WO2000057019A1 - Dispositif de forage - Google Patents

Dispositif de forage Download PDF

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Publication number
WO2000057019A1
WO2000057019A1 PCT/AT1999/000070 AT9900070W WO0057019A1 WO 2000057019 A1 WO2000057019 A1 WO 2000057019A1 AT 9900070 W AT9900070 W AT 9900070W WO 0057019 A1 WO0057019 A1 WO 0057019A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill bit
inner part
coupling
drilling
outer part
Prior art date
Application number
PCT/AT1999/000070
Other languages
German (de)
English (en)
Inventor
Josef Mocivnik
Karl BÖHM
Original Assignee
Techmo Entwicklungs- Und Vertriebs Gmbh
Alwag Tunnelausbau Gesellschaft Mbh
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 Techmo Entwicklungs- Und Vertriebs Gmbh, Alwag Tunnelausbau Gesellschaft Mbh filed Critical Techmo Entwicklungs- Und Vertriebs Gmbh
Priority to AU29108/99A priority Critical patent/AU2910899A/en
Priority to PCT/AT1999/000070 priority patent/WO2000057019A1/fr
Publication of WO2000057019A1 publication Critical patent/WO2000057019A1/fr

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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • 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 present invention relates to a device for drilling, in particular percussion or rotary percussion drilling, of boreholes, comprising a drill bit, which consists of a central inner part and a releasably coupled outer part which annularly surrounds the inner part, with a releasable coupling between the central inner part and the annular part of the drill bit is formed by at least two projections arranged on one of the mutually facing circumferential surfaces of the inner part and the outer part and complementary recesses cooperating therewith on the other circumferential surface of the inner part or the outer part.
  • Devices of this type for drilling boreholes with a multi-part drill bit which essentially consist of a central inner part or a pilot drill bit and a detachably coupled outer part or an annular drill bit, are known in different embodiments, with reference, for example, to AT-B 390 303 or WO 94/12760 can be referenced.
  • the central inner part and the outer part of the drill bit which surrounds the inner part in a ring, are mutually locked by means of complex and in part difficult to coordinate coupling and locking elements, which, in particular in the known design according to WO 94/12760, have a large number of one another connectable parts required.
  • a device of the type mentioned at the outset can also be found in GB-A 1 068 638, the pilot drill bit and the ring drill bit being connected in the manner of a bayonet lock, but a plurality of contact surfaces are required to transmit the impact energy, each of which involves energy losses are expected.
  • a disadvantage of these known constructions is generally the fact that with the complex constructions used, precise coordination of the individual parts with small tolerances is required. lent, which may result in disadvantages in connection with a detachment of at least the central inner part from the annular outer part, which is usually desired after the drilling process has been carried out.
  • the aim of the present invention is now to provide, on the basis of a device of the type mentioned at the outset, an embodiment with which a reduction in the total drilling time can be achieved in comparison with known embodiments, not only in a reduction in those required for the actual drilling Time, but overall is aimed at a reduction in the total drilling time, in particular through rapid removal of the mined material and any necessary changeover times.
  • the device according to the invention based on a device of the type mentioned at the outset, is essentially characterized in that the central inner part of the drill bit, which is coupled to the annular outer part via coupling elements, has at least one outlet opening for introducing a fluid into the one in front of the drill bit Has space and that the drill bit is formed with at least one opening for the passage of the fluid with the degraded material into an area lying behind the excavation surface of the drill bit.
  • the drill bit has at least one outlet opening for introducing a fluid into the space in front of the drill bit and at least one opening for the passage of the fluid with the material removed. rial in an area behind the surface of the drill bit. In this way, mined material can be transported directly to an area behind the surface of the drill bit.
  • the mined material is essentially brought out of the borehole inside a cladding tube or the drill pipe, there are particularly narrow spaces between the outer circumference of a cladding tube and the borehole wall, which are generally aimed at in the sense of optimizing or reducing the entire borehole area problems with the insertion of the cladding tube, which can subsequently lead to an extension of the entire drilling time.
  • the drill bit and / or a cladding tube has at least one recess or opening for at least partially dispensing the fluid with the degraded material into the intermediate space between the cladding tube and the borehole wall.
  • the at least partial discharge of the fluid with the dismantled material in the annular space between the cladding tube and the borehole wall results in a lubricating effect due to the fluid and the granular, degraded material, so that an essentially frictionless introduction of the cladding tube is supported.
  • the drill bit be formed in an area behind the excavation area with an additional outlet opening for the fluid, this additional outlet opening opening in the direction away from the drill surface of the drill bit, whereby through a such an additional outlet opening for the fluid, a pulse is introduced in the direction of an unimpeded or as quickly as possible delivery of the mined material together with the fluid from the area of the drill bit.
  • the cross-sectional area of the additional outlet opening be a maximum of 30%, preferably approximately 10-15%, of the cross-sectional area of the area in front of the cutting surface of the drill bit opening opening for the fluid.
  • the coupling projections for releasable coupling between the central inner part and the annular part of the drill bit are formed projecting from the inner circumference of the annular inner circumference of the annular outer part, which have complementary coupling recesses on the outer circumference of the central inner part cooperate, each recess consisting of a substantially extending in the direction of the axis and a substantially normal thereon, extending over a portion of the circumference and extending in the circumferential direction.
  • the coupling elements proposed according to the invention which are formed on the one hand from projections arranged on one of the circumferential surfaces of the inner part and the outer part and on the other hand complementary recesses interacting with these projections, a special configuration for the recesses also being proposed according to the invention, is a reliable coupling guaranteed between the individual parts of the drill bit in the operating state. Furthermore, the coupling elements which can be designed to be correspondingly robust, simply by absorbing the large stresses occurring during the drilling process, after completion of the borehole or in the case of necessary retrofitting work, can achieve a simple and time-saving separation of the individual elements of the drill bit, so that overall a shortening tion of the total time required for the production of a borehole can be achieved compared to known embodiments.
  • three coupling projections and recesses are provided, in particular, evenly distributed over the circumference of the mutually facing circumferential surfaces of the inner part and the outer part.
  • a uniform distribution of the coupling projections and recesses over the circumference of the interacting circumferential surfaces a correspondingly simple and safe positioning of the inner part and the outer part of the drill bits can be achieved. If the coupling projections and recesses are not arranged evenly distributed over the circumference, this can simply be used to take account of any asymmetries in the stop pattern or the like, if any, in order to achieve a desired, relative positioning between the inner part and the outer part.
  • the coupling projections and the coupling recesses in their circumferentially extending section are at least partially designed with mutually coordinated, inclined surface areas which are in the fully coupled state of the parts of the drill bit result in an essentially play-free fit between the inner part and the outer part, as corresponds to a further preferred embodiment of the device according to the invention.
  • the coupling projections are designed in an end region with a particularly elastic elevation, which in a fully coupled state of the parts of the drill bit in a stepped Area of the associated respective coupling recess is arranged.
  • the annular outer part is formed with at least one recess or an extension on its end face facing away from the mining surface which cooperates with a complementary extension or a recess of an adjoining cladding tube or impact shoe.
  • Such an extension and a complementary recess can provide an essentially stationary stop for detaching the individual parts of the drill bit from one another, so that a correspondingly firm coupling or a correspondingly tight fit is maintained between the central inner part and the annular outer part for carrying out the drilling work can be.
  • the extraction tools of the annular outer part of the drill bit are arranged in such a way that the stop pattern of the borehole formed by them in the direction to the central inner part of the drill bit essentially corresponds to the inner diameter of the casing tube or an impact shoe coupled thereto, it being provided in particular that the outer diameter of the central inner part of the drill bit is slightly smaller than the inner diameter of the casing pipe or an impact shoe coupled with it and interacting with the outer part.
  • this coordination of the area of the ring-shaped outer part or the ring drill bit selected for the formation of the borehole relative to the area of the central inner part or the pilot drill bit can ensure that in the sense of an optimization of the drilling performance and thus in the sense of an optimization or shortening of the for the time required to produce a borehole, the area of the central inner part of the drill bits can be chosen to be as large as possible in comparison with the area of the outer ring drill bit.
  • a relative enlargement of the area of the central inner part of the drill bit relative to the ring-shaped outer part surrounding this inner part contributes to an increase in the mining capacity or drilling capacity in particular in that the forces required for the formation of the borehole are essentially direct in the sense of a through the central inner part
  • Reduction of the material to be mined can be introduced, while in the area of the coupling point between the central inner part and the ring-shaped outer part, despite the play-free coupling provided according to the invention, losses occur during the transmission of the forces, which lead to a reduced removal capacity of the ring drill bit compared to the central inner part or the pilot drill bit.
  • FIG. 1 shows, partly in section, a schematic side view of a first embodiment of a drilling device according to the invention
  • FIG. 2 on an enlarged scale, again partly in section, a view of the central inner part of the drill bit of the device for drilling according to the invention
  • FIG. 3 shows an end view of the central inner part of the drill bit according to FIG. 2;
  • FIG. 4 shows a front view of the annular outer part of the drill bit in a representation similar to FIG. 3;
  • Figure 5 is a partial sectional view through the annular outer part of the drill bit.
  • 6 shows a detailed view of part of a coupling recess on the central inner part of the drill bit; 7 shows, on a further enlarged scale, a further detailed view of a part of the coupling element on the central inner part of the drill bit;
  • FIG. 8 shows a detailed view of the coupling element on the annular outer part of the drill bit in a representation corresponding to FIG. 7;
  • FIG. 9 is a side view, partly in section, of a striking shoe which interacts with the ring drill bit when the pilot drill bit is released; and FIG. 10 shows, in a representation similar to FIG. 1, a side view, partly in section, through a modified embodiment of a device for drilling according to the invention.
  • Fig. 1, 1 generally designates a device for drilling a borehole schematically indicated by 2, the device consisting of a split drill bit which has a central inner part or a pilot drill bit 3 and an outer part or an annular drill bit surrounding the central inner part 4 has. Both the pilot drill bit 3 and the ring drill bit 4 have corresponding removal tools, which are indicated schematically by 5. At least one outlet opening 6 for a fluid for the removal of the removed material opens into the area directly in front of the pilot drill bit or the central inner part 3.
  • the applied fluid is quickly and reliably applied through an opening, indicated schematically by 7, into an area behind the extraction surface or the removal tools 5 of the central inner part of the drill bit and subsequently defined by an between a cladding tube 8 and a drill pipe 9 Free space removed.
  • a further outlet opening 10 opens out in a rear region, through which fluid is likewise discharged, so that an additional Pulse is conveyed in the direction of removal, which can optimize or shorten the drilling time.
  • the mining tools 5 are arranged on the ring drill bit 4 in such a way that they define an effective outer diameter of the borehole 2, which exceeds the outer dimensions of the cladding tube 8 by a small percentage, for example approximately 5 to 10% to allow proper penetration of the cladding tube 8.
  • a free space prevents friction between the borehole wall and the cladding tube 8, so that it can be found even with very thin-walled cladding tubes 8, since excessive damage to the cladding tube is not to be expected.
  • Fig. 1 is already indicated schematically that for coupling the central inner part 3 and the annular outer part 4 of the drill bit, a corresponding interlocking of the individual parts 3 and 4 takes place, as will be clearly seen with reference to the other figures.
  • FIG. 2 shows the central inner part or the pilot drill bit 3 on an enlarged scale, the reference numerals of FIG. 1 being retained for identical components.
  • the pilot drill bit is at least partially formed with a recess 13 extending in the radial direction, in which a corresponding Coupling element of the annular outer part 4 engages.
  • the pilot drill bit 3 is provided with a stop 14 in the area facing away from the mining area, this stop 14 cooperating with the impact shoe 11 shown in FIG. 1, the impact shoe 11 essentially during the drilling process for a safe carrying of the adjoining, optionally thin-walled cladding tube 8 is used.
  • pilot drill bit 3 additionally has recesses 15 running in the direction of the longitudinal axis of the drill bit, each of which merges into the recesses 13 which are essentially normal thereon and thus run along the circumference and which have already been designated by 13 in FIG. 2, wherein one of these recesses 13 can be seen in the partial sectional view according to FIG. 3.
  • the ring drill bit 4 is designed with corresponding coupling projections 16 which can be displaced in the recesses 15 in the direction of the axis of the drill bit, whereupon after the translational movement by means of a rotary movement, a secure locking and anchoring the pilot drill bit 3 in the annular outer part 4 is made possible.
  • each of the coupling projections 16 on the inner circumference of the ring drill bit 4 is additionally formed with a beveled partial area 17, an additional, in particular elastic, one in each end area of the coupling projections 16 Survey 18 is provided, which is a safe Anchoring in the assembled state of the drill bit enables.
  • the coupling recesses 13, which run essentially in the circumferential direction, are also formed on the ring core bit 4, which is only partially shown, with surface sections 13 ', 13 "and 13"' in each case with different inclinations in order to facilitate insertion the coupling projections 16 of the ring drill bit 4 as well as a secure and play-free locking.
  • FIG. 7 shows a side view of the area of a circumferentially extending recess 13
  • FIG. 8 shows a side view of one of the coupling projections 16
  • both the recess 13 and the surfaces of the coupling protrusion 16 are each formed with mutually inclined side surfaces or regions offset from one another, the elevation on one of the coupling protrusions 16 being shown schematically in FIG. 8 both in FIG. 8 and in dashed lines with 18 ′ in FIG. 7 in the coupled state , wherein the coupling element is not shown in FIG. 7 for the sake of clarity.
  • the coupling between the pilot drill bit 3 and the ring drill bit 4 is sufficiently firm, for example, to enable individual drill pipe parts to be detached from one another, which are connected, for example, by a screw connection, for an extension of the drill pipe, without that at the same time the coupling between the ring core bit 4 and the pilot core bit 3 is released.
  • the partially bevelled upper surface areas of both the coupling or guide grooves 13 on the pilot drill bit 3 and the coupling projections 16 in the coupled state a play-free fit between the parts 3 and 4 of the drill bit, so that the required forces can also be transmitted without further notice.
  • the relative dimensions between the pilot drill bit 3 and the ring drill bit 4 are such that the pilot drill bit 3 has a maximum area relative to the ring drill bit 4 in order to maximize the mining result or the drilling performance accordingly.
  • the removal tools provided on the pilot drill bit 3 are positioned such that they are adapted both to the inner contours of the annular outer part or the ring drill bit 4 and to the inner diameter of the impact shoe 11 and the cladding tube 8 adjoining it, in such a way that they a subsequently required removal of the pilot drill bit 3 with the least possible play from the ring drill bit 4 after loosening the coupling elements.
  • the proposed relative dimensioning between the pilot drill bit 3 and the ring drill bit 4, which covers a comparatively small excavation area, also makes it possible to continue mining even after the ring drill bit 4 has been uncoupled from the pilot drill bit 3, since the pilot drill bit has a correspondingly larger excavation area.
  • the coupling between the ring drill bit 4 and the pilot drill bit 3 via the coupling elements 13, 15 and 16 is sufficiently high not to be released erroneously, for example when changing or extending the drill pipe.
  • the procedure is such that the pilot drill bit 3 is raised slightly out of the borehole in the direction of the drill pipe 9, as a result of which the rear of the annular outer part 4 comes into contact with the corresponding end face of the impact shoe 11, as can be seen from this Fig. 1 can be seen.
  • Hiebei has the ring drill bit 4, as can be seen in particular from Fig.
  • the recess 20 on the impact shoe 11 has an inclined partial region 20 ′ and a partial region running essentially normal to the axis of the drilling device 20 ′′, so that when the drill bit elements 3 and 4 are rotated, the extension 19 bears against the rear of the ring drill bit 4 reaches the end face 21 of the recess 20 of the impact shoe 11 and thus further twisting of the ring drill bit 4 relative to the impact shoe is avoided.
  • the coupling projections 16 thus move in the circumferential recesses 13 on the outer circumference of the pilot drill bit 3 , until the coupling projections 16 reach the region of the longitudinally extending recesses 15, whereupon the pilot drill bit 3 can subsequently be removed from the ring drill bit 4 and can be removed together with the drill pipe 9 from the borehole 2, with the simple coupling very short changeover times in Result in a reduction in the total drilling time.
  • the depth of the recess 20 on the front end face of the impact shoe 11 is greater than the dimensions of the extension 19 on the back of the ring core bit 4, so that even when penetrated material penetrates into the region of the recess 20, the extension or the recesses can be held securely Extensions 19 distributed over the circumference take place in corresponding recesses 20 in order to enable the pilot drill bit 3 to be detached from the ring drill bit 4 and to be subsequently brought out.
  • FIG. 10 shows a modified embodiment of a device 1 for drilling, again with a central inner part or a pilot drill bit 3 in an annular shaped outer part or a ring drill bit 4 is mounted. Similar to the embodiment according to FIG. 1, a fluid is discharged into the area in front of the dismantling tools 5 of the pilot drill bit 3 via at least one opening 6, whereupon the fluid with the dismantled material quickly and reliably flows into an behind through an opening 7 the area located for further removal is transported between the drill pipe 9 and the cladding tube, again designated 8.
  • FIG. 10 shows a modified embodiment of a device 1 for drilling, again with a central inner part or a pilot drill bit 3 in an annular shaped outer part or a ring drill bit 4 is mounted.
  • a fluid is discharged into the area in front of the dismantling tools 5 of the pilot drill bit 3 via at least one opening 6, whereupon the fluid with the dismantled material quickly and reliably flows into an behind through an opening 7 the area located for further removal is transported between the
  • At least one additional passage opening 22 is provided in an area immediately behind the ring drill bit 4, via which a portion of the fluid with degraded material reaches the free space provided between the borehole 2 and the outer circumference of the cladding tube 8, as indicated schematically by the individual arrows.
  • An additional outlet opening 10 can also be seen in the design according to FIG. 10, which gives the flow of fluid with degraded material running within the cladding tube 8 a corresponding additional impulse. Due to the fact that, in the embodiment according to FIG. 10, at least a part of the fluid with degraded material is brought into the annular space outside the cladding tube 8, the possibility of a frictionless introduction of the cladding tube 8 takes place in the manner of a lubrication, which also helps to minimize the drilling time becomes.
  • Device for drilling, in particular percussion or rotary percussion drilling, of drill holes comprising a drill bit which consists of a central inner part (3) and a detachably coupled outer part (4) surrounding the inner part (3) in an annular manner, a releasable coupling between the central inner part (3) and the annular part (4) of the drill bit by at least two projections (16) arranged on one of the mutually facing peripheral surfaces of the inner part (3) and the outer part (4) and complementary recesses (13 , 15) is formed on the other peripheral surface of the inner part (3) or of the outer part (4), characterized in that the central inner part (3) of the ring-shaped outer part (4) coupled via coupling elements (13, 15, 16)
  • the drill bit has at least one outlet opening (6) for introducing a fluid into the space in front of the drill bit and that the drill bit has at least one through hole invoice (7) for the passage of the fluid with the removed material into an area behind the extraction surface of the drill bit.
  • Apparatus according to claim 1 or 2 characterized in that the drill bit is formed in an area behind the mining area with an additional outlet opening (10) for the fluid, said additional outlet opening (10) in the direction away from the mining surface of the drill bit flows.
  • the device according to claim 3 characterized in that the cross-sectional area of the additional outlet opening (10) a maximum of 30%, preferably about 10-15%, of the cross-sectional area of the outlet opening (6) for the fluid opening into the area in front of the mining area of the drill bit.
  • annular outer part (4) is formed on its end face facing away from the mining surface with at least one recess or an extension (19) which (r) with a complementary extension or a recess (20) of an adjoining cladding tube (8) or impact shoe (11) cooperates.
  • the height of the extension (19) in the direction of the axis of the drill bits is less than the depth of the cooperating recess (20), at least the recess (20) being substantially in Has circumferential portion (20 ") and an adjoining it at an acute angle, inclined portion (20 ').

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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)

Abstract

L'invention concerne un dispositif de forage, notamment de forage percutant ou rotopercutant. Ce dispositif comprend une couronne à diamants constituée d'une partie intérieure centrale (3) et d'une partie extérieure (4) accouplée à cette dernière de manière libérable et entourant cette dernière de manière annulaire. Un accouplement libérable entre la partie intérieure centrale (3) et la partie annulaire (4) de la couronne à diamants est formé par au moins deux parties saillantes (16) situées sur l'une des surfaces périphériques, orientées l'une vers l'autre, de la partie intérieure (3) et de la partie extérieure (4), et par des évidements complémentaires (13, 15), coopérant respectivement avec lesdites parties saillantes, situés sur l'autre surface périphérique de la partie intérieure (3) ou de la partie extérieure (4). Selon l'invention, la partie centrale intérieure (3) de la couronne à diamants, accouplée à la partie extérieure annulaire (4) par l'intermédiaire d'éléments d'accouplement (13, 15, 16), présente au moins une ouverture de sortie (6) servant à introduire un fluide dans la zone située devant la couronne à diamants. De plus, cette dernière présente au moins un passage (7) permettant au fluide chargé de matière extraite de passer dans une zone située derrière la surface de forage de la couronne à diamants, ce qui permet de réduire et d'optimiser la durée de forage.
PCT/AT1999/000070 1999-03-18 1999-03-18 Dispositif de forage WO2000057019A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU29108/99A AU2910899A (en) 1999-03-18 1999-03-18 Device for drilling bore holes
PCT/AT1999/000070 WO2000057019A1 (fr) 1999-03-18 1999-03-18 Dispositif de forage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AT1999/000070 WO2000057019A1 (fr) 1999-03-18 1999-03-18 Dispositif de forage

Publications (1)

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WO2000057019A1 true WO2000057019A1 (fr) 2000-09-28

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WO (1) WO2000057019A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046330A1 (fr) * 2001-11-30 2003-06-05 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage de trous
WO2003062589A1 (fr) * 2002-01-17 2003-07-31 Presssol Ltd. Systeme de forage dote de deux trains de forage
WO2004018827A1 (fr) * 2002-08-21 2004-03-04 Presssol Ltd. Forage directionnel et horizontal a circulation inverse utilisant un train de tiges de forage concentrique
US6854534B2 (en) 2002-01-22 2005-02-15 James I. Livingstone Two string drilling system using coil tubing
WO2005033467A1 (fr) * 2003-10-08 2005-04-14 Techmo Entwicklungs- Und Vertriebs Gmbh Procédé et dispositif permettant de creuser des trous dans des sols ou des roches
US7090018B2 (en) 2002-07-19 2006-08-15 Presgsol Ltd. Reverse circulation clean out system for low pressure gas wells
US7343983B2 (en) 2004-02-11 2008-03-18 Presssol Ltd. Method and apparatus for isolating and testing zones during reverse circulation drilling
US8408337B2 (en) 2004-02-12 2013-04-02 Presssol Ltd. Downhole blowout preventor
US10975664B2 (en) 2018-08-17 2021-04-13 Ancor-Loc (Nz) Limited Well or bore clearing tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB979984A (en) * 1962-09-19 1965-01-06 John A Court Bergne Improved means for mineral sampling of gravels and other submerged or water bearing strata
DE2924393A1 (de) * 1979-06-16 1980-12-18 Brueckner Grundbau Gmbh Bohrvorrichtung zum ueberlagerungsbohren
US5178223A (en) * 1990-07-10 1993-01-12 Marc Smet Device for making a hole in the ground
WO1994012760A1 (fr) * 1992-12-03 1994-06-09 Jaervelae Jorma Foreuse
WO1998013575A1 (fr) * 1996-09-25 1998-04-02 Ilomaeki Valto Ensemble trepan

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB979984A (en) * 1962-09-19 1965-01-06 John A Court Bergne Improved means for mineral sampling of gravels and other submerged or water bearing strata
DE2924393A1 (de) * 1979-06-16 1980-12-18 Brueckner Grundbau Gmbh Bohrvorrichtung zum ueberlagerungsbohren
US5178223A (en) * 1990-07-10 1993-01-12 Marc Smet Device for making a hole in the ground
WO1994012760A1 (fr) * 1992-12-03 1994-06-09 Jaervelae Jorma Foreuse
WO1998013575A1 (fr) * 1996-09-25 1998-04-02 Ilomaeki Valto Ensemble trepan

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046330A1 (fr) * 2001-11-30 2003-06-05 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage de trous
WO2003062589A1 (fr) * 2002-01-17 2003-07-31 Presssol Ltd. Systeme de forage dote de deux trains de forage
US6892829B2 (en) 2002-01-17 2005-05-17 Presssol Ltd. Two string drilling system
CN100338331C (zh) * 2002-01-17 2007-09-19 普雷斯索有限公司 用同心钻柱钻井眼的方法和装置
US6854534B2 (en) 2002-01-22 2005-02-15 James I. Livingstone Two string drilling system using coil tubing
US7090018B2 (en) 2002-07-19 2006-08-15 Presgsol Ltd. Reverse circulation clean out system for low pressure gas wells
US7204327B2 (en) 2002-08-21 2007-04-17 Presssol Ltd. Reverse circulation directional and horizontal drilling using concentric drill string
WO2004018827A1 (fr) * 2002-08-21 2004-03-04 Presssol Ltd. Forage directionnel et horizontal a circulation inverse utilisant un train de tiges de forage concentrique
US7066283B2 (en) 2002-08-21 2006-06-27 Presssol Ltd. Reverse circulation directional and horizontal drilling using concentric coil tubing
WO2005033467A1 (fr) * 2003-10-08 2005-04-14 Techmo Entwicklungs- Und Vertriebs Gmbh Procédé et dispositif permettant de creuser des trous dans des sols ou des roches
US7255181B2 (en) 2003-10-08 2007-08-14 “ALWAG” Tunnelausbau Gesellschaft m.b.H. Method and device for the drilling of holes in ground or rocky material
AT500691A1 (de) * 2003-10-08 2006-02-15 Techmo Entw & Vertriebs Gmbh Verfahren und vorrichtung zum bohren von löchern in boden- oder gesteinsmaterial
AT500691B1 (de) * 2003-10-08 2008-07-15 Alwag Tunnelausbau Gmbh Verfahren und vorrichtung zum bohren von löchern in boden- oder gesteinsmaterial
US7343983B2 (en) 2004-02-11 2008-03-18 Presssol Ltd. Method and apparatus for isolating and testing zones during reverse circulation drilling
US8408337B2 (en) 2004-02-12 2013-04-02 Presssol Ltd. Downhole blowout preventor
US10975664B2 (en) 2018-08-17 2021-04-13 Ancor-Loc (Nz) Limited Well or bore clearing tool

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