EP0512329A2 - Trépan carottier avec destruction hydrodynamic du noyau - Google Patents

Trépan carottier avec destruction hydrodynamic du noyau Download PDF

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Publication number
EP0512329A2
EP0512329A2 EP92106929A EP92106929A EP0512329A2 EP 0512329 A2 EP0512329 A2 EP 0512329A2 EP 92106929 A EP92106929 A EP 92106929A EP 92106929 A EP92106929 A EP 92106929A EP 0512329 A2 EP0512329 A2 EP 0512329A2
Authority
EP
European Patent Office
Prior art keywords
matrix
cutting
swirl chamber
drill bit
channels
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
Application number
EP92106929A
Other languages
German (de)
English (en)
Other versions
EP0512329B1 (fr
EP0512329A3 (en
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 EP0512329A2 publication Critical patent/EP0512329A2/fr
Publication of EP0512329A3 publication Critical patent/EP0512329A3/de
Application granted granted Critical
Publication of EP0512329B1 publication Critical patent/EP0512329B1/fr
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
    • E21B10/02—Core bits
    • E21B10/06—Roller core bits
    • 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
    • E21B10/02—Core bits
    • E21B10/04—Core bits with core destroying means
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit
    • 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 cutting and shearing type drill bit.
  • a drill bit (NI Andrianov, ES Bubnov ea "Almaznoe burenie" (diamond drilling), 1961, publisher “Gostoptekhizdat”, (Moscow), p. 158, Fig. 54) which has a body with channels for the supply of a drilling fluid and contains rock-destroying organs of the cutting and shear type.
  • the stone-destroying organs are attached to the lower part of the body - a matrix.
  • the conical cavity of the matrix and the radial grooves communicate with the channels for the supply of the drilling fluid.
  • Wear-resistant teeth of the cutting and shear type are attached to the surface of the matrix that is in contact with the bottom of the borehole.
  • the invention has for its object to provide a drill bit of the cutting and shearing type with such a structural design of the body, including its matrix and the system of flushing channels, which generate and utilize a high wave energy directed effect generated by a turbulent flow of the drilling fluid hydrodynamic Waves with a wide frequency spectrum in the borehole near zone and the generation of a negative pressure in this guaranteed.
  • the body with a Vortex chamber is provided with inlet channels arranged tangentially in the upper part and a central outlet channel and outlet channels arranged tangentially in the lower part of the body, the part of the matrix closest to the body being designed in the form of a hollow truncated cone with the top surface of the body facing and with a changing steepness of the generatrix of the conical surface and with the base and the top surface, which are shaped according to the Archimedean spiral, with continuous radial grooves are made on the side surface of the matrix, with the outlet channels of the body s are connected by a cavity executed in this.
  • the equipment of the chisel body with the swirl chamber with the tangentially directed inlet channels is due to the need to generate hydroacoustic waves to activate the process of rock destruction.
  • the vortex chambers represent powerful hydrodynamic wave emitters with a wide frequency spectrum.
  • the vortex chambers in the zone near the borehole create a vacuum, which promotes the process of destruction and cleaning of the bottom of the borehole from the mud.
  • the central outlet channel and the radial grooves serve to transmit the wave energy to the surface of the borehole bottom and to flush this surface in an aligned manner.
  • the concave conical surface of part of the matrix contributes to a reduction in the energy intensity of the destruction of the central part of the bottom of the borehole.
  • a protruding part of the bottom of the borehole remains in the form of a regular cone in the central part.
  • the changing steepness of the conical surface of the matrix acts on the protruding part of the bottom of the borehole during rotation of the bit, an additional alternating bending force, which leads to volumetric destruction.
  • the central part of the borehole bottom is intensively destroyed by the wave energy.
  • the execution of the base and the top surface of the truncated cone according to the Archimedean spiral gives the possibility to change the steepness of the generators of the cone surface.
  • the swirl chamber prefferably be spherical.
  • the choice of the shape of the vortex chamber in spherical shape is due to a higher amplitude of the waves generated by the spherical emitters working in self-oscillation mode with a periodic hydraulic self-locking of the outlet channel.
  • the swirl chamber is provided with a tapered wave reflector arranged in its upper part in the direction of its longitudinal axis, the tapering of the tapered wave reflector of the relationship 0 ⁇ ⁇ 20 ' follows wherein ⁇ the taper of the wave reflector; 0 'is the critical sliding angle of a wave incident on the wave reflector is.
  • the choice of the taper of the tapered wave reflector not above the double value of the critical slip angle 20 'of the incident wave, ie 0 ⁇ ⁇ 20', is due to the fact that the interface of the two media (drilling fluid and metal) with different densities and compressivities gives a reflection , Absorption and refractive surface. If the sliding angle 0 of the incident wave is not greater than the critical sliding angle 0 ', that is 0 ⁇ 0', total reflection takes place. Such wave does not destroy and does not transmit energy from the first medium (drilling fluid) to the second medium (metal), which is why the total energy of the incident wave is reflected and scattered back to the first medium.
  • central outlet channel is designed with a conical taper and its end face is rounded.
  • the design of the end face of the central outlet channel with a radial rounding is due to the need to keep hydraulic losses when guiding the drilling fluid through the tangential outlet channels into the annular space, and improves the quality of the vacuum in the zone near the borehole.
  • the cutting and shearing type drill bit according to the invention contains a body 1 (FIGS. 1, 2), to whose matrix 2 rock-destroying organs 3 of the cutting and shearing type are attached.
  • the body 1 is provided with a swirl chamber 4 with tangentially arranged inlet channels 5 and a conically tapering central outlet channel 6, the end face 7 of which is radially rounded.
  • the swirl chamber 4 is provided with a conical wave reflector 8.
  • the taper ⁇ (Fig. 3) of the surface of the wave reflector 8 becomes from the relationship 0 ⁇ ⁇ 20 ' determined where 0 'is the critical sliding angle of a wave incident on the reflector.
  • Tangentially directed outlet channels 9 are embodied in the lower part of the body 1.
  • the part of the matrix 2 closest to the body 1 (FIGS. 1, 4) is in the form of a hollow truncated cone with a changing steepness of the generatrix 10 (FIG. 5) of the conical surface and with the base and top surface (11, 12 ), which are shaped according to the Archimedean spiral, while the cover surface (12) faces the body 1.
  • Continuous radial grooves 13 are formed on the side surface of the matrix 2 and are connected to the outlet channels 9 by a cavity 14 formed in the body 1.
  • the cavity of the swirl chamber 4 can have a spherical shape.
  • the swirl chamber 4 (FIG. 7) can be carried out in the body 1 itself.
  • the cutting and shearing type drill bit according to the invention operates as follows.
  • the drilling fluid is directed through a drill string into the tangentially directed inlet channels 5 (FIG. 1). Furthermore, the drilling fluid flows into the swirl chamber 4.
  • the drilling fluid is rotated at a rotation frequency of 5.102 to 8.102 s ⁇ 1.
  • the rotating drilling fluid is through the tangential outlet channels 9 and the radial grooves 13 directed into the annular space.
  • the intensity of the rotation of the drilling fluid increases suddenly.
  • the kinetic energy of the turbulent flow conveys the drilling fluid into the annulus in radially divergent directions.
  • a negative pressure is generated in the swirl chamber 4 and in the central zone of the sole.
  • powerful hydrodynamic pressure pulses of the self-oscillation type are generated in the zone near the borehole.
  • the amplitude and the frequency of the waves generated depend on the geometric parameters of the swirl chamber 4, the pressure drop, the density and the amount of the liquid to be pumped through.
  • the hydroacoustic waves generated by the device spread in two directions: towards the inside of the swirl chamber 4 and onto the bottom of the borehole.
  • the inward hydroacoustic waves are received by the tapered wave reflector 8, totally reflected from the tapered surface, scattered in the drilling fluid and have no destructive effect on the head of the swirl chamber 4, thereby increasing 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 stone 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 drilling wells using rock-destroying organs of the cutting and shear 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)
EP92106929A 1991-05-06 1992-04-23 Trépan carottier avec destruction hydrodynamic du noyau Expired - Lifetime EP0512329B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SU4928470 1991-05-06
SU4928470 1991-05-06

Publications (3)

Publication Number Publication Date
EP0512329A2 true EP0512329A2 (fr) 1992-11-11
EP0512329A3 EP0512329A3 (en) 1993-05-05
EP0512329B1 EP0512329B1 (fr) 1995-02-22

Family

ID=21570313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106929A Expired - Lifetime EP0512329B1 (fr) 1991-05-06 1992-04-23 Trépan carottier avec destruction hydrodynamic du noyau

Country Status (3)

Country Link
US (1) US5220966A (fr)
EP (1) EP0512329B1 (fr)
DE (1) DE59201436D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1014561A3 (nl) * 2002-01-09 2003-12-02 Diamant Drilling Service Procede pour le forage d'un puits et trepan rotatif pour la mise en oeuvre de celui-ci.
CN114458161A (zh) * 2022-04-14 2022-05-10 金石钻探(唐山)股份有限公司 一种非硬岩取芯钻头及其加工工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462128A (en) * 1992-10-20 1995-10-31 Gray; Clifford R. Cutter bit for use in drilling operations
US6390211B1 (en) 1999-06-21 2002-05-21 Baker Hughes Incorporated Variable orientation nozzles for earth boring drill bits, drill bits so equipped, and methods of orienting
US20100193253A1 (en) * 2009-01-30 2010-08-05 Massey Alan J Earth-boring tools and bodies of such tools including nozzle recesses, and methods of forming same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224054A (en) * 1988-09-29 1990-04-25 Shell Int Research Drill bit equipped with vortex nozzles and vortex nozzle for use in the bit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144087A (en) * 1961-01-05 1964-08-11 Edward B Williams Iii Drill bit with tangential jet
SU1104231A1 (ru) * 1982-06-02 1984-07-23 Ивано-Франковский Институт Нефти И Газа Буровое долото
US4619335A (en) * 1984-08-16 1986-10-28 Mccullough Doyle W Enhanced circulation drill bit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224054A (en) * 1988-09-29 1990-04-25 Shell Int Research Drill bit equipped with vortex nozzles and vortex nozzle for use in the bit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1014561A3 (nl) * 2002-01-09 2003-12-02 Diamant Drilling Service Procede pour le forage d'un puits et trepan rotatif pour la mise en oeuvre de celui-ci.
CN114458161A (zh) * 2022-04-14 2022-05-10 金石钻探(唐山)股份有限公司 一种非硬岩取芯钻头及其加工工艺
CN114458161B (zh) * 2022-04-14 2022-06-24 金石钻探(唐山)股份有限公司 一种非硬岩取芯钻头及其加工工艺

Also Published As

Publication number Publication date
EP0512329B1 (fr) 1995-02-22
EP0512329A3 (en) 1993-05-05
DE59201436D1 (de) 1995-03-30
US5220966A (en) 1993-06-22

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