EP2878761A1 - Couronne de forage destinée au forage d'un sol de construction et procédé de détachement d'une couronne de forage destinée au forage d'un sol de construction d'un tube foré - Google Patents

Couronne de forage destinée au forage d'un sol de construction et procédé de détachement d'une couronne de forage destinée au forage d'un sol de construction d'un tube foré Download PDF

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Publication number
EP2878761A1
EP2878761A1 EP13195384.6A EP13195384A EP2878761A1 EP 2878761 A1 EP2878761 A1 EP 2878761A1 EP 13195384 A EP13195384 A EP 13195384A EP 2878761 A1 EP2878761 A1 EP 2878761A1
Authority
EP
European Patent Office
Prior art keywords
drill bit
unlocking
locking
tube
der
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
EP13195384.6A
Other languages
German (de)
English (en)
Other versions
EP2878761B1 (fr
Inventor
Markus Lintschinger
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.)
Zueblin Spezialtiefbau GmbH
Original Assignee
Zueblin Spezialtiefbau 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 Zueblin Spezialtiefbau GmbH filed Critical Zueblin Spezialtiefbau GmbH
Priority to EP13195384.6A priority Critical patent/EP2878761B1/fr
Publication of EP2878761A1 publication Critical patent/EP2878761A1/fr
Application granted granted Critical
Publication of EP2878761B1 publication Critical patent/EP2878761B1/fr
Not-in-force 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
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • 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
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/20—Roller bits characterised by detachable or adjustable parts, e.g. legs or axles
    • 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
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • E21B10/00—Drill bits
    • E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe

Definitions

  • the invention relates to a drill bit for drilling a subsoil and a method for releasing a drill bit for drilling a subsoil from a pipe in the exhausted condition.
  • drill bits for drilling a subsoil are known. Such drill bits are each attached to a pipe, which remains after completion of the hole as a so-called lost pipe in the ground.
  • Such tubes, with which rotary motion and feed are transmitted to the respective drill bit and therefore must be firmly connected to the drill bit, are also referred to as single rod.
  • the invention is based on the object to provide an improved drill bit for drilling a ground and an improved method for releasing a drill bit for drilling a ground from a pipe.
  • the object is achieved with respect to the drill bit by the combination of features according to claim 1 and with respect to the method by the combination of features according to claim 11.
  • the drill bit for drilling a subsoil has according to the invention a means for internally releasing a detachable connection between the drill bit and the tube.
  • Internal release is to be understood as meaning a release in which it is not necessary to access the drill bit from the outside or the transition region of the tube to the drill bit.
  • a preferred embodiment of the invention provides that a recess is provided in the drill bit, in which a release bolt is inserted, with which the means for releasing is triggered.
  • the recess is arranged cylindrically and centrally in the drill bit. This makes it possible after completion of the hole in a simple manner, the actually built into the ground component, such as a sleeve pipe or icing, in the pipe - and thus in the ground - to insert.
  • the unlocking bolt is attached as a head construction on the actually incorporated in the ground component. When the unlocking bolt reaches the drill bit and is inserted into its recess, the drill bit is automatically disconnected from the pipe, ie the release means is released.
  • the pipe can be pulled out of the ground without the drill bit, while the drill bit remains as a lost component and the component that is actually to be installed in the foundation soil in the ground.
  • the pipe can be reused, resulting in great economic benefits, especially in deep holes.
  • a further preferred embodiment of the invention provides that the means for releasing the releasable connection between the drill bit and the tube comprises a number of radially displaceable locking bolts, which is displaceable from a locking first position to an unlocking second position.
  • the locking bolts can be pulled out of corresponding recesses of the pipe. The release of the drill bit is thereby especially easy.
  • a secure connection between the pipe and drill bit in the locking position is possible.
  • the number of locking bolts is preferably designed such that they at least partially protrude radially in their locking first position relative to an outer wall of a drill bit neck and do not protrude radially in their unlocking second position relative to the outer wall of the drill bit neck.
  • the inner diameter of the tube is slightly larger than the outer diameter of the corresponding Bohrkronenhalses. A positive and very viable connection between the pipe and drill bit in the locking position is therefore particularly easy.
  • a particularly preferred embodiment of the invention provides that the means for releasing the releasable connection between the drill bit and the tube comprises a release sleeve causing the holding sleeve, which is arranged in the recess.
  • the retaining sleeve is preferably axially displaceable for triggering the unlocking between the locking first position and the unlocking second position.
  • Another preferred embodiment of the invention provides that the number of radially displaceable locking bolts is biased by spring force such that it is displaceable upon release from a locking first position to an unlocking second position.
  • the locking bolt is preferably biased by a coil spring, whereby the invention is easy to preload and compact buildable.
  • Another preferred embodiment of the invention provides that the drill bit neck a number of formations is arranged in a Number of corresponding Randausappelenstein the tube is axially inserted.
  • the drill bit with the tube form-fitting torque-connected, whereby the invention is suitable for transmitting a rotary motion with high torque, since the torque transmission in the locking position does not have to be done on the locking bolt, which in turn only for axial fixation - And thus comparatively filigree - must be designed.
  • the invention is particularly safe, since the risk of unwanted jamming is particularly low.
  • the recess is provided with a cone.
  • the introduction of the unlocking bolt is simplified because the unlocking bolt is automatically centered.
  • the head of the unlocking bolt itself also has a conical shape and / or a fillet, whereby not only the introduction of the unlocking bolt into the recess, but also the axial passage of the unlocking bolt through the pipe is particularly simplified.
  • the inventive method for releasing a drill bit for drilling a subsoil from a pipe in a sunk state provides that a connection between the drill bit and a pipe is released internally.
  • the drill bit according to the invention is used.
  • a preferred embodiment of the method according to the invention provides that a release bolt triggering the release of the drill bit is inserted into a centric, cylindrical recess arranged in the drill bit.
  • the unlocking bolt When the unlocking bolt reaches the drill bit and is inserted into its recess, the drill bit is automatically disconnected from the pipe, ie the release means is released. Subsequently, the pipe can be pulled without the drill bit from the ground, while only the drill bit remain as a lost component and actually to be incorporated into the ground component in the ground.
  • the pipe can be reused, resulting in great economic benefits, especially in deep holes.
  • a further preferred embodiment of the method according to the invention provides that the unlocking pin has a collar whose outer diameter is greater than the inner diameter of the holding sleeve and whose inner diameter is smaller than the inner diameter of the holding sleeve and that by inserting the unlocking into the recess a holding sleeve arranged therein is moved axially from a locking first position to an unlocking second position to trigger the release.
  • the unlocking of the drill bit from the pipe can thus be made self-centering, so it does not require a planned centering of the release bolt. The release of the drill bit is so very easy.
  • a particularly preferred embodiment of the method according to the invention provides that a number of radially displaceable and prestressed locking bolts are unlocked by the axial displacement of the retaining sleeve from the locking first position to the unlocking second position, whereby the locking bolt of a locking first Move position to an unlocking second position.
  • the release of the drill bit from the tube is particularly easy.
  • Another preferred embodiment of the method according to the invention provides that the number of locking bolts in its locking first position with respect to an outer wall of a Bohrkronenhalses at least partially survive radially and not protrude radially in their unlocking second position relative to the outer wall of the Bohrkronenhalses.
  • the inner diameter of the tube is slightly larger than the outer diameter of the corresponding Bohrkronenhalses. A positive and very viable connection between the pipe and drill bit in the locking position is therefore particularly easy.

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)
EP13195384.6A 2013-12-02 2013-12-02 Couronne de forage destinée au forage d'un sol de construction et procédé de détachement d'une couronne de forage destinée au forage d'un sol de construction d'un tube foré Not-in-force EP2878761B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13195384.6A EP2878761B1 (fr) 2013-12-02 2013-12-02 Couronne de forage destinée au forage d'un sol de construction et procédé de détachement d'une couronne de forage destinée au forage d'un sol de construction d'un tube foré

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13195384.6A EP2878761B1 (fr) 2013-12-02 2013-12-02 Couronne de forage destinée au forage d'un sol de construction et procédé de détachement d'une couronne de forage destinée au forage d'un sol de construction d'un tube foré

Publications (2)

Publication Number Publication Date
EP2878761A1 true EP2878761A1 (fr) 2015-06-03
EP2878761B1 EP2878761B1 (fr) 2016-08-24

Family

ID=49725000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13195384.6A Not-in-force EP2878761B1 (fr) 2013-12-02 2013-12-02 Couronne de forage destinée au forage d'un sol de construction et procédé de détachement d'une couronne de forage destinée au forage d'un sol de construction d'un tube foré

Country Status (1)

Country Link
EP (1) EP2878761B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017105037U1 (de) 2017-08-22 2017-08-28 SysBohr GmbH Bohrkrone
DE202017106258U1 (de) 2017-10-16 2017-10-25 SysBohr GmbH Neuartige Bohrkrone

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429387A (en) * 1967-03-06 1969-02-25 Cicero C Brown Pump out drill bit
US4083415A (en) * 1975-12-18 1978-04-11 Kennametal Inc. Mining bit with replaceable work engaging member
JPH09250284A (ja) * 1996-03-14 1997-09-22 H G Service Kk 穿孔装置
US20060021801A1 (en) * 2004-02-17 2006-02-02 John Hughes Retrievable center bit
EP1818499A1 (fr) * 2006-02-09 2007-08-15 Gonar Sp. Zo.o. Dispositif permettant le forage et le tubage simultané
WO2010095998A1 (fr) * 2009-02-19 2010-08-26 Sandvik Intellectual Property Ab Ensemble démarreur, tubage et arbre de démarreur pour équipements de forage pour forage de roche à percussion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429387A (en) * 1967-03-06 1969-02-25 Cicero C Brown Pump out drill bit
US4083415A (en) * 1975-12-18 1978-04-11 Kennametal Inc. Mining bit with replaceable work engaging member
JPH09250284A (ja) * 1996-03-14 1997-09-22 H G Service Kk 穿孔装置
US20060021801A1 (en) * 2004-02-17 2006-02-02 John Hughes Retrievable center bit
EP1818499A1 (fr) * 2006-02-09 2007-08-15 Gonar Sp. Zo.o. Dispositif permettant le forage et le tubage simultané
WO2010095998A1 (fr) * 2009-02-19 2010-08-26 Sandvik Intellectual Property Ab Ensemble démarreur, tubage et arbre de démarreur pour équipements de forage pour forage de roche à percussion

Also Published As

Publication number Publication date
EP2878761B1 (fr) 2016-08-24

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