EP2029851B1 - 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 Download PDF

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Publication number
EP2029851B1
EP2029851B1 EP07720159.8A EP07720159A EP2029851B1 EP 2029851 B1 EP2029851 B1 EP 2029851B1 EP 07720159 A EP07720159 A EP 07720159A EP 2029851 B1 EP2029851 B1 EP 2029851B1
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EP
European Patent Office
Prior art keywords
hammer
percussive
drill pipe
disks
hole
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EP07720159.8A
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German (de)
English (en)
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EP2029851A1 (fr
Inventor
Marcel Dell'anna
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BTD BOHRTECHNIK AG
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Btd Bohrtechnik AG
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Publication of EP2029851A1 publication Critical patent/EP2029851A1/fr
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    • 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.
  • the two drill heads are acted upon by a hydraulic hammer arranged outside the borehole.
  • 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 are 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 the rotary drive acted upon by 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 hammers are mainly used in medium-hard to very hard rock and already have acceptable drilling speeds.
  • an overburden drilling apparatus which has a downhole hammer and an outer hammer which impacts the outer linkage with impacts.
  • 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 proposed.
  • the pneumatic damping member is relatively expensive, requires a complicated construction and is therefore not practical.
  • 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, it can relatively soon damage the Imlochhammers or the drill pipe.
  • a flushing shaft for the drill string of a rotary impact drilling machine which has the features mentioned in the characterizing portion of 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. Further developments and / or advantageous embodiments of the invention are the subject of the respective dependent claims.
  • the inventive flushing shaft is designed for installation in an outer drill pipe of a rotary impact drilling with a superimposed impact.
  • the rotary impact drill has a arranged on an inner drill string central drill bit, which is rotationally driven and is acted upon by a punch hammer with axial blows, and a rotationally driven and acted upon by an external hammer with axial strokes drill bit, the so on the inner drill string receiving outer drill string is arranged to lag behind the central drill bit.
  • the flushing shaft has a cylindrical body, at the axial end of 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 downhole hammer facing end portion has a blind hole-like recording with a supply hole for the Imlochhammer communicates.
  • a baffle package is arranged, which comprises a number of annular steel discs and, preferably vulcanized, elastomer discs. In this case, an elastomer 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. If he wants to operate the rotary hammer drill as a conventional, known from the prior art system, for example, has only one, acting jointly on the central drill bit and drill bit outer hammer or equipped only with a hole hammer, instead of the inventive flushing wave with baffle a conventional flushing shaft are installed in the drill pipe.
  • the inventive flushing wave with baffle is based on the drilling direction behind the Imlochhammer inserted into the outer drill pipe simply.
  • the baffle package is a composite of steel discs and elastomer discs clamped in the receptacle of the flushing shaft.
  • the elastomeric disks are always arranged between two steel discs.
  • the steel disks serve to stiffen the impact package mechanically and ensure a good distribution of the impact energy over the entire surface of an elastomer disk.
  • they serve to dissipate the heat occurring in the damping of shocks.
  • the flushing shaft is cylindrical and has at its two end portions connecting thread for the coupling to the outer drill pipe.
  • the connecting threads 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 disposed on the end of the purging shaft facing the Imlochhammer and communicates with a supply hole for the Imlochhammer in connection.
  • 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, however, 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.
  • 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 recording 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.
  • 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 a downhole hammer, and a drill bit which is rotationally driven and subjected to axial impacts by its own outer hammer and is thus arranged on an outer drill string receiving the inner drill string, that it lags against the central drill bit, is for decoupling of the Imlochhammer and the axial hammer generated by the outer hammer with a clamped baffle package, which consists of a composite of steel discs and elastomer discs equipped.
  • 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 transferred from the downhole hammer to the central drill bit is not dependent on the drill hole depth or the length of the inner drill string. Rather, the axial impacts of the Imlochhammers are always introduced at the same distance from the drill hole on the inner drill string in the central drill bit.
  • 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 on the particular application and surface tunable. 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. Fractures of the drill string within the wellbore, for example, in threaded areas of the modular drill pipe can thereby be largely prevented.
  • the arrangement of the baffle in a flushing wave increases the modularity of the system, which can be operated without this flushing wave if necessary. This preserves flexibility for the user. If he the rotary hammer drill as a conventional, known from the prior art Plant want to operate, for example, only one, acting jointly on the central drill bit and drill bit outer hammer or is equipped only with a downhole hammer, instead of the inventive flushing wave with baffle a conventional flushing wave can be installed in the drill pipe. If the rotary hammer drill, however, again work with two independently acting impact systems, simply the invention according to the flushing wave with the baffle package based on the drilling direction behind the Imlochhammer inserted into the outer drill pipe.
  • the outer 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.
  • 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 operation The in-hole hammer is easier to accomplish than, for example, a hydraulic operation. Leakage of the pneumatic within the wellbore is less critical than in hydraulic operation.
  • the schematic representation in Fig. 1 shows an embodiment of the present invention trained rotary impact drilling, 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 in-hole hammer 4, the pneumatic operated is.
  • the Imlochhammer 4 is supplied via a central bore 10 with the required compressed air and applied in 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 which has been comminuted by the drill heads at the drillhole.
  • the flushing medium is a mixture of compressed air and water.
  • 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 are 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 string 2, 5 is modular and extendable arbitrarily what is in Fig. 1 is indicated by interrupt 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 on the particular application and background tunable. 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. Fractions of the drill string 2, 5 within the wellbore, for example in threaded areas of the modular drill pipe 2, 7, can be largely prevented.
  • FIG. 2 and 3 Details of a rotary hammer drill according to the invention are shown.
  • the illustrated components bear for better understanding the same reference numerals as the corresponding components in the overview 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 are an inventive flushing shaft 8 with a baffle package 9 and an ejection bell 13 with a balance bar 14 in an extended state ( Fig.2 ) and in the assembled state ( Fig. 3 ).
  • 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 pointing in the drilling direction end portion is provided with an external thread 82.
  • the end region of the flushing shaft 8 facing the through-hole hammer in the assembled state 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 in Fig. 1 illustrated flushing ring surrounds the flushing shaft in the region of the mouth and ensures the supply of the flushing medium, for example a mixture of compressed air and water, through the supply hole 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, for example, octagonal, is formed.
  • the cooperating surfaces on the polygonal section 143 of the balance bar 14 and on the polygonal section 133 of the ejector bell 13 serve to transmit torque from the outer drill pipe to the inner drill pipe.
  • Fig. 3 shows the assembled with the ejection bell 13 Spülwelle 8.
  • the baffle package 9 is housed in the receptacle 83 and held between the base 85 of the receptacle 83 and the head-like end portion 142 of the balance bar 14.
  • the thus clamped impact package 9 prevents axial shocks of the outer hammer 7, which are introduced via the flushing shaft 8, are transmitted to the balance bar 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 punching unit from being transmitted to the outer drill pipe 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, an air cushion forms during operation between the base 85 of the receptacle 83 and the baffle package, which ensures an additional decoupling of the beating systems.
  • Fig. 4 schematically shows 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 the components and existing rotary percussion drilling without major difficulties according to the invention are convertible.

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Claims (16)

  1. Arbre de rinçage pour le montage dans une tige de forage extérieure (5) d'une installation de forage par roto-percussion (1) qui présente un trépan de forage central (3), placé sur une tige de forage intérieure (2), qui est entraîné en rotation et qui est frappé par un marteau fond de trou (4) avec des coups axiaux et qui possède une couronne de forage (6), entraînée en rotation et frappée par un marteau extérieur (7) avec des coups axiaux, qui est placée sur la tige de forage extérieure (5) qui loge la tige de forage intérieure (2) de telle manière qu'elle est entraînée en retard par rapport au trépan de forage central (3), lequel arbre de rinçage (8) présente un corps cylindrique dans les zones d'extrémité axiales duquel des filets de raccord normalisés (81, 82) sont prévus pour la jonction avec la tige de forage extérieure (5) ou avec le marteau extérieur (7) et qui présente un ensemble percussif pour le découplage du marteau fond de trou (4) du marteau extérieur (7), caractérisé en ce que le corps cylindrique présente, dans sa zone d'extrémité tournée, à l'état monté, vers le marteau trou de fond (4), un logement de type trou borgne (83) qui est en relation avec une forure d'alimentation (84) pour l'alimentation d'un agent de rinçage pour le marteau trou de fond (4) et dans lequel l'ensemble percussif (9) est placé et que l'ensemble percussif (9) comprend un groupe de disques d'acier (91) et de disques d'élastomère en forme d'anneaux circulaires, cependant qu'un disque d'élastomère (92) est placé respectivement entre deux disques d'acier (91).
  2. Arbre de rinçage selon la revendication 1, caractérisé en ce que la zone d'extrémité du corps pourvue du logement (83) présente un prolongement cylindrique équipé d'un filet extérieur normalisé (82) qui est configuré pour la jonction avec une cloche d'éjection (13) de la tige de forage extérieure (13) et qu'une forure de type trou borgne avec un filet intérieur normalisé (81) est prévue dans la zone d'extrémité opposée du corps.
  3. Arbre de rinçage selon l'une des revendications précédentes, caractérisé en ce que l'ensemble percussif (9) présente un passage central (93).
  4. Arbre de rinçage selon l'une des revendications précédentes, caractérisé en ce que l'ensemble percussif (9) présente une douille (94) qui traverse le passage central (93) des disques d'acier et des disques d'élastomère en forme d'anneaux circulaires (91, 92), équipée d'une forure centrale (96), douille dont la base (95) s'appuie sur le fond (85) du logement (83) dans l'arbre de rinçage (8).
  5. Arbre de rinçage selon l'une des revendications précédentes, caractérisé en ce que les disques d'élastomère (92) présentent un diamètre extérieur plus petit que les disques d'acier (91).
  6. Ensemble percussif pour la mise en place dans un logement de type trou borgne dans un arbre de rinçage d'une tige de forage d'une installation de forage par roto-percussion avec un marteau extérieur et un marteau fond de trou, lequel logement est en relation avec une forure d'alimentation (84) pour l'alimentation d'un agent de rinçage pour le marteau trou de fond (4), comprenant une succession d'un nombre de disques d'acier en forme d'anneaux circulaires (91) et de préférence de disques d'élastomère vulcanisés (92), cependant qu'un disque d'élastomère (92) est placé respectivement entre deux disques d'acier (91).
  7. Ensemble percussif selon la revendication 6, caractérisé en ce que les disques d'élastomère (92) présentent un diamètre extérieur plus petit que les disques d'acier (91).
  8. Ensemble percussif selon la revendication 6 ou 7, caractérisé en ce que la hauteur axiale (r) des disques d'élastomère (92) est approximativement une fois à approximativement deux fois et demie la hauteur axiale des disques d'acier (91).
  9. Ensemble percussif selon la revendication 7, caractérisé en ce que l'ensemble percussif (9) présente une hauteur axiale totale (h) d'environ 35 mm à environ 105 mm.
  10. Ensemble percussif selon l'une des revendications 6 à 9, caractérisé en ce que l'ensemble percussif (9) présente un passage central (93).
  11. Ensemble percussif selon la revendication 10, caractérisé en ce que l'ensemble percussif (9) présente une douille métallique (94) qui traverse le passage central (93) des disques d'acier et des disques d'élastomère en forme d'anneaux circulaires (91, 92), équipée d'une forure centrale (96) dont la base (95) forme un disque d'acier extérieur.
  12. Installation de forage par roto-percussion (1) avec un trépan de forage central (3), placé sur une tige de forage intérieure (2), qui est entraîné en rotation et qui est frappé par un marteau fond de trou (4), et avec une couronne de forage (6) qui est entraînée en rotation et frappée par un marteau extérieur (7) avec des coups axiaux et qui est placée sur une tige de forage extérieure (5) qui loge la tige de forage intérieure (2) de telle manière qu'elle est entraînée en retard par rapport au trépan de forage central (3), cependant que des moyens (8, 9) sont prévus pour le découplage des coups axiaux produits par le marteau fond de trou (4) et par le marteau extérieur (7), caractérisée en ce que les moyens pour le découplage des coups axiaux sont formés par un ensemble percussif selon l'une des revendications 6 à 11.
  13. Installation de forage par roto-percussion selon la revendication 12, caractérisée en ce que l'ensemble percussif est placé dans un arbre de rinçage selon l'une des revendications 1 à 4.
  14. Installation de forage par roto-percussion selon la revendication 12 ou 13, caractérisée en ce que le marteau extérieur (7) fonctionne de manière hydraulique.
  15. Installation de forage par roto-percussion selon l'une des revendications 12 à 14, caractérisée en ce que le marteau fond de trou (4) fonctionne de manière pneumatique.
  16. Procédé pour faire fonctionner une installation de forage par roto-percussion (1) avec un trépan de forage central (3), placé sur une tige de forage intérieure (2), qui est entraîné en rotation et qui est frappé par un marteau fond de trou (4), et avec une couronne de forage (6) qui est entraînée en rotation et frappée par un marteau extérieur (7) avec des coups axiaux et qui est placée sur une tige de forage extérieure (5) qui loge la tige de forage intérieure (2) de telle manière qu'elle est entraînée en retard par rapport au trépan de forage central (3), cependant que les coups axiaux du marteau trou de fond (4) et du marteau extérieur (7) sont en grande partie découplés les uns des autres, caractérisé en ce qu'un ensemble percussif encastré (9), qui est composé d'un ensemble de disques d'acier (91) et de disques d'élastomère (92) en forme d'anneaux circulaires, est utilisé pour le découplage des coups axiaux du marteau trou de fond (4) et du marteau extérieur (7), cependant qu'un disque d'élastomère (92) est placé respectivement entre deux disques d'acier (91) et cependant que l'ensemble percussif (9) est placé dans un logement de type trou borgne (83) dans un arbre de rinçage dans la tige de forage extérieure (5), lequel logement (83) est en relation avec une forure d'alimentation (84) pour l'alimentation d'un agent de rinçage pour le marteau trou de fond (4).
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

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

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CN114837592A (zh) * 2022-05-24 2022-08-02 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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KR101960692B1 (ko) * 2018-07-31 2019-03-20 창신인터내셔날 주식회사 머드로 구동되는 천공용 해머

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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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114837592A (zh) * 2022-05-24 2022-08-02 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
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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