EP0006656A1 - Dispositif pour l'extraction de minéraux par un trou de forage - Google Patents

Dispositif pour l'extraction de minéraux par un trou de forage Download PDF

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Publication number
EP0006656A1
EP0006656A1 EP79200311A EP79200311A EP0006656A1 EP 0006656 A1 EP0006656 A1 EP 0006656A1 EP 79200311 A EP79200311 A EP 79200311A EP 79200311 A EP79200311 A EP 79200311A EP 0006656 A1 EP0006656 A1 EP 0006656A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
shots
borehole
drill pipe
articulated
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
EP79200311A
Other languages
German (de)
English (en)
Other versions
EP0006656B1 (fr
Inventor
Wouter Hugo Van Eek
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of EP0006656A1 publication Critical patent/EP0006656A1/fr
Application granted granted Critical
Publication of EP0006656B1 publication Critical patent/EP0006656B1/fr
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
    • 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/29—Obtaining a slurry of minerals, e.g. by using nozzles
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/10—Machines which completely free the mineral from the seam by both slitting and breaking-down

Definitions

  • the invention relates to a device for the extraction of minerals through a borehole, the device essentially consists of shots attached to a drill pipe and mutually articulated connected, which can be introduced into the already drilled borehole in a stretched state and from means with the help of which the wefts are then brought into a zigzag position and moved back and forth in the axial direction, while there are means at the joint connections of the wefts that loosen up the mineral outside the borehole wall and discharge it through the same borehole with the aid of thick irrigation.
  • US Pat. No. 3,961,824 describes a method in which a similar device is used.
  • the device described there shows insufficient stability under certain operating conditions. It is not always possible to distribute all forces evenly over the joint points, and it is just as impossible to allow all joint connections to deflect to the same degree.
  • the presence of the cable construction, with the help of which the shots are placed in the zigzag position the risk of damage to the cable is very great.
  • the construction becomes very complicated by using a cable.
  • the object of the present invention is also a more expedient embodiment of the device of the type described at the beginning.
  • the sleeve there are three shots which are accommodated in the sleeve in the stretched state.
  • the sleeve is then provided on opposite sides with longitudinal slots through which the three shots can be moved to opposite sides in a zigzag position.
  • the middle shot has a pivot point that can be displaced in the axial direction relative to the sleeve, so that the opposite shots always protrude to the same extent on both sides of the sleeve.
  • the slots sometimes extend so far that the middle shot can be brought almost perpendicular to the sleeve.
  • the sleeve will be of tubular design and have such a diameter that the tube can easily be pushed to the end of the bore even in the case of an oblique bore.
  • the shots are of such a length that their width in the zigzag position is a multiple of the sleeve diameter. This width may vary and may exceed the diameter of the sleeve by some, but also by 20 m or more.
  • the mineral loosening agent can consist of chisels attached to the joint connections of the shots. Because rinsing liquid is required to discharge the detached mineral through the borehole, nozzles are preferably arranged at the articulation points, which process the material by means of a jet pipe effect. This means that hard coal can be loosened up fairly easily using liquid jets.
  • the invention is thus characterized in that the means for loosening a mineral substance consist of liquid nozzles which are attached close to the articulated connections or on the articulation points of the shots, in such a way that the liquid jet is directed away from the sleeve. It makes sense to guide the liquid through the shots to the nozzle parts.
  • the shots are hollow. It is advisable not to pass the fluid through the joints, which in this case must have a complicated construction and can therefore easily become blocked.
  • the joints are preferably designed as completely closed ball bearings. Flexible high pressure hoses are used so that the fluid flowing through the shots can still pass through the articulated connections. The hoses are located on the inside of the joints so that they are not easily damaged.
  • the sleeve remains fixed in the original borehole. It can happen that such an amount of mineral is taken away that the sleeve is no longer stable in the resulting space.
  • the reaction forces of the spray nozzles act in such a way that a moment acts on the device, which in this case is insufficiently absorbed.
  • the use of only two shots, which are in the stretched state in the sleeve fitting into the borehole, is preferred and the sleeve has only a single longitudinal slot through which the two shots can protrude. In this case, only a single nozzle or a set of nozzles is used and a channel is only attached to one side of the borehole. The sleeve leans completely against the unworked borehole wall. Also in other ways, e.g. unwanted reaction forces can be intercepted with the help of a guide installed in the borehole.
  • the means interacting with the sleeve, which can axially stress the outer shots consist of a hydraulically excited plunger, which interacts with the sleeve and exerts an axial force on the shot facing the drill pipe via an articulated connection, the last shot facing away from the drill pipe is articulated on the end of the sleeve.
  • the plunger is sealed against a sleeve which can be screwed to the lower part of the drill pipe, the thread of the screw thread being that of the connections of the drill pipe opposite, the sleeve is rotatably mounted relative to the sleeve and shots, and an abutment on the sleeve limits the stroke length of the plunger with respect to the sleeve.
  • the plunger must be hollow so that liquid can flow through the drill pipe to the shots. The plunger, which is displaced towards the shots by the action of the liquid pressure, exerts an axial pressure on these shots.
  • the shots are swung out.
  • the stroke length of the piston is limited by the stop on the sleeve. If the sleeve is axially adjusted by turning the drill pipe, the stop moves at the same time, which also changes the swivel angle of the shots.
  • the channels are formed by the action of the water jets and by moving the drill pipe back and forth on the surface of the day.
  • the sleeve attached to the rod with the swung-out shots consequently moves back and forth in the mineral mountains and long channels form on both sides of the borehole due to the action of the water jets (or in special cases, as already discussed, on only one side of the borehole ).
  • the piston and thus sleeve and sleeve can be moved back and forth over a length which corresponds to the effective length of the Cylinder corresponds.
  • a large length for example in the order of a few tens of meters, does not pose any problems.
  • Fig. 1 shows a drill string 1 in a borehole, not shown.
  • the lower part 2 consists of an adjustable hydraulic pressure mechanism with plunger 3 to be described in more detail with reference to FIG. 3.
  • This pressure mechanism is rotatably connected at 4 to the tubular sleeve 5, which forms the frame of the extraction system.
  • This sleeve 5 has longitudinal slots 6 and 7, which are mutually offset and at the same time in the longitudinal direction of the sleeve 5 with respect to each other.
  • the three shots 8, 9 and 10 can be swung out through these slots 6 and 7. In this example, the length of the shots 8 and 10 is approximately half that of the shot 9.
  • Shot 9 has articulated connections 9 ′′ which can be displaced in the fixed axial guide 9 ′ and which are designed as pins on both sides of the associated shot 9. The middle of this The shot, based on the sleeve 5, remains fixed thereby.
  • Shot 8 is articulated at 4 with plunger 3 connected;
  • Shot 10 is articulated at 12 on end part 11 of sleeve 5 and shots 8, 9 and 10 are connected to one another by articulated connections 13 and 14.
  • nozzles or nozzle sets 15 and 16 are arranged in such a way that the liquid jet emerging from these nozzles is directed as perpendicularly as possible from the sleeve 5.
  • Sleeve 5 and all accessories are introduced into the borehole using the drill pipe 1 to extract mineral (e.g. hard coal).
  • the shots 8, 9 and 10 are then folded together in the sleeve 5 (see Fig. 1).
  • liquid is fed to the nozzles 15 and 16 under high pressure through boring bar 1, plunger 3 and shots 8 and 9.
  • the sleeve 5 is moved back and forth by the upward and downward movement of the linkage 1. Due to the action of the liquid jets emerging from the nozzles 15 and 16, material is detached from the borehole wall, so that shallow channels are formed on both sides of the borehole.
  • the shots 8, 9 and 10 are then brought into the zigzag position shown in FIG. 2 by controlling the pressure mechanism and the action of the plunger 3. The shots are already partially in the channels formed.
  • the channel length is determined by the stroke length of the sleeve 5 and also by the possibilities of the mechanism for moving the drill pipe 1.
  • the loosened material is discharged together with the liquid from the nozzles 15 and 16 through the annular space of the borehole.
  • Shots 8, 9 and 10 can be removed as a unit.
  • the catch head 20 shown in FIG. 3 on the piston 3, with the aid of which the pivotable part is pulled out completely with the aid of a catch device introduced through the pipe linkage using a rope.
  • Fig. 3 shows a possible embodiment of an adjustable hydraulic pressure mechanism for the swing-out shots 8, 9 and 10.
  • the sleeve 5 is rotatably connected at 21 to the lower part 22 of the drill pipe 1 or a corresponding part (40).
  • This part 22 is equipped on the inside with a left screw thread 23 with a large pitch. This thread works together with the corresponding screw thread 24 of the bush 25.
  • the piston 3 can move axially in the sleeve 25. This piston is sealed with one or more O-rings 26 against the bush.
  • the piston 3 is articulated to the swing-out shot 8, as shown in FIGS. 1 and 2. If the plunger 3 (with the pressure valve 27 still closed) is supplied with liquid pressure through the drill rod 1, it moves in the direction of the wefts 8, 9 and 10, which thereby pivot out. They swing out until the plunger 3 with the collar 28 hits the edge 29 of the sleeve 25. Due to the increase in the liquid pressure, valve 27 will open so that the liquid has access to the nozzles 15 and 16 through pistons 3 and the wefts 8 and 9. The entire device is then moved back and forth, the above-mentioned channels forming or existing channels being enlarged.
  • drill rods 1 and thus also part 22 are rotated to the right.
  • the sleeve 25 cannot turn.
  • the piston 3 is namely articulated on one side with the shots 8, 9 and 10. These shots are fixed in the resulting gutter.
  • the plunger 3 cannot rotate.
  • Wedge 30 of the bush 25, which cooperates with this piston in a keyway 31 of the piston 3, ensures that the bush 25 cannot rotate either.
  • the rotation of the drill pipe 1 has the consequence that the sleeve moves towards the sleeve 5.
  • the stop 29 is also displaced and the piston 3 can move further towards the sleeve 5, so that the wefts 8, 9 and 10 also swing out further.
  • the piston 3 is equipped with a catch head 20, so that this and the shots from the Borehole can be removed.
  • the head 20 has a passage opening 32 for the liquid.
  • the check valve 45 opens by increasing the pressure in the annular space Liquid will push the extraction system upwards in its entirety and be held back by the stop 45. Then, by increasing the liquid pressure in the drill pipe 1, i.e. during the jet effect of the swung-out shots, the entire system will move in the opposite direction. The liquid will slowly leave the space 48 through narrow openings in the nozzles until the piston 50 is stopped by the stops 44 and 46. As a result of the pressure effect and friction between the two stops, part 40 can turn around with the drill string 1, as a result of which the shots 8, 9 and 10 can swing out further.
  • the empty space 48 can fill again when the pressure in the pipe string is relieved and increases again in the annular space, whereby the swung-out shots are first moved into the extended position and then the spring of the shut-off valve 45 is pressed in so much that this Valve opens and liquid flows into space 48 again. This initial situation has already been mentioned above.
  • a 56 cm drill hole is drilled from the surface of the day using an inclined drilling tower at an angle of 30 °.
  • a 40.6 cm standpipe is concreted in at a depth of 230 m.
  • a 37.5 cm hole is drilled in the strike and the inclination of the borehole is increased by 2 degrees every 30 m, using modern inclined drilling machines.
  • a borehole inclination of 80 0 is reached.
  • a 1 m thick seam is drilled with an inclination of approx. 10 0 , corresponding to the strike of the borehole.
  • a 27.3 cm long lining pipe is now cemented and the bore continues in the direction of the seam inclination.
  • a 24.8 cm chisel with nozzle parts can be used to loosen up the coal in a seam length of 1000 m. Because hard coal is generally easier to loosen by spraying than the bedrock, the chisel will preferably follow the seam falling. Most of the time, the seam can be found again after any faults with the help of the known inclined drilling devices.
  • a 21.9 cm guide tube is now inserted with the help of 11.4 cm rotary drill pipes to the end of the 1000 m long scratch area.
  • a number of devices according to the invention are used with increasing lengths. In this calculation example, only the last phase is considered, where the gutter van 10 is extended to 20 m.
  • the sleeve 5 has an outer diameter of 14 cm. This does not apply to cylinder 50, whose outer diameter is 11.4 cm.
  • the drill pipe 1 attached to the 11.4 cm rotary drill consists of a 17.8 cm 'extreme line' lining pipe. If the Shots 8, 9 and 10 can swing out at a maximum angle of 60 with respect to each other, the length of the longest swiveling shot is 23 m and that of the shorter swiveling shots 11.50 m.
  • Attachments are used to mount the nozzle parts, which are attached as close as possible to each of the two protruding articulation points on the swiveling shot.
  • Each attachment has seven nozzles arranged in an arc, each with a cross section of 3 mm.
  • a reaction force of 970 N is triggered at a liquid pressure drop of 20 MPa.
  • the nozzles must be mounted in the attachment in such a way that they are as close as possible to the joint. In order to achieve a pressure drop of 20 MPa, a quantity of 1.1 m water per minute is circulated.
  • the hydraulic capacity of the nozzles against the coal wall is approximately 365 kW.
  • the pressure losses in the rotary drill are approximately 1.0 PMa and 0.05 MPa in the annular space.
  • the turbulent flow in the annular space is still able to convey coal particles of 2 cm in diameter, so that the loosened material is not difficult to remove.
  • the necessary assets are supplied by the liquid, so there is no need for an electrical cable, as mentioned in the American patent mentioned.
  • the energy requirement corresponds to the energy expenditure recorded in a traditional coal mine.
  • the forces acting on the shots can be calculated from the frictional resistance between the seam and scratches. Assume this number is 0.4. If, in the case of an inclination of 10 °, the weight of the device is able to partially remove the friction, it can be calculated whether the shots are subjected to a compressive or a pulling force. It can now be seen that the lower shot has a pressure effect of 755 N at the moment when it starts to work, ie with a channel width of 10 m. A pressure of 176 N acts on this shot when the channel has become 20 m wide. Because a 11.50 m long shot before reaching pressure point of this size is of course acceptable. In the case of a 10 m wide channel, the second and longest swiveling shot has a pressure of 1167 N.
  • the pressure is still 814 N.
  • the upper shot has a pressure of in the case of a 10 m wide channel 1285 N and a pressure of 471 N for a 20 m wide channel.
  • it is also possible to reduce the coefficient of friction for example by applying a zinc layer to the swiveling steel sections or by using plastics or other means which reduce the friction.
  • An additional advantage is that the swing-out shots are subject to less wear.
  • a pressure drop in the order of 20 MPa in the nozzles should be preferred for coal extraction.
  • the effective distance can be four to twelve times the nozzle diameter, i.e. approx. 1.2 to 3.6 cm.
  • the flow at the joint opposite to the nozzles will decrease by 100% and in the middle of the nozzles by 75%, which is sufficient to loosen up the mineral.
EP79200311A 1978-06-19 1979-06-16 Dispositif pour l'extraction de minéraux par un trou de forage Expired EP0006656B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7806559A NL7806559A (nl) 1978-06-19 1978-06-19 Inrichting voor het winnen van mineralen via een boor- gat.
NL7806559 1978-06-19

Publications (2)

Publication Number Publication Date
EP0006656A1 true EP0006656A1 (fr) 1980-01-09
EP0006656B1 EP0006656B1 (fr) 1982-04-07

Family

ID=19831058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200311A Expired EP0006656B1 (fr) 1978-06-19 1979-06-16 Dispositif pour l'extraction de minéraux par un trou de forage

Country Status (4)

Country Link
US (1) US4278137A (fr)
EP (1) EP0006656B1 (fr)
DE (1) DE2962436D1 (fr)
NL (1) NL7806559A (fr)

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US6708764B2 (en) 2002-07-12 2004-03-23 Cdx Gas, L.L.C. Undulating well bore
US8376052B2 (en) 1998-11-20 2013-02-19 Vitruvian Exploration, Llc Method and system for surface production of gas from a subterranean zone
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US7073595B2 (en) 2002-09-12 2006-07-11 Cdx Gas, Llc Method and system for controlling pressure in a dual well system
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US6575255B1 (en) 2001-08-13 2003-06-10 Cdx Gas, Llc Pantograph underreamer
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US7360595B2 (en) 2002-05-08 2008-04-22 Cdx Gas, Llc Method and system for underground treatment of materials
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US7571771B2 (en) 2005-05-31 2009-08-11 Cdx Gas, Llc Cavity well system
WO2015142333A1 (fr) * 2014-03-20 2015-09-24 Halliburton Energy Services, Inc. Joint à verrouillage automatisé dans un train d'outils de puits de forage
CN112343914A (zh) * 2019-03-04 2021-02-09 李吴军 一种适用于盲孔植入的自锁螺杆

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US2008583A (en) * 1935-01-14 1935-07-16 John H Janssen Enlarging tool for wells
US2290502A (en) * 1938-12-29 1942-07-21 Dow Chemical Co Apparatus for forming subterranean cavities
US2450223A (en) * 1944-11-25 1948-09-28 William R Barbour Well reaming apparatus
US2690325A (en) * 1948-09-02 1954-09-28 Newton B Dismukes Machine for increasing the subterranean flow of fluid into and from wells
DE1220805B (de) * 1964-12-24 1966-07-14 Salzgitter Maschinen Ag Bohreinrichtung zum Herstellen von Grosslochbohrungen
GB1091844A (en) * 1964-05-25 1967-11-22 Glowny Instytut Gornictwa Equipment for the high pressure hydraulic mining of coal from longwall faces
GB1199031A (en) * 1967-06-14 1970-07-15 Navenby Ltd Improvements in or relating to Cutter Bits and methods of Anchoring
DE2027590A1 (de) * 1969-08-06 1971-02-11 Continental Oil Company, Ponca City, OkIa (V St A ) Kerbvorrichtung zum Einbringen von Ker ben in ein Bohrloch
DE2321962B1 (de) * 1973-05-02 1974-05-09 Brueckner Grundbau Gmbh, 4300 Essen Vorrichtung zum Erweitern von Bohrlöchern
GB1378712A (en) * 1973-02-01 1974-12-27 Universal Anchorage Holdings L Cutter bit

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US2847189A (en) * 1953-01-08 1958-08-12 Texas Co Apparatus for reaming holes drilled in the earth

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008583A (en) * 1935-01-14 1935-07-16 John H Janssen Enlarging tool for wells
US2290502A (en) * 1938-12-29 1942-07-21 Dow Chemical Co Apparatus for forming subterranean cavities
US2450223A (en) * 1944-11-25 1948-09-28 William R Barbour Well reaming apparatus
US2690325A (en) * 1948-09-02 1954-09-28 Newton B Dismukes Machine for increasing the subterranean flow of fluid into and from wells
GB1091844A (en) * 1964-05-25 1967-11-22 Glowny Instytut Gornictwa Equipment for the high pressure hydraulic mining of coal from longwall faces
DE1220805B (de) * 1964-12-24 1966-07-14 Salzgitter Maschinen Ag Bohreinrichtung zum Herstellen von Grosslochbohrungen
GB1199031A (en) * 1967-06-14 1970-07-15 Navenby Ltd Improvements in or relating to Cutter Bits and methods of Anchoring
DE2027590A1 (de) * 1969-08-06 1971-02-11 Continental Oil Company, Ponca City, OkIa (V St A ) Kerbvorrichtung zum Einbringen von Ker ben in ein Bohrloch
GB1378712A (en) * 1973-02-01 1974-12-27 Universal Anchorage Holdings L Cutter bit
DE2321962B1 (de) * 1973-05-02 1974-05-09 Brueckner Grundbau Gmbh, 4300 Essen Vorrichtung zum Erweitern von Bohrlöchern

Also Published As

Publication number Publication date
US4278137A (en) 1981-07-14
NL7806559A (nl) 1979-12-21
EP0006656B1 (fr) 1982-04-07
DE2962436D1 (en) 1982-05-19

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