EP0088705B1 - Marteau pneumatique du type "fond-de-trou" - Google Patents

Marteau pneumatique du type "fond-de-trou" Download PDF

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Publication number
EP0088705B1
EP0088705B1 EP83400495A EP83400495A EP0088705B1 EP 0088705 B1 EP0088705 B1 EP 0088705B1 EP 83400495 A EP83400495 A EP 83400495A EP 83400495 A EP83400495 A EP 83400495A EP 0088705 B1 EP0088705 B1 EP 0088705B1
Authority
EP
European Patent Office
Prior art keywords
air
chamber
piston
hammer
supply
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
Application number
EP83400495A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0088705A1 (fr
Inventor
Christian De Gelis
Marcel Techy
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.)
Stenuick Freres SA
Original Assignee
Stenuick Freres SA
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 Stenuick Freres SA filed Critical Stenuick Freres SA
Priority to AT83400495T priority Critical patent/ATE16954T1/de
Publication of EP0088705A1 publication Critical patent/EP0088705A1/fr
Application granted granted Critical
Publication of EP0088705B1 publication Critical patent/EP0088705B1/fr
Expired 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
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers

Definitions

  • the present invention relates to a pneumatic drilling hammer, and more particularly a hammer of the “down-the-hole” type, that is to say intended to work at the very bottom of the hole that is being drilled.
  • Such devices are therefore placed at the end of a set of tubes which serve to transmit the compressed operating air to it as well as the thrust and the general rotational movement to regularize the action of the perforating cutter.
  • Such pneumatic hammers intended for working at the bottom of the hole generally comprise a tubular body supplied with compressed air, a distribution mechanism, a striking piston, and a cutting edge receiving the impacts of the striking piston to transmit them to the rock.
  • the striking piston is movable in a cylinder formed by an inner jacket, and between the jacket and the inner wall of the hammer body are provided longitudinal passages serving to bring the compressed air acting on the piston, other passages serving the exhaust of air after its action on either side of the striking piston.
  • Such hammers When such hammers are provided for an independent supply of a cuttings flushing fluid, they comprise an axial connection piece to the piping for supplying the fluid through the drilling tubes, and an axial tube passing right through the whole assembly of the hammer, that is to say in particular the striking piston, to come out in an axial bore formed in the cutter.
  • a pneumatic hammer has been described for example in the French patent published under the number 2,044,939.
  • the present invention allows a significant reduction in these costs, and in particular, with the same drilling efficiency, a significant reduction in energy consumption.
  • the invention therefore relates to a pneumatic drilling hammer of the “down-the-hole” type, comprising a tubular body supplied with compressed air carrying a perforating cutter, and in which a striking piston is set in reciprocating motion in an inner jacket forming sheath by a mechanism for distributing compressed air alternately above and below the striking piston so that it cyclically strikes the cutting edge and goes up.
  • the hammer comprises two separate supplies of compressed air, respectively at high and low pressure, the distribution mechanism alternately ensuring the supply of high pressure air to the upper chamber above the striking piston to project it towards the cutting with exhaust from the lower chamber, then the low-pressure air supply from the lower chamber to raise the piston with exhaust from the upper chamber.
  • the supply of low pressure air to the lower chamber is provided by an internal axial chamber of the striking piston, while the supply of high pressure air to the upper chamber is provided by lights. crossing the sheath and longitudinal grooves formed externally in the thickness of the sheath.
  • the main body 1 of the hammer is screwed at its lower part onto a nozzle 2 in which slides the grooved tail of the perforating cutter 3.
  • the tail of the cutter is stopped in rotation relative to the body, and limited in axial displacement by a tangential key 4 which bears on a clearance 5 of the tail.
  • a cylindrical sheath 7 internally doubles the body 1 over almost its entire length.
  • the sleeve 7 is supported on a spacer ring 8 of generally conical shape, pierced with radial holes 9, and which itself is supported on the end piece 2.
  • the other end of the sleeve 7 is in abutment on a ring 10 provided with radial conduits 11.
  • the ring 10 is held by the end of the connection endpiece 13 screwed onto the body 1.
  • the endpiece 13 receives the usual parts for connection with the hammer feed and maneuvering tubes and rods.
  • the part 15 which transmits the thrust on the hammer forms a first annular conduit 16 around a tube 17; a second annular conduit 18 is formed between the internal face of the tube 17 and a central tube 19.
  • the sleeve 7 serves as a guide for the sliding striking piston 21 which can move freely between a low position as shown in Figure 1 where it is in contact with the end of the tail of the cutter, and a high position as we will see later in the description of the operation of the device.
  • the upper part of the striker 21 permanently encloses the lower part of the tube 17, the solid lower end 23 of which has channels 24 which make the annular duct 18 communicate with a central chamber 25 inside the striker 21.
  • the chamber 25 is extended by two axial conduits 26 and 27, the latter opening at the bottom of the batter. Externally the striker 21 has a circular groove 28.
  • the outer surface of the sleeve 7 has three series of longitudinal grooves; to simplify the drawing, only one groove of each type has been shown here.
  • a first series of upper grooves 30 communicates the annular chamber 31 which surrounds the ring 10 with as many orifices 32 which open out inside the sheath.
  • a second series of lower grooves 34 lead to the annular chamber 35 surrounding the lower ring 8; the orifices 36 and 37 pass through the wall of the sheath 7 and open into these grooves 34.
  • a third series of grooves 39 connects the orifices 40 and 41 which also pass through the wall of the sheath 7.
  • the chamber 35 communicates with the outside of the hammer by the conduits 9, by the games between the grooves of the cutting edge and the conjugate grooves of the end piece 2, and by the chamber 47 which communicates to the outside via the exhaust ducts 48.
  • the central tube 19 is used for the supply of water used to drive the cuttings down the hole.
  • the tube 19 is extended at the bottom until it enters the tail of the cutter which has a central conjugate channel 43.
  • the penetration of the tube into the tail of the cutter is determined so that the tube remains engaged whatever the position. of the cutting edge in its axial displacement.
  • the central channel 43 is extended by a channel 44 which opens out through orifices 45 at the periphery of the cutter in order to drive out the cuttings.
  • the outer annular duct 16 is supplied with compressed air at high pressure, for example at 20 to 25 bars.
  • the inner annular duct 18 is supplied with compressed air at low pressure, for example at 6 bars.
  • FIG. 2 the striking piston 21 is shown in the low position, just after its impact on the tail of the cutter.
  • the high pressure air fills the conduit 16, the intermediate chamber 49, the conduits 11, the annular chamber 31, the grooves 30 and the orifices 32; but these, inside the sheath, are closed by the striker 21 and the high pressure air remains trapped in the grooves 30.
  • the low pressure air which arrives via the conduit 18 passes through the conduits 24 in the chamber 25, and from there via the conduits 26 and 27 fills the lower chamber 50 under the striker 21.
  • the pressure in the lower chamber 50 causes the striker 21 to rise without any reaction other than its own weight because the upper chamber 51 then communicates freely with the exhaust outside the hammer through the orifices 36, the grooves 34 and the chamber 35.
  • the low-pressure air supply is interrupted by closing the orifices 24 by the walls of the chamber 26.
  • the chamber 50 is turned on. the exhaust through the opening of the orifices 37 which then make it communicate with the grooves 34.
  • the striker 21 first closes the high pressure supply to the chamber 51, then puts the latter in the exhaust by uncovering the orifices 36. A little before the impact on the end of the tail of the cutting edge the exhaust of the chamber 50 is closed by closing the orifices 37, then the low pressure air is again brought into the chamber 50 by opening the orifices 24 on the chamber 25, and the cycle can start again.
  • both the high pressure air after action in the upper chamber 51 and the low pressure air after working in the lower chamber 50 are found mixed in the chamber 35, then at the outlet of the hammer in conduits 48.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Jib Cranes (AREA)
EP83400495A 1982-03-11 1983-03-11 Marteau pneumatique du type "fond-de-trou" Expired EP0088705B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83400495T ATE16954T1 (de) 1982-03-11 1983-03-11 Im bohrloch angeordneter pneumatischer schlagantrieb.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8204077 1982-03-11
FR8204077A FR2523202A1 (fr) 1982-03-11 1982-03-11 Marteau a entrainement pneumatique du type " fond-de-trou "

Publications (2)

Publication Number Publication Date
EP0088705A1 EP0088705A1 (fr) 1983-09-14
EP0088705B1 true EP0088705B1 (fr) 1985-12-11

Family

ID=9271855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400495A Expired EP0088705B1 (fr) 1982-03-11 1983-03-11 Marteau pneumatique du type "fond-de-trou"

Country Status (4)

Country Link
EP (1) EP0088705B1 (enrdf_load_stackoverflow)
AT (1) ATE16954T1 (enrdf_load_stackoverflow)
DE (1) DE3361460D1 (enrdf_load_stackoverflow)
FR (1) FR2523202A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957220A (en) * 1995-10-17 1999-09-28 Dresser-Rand Company Percussion drill assembly
US5662180A (en) * 1995-10-17 1997-09-02 Dresser-Rand Company Percussion drill assembly
US7040417B2 (en) 2003-12-11 2006-05-09 Cct Technologies, L.L.C. Drilling systems
CN106320983B (zh) * 2016-11-08 2018-12-18 贵州高峰石油机械股份有限公司 一种超深水随钻下套管的方法及装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2044939A5 (enrdf_load_stackoverflow) * 1969-05-23 1971-02-26 Stenuick Freres
US4054180A (en) * 1976-02-09 1977-10-18 Reed Tool Company Impact drilling tool having a shuttle valve
US4084647A (en) * 1976-07-01 1978-04-18 William Lister Pneumatic percussion hammer
ES453523A1 (es) * 1976-11-20 1977-11-16 Miralles Valle Charles Mejoras en los martillos de fondo para perforaciones de rocay suelos.
FR2424408A1 (fr) * 1978-04-24 1979-11-23 Stenuick Freres Taillant de perforation pour marteau pneumatique fond-de-trou
EP0022865B1 (en) * 1978-12-15 1984-08-01 Furukawakogyo Co.Ltd Hydraulically-driven downhole drill

Also Published As

Publication number Publication date
FR2523202B1 (enrdf_load_stackoverflow) 1984-04-13
ATE16954T1 (de) 1985-12-15
DE3361460D1 (en) 1986-01-23
EP0088705A1 (fr) 1983-09-14
FR2523202A1 (fr) 1983-09-16

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