EP0512330B1 - Bohrmeissel - Google Patents

Bohrmeissel Download PDF

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Publication number
EP0512330B1
EP0512330B1 EP92106952A EP92106952A EP0512330B1 EP 0512330 B1 EP0512330 B1 EP 0512330B1 EP 92106952 A EP92106952 A EP 92106952A EP 92106952 A EP92106952 A EP 92106952A EP 0512330 B1 EP0512330 B1 EP 0512330B1
Authority
EP
European Patent Office
Prior art keywords
assembly
disposed
generating hydrodynamic
chamber
reflector
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.)
Expired - Lifetime
Application number
EP92106952A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0512330A1 (de
Inventor
Wsewolod Sergejewitsch Awdujewski
Rifner Wassilowitsch Ganijew
Robert Schakurowitsch Mufasalow
Jurij Petrowitsch Sacharow
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.)
Wave Tec GmbH
Original Assignee
Wave Tec 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
Application filed by Wave Tec GmbH filed Critical Wave Tec GmbH
Publication of EP0512330A1 publication Critical patent/EP0512330A1/de
Application granted granted Critical
Publication of EP0512330B1 publication Critical patent/EP0512330B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/18—Roller bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
    • 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
    • E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses

Definitions

  • the present invention relates to a rock-destroying drilling tool and in particular relates to a drill bit.
  • a drill bit which contains a hollow body with attached stones-destroying organs - rollers.
  • a replaceable cylinder is arranged in the body and is fixed with respect to the former by pins.
  • a chisel transition piece is connected to the body by means of a threaded connection, within which a slide sleeve of an assembly for generating hydrodynamic shafts with side channels and a central channel, in which wear-resistant attachments are mounted, is accommodated axially to the body.
  • the chisel transition piece has an inner ring shoulder, which serves as a support for a spring which surrounds the bush and cooperates with the flanged edge of the bush.
  • the valve sleeve is first flushed through the central channel.
  • a force acts on the flanged edge of the sleeve, which is caused by a pressure drop on the attachment, which is arranged in the central channel.
  • the spring is compressed until the side channels come to rest under the end face of the cylinder.
  • the side channels open and the fluid pressure in the sleeve drops so much that the spring brings the sleeve back up until these channels have been covered, and the cycle repeats.
  • the flushing liquid located in the space between it and the bit transition piece is expelled upward through overflow openings.
  • the frequency of the pendulum movements of the sleeve can be regulated by the pump power and the cross-sectional area of the hydromonitor attachments.
  • the invention is based on the design of a drill bit described in GB-A-2 224 094 according to the preamble of claim 1.
  • a swirl of the flushing medium is generated in a swirl chamber, which leaves the swirl chamber via the outlet channel so that the radii enlarge the vertebra with the distance from the outlet channel.
  • a negative pressure is generated in the center of the vortex, in which flushing medium flows against the direction of the vortex propagation.
  • the swirl chamber with the outlet channel has a mushroom shape in cross section. However, the performance of the drill bit or its service life in operation is still in need of improvement.
  • the invention is therefore based on the object of improving a drill bit of this type by making the design change as simple as possible to the extent that it is distinguished by a longer service life or greater output.
  • the swirl chamber is narrowed in the outlet channel, so that when the Channel diameter, the frequency of rotation of the liquid proportional to the ratio of the diameter of the swirl chamber and the outlet port decreases and accordingly the frequency of the wave radiation increases.
  • the design of the end face of the outlet channel with a radial rounding is due to the need to keep hydraulic losses when guiding the drilling fluid into the annulus lower, and also improves the quality of the vacuum in the zone near the borehole.
  • the choice of the shape of the swirl chamber in the shape of a sphere is due to a high amplitude of the waves generated by spherical emitters working in self-oscillation mode with a periodic hydraulic self-locking of the outlet channel.
  • the swirl chamber is provided with a conical wave reflector arranged in its upper part in the direction of its longitudinal axis, the angle of inclination of the generatrix of the conical surface of the reflector being below the critical value of the sliding angle of a wave incident on the conical surface. Equipping the swirl chamber with the tapered shaft reflector allows hydroacoustic and cavitation wear on the central part of the chamber head to be prevented and the service life of the drill bit to be increased.
  • the assembly for generating hydrodynamic waves is provided with a resonance chamber, the cavity of which is connected to the cavity of the swirl chamber and the volume of which is variable and in which a piston with a rod, with the possibility of displacement in the longitudinal direction, is accommodated .
  • the tuning to the resonance frequency takes place by moving the piston by means of a worm rod and by changing the volume of the resonance chamber under the piston.
  • the drill bit designed according to the invention ensures a high effectiveness of the borehole sinking. In addition, it enables shaft colmatation of the borehole wall when crossing geologically complex horizons (in fall-up, swallowing zones, in the event of water, oil, or natural gas leaks).
  • the application of the registered drill bit also makes it possible to significantly increase the mechanical drilling speed and the bit stand length.
  • the drill bit according to the invention contains a body 1 (FIG. 1) with attached rock-destroying organs - rollers 2.
  • a body 1 (FIG. 1) with attached rock-destroying organs - rollers 2.
  • an assembly for generating hydrodynamic waves is arranged, which represents a swirl chamber 3 with tangential inlet channels 4.
  • the vortex chamber 3 has a very conically tapering outlet channel 5.
  • the end face 6 of this channel 5 is radially rounded.
  • the swirl chamber 3 is provided with a conical wave reflector 7 (Fig. 1, 2).
  • the conical reflector 7 serves to prevent wear of the head of the swirl chamber 3 under the action of hydroacoustic and hydro shock, high-frequency and ultrasonic waves and occurs as a hydroacoustic wave concentrator.
  • the body 1 of the drill bit 1 can also serve as the body of the swirl chamber 3 (FIGS. 3, 4).
  • the swirl chamber 3 (FIG. 5) is designed in a spherical shape with tangential inlet channels 4 and a central outlet channel 5.
  • the swirl chamber 3 (FIG. 6) is equipped with a resonance chamber 8, in the interior of which a piston 9 with a rod 10 is accommodated. By screwing the rod 1 in and out, the volume of the chamber 8 under the piston 9 is changed.
  • the drill bit works as follows.
  • the drilling fluid is passed through a drill string 11 (FIG. 7) into the tangentially directed inlet channels 4. Furthermore, the drilling fluid flows through the tangential channels. 4 in the swirl chamber 3. In the swirl chamber 3, the drilling fluid is set in rotation and directed through the outlet channel 5 into the annular space.
  • the hydroacoustic waves generated by the assembly propagate mainly in two directions: inside the swirl chamber 3 and on the bottom of the borehole.
  • the inwardly directed hydroacoustic waves are received by the conical wave reflector 7, from the conical surface of which is totally reflected and scattered, without having a destructive effect on the head of the swirl chamber 3.
  • This increases the operational safety and duration of the chisel, while the hydroacoustic waves directed at the bottom of the borehole intensively destroy the central part of the bottom of the borehole and are superior in some rocks to tooth-shaped mechanical rock destruction.
  • the application of the registered drill bit allows the mechanical drilling speed and the length of the bit to be significantly increased compared to the prototypes and the best applicable bits.
  • the effectiveness is achieved by generating a high wave energy directed effect in the zone near the borehole.
  • the present chisel ensures wave colmatation of the borehole wall when passing through geologically complex horizons (in fall-up, swallowing zones, in the event of water, oil, natural gas leaks).
  • the invention can be used in well drilling using rock-destroying organs of the roller type.

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)
EP92106952A 1991-05-06 1992-04-23 Bohrmeissel Expired - Lifetime EP0512330B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SU4928471 1991-05-06
SU4928471 1991-05-06

Publications (2)

Publication Number Publication Date
EP0512330A1 EP0512330A1 (de) 1992-11-11
EP0512330B1 true EP0512330B1 (de) 1996-09-18

Family

ID=21570314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106952A Expired - Lifetime EP0512330B1 (de) 1991-05-06 1992-04-23 Bohrmeissel

Country Status (5)

Country Link
US (1) US5303784A (ja)
EP (1) EP0512330B1 (ja)
JP (1) JP2610749B2 (ja)
CA (1) CA2068005C (ja)
DE (1) DE59207153D1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277758B (en) * 1993-05-05 1996-07-24 Kt Bjuro Tekhn Sredstv Burenia A drill bit equipped with vortex nozzles,and a vortex nozzle for use in the drill bit
US6338390B1 (en) * 1999-01-12 2002-01-15 Baker Hughes Incorporated Method and apparatus for drilling a subterranean formation employing drill bit oscillation
US20020148606A1 (en) * 2001-03-01 2002-10-17 Shunfeng Zheng Method and apparatus to vibrate a downhole component by use of acoustic resonance
US7984772B1 (en) 2010-10-25 2011-07-26 Hall David R Downhole centrifugal drilling fluid separator
RU2555852C1 (ru) * 2014-06-11 2015-07-10 Виталий Анатольевич Ясашин Буровое шарошечное долото

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105560A (en) * 1960-01-04 1963-10-01 Maria N Zublin Weight controlled vibratory drilling device
US3416487A (en) * 1966-03-22 1968-12-17 Green Eng Co Method and apparatus for generating and applying sonic energy
US3441094A (en) * 1966-08-05 1969-04-29 Hughes Tool Co Drilling methods and apparatus employing out-of-phase pressure variations in a drilling fluid
US3415330A (en) * 1967-02-10 1968-12-10 Gen Dynamics Corp Hydroacoustic apparatus
US3532174A (en) * 1969-05-15 1970-10-06 Nick D Diamantides Vibratory drill apparatus
US3610347A (en) * 1969-06-02 1971-10-05 Nick D Diamantides Vibratory drill apparatus
US4512420A (en) * 1980-07-17 1985-04-23 Gill Industries, Inc. Downhole vortex generator
US4475603A (en) * 1982-09-27 1984-10-09 Petroleum Instrumentation & Technological Services Separator sub
US4687066A (en) * 1986-01-15 1987-08-18 Varel Manufacturing Company Rock bit circulation nozzle
GB2224054B (en) * 1988-09-29 1992-06-03 Shell Int Research Drill bit equipped with vortex nozzles and vortex nozzle for use in the bit

Also Published As

Publication number Publication date
JPH06257367A (ja) 1994-09-13
JP2610749B2 (ja) 1997-05-14
EP0512330A1 (de) 1992-11-11
CA2068005C (en) 1998-08-25
DE59207153D1 (de) 1996-10-24
CA2068005A1 (en) 1992-11-07
US5303784A (en) 1994-04-19

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