EP2029851A1 - Arbre de rinçage pour la tige de forage d'une installation de forage par roto-percussion, paquet d'impact pour un arbre de rinçage et installation de forage par roto-percussion - Google Patents

Arbre de rinçage pour la tige de forage d'une installation de forage par roto-percussion, paquet d'impact pour un arbre de rinçage et installation de forage par roto-percussion

Info

Publication number
EP2029851A1
EP2029851A1 EP07720159A EP07720159A EP2029851A1 EP 2029851 A1 EP2029851 A1 EP 2029851A1 EP 07720159 A EP07720159 A EP 07720159A EP 07720159 A EP07720159 A EP 07720159A EP 2029851 A1 EP2029851 A1 EP 2029851A1
Authority
EP
European Patent Office
Prior art keywords
hammer
discs
drill
axial
impact
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
EP07720159A
Other languages
German (de)
English (en)
Other versions
EP2029851B1 (fr
Inventor
Marcel Dell'anna
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.)
BTD BOHRTECHNIK AG
Original Assignee
BTD Bohrtechnik AG
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 BTD Bohrtechnik AG filed Critical BTD Bohrtechnik AG
Publication of EP2029851A1 publication Critical patent/EP2029851A1/fr
Application granted granted Critical
Publication of EP2029851B1 publication Critical patent/EP2029851B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/20—Drives for drilling, used in the borehole combined with surface drive

Definitions

  • the invention relates to a flushing shaft for the drill string of a rotary impact drilling according to the preamble of claim 1.
  • the invention also relates to a baffle package for a flushing shaft and equipped with a flushing shaft rotary impact drilling.
  • rotary drilling rigs with augers, or rotary impact drills with external hammers or with internal hammers or double-head drilling rigs are used.
  • Most of these deep drilling rigs have a central drill bit that precedes a cylindrical drill bit surrounding the drill bit.
  • the central drill bit and the drill bit are rotationally driven.
  • the direction of rotation can be the same or opposite (double-head drilling machines).
  • the cuttings shredded by the two drill heads are picked up and brought to the surface by a flushing medium, for example air, water, suspensions, etc., pumped into the drill string in the depth.
  • a variant of the known from the prior art drilling systems provides that the two drilling heads are acted upon by a hammer outside the borehole arranged Hydaulik- to improve the degradation efficiency '.
  • the axial strokes of the hydraulic external hammer are transmitted via a coaxial drill string arrangement on the two rotary driven drill heads.
  • the drilling capacity of such rotary impact drills is limited. In particular, with deep holes of 200 m and more, the drilling capacity of these rigs is not particularly high because of the outside of the borehole hydraulically applied impact energy only a part arrives at the two drill heads and is also divided into the central drill bit and the surrounding drill bit.
  • rotary impact drills provides that the central chisel in addition to rotary drive of a pneumatically operated down-the-hole hammer while the outer cylindrical drill bit is rotated.
  • the advantage of the Imlochhammers is that the impact introduction is always carried out at the same axial distance from the central drill bit and dependent on the hole depth transmission paths omitted.
  • Rotary impact drills with downhole hammer are used primarily in medium-hard to very hard rock and already show acceptable drilling speeds.
  • an overburden drilling apparatus which has a downhole hammer and an outer hammer, which acts on the outer rod with shocks.
  • the internal linkage with the in-hole hammer is decoupled from the blows of the external hammer by a damping element, in order to avoid damaging the through-hole hammer by these blows.
  • a damping element is an elastic disc or a pneumatic damping member, which may be designed as a shock absorber, he proposed.
  • the pneumatic damping element is relatively complex, requires a complicated construction and is therefore not suitable for practical use.
  • An elastic disk as a damping member also proves to be impractical, since it can heat up by the impact effect that it liquefies. As a result, the damping effect is lost in a relatively short time. Without damping, however, damage to the implant hammer or the drill rod can occur relatively soon.
  • Object of the present invention is therefore to improve rotary impact drills with overlay drilling to the effect that they have a longer service life and the drilling performance are improved.
  • fractures of the drill pipe arranged inside the borehole or damage to the downhole hammer should be avoided.
  • a flushing shaft for the drill string of a rotary drilling rig which has the features cited in the characterizing clause of patent claim 1.
  • the tasks are further solved by a baffle package for a flushing shaft for the drill pipe of a rotary hammer drill with the cited in the characterizing part of the corresponding claim Features.
  • the flushing shaft according to the invention is designed for installation in an external drill rod of a rotary impact drilling machine with a superimposed impact mechanism.
  • the rotary impact drilling on a central drill string arranged on a central drill bit which is rotationally driven and is acted upon by a Imlochhamrner with axial blows, as well as a rotationally driven and acted upon by an outer hammer with axial impacts Bohrkrone, which at which the inner Drill rod receiving outer drill string is arranged that it lags against the central drill bit.
  • the flushing shaft has a cylindrical body, at the axial end portions standardized connection threads for connection to the outer drill string or with the outer hammer are provided, and at its in the assembled state the Imlochhamrner facing end portion has a blind hole-like receptacle, which with a supply hole for the Imlochhamrner communicates.
  • a baffle package is arranged, which comprises a number of annular steel discs and, preferably vulcanized, elastomer discs. In this case, an elastomeric disc is always arranged between two steel discs.
  • the flushing shaft according to the invention serves to decouple the blows generated by the impact systems (in-hole hammer or external hammer).
  • the flushing shaft with the baffle package is arranged behind the perforated hammer with respect to a drilling direction and is connected to the outer drill string.
  • the flushing shaft according to the invention is a modular component which can be installed in the rotary impact drilling rig if required and desired. This preserves flexibility for the user.
  • a conventional flushing shaft can be installed in the drill pipe. If the rotary impact drill is to be equipped with two independently acting Working systems, is simply the inventive Spülwelle with baffle packet based on the drilling direction behind the Irnlochharr ⁇ ner inserted into the outer drill pipe.
  • the baffle package is a composite of steel discs and elastomer discs clamped in the receptacle of the flushing shaft.
  • the elastomer discs are always arranged between two steel discs.
  • the steel discs serve on the one hand to mechanically stiffen the impact package and ensure a good distribution of the impact energy over the entire surface of an elastomer disc.
  • they serve to dissipate the heat occurring in the damping of shocks.
  • excessive heating of the elastomeric disks which could even lead to a flow of the material and to the destruction of the impact package, is reliably prevented. Due to the clamped arrangement of the baffle package in the recording of the flushing wave a controlled deformation is ensured in the impact damping.
  • the flushing shaft is cylindrical and has at its two end portions
  • connection threads for coupling to the outer drill pipe can be standardized internal and / or external threads, so that the intermediate piece can be built into the drill string in a modular manner.
  • the axially elastically deformable baffle package is housed in a receptacle.
  • the elastically deformable impact package is used to decouple introduced by the two impact systems in the inner and the outer drill pipe axial shocks.
  • the receptacle for the baffle package is arranged on the end region of the flushing shaft facing the downhole hammer and is in communication with a supply bore for the lancing hammer.
  • a flushing ring arranged in the region of the supply bore serves to introduce the flushing medium, for example a mixture of compressed air and water, and to supply the in-hole hammer with compressed air.
  • the supply bore discharges into the receptacle for the baffle package in such a way that, during operation, an air cushion can form on the side remote from the downhole hammer, which provides for an additional decoupling of the axial beats of the two beater systems.
  • the elastomeric disks of the impact package arranged in the receptacle of the flushing shaft have a slightly smaller outside diameter than the steel disks. This ensures that the elastomer discs can expand elastically radially unimpeded in an axial compression.
  • the baffle package advantageously has a central passage opening for the unhindered passage of the flushing medium.
  • the steel discs are used for mechanical stiffening of the baffle package.
  • the actual damping and decoupling function is perceived by the elastomeric discs.
  • the axial height of the elastomer discs is about the simple to about two and a half times the axial height of the steel discs.
  • the baffle package advantageously has an overall axial height of about 35 mm to about 105 mm. This dimensioning of the baffle in conjunction with a trained in operation in the recording air cushion ensures during operation that a reliable decoupling of the axial shocks is ensured in the usual single beat energies of the two impact systems.
  • the baffle has advantageously the central passage of the annular steel and elastomer discs passing through, provided with a central bore sleeve whose foot is supported at the bottom of the receptacle in the flushing.
  • the bushing closes off the baffle package radially inwards and ensures a further improved removal of the heat which occurs during the compression of the elastomeric disks. In addition, the bush limits the expansion of the elastomeric disks under load.
  • the sleeve of the baffle preferably also made of steel.
  • a rotary impact drilling system with a central drill bit arranged on an inner drill string, which is rotationally driven and acted upon by an impact hammer, and a drill bit which is rotationally driven and subjected to axial impacts by its own outer hammer and thus arranged on an outer drill string receiving the inner drill string is that It lags behind the central drill bit and is designed to decouple the axial impacts generated by the hammer and the external hammer with a clamped impact package consisting of a composite of steel discs and elastomer discs.
  • the baffle package is arranged in an inventive trained Spülwelle.
  • the rotary impact drilling rig is equipped with two impact systems.
  • a down hole hammer acts on the central drill bit.
  • the leading central drill bit has to do most of the mining work.
  • the Imlochhammer offers optimum support for the removal work.
  • the impact energy transmitted to the central drill bit by the in-hole harneeper is not dependent on the drill hole depth or the length of the inner drill string. Rather, the axial blows of the Irrdochhammers are always introduced at the same distance from the drilling sole via the inner drill string in the central Bohrmeissel.
  • the drill bit following the central drill bit is subjected to axial impacts by the outer hammer via the outer drill string.
  • the axial impacts of the additional impact system are solely to aid in the mining work of the drill bit connected to the outer drill string.
  • the impact energy of the additional impact system does not have to be distributed to the drill bit and the central drill bit, as in the case of the rotary impact drills known from the prior art. Rather, the baffle serves to decouple the axial shocks generated by the outer hammer of the forces acting on the central Bohrmeissel axial blows of the Imlochhammers.
  • the impact energies of the two impact systems are independent of each other and can be matched to the respective application and substrate. As a result, a very high drilling performance can be achieved.
  • the decoupling of the impact systems according to the invention significantly improves the service life of the rotary impact drilling rig.
  • the outside hammer is preferably operated hydraulically.
  • the hydraulic drive has been tested and can be derived, for example, from the hydraulic rotary drive of the drill string.
  • the downhole hammer is pneumatically operated with advantage.
  • the supply of the pneumatic Imlochhammers with compressed air is generally easier to accomplish even with large drilling depths or drill lengths as a hydraulic supply. Leaks in the pneumatic supply lines are far less problematic than those in hydraulic systems.
  • the chisel lags whereby the axial impacts of the idler hammer (4) and the outer hammers (7) are largely decoupled from each other, characterized in that for the decoupling of the axial blows of the idler hammer (4) and the outer hammers (7) a clamped Impact packet (9) is used, which is composed of a composite of annular steel discs (91) and elastomeric discs (92), wherein in each case an elastomeric disc (92) between two steel discs (91) is arranged.
  • a clamped Impact packet (9) is used, which is composed of a composite of annular steel discs (91) and elastomeric discs (92), wherein in each case an elastomeric disc (92) between two steel discs (91) is arranged.
  • a method according to the invention for operating a rotary impact drill with a central drill bit arranged on an inner drill string which is rotated and subjected to an axial hammer by a downhole hammer, and a drill bit which is driven in rotation and hammered by an external hammer and which thus engages the inner drill string receiving external drill pipe is arranged so that it lags the central drill bit, the axial blows of the Irrdochharnmers and the Aussenshammers are largely decoupled from each other.
  • a clamped impact package which is composed of a clamped composite of annular steel discs and elastomer discs, wherein in each case an elastomer disc between two steel discs is arranged.
  • the blows generated by the downhole hammer and delivered to the central drill bit and the hammer generated by the external hammer and transferred to the drill bit are decoupled from each other by the baffle package.
  • the baffle serves on the one hand for damping the Axialdite and on the other hand to dissipate the heat occurring in the damping.
  • the axial blows transmitted to the drill bit are preferably generated by a hydraulically operated external hammer and introduced into the outer drill pipe. This allows a simple adjustment of the single impact energy.
  • the axial impacts transmitted to the central drill bit are advantageously generated by a pneumatically driven downhole hammer.
  • the pneumatic loading Operation of the Imlochhammers is easier to accomplish than, for example, a hydraulic operation. Leakage of the pneumatic within the wellbore is less critical than in hydraulic operation.
  • Fig. 1 is an illustration of a rotary hammer drill according to the invention
  • Figure 2 is an exploded view of an inventive flushing with baffle, which is connected to a bell provided with a balance rod ejection.
  • FIG. 1 shows an exemplary embodiment of the rotary percussion drilling machine according to the invention, which is provided overall with the reference numeral 1.
  • the rotary impact drilling rig 1 has an inner drill pipe 2 and an outer drill pipe 5 receiving the inner drill pipe 2.
  • the front end of the inner drill pipe 2 bears with respect to a drilling direction D a central drill bit 3, for example a pin drill bit with diamond and / or hard metal pins.
  • a central drill bit 3 for example a pin drill bit with diamond and / or hard metal pins.
  • an annular drill bit 6 is mounted with hard metal bodies or the like.
  • the inner and the outer drill pipe 2, 5 are rotationally driven via a preferably hydraulic drive 15.
  • the central drill bit 3 connected to the inner drill string 2 precedes the drill bit 6 mounted on the outer drill rod 5 and, during operation, performs the greatest work of dismantling.
  • the inner drill pipe 2 has immediately behind the central drill bit 3 a so-called downhole hammer 4, the pneumatic is drivable.
  • the Imlochhainmer 4 is supplied via a central bore 10 with the required compressed air and applied during operation the central drill bit 3 with axial blows.
  • the compressed air also forms the flushing medium, which is required for the removal of the drill bit comminuted by the drill heads at the drill hole.
  • the flushing medium is a mixture of compressed air and water.
  • the flushing medium is a mixture of compressed air and water.
  • the flushing medium is a mixture of compressed air and water.
  • At the rear end of the drill pipe 2, 5 is connected via an ejection bell 13 and a flushing shaft 8 with the hydraulic rotary drive 15.
  • the shredded cuttings transported by the flushing medium from the wellbore depth is ejected.
  • the flushing shaft 8 is supplied via a flushing ring 11 mounted around it with a connection 12 with the flushing medium.
  • the ejection bell 13 and all subsequent components are outside the borehole.
  • the adjoining the ejection bell 13 in the direction of drilling D sections of the drill string 2, 5 are located within the borehole.
  • the drill pipe 2, 5 has a modular design and can be extended as desired, which is indicated in FIG. 1 by interruption lines.
  • the rotary impact drilling system according to the invention is equipped with an additional impact system 7, which exerts axial impacts on the drill pipe during operation.
  • Decoupling means ensure that the axial impacts of the additional impact system 7 are transmitted only to the outer drill pipe 5.
  • the decoupling means consist of a specially designed flushing shaft 8 with an axially elastically deformable impact package 9.
  • the axial impacts of the additional impact system 7 are preferably generated hydraulically. For example, it is a well-known from the prior art external hammer whose hydraulic operation is derived from the hydraulic drive 15 for the rotational movement of the drill string 2, 5.
  • the axial impacts of the additional impact system 7 serve exclusively to support the dismantling work of the drill bit 6 mounted on the outer drill pipe 5.
  • the impact energy of the additional impact system 7, which is preferably hydraulically operated, does not have to be on the drill bit 6, as is the case with the rotary impact drilling systems known from the prior art and the central drill bit 3 are distributed. Rather, the provided decoupling means 8, 9 ensure that the force exerted by the additional impact system 7 Axial impacts are decoupled from acting on the central drill bit 3 axial blows of the Imlochhammers 4.
  • the impact energy transferred from the downhole hammer 4 to the central drill bit 3 is not dependent on the drill hole depth or the length of the inner drill pipe 2. Rather, the axial impacts of the in-hole hammer 4 are always introduced at the same distance from the drill hole into the central drill bit 3.
  • the impact energies of the two impact systems 4, 7 are independent of each other tuned to the particular application and ground. As a result, a very high drilling performance can be achieved. Due to the decoupling of the impact systems 4, 7, the service life of the rotary impact drilling rig is significantly improved. Fractures of the drill pipe 2, 5 within the borehole, for example in threaded areas of the modular drill pipe 2, 7, can be largely prevented.
  • FIGS. 2-4 Details of a rotary hammer drilling rig according to the invention are shown in FIGS. 2-4.
  • the illustrated components bear for better understanding the same reference numerals as the corresponding components in the overview representation in Fig. 1, even if they may be formed differently in individual, not essential to the invention features, such as outer diameter.
  • FIG. 2 and 3 an inventive Spülwelle 8 with a baffle package 9 and a discharge bell 13 with a balance bar 14 in the exploded state ( Figure 2) and in the assembled state (Fig. 3) are shown.
  • the flushing shaft 8 has an overall cylindrical body, at the two axial end portions standardized connection threads 81, 82 are provided for connection to the outer drill pipe 5 and with the additional impact system 7.
  • the additional impact system facing the end portion has to a blind hole with an internal thread.
  • the end section pointing in the direction of drilling is provided with an external thread 82.
  • End region of the flushing shaft 8 has a blind hole-like receptacle 83.
  • the receptacle 83 is in communication with a supply bore 84 extending from the bottom 85 of the Recording to the periphery of the flushing shaft 8 extends.
  • the flushing ring shown in Fig. 1 surrounds the flushing shaft in the region of the mouth and provides for the supply of the flushing medium, for example a mixture of compressed air and water, through the supply bore 84 in the central channel of the inner drill string.
  • the aggregate provided with the reference numeral 9 baffle package is inserted into the receptacle 83. It consists of a sequence of annular steel and preferably vulcanized elastomeric disks 91 and 92, respectively. Each elastomeric disk 92 is disposed between two steel disks 91. The two outermost discs of the baffle 9 are steel discs 91.
  • the baffle has a central passage 93 which receives a sleeve 94.
  • the sleeve 94 protrudes from a foot part 95, which is supported in the assembled state at the bottom 85 of the receptacle 83.
  • the sleeve 94 is provided with a central bore 96.
  • the flushing shaft 8 can be screwed with its end region provided with the external thread 82 with an end region of the ejection bell 13 that is correspondingly provided with an internal thread 131.
  • the second end region of the ejection bell 13 has a connection region, for example, provided with an external thread 132 for connection to the outer drill pipe.
  • a balance bar 14 is mounted, which is equipped with a connection portion 141 to the inner drill string.
  • the opposite head-like extended end portion 142 of the balance bar 14 projects in the assembled state into the receptacle 83 of the flushing shaft 8.
  • the balancing bar 14 has following the head-like end portion 142 has a portion 143 with a polygonal cross section.
  • the balance bar 14 is formed octagonal in this section 143.
  • the ejection bell 13 has inside a corresponding region 133 which is also polygonal, such as octagonal, is formed.
  • the cooperating surfaces on the polygonal portion 143 of the balance bar 14 and the polygonal portion 133 of the ejection bell 13 are used for torque transmission from the outer drill string to the inner drill string.
  • the baffle package 9 is housed in the receptacle 83 and held between the bottom 85 of the receptacle 83 and the head-like end portion 142 of the balance bar 14. The impact package 9 clamped in this way prevents axial impacts of the outer hammer 7, which are introduced via the flushing shaft 8, from being transmitted to the compensation rod 14 and the inner drill pipe.
  • the axial impacts generated by the outer hammer are thus transmitted only via the outer drill pipe.
  • the baffle package also prevents blows from the pneumatically operated downhole hammer unit from being transmitted to the outer drill string via the inner drill string.
  • the baffle package thus ensures a largely complete decoupling of the two striking mechanisms.
  • the decoupling is further supported by the fact that the supply bore 84 at the bottom of the receptacle 83 opens into the flushing shaft 8. Because of the high pressure with which the flushing medium is fed, formed in operation between the bottom 85 of the receptacle 83 and the baffle package, an air cushion, which provides for additional decoupling of the impact systems.
  • Fig. 4 shows schematically the baffle package 9. It consists of a sequence of annular steel discs 91 and elastomeric discs 92.
  • the outer discs of the baffle package 9 are steel discs.
  • the elastomeric disks 92 have a thickness r, which is about the simple to about two and a half times the thickness t of the steel disks 91.
  • the overall axial height h of the baffle package is about 35 mm to about 105 mm.
  • the elastomeric disks 92 have an outer diameter which is smaller than that of the steel disks 91. As a result, they can freely expand radially during the axial compression.
  • the elastomeric discs Due to the fully clamped arrangement of the elastomer discs in the recording of the Rinsing wave used impact package, the elastomeric discs can only deform controlled in the impact damping. The heat dissipation through the steel discs ensures that the elastomer discs are not transferred in a flowable state.
  • the invention proposes a rotary impact drilling machine with two independent, decoupled striking mechanisms and components essential to the invention.
  • the operation of such a rotary impact drilling machine allows higher drilling speeds with longer service lives of the components. Because of the modular structure of the system and components also existing rotary drilling rigs without much difficulty according to the invention can be converted.

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

Abstract

L'invention concerne un arbre de rinçage destiné à être monté dans une tige de forage extérieure (5) d'une installation de forage par roto-percussion (1), comprenant un mécanisme de percussion à superposition. En l'occurrence, l'installation de forage par roto-percussion (1) présente un trépan central (3) qui est entraîné en rotation et qui est sollicité par un marteau de fond de trou (4) par des percussions axiales, ainsi qu'une couronne de fleuret (6) sollicitée par des percussions axiales par un marteau extérieur (7) et entraînée en rotation. L'arbre de rinçage (8) présente un corps cylindrique dont les régions d'extrémité axiales présentent des filetages de raccordement normés (81, 82) pour la connexion à la tige de forage extérieure (5) ou au marteau extérieur (7), et qui présente à sa partie d'extrémité tournée vers le marteau de fond de trou (4) dans l'état monté, un logement (83) de type trou borgne, qui est en liaison avec un alésage d'alimentation (94) pour le marteau de fond de trou (4). Dans le logement (83) est disposé un paquet d'impact (9) qui comprend une pluralité de disques d'acier (91) de forme annulaire circulaire, et de disques en élastomère (92), de préférence vulcanisés. En l'occurrence, un disque en élastomère (92) est toujours disposé entre deux disques en acier (91).
EP07720159.8A 2006-05-24 2007-05-23 Arbre de rinçage pour la tige de forage d'une installation de forage par roto-percussion, paquet d'impact pour un arbre de rinçage et installation de forage par roto-percussion Active EP2029851B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH8412006 2006-05-24
PCT/CH2007/000262 WO2007134478A1 (fr) 2006-05-24 2007-05-23 Arbre de rinçage pour la tige de forage d'une installation de forage par roto-percussion, paquet d'impact pour un arbre de rinçage et installation de forage par roto-percussion

Publications (2)

Publication Number Publication Date
EP2029851A1 true EP2029851A1 (fr) 2009-03-04
EP2029851B1 EP2029851B1 (fr) 2018-08-29

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EP07720159.8A Active EP2029851B1 (fr) 2006-05-24 2007-05-23 Arbre de rinçage pour la tige de forage d'une installation de forage par roto-percussion, paquet d'impact pour un arbre de rinçage et installation de forage par roto-percussion

Country Status (2)

Country Link
EP (1) EP2029851B1 (fr)
WO (1) WO2007134478A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101960692B1 (ko) * 2018-07-31 2019-03-20 창신인터내셔날 주식회사 머드로 구동되는 천공용 해머
CN114837592B (zh) * 2022-05-24 2024-01-26 中煤科工集团重庆研究院有限公司 一种煤矿井下岩心管保直钻进装备及钻进方法

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Publication number Priority date Publication date Assignee Title
DE1298066B (de) * 1967-06-07 1969-06-26 Boehler & Co Ag Geb Vorrichtung zum UEberlagerungsbohren
DE2459982C3 (de) * 1974-12-18 1978-05-03 Sandvik Ab, Sandviken (Schweden) Kupplungsvorrichtung zur Verbindung einer Dreh-Schlag-Bohrmaschine mit einem Doppelgestänge
US4257245A (en) * 1979-09-13 1981-03-24 Well Control, Inc. Compression shock absorber device
DE3503893C1 (de) * 1985-02-06 1985-10-24 Ing. Günter Klemm, Spezialunternehmen für Bohrtechnik, 5962 Drolshagen Bohrvorrichtung
EP0358786A1 (fr) * 1988-09-13 1990-03-21 Ing. G. Klemm Bohrtechnik GmbH Dispositif de forage superposé
CH683860A5 (de) * 1991-11-08 1994-05-31 Renfer Heinz Bohrverfahren und Einrichtung zur Ausübung des Verfahrens.
DE19616751A1 (de) * 1996-04-26 1997-10-30 Klemm Ingrid Überlagerungsbohrvorrichtung

Non-Patent Citations (1)

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Title
See references of WO2007134478A1 *

Also Published As

Publication number Publication date
EP2029851B1 (fr) 2018-08-29
WO2007134478A1 (fr) 2007-11-29

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