EP2878761B1 - 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
EP2878761B1
EP2878761B1 EP13195384.6A EP13195384A EP2878761B1 EP 2878761 B1 EP2878761 B1 EP 2878761B1 EP 13195384 A EP13195384 A EP 13195384A EP 2878761 B1 EP2878761 B1 EP 2878761B1
Authority
EP
European Patent Office
Prior art keywords
drill bit
unlocking
locking
tube
bolt
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.)
Not-in-force
Application number
EP13195384.6A
Other languages
German (de)
English (en)
Other versions
EP2878761A1 (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.
  • Out JP H09250284 A is a device with a crown, with pins for locking and a holding sleeve known.
  • a drill shoe is known as a drilling tool.
  • WO 2010/095998 A1 is a start kit, a housing tube and a starter rod for drills for impact rock drilling known.
  • EP 1 818 499 A1 is a device for the simultaneous drilling and lining of wells known.
  • 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 7.
  • 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 recess is provided in the drill bit, in which an unlocking 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. It is the Unlocking bolt as a head construction attached to the actually built into 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.
  • 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 therefore particularly easy.
  • a secure connection between the pipe and drill bit in the locking position is possible.
  • the number of locking bolts is designed such that they at least partially protrude radially in their locking first position relative to an outer wall of a Bohrkronenhalses 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.
  • 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 axially displaceable in the advancing direction 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 a number of formations are arranged on the drill bit neck, which can be inserted axially into a number of corresponding edge recesses of the tube.
  • 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 release bolt through the tube 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.
  • the inventive method provides that a release of the drill bit triggering release bolt is inserted into a arranged in the drill bit, central, cylindrical recess.
  • 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.
  • the unlocking pin has a collar whose outer diameter is greater than the inner diameter of the retaining sleeve and whose inner diameter is smaller than the inner diameter of the retaining sleeve and that by inserting the unlocking bolt in the recess therein a retaining sleeve for triggering the release is axially displaced from a locking first position in the advancing direction to an unlocking second position.
  • 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 biased locking bolt are unlocked by the axial displacement of the retaining sleeve from the locking first position to the unlocking second position, whereby the locking bolt from a locking first position in a move the 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.
  • FIG. 1 shows a perspective, schematic representation of a drill bit 1 according to the invention, which is to be used for producing a vertical wellbore in a subsoil, not shown.
  • the drill bit 1 has at its lower end a cylindrical outer wall, from the four formations 1.1 protrude upwards, but with respect to the cylindrical outer wall at the lower end of the drill bit 1 does not protrude to the outside.
  • the formations 1.1 are each separate elements, each secured with a screw 1.2 in the main body of the drill bit 1.
  • the drill bit 1 is formed in its upper region by the arrangement of a recess 1.3 a hollow cylinder, which is located within a Bohrkronenhalses 1.4 and at its upper edge has a cone 1.5.
  • the drill bit 1 is the non-rotatable connection to a not shown here and in the Figures 2 . 3 and 7 represented pipe 2.
  • two locking bolts 3 are arranged, which are radially displaceable and each fixed by means of a fixing plate 3.3 in the drill bit neck 1.4.
  • the fixing plates 3.3 are not opposite to the outer wall of the Bohrkronenhalses 1.4 to the outside.
  • the locking bolts 3 are radially displaceable, from a locking first position to an unlocking second position, wherein they protrude in their locking first position not shown here relative to the outer wall of the Bohrkronenhalses 1.4 partially radially and in its here shown unlocking second position relative to the outer wall of the drill bit neck 1.4 do not protrude radially.
  • FIG. 2 shows the pipe to be connected to the drill bit 1 2, which has four edge recesses 2.1 at its lower edge, which correspond in shape and in their arrangement with the formations 1.1, not shown here.
  • the outer diameter of the tube 2 is about as large as the outer diameter of the drill bit 1, not shown here.
  • the inner diameter of the tube 2 is slightly larger than the outer diameter of the Bohrkronenhalses 1.4, so that it can be inserted into the tube 2 with little play or clearance.
  • two recesses 2.2 are arranged opposite each other, whose size and position correspond to the size and position of the locking bolt 3.
  • FIG. 3 shows a longitudinal section of a portion of the tube 2 and the drill bit 1 according to the invention in its locked state, ie in the state in which the drill bit 1 is so firmly connected to the tube 2, that its rotational movement and feed to the drill bit 1 is transferable, so that a borehole can be produced.
  • the moldings 1.1 made of steel are each connected by means of two screws 1.2 with the main body of the drill bit 1, so that formations 1.1 and drill bit 1 are flush with their cylindrical outer surfaces.
  • the centrally arranged cylindrical recess 1.3 has at its end shown on the left the cone 1.5, which serves to facilitate the insertion of a medium.
  • the illustration shows two locking bolts 3, which are radially displaceable and in each case fixed by means of the fixing plate 3.3 in the drill bit neck 1.4.
  • the fixing plates 3.3 are not opposite to the outer wall of the Bohrkronenhalses 1.4 to the outside.
  • the locking pins 3 are here in their locking first position, in which they protrude over the outer wall of the Bohrkronenhalses 1.4 partially radially and engage in the corresponding inside recesses 2.2 of the tube 2, so that this in particular in the axial direction relative to the Bohrkronenhals 1.4 and thus the drill bit 1 is fixed.
  • Each locking bolt 3 is fixedly connected to a base plate 3.1, which is acted upon by means of a prestressed coil spring 3.2 with an inwardly, radially on an outer wall of a retaining sleeve 4, directed pressure force.
  • the holding sleeve 4 has an outer diameter which is slightly smaller than the inner diameter of the recess 1.3.
  • FIG. 4 shows an unlocking pin 5, which has a collar 5.1 in its front area shown on the right, whose outer diameter is greater than that of the cylindrical base body of the unlocking bolt 5.
  • the outer diameter of the collar 5.1 is smaller than the inner diameter of the recess 1.3 and larger than the inner diameter of the retaining sleeve 4.
  • a valve ball 6 At the front region of the unlocking pin 5 is a valve ball 6 by means of a valve spring 7 against a screwed to the unlocking pin 5 Head 8 braced, so that a check valve is formed, through which a fluid under sufficient pressure can be flowed out of the head 8, wherein an influx of a fluid through the head 8 in the unlocking bolt 5 is prevented.
  • the unlocking pin 5 has at its end shown on the left an internal thread, with which it can be connected to an actually be built into the ground component, such as a sleeve pipe or icing, so that the unlocking pin 5 with valve ball 6, valve spring 7 and head 8 a Lance head for the sleeve tube or the icing tube can form. It is also possible that the unlocking pin 5 is provided at its end shown on the left with an external thread for connection to the actually to be built into the ground component.
  • FIG. 5 shows a sectional view through the substantially cylindrical holding sleeve 4.
  • the inner wall of the holding sleeve 4 has a constant over its length inner diameter.
  • the outer wall of the retaining sleeve 4 has a variable over its length outer diameter, wherein the outer diameter of the right and left edges shown holding sleeve 4 is slightly larger than in the central region of the retaining sleeve 4, whose length is slightly larger than the axial extent of not here shown foot plates 3.1, whereby the holding sleeve 4 in the installed state by means of the standing under radial spring force foot plates 3.1 in the in FIG. 3 shown locking position axially self-fixed.
  • the retaining sleeve 4 is displaceable in its installed state under the action of a defined axially directed force from its locking position, wherein in the FIG. 3 explained foot plates 3.1 are moved against the spring force of the coil springs 3.2 radially outward.
  • the outer diameter decreases from the edge of the retaining sleeve 4 shown on the right only gradually, namely at a low inclination of about 10 ° from. This is the holding sleeve 4 mirror-symmetrical, whereby it is equally effective in its installed position in both possible directions in the drill bit installed.
  • FIG. 6 shows a longitudinal section of some parts of the drill bit after FIG. 3 , namely the components that form a check valve, which has a similar operation as in FIG. 4 has described. It is a spacer plate 1.6, which has an external thread for attachment in a corresponding internal thread in the main body of the drill bit 1, a ball 1.7, a valve spring 1.8 and a provided with through holes, round support plate 1.9, the right also shown in their view is.
  • the non-return valve formed with the illustrated elements prevents fluid from entering the tube 2 from outside via the drill bit 1, although it is ensured that a fluid under sufficient pressure can escape from the drill bit 1 to the outside.
  • FIG. 7 shows a longitudinal section of a portion of the tube 2 and the drill bit 1 according to the invention according to FIG. 3 ,
  • the protrusions 1.1 are still in operative connection with the corresponding Randausappel Jardin 2.1, but that on the other hand, the retaining sleeve 4 has been moved so far axially by means of the collar 5.1 that the foot plates 3.1 were pressed under the action of the spring force of the coil springs 3.2 radially inwardly that the locking bolt 3 no longer engage in the recesses 2.2.
  • the drill bit 1 is no longer axially secured against the tube 2, so that the tube 2 can be deducted from the drill bit 1.
  • This makes it possible to pull the tube 2 out of the ground, so that only the drill bit 1 remains as a lost component in the ground.
  • This is particularly effective, since by inserting the unlocking bolt 5, to which the component actually to be installed, which is not shown here, is fastened, the component actually to be installed, For example, a sleeve tube or a freezing tube, already installed.
  • the insertion of the unlocking bolt 5 is particularly simple and self-centering due to an interaction of the cone 1.5 and the conical head 8.
  • the drill bit 1 when, after completion of the drilling after reaching the final hole depth, the actual component to be installed, at the top of the unlocking pin 5 is attached, reaches its predetermined position, the drill bit 1 is automatically released from the tube 2. Subsequently, the tube 2 can be pulled without the drill bit 1 from the ground, while apart from the drill bit 1, the sleeve tube or the icing tube remains in the ground. It is also possible to leave other internals introduced in the manner according to the invention in the ground, for example Gewi steels.

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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)

Claims (9)

  1. Couronne de forage (1) pour le forage d'un sol de construction, la couronne de forage (1) présentant un moyen pour un desserrage interne d'une connexion desserrable entre la couronne de forage (1) et un tube (2), un évidement (1.3) étant prévu, dans lequel peut être introduit un boulon de déverrouillage (5) pour déclencher les moyens de desserrage, le moyen de desserrage de la connexion desserrable entre la couronne de forage (1) et le tube (2) comprenant une pluralité de boulons de verrouillage (3) déplaçables radialement qui peuvent être déplacés d'une première position de verrouillage dans une deuxième position de déverrouillage, la pluralité de boulons de verrouillage (3), dans leur première position de verrouillage, dépassant au moins partiellement radialement par rapport à une paroi extérieure d'un col de couronne de forage (1.4) et, dans leur deuxième position de déverrouillage, ne dépassant pas radialement par rapport à la paroi extérieure du col de couronne de forage (1.4) et le moyen de desserrage de la connexion desserrable entre la couronne de forage (1) et le tube (2) comprenant une douille de retenue (4) provoquant le déclenchement du déverrouillage, laquelle est disposée dans l'évidement (1.3),
    la douille de retenue (4) pouvant être déplacée d'une première position de verrouillage dans la direction d'avance dans une deuxième position de déverrouillage.
  2. Couronne de forage (1) selon la revendication précédente,
    caractérisée en ce que la douille de retenue (4) peut être déplacée axialement pour déclencher le déverrouillage entre la première position de verrouillage et la deuxième position de déverrouillage.
  3. Couronne de forage (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la pluralité de boulons de verrouillage déplaçables radialement (3) sont précontraints par une force de ressort de telle sorte que ceux-ci, lors du déclenchement, puissent être déplacés d'une première position de verrouillage dans une deuxième position de déverrouillage.
  4. Couronne de forage (1) selon la revendication 3, caractérisée en ce que chaque boulon de verrouillage (3) est précontraint par un ressort hélicoïdal.
  5. Couronne de forage (1) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une pluralité de formations (1.1) sont disposées au niveau du col de couronne de forage (1.4), lesquelles peuvent être enfichées axialement dans une pluralité de creux marginaux correspondants (2.1) du tube (2).
  6. Couronne de forage (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'évidement (1.3) est pourvu d'un cône (1.5) pour simplifier l'introduction du boulon de déverrouillage (5).
  7. Procédé pour desserrer une couronne de forage (1) pour le forage d'un sol de construction d'un tube (2) dans l'état enfoncé, en particulier pour le desserrage d'une couronne de forage (1) selon l'une quelconque des revendications précédentes d'un tube (2), une connexion entre la couronne de forage (1) et un tube (2) étant desserrée à l'intérieur, un boulon de déverrouillage (5) déclenchant le desserrage de la couronne de forage (1) étant introduit dans un évidement cylindrique central (1.3) disposé dans la couronne de forage (1), le boulon de déverrouillage (5) présentant un collet (5.1) dont le diamètre extérieur est supérieur au diamètre intérieur de la douille de retenue (4) et dont le diamètre intérieur est inférieur au diamètre intérieur de la douille de retenue (4) et en ce que par l'introduction du boulon de déverrouillage (5) dans l'évidement (1.3), une douille de retenue (4) disposée dans celui-ci pour le déclenchement du déverrouillage étant déplacée axialement d'une première position de verrouillage dans la direction d'avance dans une deuxième position de déverrouillage.
  8. Procédé selon la revendication 7, caractérisé en ce que par déplacement axial de la douille de retenue (4) de la première position de verrouillage dans la deuxième position de déverrouillage, une pluralité de boulons de verrouillage (3) déplaçables radialement et précontraints sont déverrouillés, de sorte que les boulons de verrouillage (3) se déplacent d'une première position de verrouillage dans une deuxième position de déverrouillage.
  9. Procédé selon la revendication 8,
    caractérisé en ce que la pluralité de boulons de verrouillage (3), dans leur première position de verrouillage dépassent au moins en partie radialement par rapport à une paroi extérieure d'un col de couronne de forage (1.4) et, dans leur deuxième position de déverrouillage, ne dépassent pas radialement par rapport à la paroi extérieure du col de couronne de forage (1.4).
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 EP2878761A1 (fr) 2015-06-03
EP2878761B1 true EP2878761B1 (fr) 2016-08-24

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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

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Cited By (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

Family Cites Families (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
JP2759437B2 (ja) * 1996-03-14 1998-05-28 エイチ・ジー・サービス株式会社 穿孔装置
CA2496199C (fr) * 2004-02-17 2013-10-01 Tesco Corporation Foret centre recuperable
PL1818499T3 (pl) * 2006-02-09 2011-11-30 Gonar Sp Z O O Urządzenie do równoczesnego wiercenia i obudowania otworów strzałowych
SE532471C2 (sv) * 2009-02-19 2010-02-02 Sandvik Intellectual Property Startkit, foderrör och startstång till borrutrustningar för slående bergborrning

Cited By (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

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