WO2002092955A2 - Dispositif de forage - Google Patents

Dispositif de forage Download PDF

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Publication number
WO2002092955A2
WO2002092955A2 PCT/EP2002/005139 EP0205139W WO02092955A2 WO 2002092955 A2 WO2002092955 A2 WO 2002092955A2 EP 0205139 W EP0205139 W EP 0205139W WO 02092955 A2 WO02092955 A2 WO 02092955A2
Authority
WO
WIPO (PCT)
Prior art keywords
tube
boring device
earth boring
inner tube
tubes
Prior art date
Application number
PCT/EP2002/005139
Other languages
German (de)
English (en)
Inventor
Hermann Gehlen
Original Assignee
Wirth Maschinen- Und Bohrgeräte Fabrik 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 Wirth Maschinen- Und Bohrgeräte Fabrik Gmbh filed Critical Wirth Maschinen- Und Bohrgeräte Fabrik Gmbh
Publication of WO2002092955A2 publication Critical patent/WO2002092955A2/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F16L39/005—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies for concentric pipes
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/18—Pipes provided with plural fluid passages
    • 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
    • E21B7/04—Directional drilling
    • E21B7/046—Directional drilling horizontal drilling

Definitions

  • the invention relates to an earth boring device of the type corresponding to claim 1.
  • An earth boring device of this type is known for example from US 4,953,638.
  • the drill head described there is attached to a drill pipe with which the drill head can be driven in a rotating and pushing manner.
  • the drill head has a substantially wedge shape.
  • a drilling blade is attached to one of the wedge surfaces, while a nozzle is arranged on the other wedge surface, the jet direction of which is at a slight angle to the direction of advance, i.e. the drill head axis is inclined so that the nozzle points approximately in the forward direction.
  • the drill head must be turned while drilling straight ahead. For a change in direction, the drill head is brought into a position in which the wedge surface carrying the drill blade points towards the side opposite to the desired deflection direction.
  • the drill head is then static, i.e. driven through the drill pipe without rotation. It deflects in the desired deflection direction due to the flat side of the drill blade serving as the control surface.
  • the drilling fluid emerging from the nozzle serves to support the drilling action, i.e. the
  • the drilling fluid can simultaneously serve to displace the soil located in front of the drilling blade.
  • the drilling fluid loosens the soil in front of the drill head in a cone that is relatively narrow around the drilling axis. This reduces the resistance of the soil in the direction of advance, while on the other hand the soil around the drill head remains firm. Although this reduces the resistance, the friction caused by the rotation of the linkage is still very high, so that the required
  • Torque must be very high.
  • the drilling device In order to lay a product pipe in the ground, the drilling device is first used to make a pilot hole, for example with a length of 70, 80 or over 100 m. So that the earth bores can be produced over such long distances, it is necessary to always apply new sections of the drill pipe, the sections or drill sections being connected to one another by screwing on.
  • the rear end of the sections of the drill pipe is provided with an internal thread and the front end with an external thread - or vice versa - so that a subsequent section is screwed into the previous section.
  • the first section of the drill pipe with its external thread is screwed into a corresponding internal thread at the rear end of the drill head - or vice versa.
  • the invention is therefore based on the object of providing an earth boring device in which both the torque to be applied is reduced and there is a simple connection and disconnection of the drill rod.
  • the earth boring device in particular for pilot bores, is provided with an approximately cylindrical drilling head which can be rotated about its longitudinal axis by means of a rod and which, for its directional control, has at its front end a control surface inclined to the cylinder axis, at which at least one nozzle for the discharge of a pressurized one standing drilling fluid is arranged, the linkage comprising a rigid outer tube and an inner tube of smaller diameter rotatable within the outer tube for driving the drill head, an intermediate space being formed between the outer tube and the inner tube and the linkage consisting of several pilot tubes, it is possible to reduce the torque for the rotation of the drill head or the rod, since the rotation is now effected via the inner pipe and this is not in contact with the friction-increasing soil.
  • the inner tube is in the outer tube through the
  • An additional positive effect of the earth boring device according to the invention is that, compared to conventional single-pipe pilot rods, no material is under the outer tube, as the outer tube does not turn.
  • the pilot pipe string does not bend upwards in the embodiment according to the invention.
  • the intermediate space is advantageously connected to the at least one nozzle, so that the intermediate space between the tubes can be used as a transmission channel for a possible drilling fluid.
  • This can be used, for example, to lubricate the pilot linkage, particularly between the inner and outer tubes.
  • the plain bearings are advantageously provided with through bores and these in turn are provided with non-return seals.
  • the through holes thus allow drilling fluid to flow from one pilot tube to the next and the non-return seal ensures that the
  • plain bearings are made of plastic and / or steel and / or ceramic materials and / or other materials with a reduced coefficient of friction.
  • the pilot tubes can be plugged into one another so that the lengthening or shortening of the linkage can be carried out in a simple manner and without complex measures or tools, for which purpose the outer diameter of the outer tube and the inner tube of the pilot tubes are smaller at one end than at is the other end and the outside diameter of the smaller diameter end corresponds to the inside diameter of the other end.
  • the inner tube preferably has a profile, in particular a spline shaft profile, on the inside of the larger diameter end and a profile adapted to engage the profile, in particular spline shaft profile, on the outside of the smaller diameter end on.
  • the area of the outer pipes provided with the ring groove or the transverse grooves can be designed as a separate component. This can then be connected to the existing pipes or drill heads by screw connections, welding etc.
  • the non-return seals are advantageously designed as non-return membranes. This enables a particularly simple construction without complex mechanical parts.
  • the membrane can rest against the inner tube and / or a shoulder in the plain bearing and thus seal the passage bores in one direction of flow.
  • the slide bearings are preferably designed at least in two parts and the non-return membrane is also firmly anchored at one end between the at least two parts of the slide bearings.
  • the check membrane is advantageously highly flexible.
  • the outer tube is inserted loosely over the inner tube and this advantageously exists
  • the outer tube then consists of base tubes and intermediate pieces, the base tubes being connected to one another by the intermediate pieces.
  • the intermediate pieces can then be provided with seals, in particular O-ring seals.
  • Plain bearings can be distributed within the inner circumference of the base tubes, in particular, as already stated, made of materials with reduced coefficients of friction, for guiding the inner tube.
  • the space between the inner tube and the outer tube can also be used to supply a possible drilling fluid, as already described above.
  • the inner tubes can be carried out analogously to the above-mentioned plug connection by means of interlocking ends of the inner tubes and their securing by means of a clamping ring which engages in the aligned transverse grooves and annular grooves of the inner tubes.
  • the drilling fluid supply in particular a high-pressure flushing
  • the valve membranes can be used as back There is no impact valve in the slide rings between the inner and outer tube, since the outer tube is separated from the inner tube for assembly and disassembly, as this is only pushed on loosely.
  • the tube is advantageously arranged on the inner wall of the inner tube of the linkage. Conveniently, it can also be integrated in the wall of the inner tube, so that the entire diameter of the inner tube remains free. If the tubes in the individual inner tubes can be connected by means of interchangeable connecting means, in particular connecting plugs, these can be exchanged as wearing parts. Furthermore, these connecting means can be designed so that a confusion-free assembly is possible.
  • non-return seals can be provided in the pipes and / or connecting means analogous to the above statements.
  • the tubes can also be connected to the at least one nozzle in the drill head tip in order to supply the latter with drilling fluid. This also simplifies the mounting of the drill head on the outer tube, since it is now no longer necessary to mount the drill bit in a liquid-tight manner with respect to the outer tube when rotating.
  • FIG. 1 shows a longitudinal section through a pilot tube of the linkage according to the invention.
  • FIG. 2 shows a longitudinal section corresponding to FIG. 1 in a cutout, two tubes being inserted into one another;
  • FIG. 3 shows a cross section along the line II from FIG. 2;
  • Fig. 4 shows a drill head for driving the linkage
  • FIG. 5 shows an enlarged detail from FIG. 1 in the area of the slide bearing 5.
  • FIG. 6 shows a longitudinal section through a pilot tube linkage according to a further embodiment of the invention.
  • Fig. 7 shows a further embodiment of a pilot pipe linkage according to the invention in longitudinal section.
  • the pilot tube 50 consists of an outer tube 1 and an inner tube 2 arranged approximately concentrically therein. Between the outer tube 1 and the inner tube 2, an intermediate space 3 is formed which extends along the pilot tube.
  • the inner tube 2 is spaced from the outer tube 1 and is supported or guided by means of slide bearings 5 and 8, which are each in the initial or
  • the slide bearings 5 are preferably made of an abrasion-resistant plastic with good sliding properties (eg PTFE carbon) and are provided with through bores 6 and non-return seals 7.
  • the passage bores 6 ensure that a drilling fluid can flow from the intermediate space 3 of a pilot tube to the next intermediate space 3 of the subsequent pilot tube, the seal preventing the intermediate space from completely emptying when the rod is extended.
  • the slide bearings 8 are also provided with through-bores 9 in order to allow the drilling fluid to flow from an intermediate space 3, which is connected to the through-bores 9 by means of a narrow annular gap 14, into an annular gap 21.
  • the Annular gap 21 extends in the case of assembled pipes until just before the corresponding slide bearing 5, in front of which in turn a narrow annular gap 13 is arranged which merges into the passage bores 6 of the slide bearing 5 and thus allows the drilling fluid to flow into the next intermediate space.
  • the inner tube 2 is designed in the form of a spline in the profile and in the end region 20 accordingly for pushing it together.
  • the rotation is transmitted via the interlocking spline profile.
  • the outer tube 1 has in the initial region 19 a region 28 of smaller diameter which extends from the beginning of the tube and in which there is a circumferential annular groove 16.
  • a region 28 of smaller diameter which extends from the beginning of the tube and in which there is a circumferential annular groove 16.
  • the end region 20 of the tube 50 there is also a region 10 with a changed diameter, in which case it is not the outer diameter but the inner diameter of the tube 1 that is enlarged in comparison to the remaining part of the end region, corresponding to the diameter of the initial region 19 these areas are pushed over each other when putting two pipes together.
  • the end region 20 of the tube 50 has two transverse grooves 12, which are aligned with the circumferential annular groove 16 in the initial region 19 when the tubes are assembled.
  • a clamping ring 15 is inserted over the transverse grooves 12 into the circumferential annular groove 16 and thus secures the assembled pipes 50, 50 'against pulling apart.
  • the inner tube 2 of the tube 50 to be added is first turned by hand onto the spline profile in the initial region 19 on the Outside of the inner tube the corresponding "negative" spline profile on the inside of the end region 20 'of the inner tube of the preceding tube 50' matched and pushed. A non-rotatable connection is thus achieved.
  • the outer tubes 1 or V are pushed onto one another, i.e.
  • the outer area 1 with its initial area 19 of smaller diameter 28 is inserted into the end area 20 'of the preceding tube 50' or 1 'until the end face of the outer tube 1 bears against the circumferential surface 11' of the area 10 'with an enlarged inner diameter.
  • an alignment of the circumferential annular groove 16 of the attached pipe 50 with the transverse grooves 12 'of the first pipe 50' is thus achieved.
  • the plug connection is then secured by means of a clamping ring 15.
  • the configuration of the pilot tube 50 or 50 'described above ensures that the drilling fluid can flow from the intermediate space 3 of a preceding tube into the intermediate space 3' of the subsequent tube - as seen in the direction of the fluid supply.
  • the drilling fluid therefore initially flows from the first intermediate space 3 through the annular gap 14 and the through bores 9 of the slide bearings 8 into the second annular gap 21, which merges seamlessly into the annular gap 13 'of the preceding pipe.
  • the annular gap 13 'in turn is connected to the next intermediate by means of the passage bores 6' in the slide bearings 5. connected room 3 '.
  • the check seal 7' prevents the drilling fluid from flowing back.
  • the clamping ring 15 consists of a clamping spring 29 and two clamping jaws 30.
  • the clamping jaws 30 are each adapted approximately to the milled area of the transverse grooves 12, but reduced in height by the thickness of the clamping spring 29. The clamping jaws actually secure the plug connection of the two pipes.
  • the pipes are disassembled by placing a lever tool under the clamping spring 29, as a result of which it is levered out of the groove 12 or 16 and the clamping jaws 30 are released for removal.
  • FIG. 4 shows a boring head, designated as a whole by 200, for driving through the linkage 100.
  • the drill head 200 has a substantially cylindrical shape and at its front end a drill bit 31 provided for its directional control with a control surface 37 inclined to the cylinder axis.
  • the drill bit 31 is screwed onto the fastening piece 48 of the inner tube extension piece 46 by means of Allen screws 45.
  • the intermediate space 41 is supplied with drilling fluid from the intermediate space 3 of the subsequent pilot pipe of the linkage via circumferentially distributed slide bearings 42, which are provided with through bores and non-return seals and correspond to the slide bearing 5.
  • the drilling fluid flows from the intermediate space 41 of the drilling head 200 through axial bores 40 into a central bore 39 which extends along the drilling head and opens into a nozzle 38 in the control surface 37 of the drilling tip 31.
  • the nozzle is designed obliquely in the direction of the control surface and is used to rinse the drill bit 31 or to soften the soil or for jet cutting. If the nozzle 38 does not have to be used, it can be closed by a plug, not shown.
  • An LED target plate 43 which serves to control the direction of the drill string, can be inserted within the inner pipe extension 46.
  • Target plate 43 is fixed in the inner tube extension 46 by means of a grub screw 49.
  • the drill head 200 is provided at its end facing the rod with a connecting component 32 which is screwed onto the outer tube 33 of the drill head and is secured by means of grub screws 53.
  • This connecting piece 32 contains the circumferential sliding bearings 42 and essentially corresponds to the end region 20 of the pilot tube 50. It therefore also has two transverse grooves and an enlarged inner diameter in the outer tube 33.
  • In the inner tube there is a spline profile adapted to cooperate with a corresponding initial region 19 of a pilot tube of the linkage. the.
  • the rotary motion is therefore transmitted by means of the inner linkage or the inner tube extension 46 by means of the intermeshing spline profile. This rotary movement is then transmitted to the drill bit 31 via the fastening piece 48.
  • the connecting piece 32 acts upon the attachment of the drilling head 200
  • Pilot tube 50 thus for connection to the corresponding outer tube 1 of the pilot tube, as in the connection of two rod tubes described above, and secures the connection by means of the transverse grooves, the annular groove 16 and the clamping ring 15.
  • the pilot tube 50 is provided with a separate component 51 corresponding to the connecting piece 32, which component is designed to interact with a corresponding connecting piece 32, i.e. it has an area of reduced diameter in which the annular groove 16 is arranged in the connecting piece 32 for cooperation with the transverse grooves.
  • the component 51 can also be screwed onto the corresponding pilot tube 50 or its outer tube 1 and then fastened by means of a grub screw 52, which is attached in the axial direction in the outer tube and secures against unscrewing after the component 51 has been tightened.
  • the pilot tube 50 shown in FIG. 1 has at its end region 20 a component which corresponds to the connecting piece 32 and which is welded firmly to the outer tube 1.
  • a corresponding connecting piece 32 would also be conceivable.
  • existing pilot tubes could be replaced by appropriate ones
  • Components 32 and 51 are retrofitted to be connected by means of the plug-in system according to the invention.
  • the inner tube 2 is rotatably supported or guided on the outer tube only by means of the slide bearings 5 and 8 and is fixed in its longitudinal position by these bearings.
  • the bearings are each in corresponding circumferential ring grooves in the outer circumference of the inner tube or in the Inner circumference of the outer tube.
  • the inner tubes can therefore also be retrofitted.
  • the sliding bearing 5 consists of two sliding rings 61 and 62 which are pressed onto the outer circumference of the inner tube 2, wherein they sit in a recess 67 which prevents axial displacement of the sliding rings.
  • a correspondingly adapted shoulder 68 in the inner circumference of the outer tube 1 also fixes the slide bearing 5 or the slide rings 61, 62.
  • a sealing lip 66 is provided, which is provided in a recess of the second slide ring 62.
  • the drilling fluid enters from the annular gap 13 into the passage bore 6 of the slide bearing 5 and then flows further into the intermediate space 3 of the pilot tube 50.
  • a seal 7 is in each case, as already described above the through holes provided. This seal prevents kickback or leakage of the drilling fluid. It essentially consists of a non-return membrane 7, which is firmly anchored at its outer end between the two sliding rings 61 and 62.
  • the membrane is highly flexible and consists of a silicone-based plastic. Their inner diameter is smaller than the inner diameter of the slide rings so that the membrane can lay against the inner tube and thus seal in one direction of flow. It has an approximately S shape.
  • the membrane In the direction of flow (see direction arrow S), the membrane has the option of lifting off the inner tube 2 and allowing the drilling fluid to pass through.
  • the membrane 7 rests on a shoulder 65 of the first slide ring 61 and on the inner tube 2 and thus seals the passage bore 6, thereby preventing flow in the opposite direction.
  • the shoulder 65 is formed by a recess 63 which is arranged in the slide ring 62 or between the slide rings 61 and 62 and has an approximately square shape in cross section.
  • the check membrane 7 is clamped between the two sliding rings 61 and 62, for example, and / or glued, for which purpose a further recess 64 is provided in the outer circumference of the sliding bearing 5, which, for. B. is formed as a terminal cut in the outer circumference of the sliding ring 61. In this cutout, the membrane 7 is inserted with one end and then clamped against the second slide ring 62 by being pushed on.
  • FIG. 6 A further exemplary embodiment of the invention is shown in FIG. 6, corresponding parts being identified by a reference number increased by 300.
  • the string 400 of an earth drilling device is present
  • pilot tubes 350 each of which is constructed from an outer tube 301 and an inner tube 302 arranged approximately concentrically therein. Between these there is also a space 303, which, in contrast to the previous example, is not used to apply drilling fluid for flushing on the drilling head 450. A drilling fluid can also be applied to it, for example in order to apply pressure to the annular space via the appropriate fluid for lubricating the pilot train.
  • the outer tube which acts as a protective tube, is pushed during rotation without rotation, so that the torque of the inner tube is drastically reduced.
  • the outer tube 301 itself consists of base tubes 301 A, each of which has sleeves 301 B are interconnected.
  • the intermediate pieces 301 B are each sealed against the base pipes 301 A by means of pipe ring seals 301 C.
  • plain bearings 305 are arranged distributed over the length of the pilot linkage. As far as possible, these are in the start and end area of the
  • connection of the inner tubes takes place in accordance with the first embodiment, so that here again the type of connection is not carried out and reference is made to the above statements. It should be noted that such a connection of the inner tubes to one another via aligned grooves and securing by means of clamping rings is possible, since the outer tube is only loosely pushed on as mentioned above and is separated from the inner tube during assembly or disassembly, so that the corresponding connection points of the inner tube are freely accessible. It should also be mentioned that the inner tube is reduced in its inner diameter at the connection points in order to carry out the connection points with a suitable material thickness.
  • a nozzle 38 being provided for flushing, a rotating, pushing and striking drive is provided in the drilling head 450 of this embodiment.
  • a striking mechanism 430 is provided behind the drill head in the drive direction within the inner tube, which drives the drill head, which is designed to be displaceable in the longitudinal direction of the pilot linkage.
  • the percussion mechanism 430 itself is supplied with the appropriate drive means, for example drilling fluid which is under pressure, via the inner tube.
  • the next embodiment which is shown in FIG. 7 and designated as a whole by 500, differs essentially from that of FIG. 6 in that the drill head 550 is now also provided with nozzles 538, as in the first exemplary embodiment of FIG. 4 , through which the drill tip 531 can be rinsed.
  • the drill head 550 also has a control surface inclined to the cylinder axis
  • the corresponding nozzles 538 are arranged on the longer side and also serve as a control surface.
  • Corresponding warts 600 are embedded on the shorter side 551, which can be designed as hard metal pins, for example, in order to achieve a correspondingly good drilling performance in harder ground.
  • Parts of this embodiment correspond to the embodiment from FIG. 6 to which reference is made.
  • the inner tube 502 of the linkage 500 has a significant difference.
  • the nozzles 538 in the control surface 537 of the drill head 550 are not supplied with drilling fluid via the space 503 between the outer tube 501 and the inner tube 502, but rather via a separate tube 580, which is located on the inner circumference of the hollow inner tube parallel to it along the longitudinal axis of the Pilot linkage extends.
  • it can also be integrated into the inner wall of the tube itself. This eliminates the more complex Bearing of the drilling head sealing and sealing against the outer pipe and at the same time higher pressures are possible when drilling with drilling.
  • Connecting means 581 designed to connect to one another in a sealing manner when the pilot linkage is extended.
  • the connector plugs 581 are designed in such a way that they are interchangeable, since they are delivered as highly stressed parts subject to high wear.
  • they are designed in such a way that they can be assembled without any confusion, which has the particular advantage that the non-return membranes which can be integrated into these connecting plugs 581 and which cause the respective tube 580 to run dry during assembly. prevent disassembly or dismantling, be installed according to their direction of return.
  • the non-return seals themselves can be designed in accordance with the design for the first exemplary embodiment.
  • the tubes 580 can be supplied with drilling fluid via an flanged block 582, which can be connected to a pump (not shown), via an annular gap 583.

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  • 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)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un dispositif de forage, notamment pour forages pilotes, qui comprend une tête de forage (200) approximativement cylindrique pouvant tourner autour de son axe longitudinal au moyen d'un train de tiges (100) et présentant, pour assurer sa commande d'orientation, à son extrémité avant, une surface de commande (37) inclinée par rapport à l'axe du cylindre, surface sur laquelle est disposée au moins une tuyère (38) prévue pour permettre à un liquide de forage sous pression de sortir. Afin de réduire le couple à appliquer et simultanément de permettre un assemblage et un détachement aisés du train de tiges, ledit train de tiges (100) comprend un tube extérieur (1) rigide et un tube intérieur (2) de diamètre plus réduit, pouvant tourner dans le tube extérieur, pour entraîner la tête de forage (200). Un espace intermédiaire (3) est formé entre le tube extérieur (1) et le tube intérieur (2) et le train de tiges (100) comprend plusieurs tubes pilotes (50, 50'). Ce système permet de réduire le couple requis pour faire tourner la tête de forage et le train de tiges, la rotation s'effectuant désormais par l'intermédiaire du tube intérieur qui n'est plus en contact avec le terrain augmentant le frottement.
PCT/EP2002/005139 2001-05-11 2002-05-10 Dispositif de forage WO2002092955A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001123058 DE10123058A1 (de) 2001-05-11 2001-05-11 Erdbohrvorrichtung
DE10123058.3 2001-05-11

Publications (1)

Publication Number Publication Date
WO2002092955A2 true WO2002092955A2 (fr) 2002-11-21

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WO (1) WO2002092955A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236148A (zh) * 2017-05-01 2021-08-10 维米尔制造公司 双杆定向钻井系统
US20220010632A1 (en) * 2020-07-08 2022-01-13 Conocophillips Company Sealed concentric coiled tubing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103195362B (zh) * 2013-03-14 2015-03-25 锦州清华机械有限公司 一体式开窗侧钻工具
DE102015001720A1 (de) * 2015-02-14 2016-08-18 Prime Drilling Gmbh Bohranlage zum Einbringen von Bohrungen in Gestein und Felsen
DE102017010603A1 (de) * 2017-11-16 2019-05-16 Tracto-Technik Gmbh & Co. Kg Gleitlager, Erdbohrvorrichtung, Verfahren zur Herstellung eines Gleitlagers und Verwendung eines Gleitlagers

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4953638A (en) 1988-06-27 1990-09-04 The Charles Machine Works, Inc. Method of and apparatus for drilling a horizontal controlled borehole in the earth

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842181B4 (de) * 1998-09-15 2004-01-29 Bohrtec Gmbh & Co Kg Vorrichtung zur Bildung eines Durchlasses für Rohre im Erdreich

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953638A (en) 1988-06-27 1990-09-04 The Charles Machine Works, Inc. Method of and apparatus for drilling a horizontal controlled borehole in the earth

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236148A (zh) * 2017-05-01 2021-08-10 维米尔制造公司 双杆定向钻井系统
US11808151B2 (en) 2017-05-01 2023-11-07 Vermeer Manufacturing Company Dual rod directional drilling system
US20220010632A1 (en) * 2020-07-08 2022-01-13 Conocophillips Company Sealed concentric coiled tubing
US11867003B2 (en) * 2020-07-08 2024-01-09 Conocophillips Company Sealed concentric coiled tubing

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Publication number Publication date
DE10123058A1 (de) 2002-11-21

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