking bolt 70.
  • the locking bolt 70 can of its in Fig.
  • a tensioning device 40 is arranged within the housing 60, which in the present exemplary embodiment is formed by an arrangement of disc springs 41.
  • the tensioning device 40 is supported on the one hand on a housing cover 62 of the housing 60 and on the other hand on an annular shoulder 76 of the locking bolt 70.
  • a base body 78 of the locking bolt 70 is pressed into a locking position.
  • a pawl 71 is slidably mounted, which is pressed radially inward by a spring element 45 into the locking position, which in Fig. 2 is shown.
  • the pawl 71 On its front side, the pawl 71 has an actuating surface 73 which is beveled towards the insertion opening 22.
  • an angular coupling member 50 which is attached to the lower end of a drill rod element 3, not shown, z. B. a so-called. Kelly bar is attached, can be inserted with a transverse locking recess 74 for closing the drill pipe coupling 10.
  • the pawls 71 can be pressed back into their locking position by the action of the respective spring elements 45, the pawls 71 projecting into the locking recess 74.
  • the pin-shaped coupling member 50 is positively locked in the sleeve-shaped coupling receptacle 20.
  • both a torque and axial forces can thus be transmitted between the pin-shaped coupling member 50 and the sleeve-shaped coupling receptacle 20 via the drill pipe coupling 10.
  • the pin-shaped coupling receptacle 50 is preferably attached to a lower end of a drill rod element.
  • the drilling rod coupling 10 can be unlocked by means of a drilling device 2, which is only partially shown, with a so-called rotary plate 4.
  • the turntable 4 represents a generally known sleeve-shaped drive part which can be provided on the drilling device 2 for the rotating drive of so-called support tubes for cased drilling.
  • one or more actuating plates 6 are axially adjustable within such a turntable 4. Axial adjustment can take place by means of a linear drive, which is not shown here.
  • the actuating plates 6 come into contact with the contact elements 82 at the free end of the lever-like return spring 80, with the return elements 80 being turned from their vertical position into an approximately horizontal position by approx. 90 ° due to the rounded contact surface 84, as illustrated in FIG Fig. 7 can be seen.
  • Due to the previously described link mechanism 64 according to Fig. 1 can be retracted radially from the locking position in the locking recess 74 of the pin-shaped coupling member 50 into an unlocking position by this rotating or flipping movement of the restoring members 80 of the respective locking bolt 70 including its pawl 71.
  • the pawls 71 of the locking bolts 70 leave the transversely directed locking recess 74 so that the pin-shaped coupling member 50 can be pulled axially out of the sleeve-shaped coupling receptacle 20, as can be clearly seen in FIG Fig. 8 is shown.
  • FIGS Figures 9 to 13 An alternative drill pipe coupling 10 is shown in FIGS Figures 9 to 13 shown.
  • the peg-shaped coupling member 50 not shown in detail, corresponds to the coupling member 50 described above.
  • the coupling receptacle 20 is also designed essentially in accordance with the coupling receptacle 20 described above.
  • the housing 60 with the locking bolt 70 and the restoring member 80 are designed in a different configuration.
  • the restoring member 80 is designed as an exclusively axially adjustable lever with a link fork 86.
  • the reset member 80 is between an upper position, which in the Figures 9 and 10 is shown, and a lower position according to Figure 11 is axially displaceable. In the upper position, the restoring member 80 is not in direct operative connection with the locking bolt 70 in the housing 60, so that the locking bolt 70 is actuated by a tensioning device 40 formed by springs is pressed into its inwardly protruding locking position, as clearly shown Fig. 10 emerges.
  • a drilling device 2 is shown, with which the drill pipe coupling 10 according to the Figures 9 to 11 can be operated.
  • a box drill bit which is only partially shown, is detachably attached to a drill pipe element 3 as a drilling tool 8 by means of the drill pipe coupling 10.
  • the drill rod element 3 protrudes through a rotary drive 9, also called a power rotary head.
  • a rotary drive 9 On the rotary drive 9, an opening plate 5 is arranged, which in Figure 12 is axially spaced from the restoring members 80.
  • the locking bolts 70 are accommodated in the pin-shaped coupling member 50.
  • the pin-shaped coupling member 50 has in the illustrated embodiment according to Fig. 14 an adapter sleeve 56 corresponding to a Kelly box, so that the pin-shaped coupling member 50 on a conventional Drill rod element with square connection can be attached.
  • a circular disk-shaped stop plate 58 can be arranged between the adapter sleeve 56 and the actual pin-shaped coupling member 50, by means of which a defined axial position is achieved when it is pushed into a sleeve-shaped coupling receptacle.
  • the sleeve-shaped coupling receptacle can be designed in accordance with a conventional Kelly box.
  • the pin-shaped coupling member 50 can also be attached directly to a drill pipe element 3, e.g. B. a so-called. Kelly bar, be attached.
  • the coupling member 50 has an inner cavity in which a tensioning device 40, which is formed by a spring, is arranged.
  • the tensioning device 40 is supported downwards on a base plate 52 of the coupling member 50 and upwards on a shoulder of a conical pusher 42.
  • the conical pusher 42 is pushed upward into an upper position by the compressive force of the clamping device 40.
  • On the conical surface of the pusher 42 are two opposing locking bolts 70 with obliquely directed pressing surfaces 43 on the conical surface of the pusher 43.
  • the locking bolts 70 can be slidably coupled to the conical pusher 42 via tongue and groove connections (not shown in detail).
  • an overhead linear drive is arranged as an actuator 46 with an extendable axial piston 48.
  • the actuator 46 can in particular be a hydraulic cylinder.
  • the axial piston 48 can be extended downward by the actuator 46, the pusher 42 being pressed downward by the axial piston 48 against the action of the clamping device 40.
  • the locking bolts 70 held on the handle 42 are retracted radially into their unlocking position in which they are located within the pin-shaped coupling member 50, as illustrated in FIG Fig. 16 is shown.
  • the actuator 46 moves back, the axial piston 48 is pushed up again by the pusher 42 and the clamping device 40.
  • the locking bolts 70 are again in their locking position moved radially outward, so that fail-safe operation is ensured even if the linear drive 46 fails in the locking position, that is to say in the operating position.

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  • 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)
EP20174084.2A 2020-05-12 2020-05-12 Accouplement de tige de forage et procédé de fonctionnement de l'accouplement de tige de forage Active EP3910160B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP20174084.2A EP3910160B1 (fr) 2020-05-12 2020-05-12 Accouplement de tige de forage et procédé de fonctionnement de l'accouplement de tige de forage
PCT/EP2021/061895 WO2021228663A1 (fr) 2020-05-12 2021-05-05 Raccord de tige de forage et procédé d'actionnement du raccord de tige de forage
CA3178429A CA3178429A1 (fr) 2020-05-12 2021-05-05 Raccord de tige de forage et procede d'actionnement du raccord de tige de forage
US17/998,458 US11913289B2 (en) 2020-05-12 2021-05-05 Drill rod coupling and method for actuating the drill rod coupling
AU2021270768A AU2021270768B2 (en) 2020-05-12 2021-05-05 Drill rod coupling and method for actuating the drill rod coupling
CN202180034854.XA CN115461524A (zh) 2020-05-12 2021-05-05 钻杆接合器和用于操纵钻杆接合器的方法
EP21723731.2A EP4127382A1 (fr) 2020-05-12 2021-05-05 Raccord de tige de forage et procédé d'actionnement du raccord de tige de forage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20174084.2A EP3910160B1 (fr) 2020-05-12 2020-05-12 Accouplement de tige de forage et procédé de fonctionnement de l'accouplement de tige de forage

Publications (3)

Publication Number Publication Date
EP3910160A1 true EP3910160A1 (fr) 2021-11-17
EP3910160C0 EP3910160C0 (fr) 2023-11-15
EP3910160B1 EP3910160B1 (fr) 2023-11-15

Family

ID=70681755

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20174084.2A Active EP3910160B1 (fr) 2020-05-12 2020-05-12 Accouplement de tige de forage et procédé de fonctionnement de l'accouplement de tige de forage
EP21723731.2A Pending EP4127382A1 (fr) 2020-05-12 2021-05-05 Raccord de tige de forage et procédé d'actionnement du raccord de tige de forage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21723731.2A Pending EP4127382A1 (fr) 2020-05-12 2021-05-05 Raccord de tige de forage et procédé d'actionnement du raccord de tige de forage

Country Status (6)

Country Link
US (1) US11913289B2 (fr)
EP (2) EP3910160B1 (fr)
CN (1) CN115461524A (fr)
AU (1) AU2021270768B2 (fr)
CA (1) CA3178429A1 (fr)
WO (1) WO2021228663A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023467C1 (de) * 2000-05-12 2001-09-27 Bauer Spezialtiefbau Bohrvorrichtung
DE202005020729U1 (de) * 2004-07-17 2006-06-14 Abf-Bohrtechnik Gmbh & Co. Kg Aufnahme für rohrförmiges Bohrwerkzeug
DE102006022613A1 (de) * 2006-05-15 2007-11-22 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Bohrantriebseinheit, Bohrgestängeelement und Bohrverfahren
DE102011109001A1 (de) 2011-07-29 2013-01-31 Abf-Bohrtechnik Gmbh & Co. Kg Bohrgerät mit Kelly-Stange und äußere Werkzeugschnellbefestigung

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US3231032A (en) * 1960-04-05 1966-01-25 Atlas Copco Ab Apparatus for drilling in earth covered rock
DE3010440A1 (de) * 1980-03-19 1981-09-24 Stumpp + Kurz Gmbh + Co, 7000 Stuttgart Bohrwerkzeug zum herstellen einer und duebel zum formschluessigen einsetzen in eine in grosser tiefe mit einer konischen erweiterung versehenen bohrung
GB8828654D0 (en) * 1988-12-08 1989-01-11 British Petroleum Co Plc Removable guide post
US8245796B2 (en) * 2000-12-01 2012-08-21 Wwt International, Inc. Tractor with improved valve system
US6682107B2 (en) * 2001-04-05 2004-01-27 Abb Vetco Gray Inc. Preloaded squnch connector
WO2009094245A2 (fr) * 2008-01-22 2009-07-30 Cameron International Corporation Procédés et systèmes de raccord
US8550167B2 (en) * 2011-03-21 2013-10-08 Vetco Gray Inc. Remote operated vehicle interface with overtorque protection
ITMI20122264A1 (it) * 2012-12-28 2014-06-29 Soilmec Spa Dispositivo pulitore elica per rimuovere detriti da un utensile di scavo a vite, macchina di scavo provvista di tale dispositivo pulitore e uso di tale macchina di scavo
US11162339B2 (en) * 2020-03-03 2021-11-02 Saudi Arabian Oil Company Quick connect system for downhole ESP components

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023467C1 (de) * 2000-05-12 2001-09-27 Bauer Spezialtiefbau Bohrvorrichtung
DE202005020729U1 (de) * 2004-07-17 2006-06-14 Abf-Bohrtechnik Gmbh & Co. Kg Aufnahme für rohrförmiges Bohrwerkzeug
DE102006022613A1 (de) * 2006-05-15 2007-11-22 Klemm Bohrtechnik Zweigniederlassung Der Bauer Maschinen Gmbh Bohrantriebseinheit, Bohrgestängeelement und Bohrverfahren
DE102011109001A1 (de) 2011-07-29 2013-01-31 Abf-Bohrtechnik Gmbh & Co. Kg Bohrgerät mit Kelly-Stange und äußere Werkzeugschnellbefestigung

Also Published As

Publication number Publication date
US20230193698A1 (en) 2023-06-22
EP3910160C0 (fr) 2023-11-15
EP3910160B1 (fr) 2023-11-15
AU2021270768B2 (en) 2024-02-15
EP4127382A1 (fr) 2023-02-08
WO2021228663A1 (fr) 2021-11-18
CN115461524A (zh) 2022-12-09
AU2021270768A1 (en) 2023-01-05
US11913289B2 (en) 2024-02-27
CA3178429A1 (fr) 2021-11-18

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