EP0358786A1 - Dispositif de forage superposé - Google Patents

Dispositif de forage superposé Download PDF

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Publication number
EP0358786A1
EP0358786A1 EP88114901A EP88114901A EP0358786A1 EP 0358786 A1 EP0358786 A1 EP 0358786A1 EP 88114901 A EP88114901 A EP 88114901A EP 88114901 A EP88114901 A EP 88114901A EP 0358786 A1 EP0358786 A1 EP 0358786A1
Authority
EP
European Patent Office
Prior art keywords
strand
drill bit
outer strand
crown part
drilling device
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.)
Withdrawn
Application number
EP88114901A
Other languages
German (de)
English (en)
Inventor
G. Dr. Ing. Klemm
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.)
Ing G Klemm Bohrtechnik GmbH
Original Assignee
Ing G Klemm Bohrtechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE3728269A priority Critical patent/DE3728269C1/de
Application filed by Ing G Klemm Bohrtechnik GmbH filed Critical Ing G Klemm Bohrtechnik GmbH
Priority to EP88114901A priority patent/EP0358786A1/fr
Publication of EP0358786A1 publication Critical patent/EP0358786A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/265—Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the hole
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B10/66—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable
    • 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

Definitions

  • the invention relates to an overlay drilling device of the type specified in the preamble of claim 1.
  • Overlay drilling is drilling in the ground with two pipe strands, namely an outer strand and a coaxial inner strand.
  • the inner string carries a drill bit at the front end to perform drilling, while the outer string is primarily used to support the wall of the borehole.
  • eccentric drill bits are known which have a main crown part and an auxiliary crown part which can be swung out relative to it about an eccentric axis. If the auxiliary crown part is in the swung-out state, it protrudes beyond the contour of the outer strand.
  • the impact transmission can either take place at the rear end of the outer strand if the outer strand is abruptly coupled to the inner strand at this point, or in the vicinity of the eccentric drill bit if the drill bit shaft has a stop surface which interacts with a counter-stop surface of the outer pipe strand.
  • the outer strand is subjected to intermittent considerable compression or expansion stresses. The consequence of this is that the pipes of the outer strand cannot be screwed to one another in the manner customary for earth drilling, but must be welded. This welded connection must be cut again when the outer strand is pulled out of the borehole.
  • a disadvantage of the ODEX process is that it is manufactured the outer strand of tubes welded together is very complex.
  • the invention has for its object to provide an overlay drilling device of the type specified in the preamble of claim 1, which is able to effect a fast drilling without any risk of rinsing in any type of soil.
  • the overlay drilling device according to the invention works in principle according to the ODEX method, but the outer strand is not driven by blows, but only by turning and by a constantly applied feed force.
  • the overlay drilling device enables different operating modes: since the outer strand has a ring drill bit, drilling is possible in such a way that the ring drill bit and the main crown part of the eccentric drill bit are arranged in the same way, that is to say that the auxiliary crown part is in the retracted state inside the outer strand and that the cutting elements of the ring core bit and the main crown part of the eccentric bit lie approximately in one plane.
  • Another method of operation is to pull the eccentric drill bit into the outer strand and to operate the drilling device with an annular drill bit which is ahead of the eccentric drill bit.
  • a third mode of operation is to advance the eccentric drill bit relative to the ring drill bit in order to break up rock with the eccentric drill bit. The ring core bit then runs after the eccentric core bit and partially causes the loosened rock to be ground.
  • the outer strand is driven exclusively in rotation saves energy because impact energy is not required for the outer strand.
  • the outer strand acts as sound insulation for the Inner strand.
  • Another advantage is that the outer strand is subject to only slight mechanical stress and can therefore be assembled from tubes screwed together.
  • no vibrations are transmitted to the ground by the outer strand, so that ground vibrations and soil compaction are avoided.
  • the directional accuracy of drilling is increased because the rotating outer strand forms a safe guide for the eccentric drill bit. At no point is the inside diameter of the ring core bit smaller than the inside diameter of the outer strand.
  • the eccentric core bit with its auxiliary crown part in the retracted state can completely seal the passage through the ring core bit or through the outer strand.
  • the circumferential part of the auxiliary crown has no backwashing grooves or similar channels. Therefore, when the eccentric drill bit is retracted, it is possible to seal the interior of the outer strand against pressing water, so that the risk of subsidence is avoided.
  • a tubular outer strand 10 is provided, which consists of numerous interconnected drill pipes.
  • a coaxial inner strand 11 runs in the outer strand and likewise consists of numerous drill pipes screwed together.
  • Liquid flushing medium is pumped through the inner strand 11 to the bottom of the borehole and in the annular space between the inner strand and the outer strand the flushing medium flows back together with the drilled drillings.
  • a rotary drive 12 is connected, which consists of a hydraulic rotary motor.
  • an ejection rinsing head 13 is connected in a rotationally fixed manner, through the ejection nozzle 14 of which backwashed flushing medium with drilling material is ejected.
  • the inner strand 11 is passed through the ejection flushing head 13 and its rear end region extends through a rotationally fixed flushing head 16 which has a connection opening 17 for the supply of the flushing medium.
  • the insertion end 18 is fixed, which is rotated by a rotary motor 19.
  • 20 strikes are exerted on the rear end of the insertion end 18 by a hydraulic impact drive (hammer drill).
  • the motor 19 and the hydraulic impact drive 20 together form a rotary impact hammer which rotates and strikes the inner strand 11.
  • the outer strand 10 is only rotated by the rotary motor 12 and it is suddenly decoupled from the inner strand.
  • the motor 12 and the rotary hammer 19, 20 are arranged together on a carriage 21, which can be moved linearly on a carriage 15.
  • a feed device (not shown) acts on the carriage 21, which pushes the carriage towards the borehole and ensures the necessary contact pressure of the drill bits against the bottom of the borehole.
  • the rotary drive 12 is fixedly mounted on the carriage 21.
  • the carriage 21 also carries a hydraulic linear motor 22, for example a piston-cylinder unit, one end 23 of which is fixed to the carriage 21 and the other end 24 of which engages a carriage 25 which comprises the motor 19 and the hydraulic hammer mechanism 20 Rotary hammer carries.
  • the carriage 25 is on rails 26 of the Wagens 21 movable and is moved back and forth by the linear motor 22 to axially shift the inner strand 11 relative to the outer strand 10.
  • the inner strand 11 has spacers 27 which center it in the outer strand 10.
  • the eccentric drill bit 28 is attached to the front end of the inner strand 11.
  • This has a shaft 28a, the outer diameter of which corresponds to the inner diameter of the outer strand 10 and which is thus guided axially displaceably in the outer strand.
  • the longitudinal backwashing grooves 29 extend on the outside of the shaft 28a.
  • the auxiliary crown part 28b is pivotably attached to the front end of the shaft 28a.
  • the central axis 30 of the auxiliary crown part 28b is laterally offset in relation to the axis of the shaft 28a in the pivoted-out state, so that the auxiliary crown part 28b can assume two different positions: in the pivoted-in state according to FIGS. 2 and 3, the peripheral surface of the auxiliary crown part 28b extends coaxially to the shaft 28a and in the pivoted-out state according to FIG. 4, the auxiliary crown part 28b projects to one side over the shaft 28a, so that the auxiliary crown part creates a hole whose diameter is so large that this hole can also accommodate the outer strand 10.
  • Chisel elements 31 are attached to the protruding part of the front end face of the auxiliary crown part 28b.
  • the main crown part 28c lying in front of the auxiliary crown part 28b is firmly connected to the shaft 28a.
  • the main crown part 28c is arranged eccentrically to the axis of the shaft 28a, the eccentric offset lying in the same direction as that of the auxiliary crown part 28b in the extended state according to FIG. 4.
  • the auxiliary crown part 28b can be pivoted through 180 ° about the axis of the shaft 28a, the chisel elements 31 lie when the auxiliary crown part is pivoted in according to FIGS. 2 and 3 behind the point which is not covered by the main crown part 28c, so that the end face of the main crown part 28c occupied by chisel elements 32 and the area of the auxiliary crown part 28b occupied by chisel elements 31 together fill the entire cross-sectional area of the outer strand 10.
  • the auxiliary crown part 28b has a peripheral section 33 which completely fills the inner cross section of the outer strand 10.
  • the ring drill bit 34 is fastened to the front end of the outer strand 10.
  • This ring drill bit 34 has a through hole, the diameter of which is equal to that of the outer strand 10, so that no inner step section is formed during the transition from the outer strand to the ring drill bit.
  • cutting elements 31 are fastened, which exert a cutting action when the ring bit is rotated.
  • These chisel elements can be sawtooth-shaped. They can also have the cross section of an isosceles triangle so that they cut in both directions of rotation.
  • Fig. 2 shows the position of the drill bit 28 when drilling in medium-heavy soils.
  • the eccentric drill bit 28 is enclosed by the ring drill bit 34 and the front faces of the main crown part 28c of the eccentric drill bit and the ring drill bit 34 are approximately the same.
  • the ring drill bit 34 is only rotated. Both drill bits can either be in the same Direction of rotation or driven in opposite directions.
  • the diameter of the borehole produced is slightly larger than the outer diameter of the outer strand 10 because the ring drill bit 34 protrudes slightly radially.
  • Fig. 3 shows drilling in soils with pressurized water.
  • the eccentric drill bit 28 is pulled back into the outer strand 10, so that the front side equipped with the chisel elements 32 lies behind the front side of the ring drill bit 34.
  • the annular surface 33 seals the outer strand so that pressurized water cannot penetrate the outer strand.
  • Fig. 4 shows the state that the borehole must be driven through a stone 36 located in the ground.
  • the eccentric drill bit 28 is extended from the ring drill bit 34.
  • the auxiliary drill bit part 28b protrudes laterally, abutting against a stop of the main drill bit part 28c to limit the rotational movement.
  • the chisel elements 31 and 32 penetrate into the rock 36 as a result of the combined striking and rotating movement and shatter it.
  • the ring core bit 34 then penetrates into the enlarged borehole. Flushing holes 37 push the flushing medium out of the inner strand 11 through the shaft 28a and the drill bit parts 28b and 28c to the bottom of the borehole.
  • the flushing medium flows back together with the loosened drilling material through the backwashing grooves 29.
  • the ring drill bit 34 Flushing back along the borehole wall is prevented by the ring drill bit 34. Should there be pushing water around the rock 36 what? is indicated by the arrows 39, the ring drill bit 34 forms together with the borehole wall a barrier 40, through which it is prevented that the water can flow into the area of the eccentric drill bit.
  • the relative position of the outer strand 10 and inner strand 11 and the drilling feed takes place by moving the carriage 21 in the direction of the bottom of the borehole.
  • the respective operating mode is selected depending on the soil conditions at the bottom of the borehole.
  • FIG. 5 shows an embodiment in which only one rotary drive 12 for the outer strand 10 and one rotary drive 19 for the inner strand 11 are arranged on the carriage 21.
  • the blows which are exerted on the eccentric drill bit 28 are generated by a deep hole hammer 40 which is arranged in the course of the inner strand 11 directly behind the shaft 28a.
  • the blows of the deep hole hammer 40 are not transmitted to the outer strand 10 here either.
  • FIG. 5 the various operating modes, which are shown in FIGS. 2 to 4 are shown.

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)
EP88114901A 1987-08-25 1988-09-13 Dispositif de forage superposé Withdrawn EP0358786A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE3728269A DE3728269C1 (en) 1987-08-25 1987-08-25 Overburden drilling device
EP88114901A EP0358786A1 (fr) 1988-09-13 1988-09-13 Dispositif de forage superposé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88114901A EP0358786A1 (fr) 1988-09-13 1988-09-13 Dispositif de forage superposé

Publications (1)

Publication Number Publication Date
EP0358786A1 true EP0358786A1 (fr) 1990-03-21

Family

ID=8199299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114901A Withdrawn EP0358786A1 (fr) 1987-08-25 1988-09-13 Dispositif de forage superposé

Country Status (1)

Country Link
EP (1) EP0358786A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543140A2 (fr) * 1991-11-21 1993-05-26 Gu Tiefbau Ag Dispositif de forage pour le génie civil et procédé pour la création de colonnes de stabilisation ou de structures analogues dans le sol
WO2003025327A1 (fr) * 2001-09-20 2003-03-27 Shell Internationale Research Maatschappij B.V. Tete de forage a percussion
WO2005031108A1 (fr) * 2003-10-01 2005-04-07 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage de trous dans de la terre ou de la pierre
US7182156B2 (en) 2003-06-12 2007-02-27 Luc Charland System for overburden drilling
WO2007134478A1 (fr) * 2006-05-24 2007-11-29 Btd Bohrtechnik Ag 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
CN112809939A (zh) * 2020-12-08 2021-05-18 尹建军 一种建筑工程用的防卡水钻
CN115596354A (zh) * 2022-12-13 2023-01-13 甘肃水利机械化工程有限责任公司（Cn） 一种旋喷式河道钻孔装置
WO2024094789A1 (fr) * 2022-11-03 2024-05-10 Hammerdrum Ag Système de forage et procédé d'actionnement d'un système de forage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848683A (en) * 1972-02-10 1974-11-19 Atlas Copco Ab Method and means for drilling
EP0004674A2 (fr) * 1978-04-06 1979-10-17 Ferdinand Panzer Gesellschaft m.b.h. Trépan pour l'exécution de forages dans le sol et la roche
DE2924393A1 (de) * 1979-06-16 1980-12-18 Brueckner Grundbau Gmbh Bohrvorrichtung zum ueberlagerungsbohren
DE3024102A1 (de) * 1980-06-27 1982-01-21 Klemm Bohrtech Exzenter-bohrvorrichtung
EP0190669A2 (fr) * 1985-02-06 1986-08-13 Ing. G. Klemm Bohrtechnik GmbH Dispositif de forage
EP0235105A2 (fr) * 1986-02-24 1987-09-02 Santrade Ltd. Outil de forage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848683A (en) * 1972-02-10 1974-11-19 Atlas Copco Ab Method and means for drilling
EP0004674A2 (fr) * 1978-04-06 1979-10-17 Ferdinand Panzer Gesellschaft m.b.h. Trépan pour l'exécution de forages dans le sol et la roche
DE2924393A1 (de) * 1979-06-16 1980-12-18 Brueckner Grundbau Gmbh Bohrvorrichtung zum ueberlagerungsbohren
DE3024102A1 (de) * 1980-06-27 1982-01-21 Klemm Bohrtech Exzenter-bohrvorrichtung
EP0190669A2 (fr) * 1985-02-06 1986-08-13 Ing. G. Klemm Bohrtechnik GmbH Dispositif de forage
EP0235105A2 (fr) * 1986-02-24 1987-09-02 Santrade Ltd. Outil de forage

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543140A2 (fr) * 1991-11-21 1993-05-26 Gu Tiefbau Ag Dispositif de forage pour le génie civil et procédé pour la création de colonnes de stabilisation ou de structures analogues dans le sol
EP0543140A3 (en) * 1991-11-21 1993-08-11 Gu Tiefbau Ag Drilling device for civil engineering and method for making stabilizing columns or similar structures in the ground
US7104344B2 (en) 2001-09-20 2006-09-12 Shell Oil Company Percussion drilling head
GB2396878A (en) * 2001-09-20 2004-07-07 Shell Int Research Percussion drilling head
GB2396878B (en) * 2001-09-20 2005-10-19 Shell Int Research Percussion drilling head
WO2003025327A1 (fr) * 2001-09-20 2003-03-27 Shell Internationale Research Maatschappij B.V. Tete de forage a percussion
CN1318723C (zh) * 2001-09-20 2007-05-30 国际壳牌研究有限公司 用于钻入地质岩层内的装置和方法
US7182156B2 (en) 2003-06-12 2007-02-27 Luc Charland System for overburden drilling
WO2005031108A1 (fr) * 2003-10-01 2005-04-07 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage de trous dans de la terre ou de la pierre
US7195081B2 (en) 2003-10-01 2007-03-27 Alwag Tunnelausbau Gesellschaft M.B.H. Method and device for boring holes in soil or rock
WO2007134478A1 (fr) * 2006-05-24 2007-11-29 Btd Bohrtechnik Ag 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
CN112809939A (zh) * 2020-12-08 2021-05-18 尹建军 一种建筑工程用的防卡水钻
WO2024094789A1 (fr) * 2022-11-03 2024-05-10 Hammerdrum Ag Système de forage et procédé d'actionnement d'un système de forage
CN115596354A (zh) * 2022-12-13 2023-01-13 甘肃水利机械化工程有限责任公司（Cn） 一种旋喷式河道钻孔装置

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