EP0096037A1 - Perforatrice hydraulique au rochet. - Google Patents

Perforatrice hydraulique au rochet.

Info

Publication number
EP0096037A1
EP0096037A1 EP82902170A EP82902170A EP0096037A1 EP 0096037 A1 EP0096037 A1 EP 0096037A1 EP 82902170 A EP82902170 A EP 82902170A EP 82902170 A EP82902170 A EP 82902170A EP 0096037 A1 EP0096037 A1 EP 0096037A1
Authority
EP
European Patent Office
Prior art keywords
drill bit
hydraulic
drill
drilling
drill string
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
EP82902170A
Other languages
German (de)
English (en)
Other versions
EP0096037B1 (fr
Inventor
Karl-Erik Nyman
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT82902170T priority Critical patent/ATE17516T1/de
Publication of EP0096037A1 publication Critical patent/EP0096037A1/fr
Application granted granted Critical
Publication of EP0096037B1 publication Critical patent/EP0096037B1/fr
Expired legal-status Critical Current

Links

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
    • E21B4/00—Drives for drilling, used in the borehole
    • 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 refers to a hydraulically operated down-the-hole rock drill adapted for drilling deep, thick and rough holes in the rock and in firm ground.
  • rotary drilling is mainly tsed when drilling holes of the type mentioned above, which means that a specially shaped drill bit is pressed down and simultaneously rotated into the ground. Due to the fact tha the drill bit is provided with inserts of different shapes, the rock or eart material is crushed or ground.
  • the drill bit is mounted on a tubular drill string, the .diameter of which is smaller than the diameter of the dril bit:
  • the drill string is imparted a rotational movement by means of a machin assembly placed above ground.
  • This machine assembly also comprises means for supporting the drill string.
  • the rock and earth material called the cutting ground by the drill bit is transported to the ground level by flushing with water or any specially composed washing or flushing fluid, so called drillin mud.
  • the flushing is performed by pressing the drilling mud by means of a pu through a centre hole in the drill string and through flush openings in the drill bit at the bottom of the bore hole, whereupon the drilling mud flows to the ground level on the outside of the drill string and thus carries away the cuttings.
  • the main parts of the cuttings are separa ⁇ ted from the drilling mud, e.g. by settling the mud in basins, whereupon it is again pumped down through the drill string.
  • It is also knov/n to perform rotary drilling by using an engine which is sunk down into the bore hole and is attached to the lower end of the drill string, which is non-rotating. The engine is directly driven by the drilling mud.
  • the machines used for this application are usually driven by compresse air, i.e. the impact piston is driven by compressed air.
  • the compressed air is normally also taking care of the flushing up of the cuttings.
  • this method uses a so-call sinker hammer, which means that the bore hammer with its impact piston is mounted on a tubular drill string and is sunk down into the bore hole by me of a rotary machine with essentially the same construction as the one descri above for rotary drilling.
  • the compressed air is taken from an air compressor on the ground level and is blown through the drill string and driving the i pact piston, which directly strikes against the drill bit, whereupon the c pressed air flushes the cuttings up to the ground level outside the drill string.
  • One drawback of this method is that its capacity of deep drilling i limited. However, the method is substantially faster than rotary drilling, especially in hard rock.
  • hydraulically driven hammer rock drills have been de ⁇ veloped, which in principle differ from the compressed-air driven hammer drilling machines by the fact that the impact piston is operated by hydrau lic oil under high pressure. The flushing of the cuttings is taken care of separately by compressed air or a drilling mud.
  • Such hydraulically driven hammer rock drills have so far only existed in the form of so-called "abov ground machines", i.e. with the bore hammer machine working in a machine u placed on the ground level. Thus, these machines have a limited capacity i drilling deep and thick holes. However, theirdrill ng capacity is substant ly higher than the capacity of the compressed-air driven at the same energ consumption.
  • the drilling mud drives a ro bust hydraulic engine placed immediately in connection with the drill bit in the bore hole.
  • the output shaft of the engine is used to drive an impac apparatus which strikes against the drill bit, i.e. so.called hammer dril ⁇ ling.
  • the impact apparatus is hydraulically driven the output shaft of the engine is adapted to drive a hydraulic pump to provide high pressure hydraulic fluid to the impact apparatus.
  • the hydraulic fluid is thus enclo ⁇ sed in a closed circuit and a very clean hydraulic oil of high grade may be used in order to guarantee a safe operation.
  • the hammer rock drill in accordance with the invention which has been sunk down, may be brought to rotate by means of a machine unit placed at • the ground level or alternatively, the output shaft of the hydraulic en ⁇ gine may also provide rotation of the drill bit. It is an advantage that the drill bit only carries the load of the hydraulic engine and the impact apparatus and is independent of the length of the drill string supplied in the hole, which easily can be provided by means of a pilot control.
  • the present invention also relates to an apparatus for carrying out the above mentioned hammer drilling.
  • Fig. 1 is a longitudinal view in section of one embodiment of the invention and Figs. 2 to 7 are cross-sectional views of the embodiment of Fig. 1 taken along the lines II-II, III-III, IV-IV, V- VI-VI and VII-VII. Best mode of carrying out the invention and industrial applicability
  • the apparatus mainly consists of seven interconnected or integral units, which in Fig. 1 are denoted A - G.
  • Unit A consists of a tubular drill string of known construction, which is composed of separate pieces interconnected by means of tapered thread joints and extends to the ground level.
  • the drill string is brought ro rotate by means of a machine unit on the ground level, which also com ⁇ prises devices of known contruction for inserting and taking up the drill string of the bore hole.
  • the drill string is dimensioned to withstand not only any appearing torque or axial forces but even a comparatively high in ⁇ side hydraulic pressure from the drilling mud.
  • Unit B consists of a feeding or pilot control unit by means of which it is assured that the drill bit is pressed against the bottom of the bore hole with an adequat force.
  • Unit C consists of a hydraulic engine of known construction, which during an acceptable time of life may be driven by means of the hydraulic energy of the drilling mud. This drilling mud may be water or any other drilling mud or liquid and 1s mixed with soil particles. The length of the hydraulic engine is great compared to its diameter.
  • Unit D consists of a hydra!ic pump of known construction, but with a special construction. The hydraulic pump emits clean high pressure hydrau ⁇ lic, oil.
  • Unit E consists of an oil tank with an oil filter.
  • the length of the oil tank is great compared to its diameter and it is provided with passa- ges in the wall of the tank for the drilling mud and the hydraulic oil.
  • Unit F consists of a hydraulically driven hammer rock drill, whose fundamental mode of action with regard to the impact mechanism does not differ from known constructions.
  • the hammer rock drill is adapted to be able to work as a sinkhammer downwards in the bore hole, and so it is i.a. provided with flushing passages for the drilling mud and an adapter for transferring of torque, axial forces and strokes directly to the drill bit.
  • Unit G consists of a drill bit of known construction including inserts or pins made of hard carbide steel as well as flushing passages for the drilling mud.
  • the apparatus of the invention comprises a drill string 1, which con ⁇ sists of a number of interconnected drill strinc sections.
  • the drill string 1 is the connecting link to the ground level.
  • the pilot unit (B) is connec-
  • This consists of a top unit 2, a cylinder tube 3 and a base unit 4, all units being interconnected by means of thread joints.
  • the lower portion of the cylinder tube 3 is provided with four circumferentially spaced openings 5.
  • the base unit 4 is provided with a square passage 6.
  • a piston 7 is movably arranged inside the cylinder tube 3 and sealed thereagainst.
  • the piston is fixedly attached to a piston rod 8, which is tubular with a square outer shape.
  • the piston rod 8 runs with a small or loose fit in the square passage 6 of the base unit 4.
  • the upper portion of the piston rod is provided with a valve mechanism 9, consisting of a cylindrical tube with a valve opening 10. This cylindrical tube is closed at the top end and fits closely in a cylindrical hole 11 in the top unit 2.
  • Drilling mud is pressed through the boring tube 1, and the direction of the drilling mud appears from the solid line arrows in Fig. 1.
  • the drilling mud flows through the valve openings 10, through the piston rod 8, which is hollow and through a hydraulic engine 12.
  • the drilling mud presses the piston 7 downwards as the fluid pressure is lower in the cylinder tube 3 under the piston 7, which space communicates with the bore hole outside the cylinder tube.
  • the hydraulic engine 12 is provided with an inlet opening 13 and an outlet opening 14 for the drilling mud and is also provided with an outlet shaft 15 which is brought to rotate when the drilling mud flows through the engine.
  • the engine is of a well-known construction and will not be de ⁇ scribed more closely herein. Any engine may be used that can be driven by the drilling mud without being destroyed in a short period of time.
  • the outlet shaft 15 of the hydraulic engine is connected to the inlet shaft 17 of a hydraulic pump 16.
  • the hydraulic pump emits high pressure hydraulic oil (15-20 Pa) to a damping accumulator 19, which is comprised in the hammer rock drill 18.
  • the hydraulic oil is transferred to a slide mechanism 20 of the hammer rock drill, the construction of which implies that an impact piston 21 is given a rapid reciprocating impact movement.
  • the impact piston 21 strikes with its lower portion against an adapter 22, at which the drill bit 23 is firmly threaded.
  • the impact from the impact piston is thus transferred to the drill bit, which crushes soil or rock material in the bottom of the bore hole.
  • the hydraulic oil is returned from the slide mechanism 20 to an oil tank 24 and thence back to the hydraulic pump 16.
  • the drilling mud When the drilling mud has left the hydraulic engine 16 it is transpor ⁇ ted through passages 26 past the oil tank 24 and the hammer rock drill 18 to the adapter 22 and out through a flushing hole 25 in the drill bit 23.
  • the bottom of the bore hole is flushed from crushed material (cuttings), which is carried by the drilling mud upwards along the outside of the ap ⁇ paratus between the apparatus and the wall 27 of the bore hole up to the ground level, where the drilling mud is collected in separate basins in which the main part of the cuttings is separated from the drilling mud whereupon it is pumped down once again through the drill string.
  • the torque from a rotary machine (not shown) placed at the ground level is transferred through the drill string 1 and the pilot unit(B)throug the square passage 6 and the square piston rod 8 to the other integral unit C-F. From the hammer rock drill (F) the torque is transferred to the adapte and the drill bit 26 since the adapter is provided with splines 28.
  • the apparatus When the drilling is to be started the apparatus is connected by means of thread jounts to a rotary machine placed on the ground level, whereupon the apparatus is sunk down into the bore hole until the drill bit reaches the ground level or the bottom of the bore hole.
  • the top unit 2 moves towards the valve mechanism 9, of which the outside cylindrical part is inserted into and cooperates with the upper cylindrical holes 11 of the top unit with a good fitting.
  • the inner channel, i.e. the cylindrical hole 11, of the drill string is sealed so that the drilling mud is prevented from passing further through the pis ⁇ ton rod 8.
  • the drill string 1 is lifted a small distance until the top edge of the valve mechanism 9 exposes the cylindrical hole 11 in the top unit and gives free passage for the drilling mud.
  • the rotary machine starts to rotate the drilling string and thus the appa ⁇ ratus as well as starts the pump placed at ground level for the drilling mud.
  • the hydraulic engine and the hydraulic pump set the impact piston into operation and the hammer rock drill is moved downwards as the drill bit crushes soil or rock material.
  • the drill string 1, the top unit 2 and the cylinder tube 3 rotate without moving vertically.
  • the feed pressure on the drill bit 26 only consists of the dead weight of the units C-G, the piston 7 and the piston rod 8, and the hydraulic differential pressure on the top of the piston 7.
  • the step-by-step sinking of the drill string 1 into the bore hole a distance corresponding to the piston stroke may be done automatically for example by means of the mechanism of the rotary machine which performs the 25 vertical movements of the drill string (feed unit).
  • This mechanism may be adapted to sink the drill string when the hydraulic pressure instantaneously decreases in the drilling mud and to stop when the pressure instantaneously increases in relation to preset values.
  • the drill string may also be fed with a constant preset feeding rate, the feeding rate being modified by the 30 sensor signals disclosed above.
  • the apparatus provides a comparatively constant and limited pres ⁇ sure on the drill bit during drilling, which is desired for example in or ⁇ der to decrease the wear of the drill bit and the torque required. Moreover, it is prevented that the inpact piston strikes against the drill bit when- 35 it is not resting on the bottom of the bore hole, which is essential in or ⁇ der not to damage the drill bit.
  • the pilot control makes it possible for the drill string to move vertically a limited distance during drilling if the pump for the
  • OMPI drilling mud is provided with an overflow valve, so that the drilling mud overflows at the pump on the ground level, if the pressure in the drilling mud exceeds a preset value. This makes it possible for example to perform drilling with a drilling machine mounted on a raft which is moving verti- cally during high sea.
  • the hydraulic pump may be any known type of pump, e.g. a diagragm pump.
  • the hydraulic engine and the hydraulic pump may be replaced by two mechanically interconnected hy ⁇ draulic cylinders, one of which works as an engine and is driven by the drilling mud and the other works as a pump for the hydraulic oil.
  • a suitable ratio for the cross-sectional areas of the two hydraulic cy ⁇ linders of e.g. 3:1 the desired pressure for the hydraulic oil may be ob- tained.
  • the slide and valve mechanism of the hydraulic pistons may be in ⁇ terconnected for mutual movement.
  • the apparatus in accordance with the invention is intended for drill ⁇ ing very deep holes, e.g. drilling for oil. Especially at drilling for oil at sea, the costs of operation per day are very high. For this reason the apparatus in accordance with the invention only has to be constructed in such a way to safely manage to drill one complete bore hole, after which operation the apparatus may ge discarded. However, if the apparatus stops working or gets stuck when the drilling of the hole has come half way, the costs for taking up the apparatus or possibly drill a new sloping hole ad- jacent the apparatus that has got stuck may be very high.
  • the apparatus in accordance with the invention manages a bore rate which is approximately twice the bore rate of known drills for drilling oil, a substantial saving may be obtained when drilling such deep holes, especially when drilling forOil at sea.
  • the invention described above refers to a method and an appara ⁇ tus for making bore holes in the ground or rock where the drilling mud has the double function of driving a hydraulic hammer rock drill at the bottom of the bore hole on the one hand, and on the other hand to flush out crush ⁇ ed soil or rock material from the bore hole. Due to the invention it will now be technically possible to make bore holes of up to several thousand meters depth with a hammer rock drill where an impact piston strikes the drill bit which is simultaneously rotated. This means that the drilling capacity (drilling rate) with regard to known methods may be doubled and in some cases even tenfolded, i.a. depending on the hardness of the rock. O ⁇

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Lubricants (AREA)
  • Drilling Tools (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Control Of Electric Motors In General (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Catalysts (AREA)
  • Fertilizing (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

Procédé et appareil de perforation de trous profonds dans la roche ou autre. L'appareil est adapté pour être fixé à l'extrémité d'un cordon de forage (1) et être descendu au fond d'un trou de forage (27). L'appareil comprend une unité de commande pilote (D), un moteur hydraulique (12), une pompe hydraulique (16), un appareil à percussion (21) et un trépan de forage (23). La boue de forage qui est descendue au travers du cordon de forage pour innonder et remonter les débris séparés entraîne le moteur hydraulique qui est d'une construction robuste et supportera les effets de la boue de forage abrasive. L'arbre de sortie (15) du moteur entraîne la pompe hydraulique qui pompe du fluide hydraulique d'un grade élevé jusqu'à l'appareil à percussion qui est un marteau perforateur entraîné hydrauliquement, de construction connue. Le piston de percussion frappe contre le trépan. L'appareil entier est en rotation à l'aide d'une machine rotative placée sur le niveau du sol. Grâce à l'unité de commande pilote (B), l'appareil n'a qu'à porter son propre poids mort et des ouvertures et des soupapes assurent une dérivation et un arrêt, respectivement, pour la boue de forage.
EP82902170A 1981-07-13 1982-07-09 Perforatrice hydraulique au rochet Expired EP0096037B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82902170T ATE17516T1 (de) 1981-07-13 1982-07-09 Hydraulische bohrloch-gesteinsbohrmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8104328 1981-07-13
SE8104328A SE8104328L (sv) 1981-07-13 1981-07-13 Hydraulisk senkborrmaskin

Publications (2)

Publication Number Publication Date
EP0096037A1 true EP0096037A1 (fr) 1983-12-21
EP0096037B1 EP0096037B1 (fr) 1986-01-15

Family

ID=20344244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82902170A Expired EP0096037B1 (fr) 1981-07-13 1982-07-09 Perforatrice hydraulique au rochet

Country Status (10)

Country Link
EP (1) EP0096037B1 (fr)
JP (1) JPS58501082A (fr)
AT (1) ATE17516T1 (fr)
CA (1) CA1201946A (fr)
DE (1) DE3268535D1 (fr)
DK (1) DK156518C (fr)
FI (1) FI76865C (fr)
NO (1) NO162352C (fr)
SE (1) SE8104328L (fr)
WO (1) WO1983000183A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535780A1 (fr) * 1982-11-04 1984-05-11 Boniface Andre Perfectionnement aux marteaux-fond de trou pour forage des sols
SE444127B (sv) * 1984-06-25 1986-03-24 Atlas Copco Ab Tryckvetskedriven senkborrmaskin
FR2597543B1 (fr) * 1986-04-17 1988-06-24 Soletanche Dispositif pour le forage immerge de fondations
NO169088C (no) * 1989-11-08 1992-05-06 Norske Stats Oljeselskap Trykkforsterker for montering ovenfor borkronen ved den nedre ende av et boreroer for dypboring, samt trykkforsterkergruppe omfattende et flertall slike trykkforsterkere
CA2096433A1 (fr) * 1990-11-19 1992-05-20 Knut V. Horvei Groupe convertisseur et convertisseur de pression
US5361857A (en) * 1990-11-19 1994-11-08 Den Norske Stats Oljeselskap A.S. Pressure converter
FR2694332B1 (fr) * 1992-07-30 1994-10-14 Jacques Campguilhem Marteau piqueur fond de trou hydraulique.
AU2010200944B2 (en) * 2009-09-17 2018-02-22 Jfk Equipment Limited Drilling Apparatus
CN202337976U (zh) * 2011-06-17 2012-07-18 北京荣创科宏岩土工程有限公司 潜孔冲击高压旋喷注浆设备
EP3336301B1 (fr) 2016-12-19 2023-09-13 BAUER Maschinen GmbH Perforatrice rotative et procédé de fabrication d'un alésage
CN112922530B (zh) * 2021-02-05 2022-03-29 吉林大学 一种定向钻进用空气反循环潜孔锤自回转钻具
CN114382406A (zh) * 2022-02-22 2022-04-22 山西开源益通矿业设备制造有限公司 定向冲击岩孔施工设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1101265A (fr) * 1954-03-18 1955-10-04 Procédé de forage et dispositif pour la mise en oeuvre de ce procédé
GB764099A (en) * 1954-12-10 1956-12-19 Bataafsche Petroleum Improvements in or relating to well drilling assemblies
NL286163A (fr) * 1961-11-30 1900-01-01
US3232362A (en) * 1963-11-12 1966-02-01 Cullen Well drilling apparatus
US3899033A (en) * 1974-01-03 1975-08-12 Huisen Allen T Van Pneumatic-kinetic drilling system
US3964558A (en) * 1974-11-13 1976-06-22 Texas Dynamatics, Inc. Fluid actuated downhole drilling device
US4256191A (en) * 1979-03-28 1981-03-17 Reed Tool Company Intermittent high-drag oil well drilling methods and apparatus
GB2055927A (en) * 1979-08-10 1981-03-11 Eng Enterpr Wellbore drilling tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300183A1 *

Also Published As

Publication number Publication date
ATE17516T1 (de) 1986-02-15
WO1983000183A1 (fr) 1983-01-20
DE3268535D1 (en) 1986-02-27
DK156518C (da) 1990-01-22
DK156518B (da) 1989-09-04
FI76865B (fi) 1988-08-31
NO162352B (no) 1989-09-04
EP0096037B1 (fr) 1986-01-15
CA1201946A (fr) 1986-03-18
FI832846A0 (fi) 1983-08-08
FI832846A (fi) 1983-08-08
DK117283A (da) 1983-03-11
JPS58501082A (ja) 1983-07-07
FI76865C (fi) 1988-12-12
NO162352C (no) 1989-12-13
SE8104328L (sv) 1983-01-14
NO830837L (no) 1983-03-10
DK117283D0 (da) 1983-03-11

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