EP0324870B1 - Tube de trains de tiges autoguidés pour trains de tiges de machines de forage de roche - Google Patents

Tube de trains de tiges autoguidés pour trains de tiges de machines de forage de roche Download PDF

Info

Publication number
EP0324870B1
EP0324870B1 EP88100657A EP88100657A EP0324870B1 EP 0324870 B1 EP0324870 B1 EP 0324870B1 EP 88100657 A EP88100657 A EP 88100657A EP 88100657 A EP88100657 A EP 88100657A EP 0324870 B1 EP0324870 B1 EP 0324870B1
Authority
EP
European Patent Office
Prior art keywords
drilling
drilling shaft
steering
self
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.)
Expired - Lifetime
Application number
EP88100657A
Other languages
German (de)
English (en)
Other versions
EP0324870A1 (fr
Inventor
Martin Wiebe
Heinz Wallussek
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.)
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and Co
Original Assignee
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and Co
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 Bergwerksverband GmbH, Schwing Hydraulik Elektronik GmbH and Co filed Critical Bergwerksverband GmbH
Priority to EP88100657A priority Critical patent/EP0324870B1/fr
Priority to AT88100657T priority patent/ATE65111T1/de
Priority to DE8888100657T priority patent/DE3863640D1/de
Priority to AU28336/89A priority patent/AU616930B2/en
Priority to ZA89251A priority patent/ZA89251B/xx
Priority to US07/297,046 priority patent/US5000272A/en
Priority to BR898900201A priority patent/BR8900201A/pt
Priority to JP1007874A priority patent/JPH01287391A/ja
Publication of EP0324870A1 publication Critical patent/EP0324870A1/fr
Application granted granted Critical
Publication of EP0324870B1 publication Critical patent/EP0324870B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • E21B4/02—Fluid rotary type drives
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
    • 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
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/062—Deflecting the direction of boreholes the tool shaft rotating inside a non-rotating guide travelling with the shaft

Definitions

  • the invention relates to a self-controlling drill pipe for rotating drill pipes according to the preamble of patent claim 1.
  • the self-controlling drill pipe according to the invention is arranged behind the drilling tool and generally in the vicinity thereof. Its inner drilling shaft is connected in a rotationally fixed manner, in particular to the deepest drill pipe and to the drilling tool.
  • a drill head equipped with several roller drill bits serves as the drilling tool.
  • the self-control works immediately behind the free cutting of the drilling tool, whereby the correction of any deviation of the drilling tool from the predefined drilling direction is carried out so quickly that the direction of the drilling practically coincides with the desired direction.
  • the self-control required for this is accommodated with its various systems in the standing housing, which encloses the drilling shaft.
  • the housing On the outside, the housing carries the control strips, which are offset by the same arc angle and pivotally mounted at one end, which, in cooperation with the joint of the borehole, apply the necessary correction forces.
  • the sensors which are designed as inclinometers
  • the system used to drive the control strips which can pivot out the control strips individually in accordance with the respective deviations
  • the control and, if appropriate, special electronics which act on a measured value pressure pulse generator, which transmits data to the drilling rig via the borehole flushing.
  • the stator of a generator that generates the electrical energy for the electronics and electrics is also accommodated in the housing.
  • the chambers are placed one behind the other in radial projections of the standing outer body, which are housed behind the rod-side end mounted and connected to the travel limiter end of the housing connected to the travel limiter.
  • the rotating drill pipe with which the self-controlling drill pipe according to the invention is used, is driven by a drill motor installed outside the drill hole.
  • Rotary drilling Working rock drilling machines produce boreholes sunk from top to bottom, in which the borehole flushing serves to discharge the cuttings removed from the borehole bottom with the drilling tool upwards and out of the borehole.
  • Such a flushing can also be operated with water in the device according to the invention with sufficient buoyancy speed in the borehole, but weighted flushing fluids which generate additional buoyancy and are known for this purpose are known as a gel or as a slurry with tixotropic properties, for example when bentonite is applied.
  • the device according to the invention can also be used for such bores, provided that rinsing liquids are used here, for example, to cool the cutting edges.
  • the borehole slurry flowing in the area between the pipe string and the borehole joint can be used for the transmission of measured values.
  • Part of the electrical system then serves to hydraulically control the pressure pulse generator, which is mounted in the shaft and changes the cross section of the flushing channel.
  • the hydraulic Control of the encoder can be installed in the outer body.
  • the invention is based on a known self-controlling drill pipe of the type described at the beginning (magazine Johnsonauf 120 (1984) No. 13, pp. 819,822).
  • one of the chambers mentioned serves as a tank for the hydraulic working fluid of the hydraulic pumps consisting of oil for the pistons accommodated in the linkage behind each control bar.
  • the pumps represent the system's pressure generators and are mechanical, ie driven by an eccentric of the drilling shaft.
  • the hydraulic control of the pressure pulse generator requires a series of rotary unions of the drilling shaft in the housing, which are provided with soft seals sealed on the drilling shaft, which seal the working fluid of the hydraulic system, which is under a system pressure of, for example, 100 bar.
  • the radial bearings of the drilling shaft are located at the ends of the housing and are supplemented by an axial bearing which is arranged behind the radial bearing on the drilling tool side in the housing.
  • These drilling shaft bearings are designed as roller bearings in order to achieve a smooth shaft in the housing.
  • rotary seals are attached to the front of the housing, which separate the bearing lubrication from the borehole slurry and relieve the soft seals.
  • the described construction of these seals is complex and prone to failure due to the large number of their components.
  • the sealing pressure of the rotary seals is not sufficient for the high pressures of the borehole flushing, as are encountered in deep boreholes that have to be sunk over several hundred or even a thousand meters.
  • the sealing rings of the rotary bearings must be insulated. Nevertheless, even at low depths, a wedge of lubricant forms between these surfaces of the rotary seals that rub against each other. Even with the most careful storage, the drilling shaft and the housing execute radial movements, which also act on the surfaces of the rotary seals, which are sealed and lubricated.
  • the invention has for its object to simplify the structure of the self-control in a self-controlling drill pipe with the features explained above and to ensure that regardless of the pressure of the borehole flushing and thus of the depths drilled holes, the service life of the parts important for the system anyway turns out large that it is not less than the service life of the drilling tools.
  • the hydraulic differential pressure which prevails between the drill pipe rinsing in the rinsing channel of the drilling shaft and the borehole rinsing at the respective end of the housing is used as a working medium of the hydraulic system by branching off a partial flow of the rinsing liquid which is largely free of the drilling cuttings and which flows in to prevent contaminated flushing liquid from the borehole into the housing.
  • This differential pressure namely creates a pressure gradient from the annulus into the borehole so that no cuttings can flow back.
  • this pressure drop is relatively small, so that there are also small pressure differences in front of and behind the check valves separating the clean drilling fluid from the contaminated drilling fluid, which considerably simplifies the construction of such valves.
  • the invention uses the relatively clean drill pipe drilling as a working fluid hydraulic system of self-control, which u. a. does the necessary work in the drives of the control strips.
  • This enables self-control to be achieved with a simplified hydraulic system, even for very deep bores with correspondingly high hydraulic pressures.
  • the rotary unions described are namely outside under the high hydraulic pressure of the flushing and inside under the system pressure, so that low differential pressures result in deep bores and the soft seals can also be used for this.
  • the check valves mainly act as dirt deflectors on the cuttings of the borehole slurry.
  • the clean drill pipe flushing is used for the drive of the pulse generator, but generates the required pressure with a pump mechanically derived from the drill pipe. Thereby it is possible to shape the pulses representing the measured values in such a way that they can be read without error by a differential pressure sensor at the mouth of the borehole.
  • the check valves which are required at the ends of the housing or the annular space, can be constructed relatively easily.
  • their valve body is formed by a metal ring housed in a standing housing in the groove, which is preloaded, for example, with an annular spring arrangement in the direction of the valve seat, which is axially immovably housed in a groove of the drilling shaft or a drilling shaft flange.
  • metal rings are known as seals and for rough operating conditions suitable, such as occur in construction. They are particularly useful as check valves for the purposes of the invention, because their spring force is increased by the external pressure of the drilling fluid and because the pressure gradient directed from the inside out ensures that no abrasive particles of the cuttings can get between the mutually projecting surfaces of the metal rings .
  • the self-controlling drill pipe is provided with a drilling shaft (2) which is screwed to the end of the last drill pipe of a rotating pipe rod via a threaded head (3), which is common in drill pipes of rotary drilling rigs can be.
  • the drilling shaft (2) has a rinsing channel (4) which extends to the other shaft end (5) with an enlarged diameter, which, with its internal thread (6), receives the threaded pin of a drilling tool, not shown, which consists of several tapered rollers fitted with hard metal chisels consists.
  • the drilling shaft is surrounded by a housing (10).
  • a housing (10) On the outside of the housing are U-shaped profiled control bars (11-14), each offset by a quarter circle, with their angled web ends, as shown at (15) in Fig. 1, pivotally mounted.
  • the housing has projections (16-19) enclosed by the U-profiles of the control strips (11-14), in which chambers are recessed.
  • the control electronics of the self-control is housed protected.
  • Chamber (22) of the drive piston assigned to each control strip is guided.
  • the rotor of a generator (22) generating the electrical energy is connected in a rotationally fixed manner to the drilling shaft (2) and works in a stator which is arranged in a rotationally fixed manner in the housing.
  • a hydraulic pump is housed in the chamber shown at (24), while a hydraulic pulse generator is indicated at (25).
  • control bars (11-14) are swiveled out in accordance with the signals coming from the inclinometers at (21) and thereby hold the drill pipe (1) in the specified drilling direction.
  • the electronics convert the measured values into electrical or hydraulic signals, which are implemented by the directional control valves of the hydraulic system or recorded by the pulse generator. This changes the cross-section of the flushing channel and thus generates differential pressures in the drill pipe drilling, which are read at the mouth of the borehole and converted into digital values.
  • annular space (26) surrounding the drilling shaft (2) is formed between the drilling shaft (2) and the housing (10). It is connected to the drill pipe flushing by means of a radial shaft bore (27) which extends from the annular space into the flushing channel (4) of the drilling shaft (2).
  • the annular space is sealed with a rotary check valve (28, 29) against the drilling fluid (30) flowing between the housing (10) and the borehole joint (29).
  • the borehole mud contains particles released from the drilling tool, not shown in FIG. 3.
  • Between the two rotary seals (28 and 29) are the radial bearings of the drilling shaft (2), shown schematically at (31 and 32).
  • the axial bearing usually provided is not shown in the illustration in FIG. 3 for reasons of simplification.
  • the dirt filter (33) built into the radial bore (7) is shown next to the bore to show the hydraulic system.
  • a hydraulic pump In the hydraulic system of self-control, a hydraulic pump is assigned to each bar. It is driven by an eccentric (34) which is fixed in a rotationally fixed manner on the drilling shaft (2) and acts on a pump piston (36) via a self-bearing ring (35). A radial bore (37) connects the pressure chamber of the pump cylinder with the annular space (26), in which the clean drill pipe flushing is applied. Check valves (37, 38) secure the pressure chamber of the pump.
  • the pump acts on an electrically controlled, spring-loaded 2/3-way valve (39) via which the drive piston mentioned in connection with FIG. 1 acts which opposing control strips are assigned as rotary actuators and are designated by (40 and 41).
  • the hydrostatic system is secured by a bypass line (42) secured by a check valve.
  • the pulse generator (25) is shown as a double piston, which is mounted in the drilling shaft (2) in a radially movable manner.
  • the soft seals of the rotary unions (43-45) serve to secure the two hydraulic lines (46 and 47) which act on the piston of the pulse generator. This is done via a 2/3-way valve (48) corresponding to the valve (39), which is acted upon by a spring pressure accumulator (49) with the clean flushing liquid, which is supplied by the hydraulic pressure generator via a branch line (50) and a pressure relief valve (51) is acted upon.
  • the check valves (28, 29) are of uniform design. According to the enlarged representation in FIG. 1, they are each in a radial gap (53, 54) between the end face (55, 56) of the housing (10) and a collar (58, 59) of the drilling shaft (2).
  • Each valve is realized with an axially preloaded slide ring (66), which is seated in a bore (64) in a bore (64) Groove (61) of the housing (10) is housed.
  • the mutually projecting surfaces of the rings serve as dirt repellants because of the pressure gradient directed from the inside outwards. Due to the wedge shape of the sealing gap, the area ratios of the rings are selected so that the ring areas are lifted off one another from the internal pressure which prevails in the annular space as soon as the internal pressure is greater than the external pressure. Therefore drill pipe flushing can overcome the ring surfaces from the outside, but the backflow is excluded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Acoustics & Sound (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling And Boring (AREA)

Claims (5)

  1. Tube de trains de tiges autoguidé pour train de tiges de forage rotatif de machines de forage de roche, qui comprend un arbre de forage interne (2) pouvant être relié au train de tiges et à l'outil de forage (7), comportant un canal de lavage (4) et un boîtier (10) monté à rotation autour de l'arbre de forage (2), boîtier sur lequel sont montées des barres de guidage (11-14) pouvant pivoter vers l'extérieur et dans lequel les parties des dispositifs d'entraînement hydrostatiques (40, 41) agissant sur les barres de guidage ainsi que l'électronique de commande (20) et le système électrique (23) sont disposées, le besoin en énergie étant obtenu par le mouvement rotatif pendant le processus de forage, caractérisé en ce qu'entre l'arbre de forage (2) et le boîtier (10) est prévue une chambre annulaire (11) qui comprend une liaison radiale (27) avec le canal de lavage (4) de l'arbre de forage (2) et qui est raccordé aux deux extrémités respectivement à un clapet de non-retour tournant (28, 29) le rendant étanche par rapport au liquide de lavage du trou de forage et en ce que l'espace annulaire (26) sert de réservoir pour le liquide de travail du système hydraulique constitué par le liquide de lavage de l'arbre de forage.
  2. Train de tiges autoguidé selon la revendication 1, caractérisé en ce qu'il comprend un générateur d'impulsions de pression (25) et en ce que le liquide de lavage du train de tiges sert d'agent de travail hydraulique pour le générateur d'impulsions de pression (25), la pression de travail hydraulique étant dérivée du système hydraulique pour faire pivoter les barres de guidage (11-14) vers l'extérieur.
  3. Train de tiges autoguidé selon l'une des revendications 1 ou 2, caractérisé en ce que la liaison radiale (27) est constituée par un alésage (27) parvenant jusqu'au canal de lavage, dans lequel est incorporé un filtre (33) qui est soumis à l'action du liquide de lavage le long du canal de lavage (4) de l'arbre de forage (2).
  4. Train de tiges autoguidé selon l'une des revendications 1 à 3, caractérisé en ce que les clapets de non-retour (28, 29) sont montés aux extrémités du tube extérieur respectivement dans un interstice radial (53, 54) entre les surfaces frontales (55, 56) du boîtier (10) et une collerette (58, 59) de l'arbre de forage (2), le clapet étant constitué par un anneau coulissant soumis à une précontrainte (60) et monté dans une rainure (61) du boîtier (10), et le siège de soupape étant constitué par les surfaces annulaires (62) d'un anneau métallique (63) fixe en direction axiale et monté dans la collerette (58, 59) de l'arbre de forage (2).
  5. Train de tiges autoguidé selon l'une des revendications 1 à 4, caractérisé en ce que le générateur d'impulsions (25) est soumis à l'action d'un accumulateur de pression (49) par un passage tournant muni de garnitures molles (43-45), accumulateur qui est soumis à l'action d'un générateur de pression hydraulique (36).
EP88100657A 1988-01-19 1988-01-19 Tube de trains de tiges autoguidés pour trains de tiges de machines de forage de roche Expired - Lifetime EP0324870B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP88100657A EP0324870B1 (fr) 1988-01-19 1988-01-19 Tube de trains de tiges autoguidés pour trains de tiges de machines de forage de roche
AT88100657T ATE65111T1 (de) 1988-01-19 1988-01-19 Selbststeuerndes gestaengerohr fuer rotierende bohrgestaenge von gesteinsbohrmaschinen.
DE8888100657T DE3863640D1 (de) 1988-01-19 1988-01-19 Selbststeuerndes gestaengerohr fuer rotierende bohrgestaenge von gesteinsbohrmaschinen.
AU28336/89A AU616930B2 (en) 1988-01-19 1989-01-10 A self-controlling drill rod
ZA89251A ZA89251B (en) 1988-01-19 1989-01-12 A self-controlling drill rod
US07/297,046 US5000272A (en) 1988-01-19 1989-01-17 Self-controlling drill rod
BR898900201A BR8900201A (pt) 1988-01-19 1989-01-18 Tubo de hastes automaticos para hastes de perfuracao rotativas de maquinas perfuradoras de rochas
JP1007874A JPH01287391A (ja) 1988-01-19 1989-01-18 自己制御性ドリルロッド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88100657A EP0324870B1 (fr) 1988-01-19 1988-01-19 Tube de trains de tiges autoguidés pour trains de tiges de machines de forage de roche

Publications (2)

Publication Number Publication Date
EP0324870A1 EP0324870A1 (fr) 1989-07-26
EP0324870B1 true EP0324870B1 (fr) 1991-07-10

Family

ID=8198656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100657A Expired - Lifetime EP0324870B1 (fr) 1988-01-19 1988-01-19 Tube de trains de tiges autoguidés pour trains de tiges de machines de forage de roche

Country Status (8)

Country Link
US (1) US5000272A (fr)
EP (1) EP0324870B1 (fr)
JP (1) JPH01287391A (fr)
AT (1) ATE65111T1 (fr)
AU (1) AU616930B2 (fr)
BR (1) BR8900201A (fr)
DE (1) DE3863640D1 (fr)
ZA (1) ZA89251B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4037259A1 (de) * 1990-11-23 1992-05-27 Schwing Hydraulik Elektronik Zielbohrstange mit eigener elektrischer energieversorgung durch einen eingebauten generator

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4017761A1 (de) * 1990-06-01 1991-12-05 Eastman Christensen Co Bohrwerkzeug zum abteufen von bohrungen in unterirdische gesteinsformationen
DE4037261A1 (de) * 1990-11-23 1992-05-27 Schwing Hydraulik Elektronik Zielbohrstange mit einer rohrwellenlagerung
US5553678A (en) * 1991-08-30 1996-09-10 Camco International Inc. Modulated bias units for steerable rotary drilling systems
GB9204910D0 (en) * 1992-03-05 1992-04-22 Ledge 101 Ltd Downhole tool
US6050350A (en) * 1997-05-12 2000-04-18 Morris; Waldo Underground directional drilling steering tool
GB9902023D0 (en) * 1999-01-30 1999-03-17 Pacitti Paolo Directionally-controlled eccentric
WO2001034935A1 (fr) 1999-11-10 2001-05-17 Schlumberger Holdings Limited Procede de commande pour systeme de forage orientable
AU9299801A (en) 2000-09-22 2002-04-02 Ingersoll Rand Co Quick release drill bit for down-hole drills
US6962214B2 (en) 2001-04-02 2005-11-08 Schlumberger Wcp Ltd. Rotary seal for directional drilling tools
US7188685B2 (en) * 2001-12-19 2007-03-13 Schlumberge Technology Corporation Hybrid rotary steerable system
US6698535B1 (en) 2002-04-30 2004-03-02 Waldo Morris Floating offset transmitter housing underground directional drilling tool
US7267184B2 (en) * 2003-06-17 2007-09-11 Noble Drilling Services Inc. Modular housing for a rotary steerable tool
US9771793B2 (en) 2009-07-08 2017-09-26 Halliburton Manufacturing And Services Limited Downhole apparatus, device, assembly and method
GB0911844D0 (en) 2009-07-08 2009-08-19 Fraser Simon B Downhole apparatus, device, assembly and method
EP2845995A1 (fr) 2013-09-10 2015-03-11 Welltec A/S Outil de forage
WO2018136080A1 (fr) * 2017-01-20 2018-07-26 Halliburton Energy Services, Inc. Génération d'énergie en fond de trou et outil de forage directionnel
CN109138829A (zh) * 2017-06-28 2019-01-04 盐城市新永佳石油机械制造有限公司 一种可自动降温的螺杆钻具

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2316409A (en) * 1941-12-05 1943-04-13 Lloyd R Downing Oil well straightener
US3005507A (en) * 1957-09-30 1961-10-24 Houston Oil Field Mat Co Inc Fluid by-pass for rotary drill bits
GB867025A (en) * 1958-11-19 1961-05-03 British Petroleum Co Improvements relating to borehole drilling
US3062303A (en) * 1960-03-21 1962-11-06 Shell Oil Co Method and apparatus for controlling hole direction and inclination
US3196959A (en) * 1961-08-14 1965-07-27 Lamphere Jean K Directional drilling apparatus
US3595326A (en) * 1970-02-03 1971-07-27 Schlumberger Technology Corp Directional drilling apparatus
DE2016952A1 (de) * 1970-04-09 1971-10-21 Gräfer, Albrecht. Dipl.-Berging. Dr.-Ing. e.h., 4322 Sprockhövel Bohrwerkzeugführung
SU438771A1 (ru) * 1973-04-09 1974-08-05 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Буровой Техники Торцовое уплотнение забойного двигател
US4040494A (en) * 1975-06-09 1977-08-09 Smith International, Inc. Drill director
DE3046122C2 (de) * 1980-12-06 1984-05-17 Bergwerksverband Gmbh, 4300 Essen Einrichtungen zur Herstellung zielgerichteter Bohrungen mit einer Zielbohrstange
DE3325962A1 (de) * 1983-07-19 1985-01-31 Bergwerksverband Gmbh, 4300 Essen Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb
US4947944A (en) * 1987-06-16 1990-08-14 Preussag Aktiengesellschaft Device for steering a drilling tool and/or drill string

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4037259A1 (de) * 1990-11-23 1992-05-27 Schwing Hydraulik Elektronik Zielbohrstange mit eigener elektrischer energieversorgung durch einen eingebauten generator

Also Published As

Publication number Publication date
ATE65111T1 (de) 1991-07-15
JPH01287391A (ja) 1989-11-20
AU2833689A (en) 1989-07-20
BR8900201A (pt) 1989-09-12
ZA89251B (en) 1989-10-25
EP0324870A1 (fr) 1989-07-26
AU616930B2 (en) 1991-11-14
US5000272A (en) 1991-03-19
DE3863640D1 (de) 1991-08-14

Similar Documents

Publication Publication Date Title
EP0324870B1 (fr) Tube de trains de tiges autoguidés pour trains de tiges de machines de forage de roche
DE2233324C3 (de) Vorrichtung zur Bohrlochmessung während der Bohrung
DE3511916A1 (de) Drehbetaetigtes schieberventil fuer bohrfluessigkeits-fernuebertragungssysteme
DE2822512C2 (fr)
DE2919007C2 (de) Kernbohreinrichtung für Gesteinsbohrlöcher
DE2824441C2 (de) Erdbohrer
EP1491716A2 (fr) Méthode de forage et outil de forage humide
DE102006059171B3 (de) Bohrvorrichtung und Verfahren zum Erstellen einer Bohrung im Erdboden
DE19906687A1 (de) Doppelkopfbohrvorrichtung kurzer Bauart
DE3439268C2 (fr)
DE60207109T2 (de) Flüssigkeitsgetriebene bohrloch-bohrmaschine
DE3127969A1 (de) Abgedichtetes lagersystem fuer hydraulisch betaetigte vorrichtung
EP2334874B1 (fr) Dispositif et procédé d'activation ou de nettoyage de puits
DE19621849C2 (de) Einrichtung zum Indrehungversetzen und axialen Bewegen von Bohrrohrsträngen
DE4037261C2 (fr)
DE2924392C2 (de) Bohrvorrichtung zum Überlagerungsbohren
DE102010010036B4 (de) Bohrvorrichtung mit Dichtungsanordnung und Verfahren zum Betrieb einer Bohrantriebseinheit
EP1649128B1 (fr) Dispositif pour forer un trou dans la terre
DE19718573C2 (de) Bohrverfahren und Bohrkopf
DE19749409A1 (de) Bohrverfahren und Bohrkopf
DE2418771C3 (de) Turbobohrer
DE102011052182B4 (de) Vorrichtung zur Herstellung eines Erdlochs
WO1996003570A1 (fr) Bouclier
EP0220318A1 (fr) Moteur a vis pour fond de puits
DE3343565A1 (de) Tieflochhammer

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19881231

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR LI LU SE

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH DE FR GB LI SE

17Q First examination report despatched

Effective date: 19901025

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB LI SE

REF Corresponds to:

Ref document number: 65111

Country of ref document: AT

Date of ref document: 19910715

Kind code of ref document: T

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3863640

Country of ref document: DE

Date of ref document: 19910814

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930122

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930126

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930204

Year of fee payment: 6

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19931217

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931231

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940107

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940131

Ref country code: CH

Effective date: 19940131

Ref country code: BE

Effective date: 19940131

BERE Be: lapsed

Owner name: BERGWERKSVERBAND G.M.B.H.

Effective date: 19940131

Owner name: SCHWING HYDRAULIK ELEKTRONIK G.M.B.H. & CO.

Effective date: 19940131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950119

EUG Se: european patent has lapsed

Ref document number: 88100657.1

Effective date: 19940810

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950929

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970320

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981001