EP1448866A1 - Method and device for boring holes - Google Patents
Method and device for boring holesInfo
- Publication number
- EP1448866A1 EP1448866A1 EP02791587A EP02791587A EP1448866A1 EP 1448866 A1 EP1448866 A1 EP 1448866A1 EP 02791587 A EP02791587 A EP 02791587A EP 02791587 A EP02791587 A EP 02791587A EP 1448866 A1 EP1448866 A1 EP 1448866A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- borehole
- cladding tube
- drill bit
- drill
- cooling fluid
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000012809 cooling fluid Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000011435 rock Substances 0.000 claims abstract description 8
- 238000005253 cladding Methods 0.000 claims description 84
- 238000005553 drilling Methods 0.000 claims description 49
- 238000007789 sealing Methods 0.000 claims description 47
- 238000011010 flushing procedure Methods 0.000 claims description 34
- 238000009527 percussion Methods 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000005065 mining Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 3
- 239000012530 fluid Substances 0.000 description 8
- 238000004873 anchoring Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000272517 Anseriformes Species 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- -1 if necessary Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
Definitions
- the present invention relates to a method for drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material, a drill hole being formed by a striking and / or rotating movement by means of a drill bit mounted on a drill pipe and a jacket or
- the cladding tube is introduced into the borehole, material being mined via at least one feed opening and / or flushing or cooling fluid introduced into the area of the drill bit through the drill string into an annular space defined between the outer circumference of the drill string and the inner circumference of the cladding tube and out is brought down the borehole.
- the invention further relates to a device for drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material, a drill bit mounted on a drill pipe forming a drill hole by a striking and / or rotating movement and a jacket surrounding the drill pipe.
- or cladding tube can be introduced into the borehole, wherein in particular through the interior of the drill pipe a flushing or cooling fluid can be introduced into the area of the excavation area of the drill bit and degraded material and / or the flushing or cooling fluid via at least one feed opening into an annular space between the drill pipe and the cladding tube can be brought in and brought out of the borehole.
- a disadvantage of these known embodiments is, in particular, the fact that when water enters when the borehole is carried out, the water possibly entering the borehole under high pressure, this entering water together with the removed material and the flushing or cooling fluid introduced in particular through the annular space between the drill pipe and the cladding tube as well as along the outer circumference of the cladding tube from the borehole and thus can pose a hazard to the operating personnel, whereby due to a prevailing high pressure, the entire drilling device may also move out of the borehole counter to the drilling direction can be applied.
- the present invention aims to develop a method and a device of the type mentioned in such a way that when water enters, possibly under high pressure, into the borehole and in particular in the area of the drill bit, a seal can be ensured such that the outlet of water is prevented, in particular via the transport cross-sections for dismantled material and flushing or cooling fluid available during the normal drilling process, and secure anchoring of the drilling device or at least of the casing or cladding tube is achieved.
- the method of the type mentioned is essentially characterized in that the supply of Flushing or cooling fluid in the drill bit is interrupted, that the feed opening for introducing degraded material and / or flushing or cooling fluid into the annular space between the drill pipe and the cladding tube is interrupted, in particular is sealed in a fluid-tight manner, and that the jacket or Cladding tube is fixed at its end protruding from the borehole on the borehole wall and is sealed fluid-tight against this.
- both the supply of flushing or cooling fluid in the drill bit is interrupted and the access or supply opening in the annular space between the drill pipe and the cladding tube is interrupted or sealed in a fluid-tight manner, it is ensured that upon entry of water into the borehole, in particular in the area of the drill bit, this water, which may be under high pressure, not against the feed direction for the flushing or cooling fluid as well as in the direction of removal for the mined material and the introduced flushing or cooling fluid from the borehole is carried out, so that a corresponding risk to the operating personnel and damage to the outside of the
- the jacket or cladding tube is fixed at its end protruding from the borehole with respect to the borehole wall and is sealed in a fluid-tight manner, so that water also exits via the one located between the outer circumference of the cladding tube and the borehole inner wall Free space is safely avoided. It is therefore provided according to the invention that in the area of the drill bit a reliable sealing of the annular space between the drill pipe and the cladding tube, which is used during the drilling process for the removal of the mined material, can be achieved and at the same time water escapes over the outer circumference of the envelope rohrs is also prevented. It also ensures that not against the supply pressure for the rinsing or. Cooling fluid, if necessary, water is brought out of the borehole via the feed line in the drill pipe and introduced into corresponding feed devices outside the borehole.
- the feed opening provided in the cladding tube for introducing material into the annular space between the drill pipe and the cladding tube by moving the drill bit against the drilling direction via at least one end provided on the end facing away from the surface of the drill bit Sealing element is sealed.
- Such a displacement of the drill bit against the direction of drilling can be carried out as a precaution when the desired drill hole length has been achieved, in order to be able to reliably avoid any subsequent entry and exit of water into the drill hole. If material or rock layers, in which water is contained, in particular under high pressure, are penetrated during the drilling of the borehole, the drill bit is displaced counter to the drilling direction counter to the introduction of force, so that a corresponding sealing of the Inlet opening into the interior or
- Annulus between the drill pipe and the cladding tube can be achieved. Due to the interruption of the supply of flushing or cooling fluid through the drill pipe, as well as the anchoring and sealing of the cladding tube on its outer circumference to that from the
- the end of the borehole projecting is thus automatically or automatically sealed when the water enters under a corresponding pressure.
- the cladding tube is secured, in particular wedged or jammed, in the region of the seal at the end protruding from the borehole to prevent removal against the drilling direction from the borehole. If high fluid pressures occur, there may be high forces with a corresponding cross-sectional area of the drill bit, which become effective in the sense of the drilling elements emerging from the borehole, so that in addition to the fixing and sealing of the end of the cladding tube projecting from the borehole, additional securing is provided, is proposed in particular by wedging or jamming the respective cladding tube end.
- the drill pipe is separated from the drill bit in a manner known per se after completion of the drilling and is brought out of the cladding tube becomes. In this way, the drill pipe can essentially be reused over the entire length, while the drill bit together with the cladding tube provides the sealing of the borehole against the escape of water from the borehole.
- the borehole in particular the jacket or cladding tube is filled with a hardening material.
- a device of the type mentioned at the outset is essentially characterized in that at least one in the feed line for the flushing or cooling fluid into the drill bit and in the region of the at least one feed opening into the annular space between the drill pipe and the cladding tube Sealing element is provided and that the cladding tube is fixed at the end protruding from the borehole on the surrounding soil or rock material via a fixing and / or sealing device and is sealed in a fluid-tight manner.
- both the supply line for supplying the flushing or cooling fluid into the drill bit and the supply opening for the removal of degraded material and introduced flushing or cooling fluid are appropriately interrupted and sealed to prevent any leakage from occurring prevent high pressure water entering through the drill bit as well as the transport cross-section made available during the drilling process.
- a corresponding fixing and / or sealing device is provided for fixing and sealing the end of the cladding tube protruding from the borehole.
- a counter to the feed direction of the flushing or cooling fluid closing check valve is provided in the supply line for the flushing or cooling fluid to the drill bit.
- a check valve can be arranged simply and inexpensively, especially in the area of the drill bit immediately before the flushing fluid emerges from the corresponding passage openings in the area of the drill bit and results in the event that water entering the area of the area has a higher pressure than the supply pressure of the Should have flushing fluids, an automatic interruption and sealing of the supply line for the flushing fluid.
- the at least one sealing element is provided from the end of the drill bit facing away from the drilling surface, which seals the feed opening formed in the cladding tube into the annular space between the drill pipe and the cladding tube after completion of the borehole, in particular by moving the drill bit counter to the drilling direction.
- Such a sealing element can accordingly be provided at the end of the drill bit facing away from the removal surface of the drill bit, whereby, as already explained above, by pulling the drill bit back into the cladding tube when the drilling is completed or, if appropriate, moving the drill bit through onto the removal surface acting water pressure against the driving forces immediately and automatically the at least one supply opening in the annular space between the drill pipe and the cladding tube is interrupted and sealed, so that an escape of water, in particular which is reliably prevented under high pressure via this annular space to the outside.
- the sealing element is formed on an extension of the drill bit which is adapted to the internal dimensions of the cladding tube and is formed with additional sealing elements, in particular sealing rings.
- Such an extension serves as a guide for centering the drill bit in the cladding tube during the drilling process and can be accommodated with a precise fit in a possibly reinforced front section of the cladding tube, in order to ensure reliable after pulling back or pushing back the drill bit against the drilling direction in the cladding tube To seal the feed opening in the annular space between the drill pipe and the cladding tube.
- the sealing effect can be supported in addition to a precisely fitting arrangement of the drill bit or the extension of the drill bit in the cladding tube by additional provision of sealing elements, in particular sealing rings, which are in particular arranged such that in the closed position the additional sealing elements correspond to the positioning or design of the at least an access opening are arranged.
- Such a securing or clamping element allows an essentially unimpeded insertion of the cladding tube during the drilling process, while an additional clamping force and thus a supporting force for determining the force are exerted when the cladding tube is acted upon or exerted in the sense of expelling the cladding tube from the borehole against the drilling direction Cladding tube is provided.
- the securing or clamping element is formed by a ring element surrounding the cladding tube, which has a conically tapering surface on its outer surface and a complementary, conically conical surface the tapering inner surface of the fixing element interacts when the cladding tube moves counter to the drilling direction and prevents a movement of the cladding tube counter to the drilling direction, as corresponds to a further preferred embodiment of the device according to the invention.
- the drill string can be detached from the drill bit in a manner known per se and removed from the borehole.
- the device according to the invention in a state in which a sealing of the drilling device reliably prevents fluid from escaping from the drilling device under high pressure.
- a drill hole 3 is made through a drill bit 1, which is mounted on a drill pipe 2, the drill bit 1 having, for example, corresponding hard material or hard metal inserts 5 on its mining surface 4.
- a flushing or cooling fluid is introduced into the area of the excavation surface 4 of the drill bit 1 via the drill pipe 2 via a schematically indicated supply line 6, an outlet opening 7 being indicated in FIGS. 1 and 2.
- a check valve 8 is arranged in the feed line 6 in the area of the drill bit 1, which is contrary to that indicated by 9
- Feed direction for the flushing or cooling fluid closes.
- the drill pipe 2 is surrounded by a cladding tube 10, the removed material and introduced flushing or cooling fluid being introduced into the annular space 13 between the outer circumference of the drill rod 2 and the inner circumference of the cladding tube 10 via passage or supply openings 12 and is brought out of the borehole 3 in such a manner as is shown in FIG. 1, which shows the drilling state.
- the cladding tube 10 is at its end portion 14 protruding from the borehole 3 via a fixing device 15 on the material 16 surrounding borehole 3 is secured, a sealing element 17 being additionally indicated.
- the end region 14 of the cladding tube 10 protruding from the borehole 3 is surrounded by a securing element or securing wedge 18, this securing wedge 18 having an outer surface 19 tapering towards the end of the cladding tube 10, which together with a correspondingly tapering inner contour 20 of the fixing element 15 - Works, so that the drilling process, which also takes place according to arrow 9, can be carried out unhindered and also the cladding tube 10 can be introduced into the borehole 3 according to the drilling progress, for example by pulling the drill rod 2 into the borehole 3, during a movement of the cladding tube 10 against the drilling direction and thus in the sense of bringing it out of the borehole 3, both via the fixing and sealing device 15 or 17 and the additional securing device 18 is prevented.
- FIG. 2 shows the state in which the drill bit 1 has either been withdrawn into the interior of the cladding tube 10 counter to the direction of drilling 9 or the drill bit 1 has entered the interior of the borehole 3, for example, through the entry of fluid, in particular water, according to arrow 21 was shifted against the drilling direction in the cladding tube 10.
- the check valve 8 in the feed line 6 for the flushing or cooling fluid closes when water under high pressure enters the space 22 located in front of the surface of the drill bit 1.
- the supply openings 12 in the annular space 13 between the drill pipe 2 and the cladding tube 10 are closed by a sealing element 23, which is formed on an extension 24 at the end facing away from the dismantling surface 4 of the drill bit 1, the sealing element 23 not is guided in the inside of the cladding tube 10 with a corresponding fit, but has additional sealing elements 25, in particular sealing rings, to further support the sealing effect.
- the sealing element 23 thus reliably prevents the entry of material and possibly water under high pressure into the interior of the annular space 13.
- the fixing device 15 and the securing device 18 reliably ensure that even at high pressures, which for example can reach a few tens of bar, taking into account a corresponding cross-sectional area of the drill bit 1 and the weight of the drilling elements, which may have a large length leakage of Bohrvorlegisele ducks from the borehole 3 together with the fluid under high pressure can be avoided. This can endanger the operating personnel as well as possible damage to the
- the drill pipe 2 can be separated from the drill bit or the extension 24 with the sealing element and reused for a new drilling process.
- the interior 13 of the cladding tube 10 is subsequently filled with a hardening material.
Landscapes
- 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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT02791587T ATE307265T1 (en) | 2001-11-30 | 2002-11-26 | METHOD AND APPARATUS FOR DRILLING HOLES |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT18752001 | 2001-11-30 | ||
AT18752001A AT411383B (en) | 2001-11-30 | 2001-11-30 | METHOD AND DEVICE FOR DRILLING HOLES |
PCT/AT2002/000330 WO2003046330A1 (en) | 2001-11-30 | 2002-11-26 | Method and device for boring holes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1448866A1 true EP1448866A1 (en) | 2004-08-25 |
EP1448866B1 EP1448866B1 (en) | 2005-10-19 |
Family
ID=3689195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02791587A Expired - Lifetime EP1448866B1 (en) | 2001-11-30 | 2002-11-26 | Method and device for boring holes |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1448866B1 (en) |
AT (1) | AT411383B (en) |
AU (1) | AU2002357954A1 (en) |
DE (1) | DE50204631D1 (en) |
TW (1) | TW200303955A (en) |
WO (1) | WO2003046330A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT412802B (en) * | 2003-10-01 | 2005-07-25 | Techmo Entw & Vertriebs Gmbh | METHOD AND DEVICE FOR DRILLING HOLES IN SOIL OR ROCK MATERIAL |
NO337771B1 (en) * | 2015-03-18 | 2016-06-20 | Resonator As | Percussive hammering assembly |
CN109098662B (en) * | 2018-08-25 | 2020-02-21 | 西南石油大学 | Drilling and completion pipeline blanking device |
CN111188575B (en) * | 2020-01-15 | 2021-06-04 | 大庆明悦石油科技有限公司 | Rotary steering drilling device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3905106C2 (en) * | 1989-02-20 | 1994-08-11 | Fritz Zimmermann Masch U Appar | Deep hole hammer drill with water rinsing device |
DE19831009C2 (en) * | 1998-07-10 | 2000-05-18 | Btd Bohrtechnik Gmbh | Drilling device |
KR100609938B1 (en) * | 1998-08-21 | 2006-08-04 | 테크모 엔트비클룽스-운트 페어트립스 게엠베하 | Device for drilling or draining holes in soil or rock |
AU2910899A (en) * | 1999-03-18 | 2000-10-09 | Alwag Tunnelausbau Gesellschaft Mbh | Device for drilling bore holes |
-
2001
- 2001-11-30 AT AT18752001A patent/AT411383B/en not_active IP Right Cessation
-
2002
- 2002-11-26 EP EP02791587A patent/EP1448866B1/en not_active Expired - Lifetime
- 2002-11-26 DE DE50204631T patent/DE50204631D1/en not_active Expired - Lifetime
- 2002-11-26 AU AU2002357954A patent/AU2002357954A1/en not_active Abandoned
- 2002-11-26 WO PCT/AT2002/000330 patent/WO2003046330A1/en not_active Application Discontinuation
- 2002-11-27 TW TW91134409A patent/TW200303955A/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO03046330A1 * |
Also Published As
Publication number | Publication date |
---|---|
TW200303955A (en) | 2003-09-16 |
WO2003046330A1 (en) | 2003-06-05 |
AT411383B (en) | 2003-12-29 |
ATA18752001A (en) | 2003-05-15 |
EP1448866B1 (en) | 2005-10-19 |
DE50204631D1 (en) | 2006-03-02 |
AU2002357954A1 (en) | 2003-06-10 |
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