EP0189764A2 - Dispositif pour le forage à percussion de longs trous - Google Patents

Dispositif pour le forage à percussion de longs trous Download PDF

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Publication number
EP0189764A2
EP0189764A2 EP86100227A EP86100227A EP0189764A2 EP 0189764 A2 EP0189764 A2 EP 0189764A2 EP 86100227 A EP86100227 A EP 86100227A EP 86100227 A EP86100227 A EP 86100227A EP 0189764 A2 EP0189764 A2 EP 0189764A2
Authority
EP
European Patent Office
Prior art keywords
key
check valve
valve
line
hydraulic
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
EP86100227A
Other languages
German (de)
English (en)
Other versions
EP0189764A3 (fr
EP0189764B1 (en
Inventor
Friedrich-Karl Dr.-Ing. Arndt
Hans-Dieter Piotrowski
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.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
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 Fried Krupp AG filed Critical Fried Krupp AG
Priority to AT86100227T priority Critical patent/ATE48178T1/de
Publication of EP0189764A2 publication Critical patent/EP0189764A2/fr
Publication of EP0189764A3 publication Critical patent/EP0189764A3/fr
Application granted granted Critical
Publication of EP0189764B1 publication Critical patent/EP0189764B1/de
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints
    • E21B19/167—Connecting or disconnecting pipe couplings or joints using a wrench adapted to engage a non circular section of pipe, e.g. a section with flats or splines

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • boring bars When hitting holes in rock and the like. boring bars are used which have a thread at both ends and can be screwed together by means of threaded sleeves to form a drill string or drill string.
  • the hammer and turning energy is transferred from the hammer drill to the cutting edge of the drilling tool via the screwed together rod, the so-called drill string.
  • the threads in the sleeves are pulled together very strongly under the considerable stress of hammering and turning.
  • the immediate loosening of the threaded connection by hand is replaced by hydraulic functions that are triggered by the operator on a control panel.
  • this requires a line of sight from the operator located on the control panel to the threaded connection to be released and also requires a considerable amount of practice and concentration from the operator.
  • the slewing gear which slowly rotates the boring bar, must be stopped at the moment in which the key surfaces of the double edge of the boring bar are aligned parallel to the wrench surfaces of the spanner.
  • this is not easy, among other things, because the square - even if the boring bar is not particularly dirty - only stands out from the rest of the bar with little contrast.
  • the drive of the hydraulic cylinder moving the key must be stopped at the moment in which the open-end wrench touches the boring bar, ie immediately after its linear movement has ended, since the clamping device must be actuated before the rotary movement of the open-end wrench.
  • the handling of the known device involves further disadvantages and risks.
  • the wrench may be rotated before the clamping device holds the threaded sleeve. In such a case, it is necessary to retract the key cylinder and to initiate the rotary movement of the key which releases the threaded connection. If the upper boring bar is unscrewed after loosening the thread, however, the entire remaining boring bar hangs positively in the mouth of the key over the square.
  • the invention has for its object to design a device for striking drilling holes in rock, which avoids the disadvantages described and in particular allows a safe “threading" of the key on the square of the drill rod and in which the drive of the key cylinder in the Moment is ensured when the key sits on the square.
  • the device should be such that the key cylinder is held securely in its end position until the detached drill pipe is gripped again by the adapter of the boring machine.
  • the chamber of the key cylinder for the rotary movement of the key about the axis of the boring bar can be subjected to the full, undiminished working pressure, so that the key with the for loosening the threaded connection between the boring bar and the Threaded sleeve necessary torque is moved.
  • the cylinder chamber of the key cylinder provided for this purpose is connected to a pressure accumulator, which is also subjected to the full working pressure during the rotational movement of the key. Due to the check valve piloted by the opposite cylinder chamber, the torque holding the key in its end position is maintained until the other cylinder chamber of the key cylinder is pressurized to withdraw the key.
  • the hydraulic hammer 3 has a hydraulic hammer 3 which can be moved up and down on a carriage 5 carried by a drilling carriage 4.
  • the hydraulic hammer 3 is provided with a rotating mechanism 6, which is driven by a rotating motor 7 and has an adapter 8 at its lower end for gripping boring bars 10.
  • the boring bars 10 have - cf. Fig. 2 - at both ends a left-hand thread 11 and then a square 12 with two parallel key faces 13.
  • the drill rods 10 can be connected to one another by means of internally threaded sleeves 15 to form a drill string or drill pipe, the first or lowest drill rod 10 being provided with a drilling tool 10 '.
  • the device has a magazine 17 with a lower and an upper receptacle 18 and 19. Under the lower magazine receptacle 18 there is a clamping device 20 and an open-end wrench 21.
  • the clamping device 20 serves to hold the threaded sleeves 15 and consists of a double-armed lever 24 actuated by a hydraulic cylinder 23 - hereinafter also referred to as a clamping cylinder - and a fixed counter tool 25 , the end of the short lever arm 26 of the lever 24 serving as the actual clamping tool.
  • the clamping of a sleeve 15 is brought about by the retraction of the extended piston rod 27 of the clamping cylinder 23, the loosening takes place in the opposite manner by moving out the piston rod 27.
  • the open-end wrench 21 has two pins 28, 29 through which it is positively guided.
  • the pin 28 closest to the mouth of the key 21 is guided directly in a pair of cam grooves 30, while the pin 29 which is further away from the mouth is provided with cam rollers 31 which are guided in another pair of cam grooves 32.
  • the free end of the key 21 is articulated to the piston rod 34 of a hydraulic cylinder 35 - hereinafter also referred to as a key cylinder.
  • the curved grooves each have an oblique curve section 30a or 32a, each with a radial component pointing to the drill string 16 and a tangential component, and an essentially tangential curve section 30b or 32b extending around the drill string 16.
  • the tangential piece 32b of the outer curved grooves 32 is designed in an arc shape.
  • the key cylinder 35 is pivotally mounted about a fixed axis 36, which essentially extends the tangential or arcuate piece 32b of the outer cam groove 32 is arranged in the device 1.
  • the piston rod 34 of the key cylinder 35 is extended, the key 21 is moved onto the drill string 16 with a slight rotary movement. If the key is already partially seated on the square 12 of the boring bar 10 in question, the pins 28, 29 are each still in the oblique curve pieces 30a and 32a of the groove curves 30, 32.
  • the piston rod 34 is extended further, the key 21 is opened completely pushed the square and rotated around the axis of the drill string 16 with great torque through an acute angle.
  • a 4/3-way valve 40 is provided for switching the flow direction of the pressure medium and thus the direction of rotation of the rotary motor 7.
  • the device 1 has a smaller hydraulic or auxiliary pump 41, which supplies the rotary motor 7 with pressure medium in the event that the drill string 16 only has to be rotated at a low speed and low torque, for example around the in To bring the coming square 12 into the position corresponding to the wrench 21.
  • the line connection from the auxiliary pump 41 to the rotary motor 7 consists of the line section 42 and one of one 4/3-way valve 43 switchable line section 44, in which a simple check valve 45 is arranged which blocks in the direction of the directional valve 43.
  • the return of the pressure medium conveyed by the pump 41 through the rotary motor 7 takes place via a check valve 50, which is pilot-controlled by the line section 44, a pressure relief valve 51 and the 4/3-way valve 43.
  • the check valve 50 thus allows a flow in the blocking direction when the line section 44 is pressurized is. If, on the other hand, the line section 44 is depressurized, the check valve 50 closes.
  • a simple check valve 52 blocking the return line 48 and a throttle point or throttle valve 53 are connected in parallel with the pressure limiting valve 51.
  • the lower chamber 35a of the key cylinder 35 opposite the piston rod 34 is connected via a connecting line 55 to the line section 56 between the pilot-operated check valve 50 and the pressure limiting valve 51.
  • the line section 55 contains a simple check valve 57 blocking the line section 56.
  • the piston rod-side chamber 35b of the cylinder 35 withdrawing the key 21 is switchably connected to the return line 48 via a line section 58 with a further 4/3-way valve 59.
  • the section 55a of the line 55 lying between the check valve 57 and the cylinder chamber is connected on the one hand to a pressure accumulator 61 and on the other hand to the return line 48 via a check valve 62 piloted by the line section 58 and the 4/3-way valve 59.
  • the clamping cylinder 23 is connected via two line sections 63, 64 to a further 4/3-way valve 65, via which the two chambers 23a, b of the cylinder 23 can be connected alternately to the pump 41 and the return line 48.
  • the directional control valves 40, 43, 59 and 65 are actuated by hand levers mounted on a g at 4 Bohrwa s control panel positioned 67th
  • the hammer drill 3 When drilling a borehole 2, the hammer drill 3 is moved back empty on the carriage 5 after each drilling depth corresponding to the length of a boring bar 10. Then a new boring bar 10 provided with a sleeve 15 is gripped with the adapter 8 and screwed onto the last boring bar 10 to form a drill string 16.
  • the hammer drill 3 with the drill string 16 on the carriage 5 is retracted upwards until the upper square 12 of the second drill rod 10, seen from above, is at the level of the spanner 21, this stop being known Way done by a (not shown) limit switch.
  • the directional control valve 43 is switched to position 1.
  • the pump 41 thus conveys pressure medium through the line sections 42 and 44 into the rotary motor 7.
  • the pilot control by the pressure prevailing in the line section 44 prevents the check valve 50 from closing, so that the pressure medium from the motor 7 via the pressure relief valve 51 and the directional control valve 43 in the return line 48 can flow off.
  • pressure medium passes through the connecting line 55 into the cylinder chamber 35 a, so that the open-ended wrench 21 is moved onto the corresponding boring bar 10 with a weakened force corresponding to this pressure.
  • the time set in the memory 61 P gas voltage 61 is greater than the pressure p 51, so that the memory does not occur in this function.
  • the pressure medium displaced from the upper cylinder chamber 35b flows without pressure through the line section 58 and the directional control valve 59 in the position 0 into the return line 48. Since there is no pressure in the line section 58, the blocking function of the check valve 62 is not impaired.
  • the directional control valve 65 is then switched to position 1: the upper cylinder chamber 23a is pressurized by the pump 41 and the piston rod 27 is retracted.
  • the sleeve 15 of the boring bar 10 hanging on the adapter 8 is now pressed against the counter tool 25 by the short lever arm 26 of the lever 24, whereby rotation of the sleeve 15 is effectively prevented.
  • the line section 64 is depressurized by the switching position 1 of the directional control valve 65, so that the pressure medium located in the lower cylinder chamber 23b can flow off unhindered.
  • the directional valve 43 is switched to position 2.
  • the line section 44 is connected to the pressureless return line 48 and the pilot control of the check valve 50 is canceled.
  • the line section 56 and thus the cylinder chamber 35a are acted upon by the pump 41 via the check valve 52 with the full working pressure p 0 .
  • the wrench 21 is pressed with a large force corresponding to this pressure in the positive guidance given by the curve pieces 30b and 32b about the axis of the drill string 16 and exerts a correspondingly large torque on the second drill rod 10, as seen from above.
  • the directional control valve 43 is switched back to the initial position 0.
  • the full working pressure p is nevertheless maintained in the lower cylinder chamber 35a because the check valves 57 and 62 prevent pressure equalization.
  • the key 21 thus remains unchanged on the square 12 of the drill rod 10, which ensures that the rest of the drill string 16 hanging on the key 21 is securely held.
  • the directional valve 65 is first switched to position 2, so that the lower cylinder chamber 23b is pressurized and the clamping action of the clamping device 20 on the sleeve 15 is released.
  • the directional control valve 40 is switched to position 2, whereby the pump 37 pressurizes the rotary motor 7 via the line 38.
  • the pump 37 pressurizes the rotary motor 7 via the line 38.
  • the upper boring bar 10 with the sleeve 15 is twisted off the thread 11 of the threaded rod 10 hanging in the key 21.
  • the turned boring bar is placed in the magazine 17.
  • the hammer drill 3 with the adapter 8 is guided downwards on the carriage 5 and the directional control valve 40 into the Position 1 switched.
  • the motor 7 is now pressurized via the line 39 and the adapter 8 is screwed onto the free thread 11 of the boring bar 10 hanging in the key 21.
  • the directional valve 40 is switched back to its initial position O and the motor 7 is stopped.
  • the drill string 16 is now held securely by the adapter 8 of the boring machine, so that the key 21 can be withdrawn.
  • the directional valve 59 is brought into the switching position 1.
  • the upper cylinder chamber 35b is pressurized by the pump 41 via the line section 58.
  • the pilot control caused by the pressure prevailing in the line 58 prevents the check valve 62 from closing, so that the pressure in the lower cylinder chamber 35a and in the pressure accumulator 61 is reduced.
  • the drill string 16 hanging on the adapter 8 is raised with the boring machine on the carriage 5 until the square 12 of the second drill rod 10, seen from above, comes to a stand at the level of the key 21.
  • the hydraulic functions triggered by hand can be integrated into a higher-level, automatic sequence of the drilling process.
EP86100227A 1985-01-31 1986-01-09 Apparatus for percussion drilling long holes Expired EP0189764B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100227T ATE48178T1 (de) 1985-01-31 1986-01-09 Vorrichtung zum schlagenden bohren von langen loechern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3503171 1985-01-31
DE19853503171 DE3503171A1 (de) 1985-01-31 1985-01-31 Vorrichtung zum schlagenden bohren von langen loechern

Publications (3)

Publication Number Publication Date
EP0189764A2 true EP0189764A2 (fr) 1986-08-06
EP0189764A3 EP0189764A3 (fr) 1988-03-09
EP0189764B1 EP0189764B1 (en) 1989-11-23

Family

ID=6261222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100227A Expired EP0189764B1 (en) 1985-01-31 1986-01-09 Apparatus for percussion drilling long holes

Country Status (3)

Country Link
EP (1) EP0189764B1 (fr)
AT (1) ATE48178T1 (fr)
DE (1) DE3503171A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104213854B (zh) * 2013-05-31 2016-08-10 中国石油化工股份有限公司 一种移动液压式井下管柱装配工具
CN103422822B (zh) * 2013-07-11 2015-09-16 山西北方机械制造有限责任公司 一种采用伸缩支架结构的铁钻工支撑装置
CN104329036B (zh) * 2014-11-11 2016-10-12 阜南县奋进机械制造有限公司 车载电动液压振动式钻井机卸杆机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556536A (en) * 1946-12-17 1951-06-12 Hillman Kelley Power-driven, gear-operated, member-holding wrench
US3771389A (en) * 1972-05-19 1973-11-13 Ingersoll Rand Co Motorized tool assembly for drill rods
EP0087917A1 (fr) * 1982-02-24 1983-09-07 Dualco Manufacturing Ltd. Machine à forer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556536A (en) * 1946-12-17 1951-06-12 Hillman Kelley Power-driven, gear-operated, member-holding wrench
US3771389A (en) * 1972-05-19 1973-11-13 Ingersoll Rand Co Motorized tool assembly for drill rods
EP0087917A1 (fr) * 1982-02-24 1983-09-07 Dualco Manufacturing Ltd. Machine à forer

Also Published As

Publication number Publication date
DE3503171A1 (de) 1986-08-07
ATE48178T1 (de) 1989-12-15
EP0189764A3 (fr) 1988-03-09
EP0189764B1 (en) 1989-11-23

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