EP0792995A1 - Procédé de guidage d'un dispositif de forage du sol - Google Patents

Procédé de guidage d'un dispositif de forage du sol Download PDF

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Publication number
EP0792995A1
EP0792995A1 EP97101672A EP97101672A EP0792995A1 EP 0792995 A1 EP0792995 A1 EP 0792995A1 EP 97101672 A EP97101672 A EP 97101672A EP 97101672 A EP97101672 A EP 97101672A EP 0792995 A1 EP0792995 A1 EP 0792995A1
Authority
EP
European Patent Office
Prior art keywords
drill
steering
drill head
head
liquid
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.)
Withdrawn
Application number
EP97101672A
Other languages
German (de)
English (en)
Inventor
Franz-Josef Püttmann
Alfons Hesse
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.)
Tracto Technik GmbH and Co KG
Original Assignee
Tracto Technik GmbH and Co KG
Tracto Technik Paul Schmidt Spezialmaschinen KG
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 Tracto Technik GmbH and Co KG, Tracto Technik Paul Schmidt Spezialmaschinen KG filed Critical Tracto Technik GmbH and Co KG
Publication of EP0792995A1 publication Critical patent/EP0792995A1/fr
Withdrawn legal-status Critical Current

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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/065—Deflecting the direction of boreholes using oriented fluid jets
    • 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
    • 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
    • E21B7/064—Deflecting the direction of boreholes specially adapted drill bits therefor
    • 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
    • E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor

Definitions

  • the invention relates to a method for steering an earth drilling device, in particular a drill string rotating and pushing in the ground and optionally striking with a drill head.
  • the drilling head has an inclined surface which causes the device to deflect when the rotation of the drilling head is interrupted.
  • a transmitter for example powered by batteries, is arranged in the drill head and is provided with measuring devices that make it possible to measure the depth of the drill head and where it is located in the ground how the inclination of the drill head and how the roll of the drill head with respect to its axis, ie the angular position of the inclined surface with respect to the longitudinal axis.
  • the temperature of the drill head can also be determined.
  • the measured data is transmitted from the transmitter located in the drill head to a receiver on the surface of the earth and displayed there. From there, the data is sent wirelessly to the operator at a turning and feed unit and is also displayed there.
  • a steering maneuver can be triggered on the basis of this data, for example by interrupting the rotation of the drill pipe in a certain angular position of the inclined surface, which corresponds to the position in which the change in direction is to take place. In this position, the drill pipe with the drill head is then only moved translationally (pushed or struck), so that a lateral force is generated by the inclined surface, which causes a steering movement.
  • FIG. 1 shows how a steering maneuver proceeds in a conventional manner if, for example, the drill pipe is to be guided along a bend in the road with, for example, a 60 m curve radius.
  • a straight bore 1 is to be continued from a point 2 with a predefined curve radius.
  • position 2 the rotation of the drill pipe is interrupted due to a control signal, so that the drill head is deflected in the desired direction during a distance 3, but this deflection corresponds to the maximum possible deflection by the inclined surface on the drill head, so that in a position 4 by a control signal, the rotation of the drill pipe must be resumed, so that now a distance 1 is traversed with a straight bore.
  • the effect of the inclined surface on the drill head neutralized. For this reason, after a certain way, it is necessary again to interrupt the rotation of the drill pipe and to initiate a deflection of the drill pipe again.
  • the invention is based on the problem of creating a method and a device for steering a device which rotates and pushes in the ground and, if appropriate, strikes, with which the disadvantages of the known steering method can be avoided and which permit continuous steering.
  • the solution to this problem is based on the idea that the steering drive, for example of an inclined surface head, should not be allowed to continue for a certain period of time, as in the known methods, but should be reduced to small steering steps or steering impulses. In this way, a steering movement with a rotating steering head, for example an inclined surface head, is possible.
  • one or more direction-changing steering pulses can then always be directed to a rotating one Drill head are brought into effect if the angular position of the drill head with respect to its axis corresponds to the position in which the change in direction is to take place.
  • steering impulses shock or thrust impulses or fluid impulses are suitable if steering nozzles are arranged on the drill head, one or more fluid impulses always being brought into effect when the direction of action of the nozzles corresponds to the position in which the change in direction is to take place.
  • Impact pulses are also suitable as steering impulses if steering elements are arranged on the drill head, one or more impact impulses always being brought into effect on the steering elements when the angular position of the steering elements corresponds to the change in direction.
  • Steering can also be carried out by means of liquid pulses if a drill pipe driven in rotation, pushing and possibly striking is driven with a drill head and liquid nozzles arranged thereon in such a way that if necessary, those from the liquid nozzles escaping liquid jets are always interrupted in regions when the angular position of the drill head with respect to its axis corresponds to the position in which the change in direction is to take place.
  • the individual possibilities of the method according to the invention have in common that the rotation of the drill pipe no longer has to be interrupted for a steering process, so that the thrust by the rotating and feed unit or the blows of an impact device which may be present have a better effect and no static friction can occur . Furthermore, the drill head can no longer get stuck in the bore.
  • the steering process is significantly simplified since, without interrupting the rotation of the drill pipe or the drill head, continuous steering is possible without having to work in steering phases.
  • the course of the bore is continuous even in curves, since in the method according to the invention, if the steering process is effected by means of a striking device, only a few millimeters are pushed in each impact cycle, whereas in the known steering method, several centimeters always have to be advanced without rotating the drill head.
  • the drilling capacity is increased because the rotation of the device or the drilling head does not have to be interrupted when steering.
  • a device for steering a rotating and pushing in the ground by means of a rotating and feed unit as well as, if applicable, a propelled device can have control elements for the percussion device in order to always exert a steering impulse on the steering element, or if the drill pipe is also driven in a percussive manner, interrupt the impact pulses when the angular position of the steering element corresponds to the position in which the change of direction is to take place.
  • the impact device it is possible to have the impact device act directly on the drill head or indirectly via a drill pipe on the drill head.
  • the steering element on the drill head can consist of an inclined surface or of a steering element emerging laterally from the drill head due to impact.
  • the impact device can act directly or indirectly on the steering element via a drill rod, which should produce active forces directed perpendicular to the drill axis in order to deflect the drill head into a curved path.
  • an impact device acting directly on the drill head or the steering element in the drill head this can consist of a pneumatically or hydraulically driven ram boring machine.
  • the drill string can also be designed as a double pipe string, so that the outer drill string can be used for the rotary and feed drive and the inner drill string for transmitting the impact impulses.
  • control elements for the liquid outlet can be provided if the liquid nozzles are arranged asymmetrically on the drill head are, trigger one or more liquid impulses, or, if the liquid nozzles are arranged symmetrically on the drill head, interrupt the liquid outlet from the nozzles in certain areas if the angular position of the drill head corresponds to the position in which the change in direction is to take place.
  • the liquid nozzles can be arranged on one side of the drill head, in particular they can be arranged in the case of an eccentrically acting drill head with an inclined surface on the side of the drill head facing away from the inclined surface.
  • the liquid nozzles can be controlled optionally via controllable valves.
  • the valves can be arranged outside the drill pipe in the area of the turning and feed unit. however, then require multiple fluid lines from the valves to the fluid nozzles. Therefore, the valves in the drill head should be arranged in the vicinity of the liquid nozzles and a collecting line should be led to these valves, and the valves should be controlled via control lines guided through the drill pipe or controlled via the measuring device in the drill head.
  • an earth hole made with the known steering method consists of a straight part 1, which merges into a curved part 3 when in position 2 a control signal is given to a rotating and feeding unit to rotate to interrupt the drill pipe.
  • position 4 the rotation of the drill pipe starts again, so that a straight piece of bore 1 follows again.
  • straight and curved sections of the track always alternate. The smallest theoretically achievable radius is reached when the rotation of the drill pipe is interrupted for a long time, so that a hole with the radius of the bend piece is created.
  • the course of the curve of an earth borehole produced according to the method according to the invention is continuous, for example when a straight borehole 1 in position 2 changes into a curved course 5 which runs with a constant radius until a control signal in position 4 ends the steering process and ends then a straight bore 1 connects again.
  • the curved bore 5 is made while maintaining the rotation of the drill string or the drill head, so that the difficulties associated with the conventional steering method do not occur. Due to the continuous steering process, the method according to the invention is thus much more gentle on the boom.
  • an earth hole is to be drilled in the ground 6 by means of a drill pipe 7 consisting of individual pipes.
  • a drill head 8 At the end of the drill pipe 7 there is a drill head 8 with an inclined surface 9, which is preferably connected to the drill pipe 7 in a rotationally fixed manner.
  • a transmitter 10 is arranged in the drill head 8 and transmits data wirelessly to a receiver 11, which is based on the depth of the drill head below the surface, the location of the drill head 8 in the ground, its inclination, the angular position of the steering surface 9 with respect to the longitudinal axis of the drill head 8 and possibly refer to the temperature at the drill head 8.
  • the radio connection between the transmitter 10 and the receiver 11 is indicated by the dashed line 23.
  • Another radio link 24 transmits the aforementioned data from the receiver 11 to a display device 12 in the vicinity of a striking rotary and feed unit 15 arranged at the start 14.
  • This rotary and feed unit 15 has a rotary drive 16 for the drill pipe 7, which acts on the drill pipe 7 Impact mechanism 17 and a feed drive 18.
  • the drill pipe 7 is coupled to the rotary and feed unit via a drill pipe connection 19.
  • a cable connection leads from the display device 12 to a switch box 13 with an operating panel, by means of which it is possible to control the rotary drive 16, the striking mechanism 17 and the feed drive 18 via a cable connection 21, 22.
  • the device shown in Fig. 2 can be steered in two different ways. If the drill string 7 is driven through the soil 6 in a rotating and pushing manner, a straight bore is created. The deflection of the off-center drilling head 8, which is possible due to the steering surface 9 on the drilling head, is neutralized by the constant rotation of the drill pipe 7. A steering movement can be carried out if the striking mechanism 17 is always activated when the steering surface 9 is in an angular position with respect to the axis of the drill pipe 7, which corresponds to the required direction of deflection.
  • Steering can also be carried out with the device shown in FIG. 2 in such a way that the drill pipe 7 is not only continuously rotating and pushing, but also struck through the soil 6, with the steering surface 9 on the drill head 8 in the critical angular position the impact pulses generated by the striking mechanism 17 are interrupted, since in this case there is also a brief distraction in the desired direction.
  • the device shown in FIG. 3 consists of a rotary and feed unit 25 with a rotary drive 26 and a feed drive 27.
  • the drilling head with the steering surface 9 is directly attached to a striking device 28, preferably in the form of a pneumatically or hydraulically driven ram boring machine, and this impact device 28 is rotatably connected to the drill pipe 7.
  • the transmitter 10 which is connected via a radio link 23 to the receiver 11, of which a radio link 24 is the recorded one Transmits data to the display device 12.
  • the display device 12 is connected via a cable 20 to a switch box 29, which also has a control panel. Cables 21, 22 run from the control box 29 to the rotary drive 26 and to the feed drive 27.
  • an energy supply line 30 is led from the control box 29 through the rotary drive 26 and the drill pipe 7 to the striking device 28.
  • the energy supply line 30 can consist of a hydraulic hose if the striking device 28 consists of a hydraulically operated striking device.
  • a control line 31 runs parallel to the energy supply line 30 and can be used to activate and switch off the impact device 28 in the manner described.
  • the drill head 8 can be steered in the same manner as was described with regard to the embodiment shown in FIG. 2.
  • a drill head 32 shown in FIG. 4 has at its front end a drill bit 33 which is particularly suitable for crushing rock.
  • Liquid nozzles 34 on the drill head 32 serve to improve the soil degradation of the drill head during the drilling process and the steering process, to remove the removed material and to cool the drill head.
  • a steering element 35 is arranged, which can be moved with a wedge surface 37 on a wedge surface 36 of the drill head 32 so that a lateral Projection 39 emerges from the drill head 32.
  • the steering element 35 is connected to an inner rod 38 guided in the drill rod 7.
  • This inner linkage 38 is acted upon in the area of the rotating and feed unit 15 by the striking mechanism 17 and / or a feed drive when a steering process is to be triggered.
  • the steering element 35 temporarily emerges laterally from the drilling head 32 (shown in dashed lines) and in this way produces a steering impulse, similarly to what is caused by the steering surface 9 on the drilling head 8 in FIGS. 2 and 3.
  • the laterally emerging steering projection 39 is only effective in the angular position of the drill head 32 in which a steering movement is to take place. Conversely, it is also possible to retract a steering projection located outside in a certain angular position.
  • an impact device can also act on the drill head 32 in order to improve the degradation effect of the drill bit 33; it is also possible to arrange a striking device directly on the drilling head 32, or to arrange a ram boring machine in the area of the drilling head 32 for actuating the steering element 35 and the striking mechanism 17 on the rotating and feed unit 15 in FIG. 2 for striking the drilling bit 33 via the Use drill pipe 7.
  • an angle sensor 40 is shown, which is designed in the manner of a clock face for a clear representation of the angular position of the steering elements. If a trigger 48 on the angle transmitter 40 is set to the desired angular position (time), the in 2 to 4 described impact devices only driven in this angular position and cause a corresponding steering movement.
  • a rotating and pushing driven drill head 42 has an inclined surface 43 and liquid nozzles 44 arranged on the side of the drill head 42 facing away from the inclined surface 43. These liquid nozzles 44 are supplied with a liquid under high pressure via a liquid line 45 . If the hydraulic fluid is always supplied when a steering pulse is required, or if the supply is interrupted for a short time in a certain angular position of the drill head 42, this results in a steering pulse with which the radius of the bore can be adjusted.
  • the embodiment according to FIG. 7 differs from that according to FIG. 6 only in the liquid nozzles 48 which are not arranged at right angles but rather at an angle with respect to the longitudinal axis of the drill head 46, of which a liquid nozzle is arranged on the inclined surface 47.
  • the drill head 49 shown in FIG. 8 is provided with a centrally acting drill bit 50, and a row of steering nozzles 51 is arranged in the drill bit 50 and in the lateral surface of the drill head 49.
  • a steering pulse is generated either by applying liquid to the nozzles 51 in a specific angular position of the drill head 49 or by interrupting the supply of liquid in a specific one Angular position causes when the liquid nozzles 51 are continuously exposed to liquid.
  • liquid nozzles 54 are distributed uniformly on the circumference of a drill head 52 with a conical tip 53.
  • Several liquid nozzles 54 aligned in the longitudinal direction of the drill head 52 are each connected to a remote-controlled valve 56 via a line 55.
  • a manifold 57 leads to a rotary and feed unit.
  • Each of the remote-controlled valves 56 is connected via a control line (not shown) to the control device of the rotary and feed unit, so that a row of liquid nozzles 54 can be controlled in the sense of a liquid application or an interruption of the liquid application when a steering movement should be triggered.
  • there are steering impulses not only as in the embodiments according to FIGS. 1 to 8 with one revolution or less of the drill pipe, but a steering impulse can be triggered each time a number of liquid nozzles 54 assume the correct angular position. In this way, a particularly sensitive steering of the drill pipe is possible.
  • both nozzles can be arranged on the drill head which are constantly acted upon by liquid, which are thus neutral with regard to the steering behavior, and additional nozzles can cause the liquid impulse for steering.
  • the nozzles can be supplied with liquid via different pipes, eg the neutral nozzles via an outer drill pipe and the steering nozzles via an inner drill pipe.
  • the pressure pulse can also be caused in that a remote-controlled, pulse-like cross-sectional narrowing of the liquid nozzles is brought about.
  • Electromagnetic switching valves are used to actuate the striking tool 17 on the rotary and feed unit 15 or the ram boring machine 28 and to act on the liquid nozzles.
  • a mechanically driven cam trigger which is connected to the drill pipe connection 19 in the rotating and feed unit 15 or 25.
  • Such a cam trigger can actuate a switch for the striking mechanism 17 or the striking device 28 at a predetermined angular position.
  • a cam trigger can also be attached to the front of the drill head if the striking mechanism is located at the front of the drill pipe. Since there is a certain delay between the time of measuring the angular position of the drill head and the effect of the steering pulse, it is advantageous if the control is set up so that the pulse transit time is taken into account.
  • the angular position of the drill head is not determined by a transmitter 10, but is recorded by an encoder on the drill pipe connection 19.
  • the torsion of the drill pipe 7, which results from the rotational resistance of the drill head and the friction of the drill pipe 7 in the bore are taken into account with a corresponding length of the drill pipe 7.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP97101672A 1996-02-27 1997-02-04 Procédé de guidage d'un dispositif de forage du sol Withdrawn EP0792995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607365 1996-02-27
DE19607365A DE19607365C5 (de) 1996-02-27 1996-02-27 Verfahren zum Lenken eines Erdbohrgeräts und ein lenkbares Gerät zum Herstellen einer Erdbohrung

Publications (1)

Publication Number Publication Date
EP0792995A1 true EP0792995A1 (fr) 1997-09-03

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EP97101672A Withdrawn EP0792995A1 (fr) 1996-02-27 1997-02-04 Procédé de guidage d'un dispositif de forage du sol

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US (1) US6012536A (fr)
EP (1) EP0792995A1 (fr)
DE (1) DE19607365C5 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
EP0913523A1 (fr) * 1997-10-28 1999-05-06 FlowTex Technologie GmbH & Co. KG Piste de roulement d'un aéroport thermo-réglable et procédé pour adapter une piste de roulement existante
EP0980461A2 (fr) * 1997-05-08 2000-02-23 Flexidrill Limited Foreuse directionnelle
CN103541658A (zh) * 2013-11-04 2014-01-29 上海隧道工程股份有限公司 一种多孔管水平旋喷钻头

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US20020043404A1 (en) * 1997-06-06 2002-04-18 Robert Trueman Erectable arm assembly for use in boreholes
US5988243A (en) * 1997-07-24 1999-11-23 Black & Decker Inc. Portable work bench
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WO2000055467A1 (fr) 1999-03-03 2000-09-21 Earth Tool Company, L.L.C. Procede et appareil de forage dirige
US6308787B1 (en) * 1999-09-24 2001-10-30 Vermeer Manufacturing Company Real-time control system and method for controlling an underground boring machine
US6315062B1 (en) 1999-09-24 2001-11-13 Vermeer Manufacturing Company Horizontal directional drilling machine employing inertial navigation control system and method
WO2001066900A2 (fr) * 2000-03-03 2001-09-13 Vermeer Manufacturing Company Procede et dispositif de forage dirige dans des conditions mixtes
US6732816B2 (en) 2000-05-03 2004-05-11 Lattice Intellectual Property Limited Method of forming a trenchless flowline
US6871712B2 (en) * 2001-07-18 2005-03-29 The Charles Machine Works, Inc. Remote control for a drilling machine
US6474909B1 (en) * 2000-10-20 2002-11-05 Robert Malek Fluid assisted ground wedging device
EP1213441B1 (fr) * 2000-12-06 2003-06-11 Günter Prof. Dr.-Ing. Klemm Système de forage
DE10122299C2 (de) * 2001-05-08 2003-11-13 Tracto Technik Verfahren zum Felsbohren
EP1300543A1 (fr) * 2001-10-08 2003-04-09 Günter W. Prof. Dr. Klemm Système de forage avec élargisseur
AUPR886401A0 (en) * 2001-11-14 2001-12-06 Cmte Development Limited Fluid drilling head
DE10230450A1 (de) * 2002-07-06 2004-01-22 Tracto-Technik Gmbh Bohrkopf für das Horizontalbohren sowie Herstellungsverfahren für einen Bohrkopf
US6827158B1 (en) 2002-07-31 2004-12-07 The Charles Machine Works, Inc. Two-pipe on-grade directional boring tool and method
AU2002952176A0 (en) 2002-10-18 2002-10-31 Cmte Development Limited Drill head steering
EP1923534B1 (fr) * 2003-09-15 2010-11-10 Baker Hughes Incorporated Ensemble trépan orientable et procédés
US7287604B2 (en) * 2003-09-15 2007-10-30 Baker Hughes Incorporated Steerable bit assembly and methods
US20090133931A1 (en) * 2007-11-27 2009-05-28 Schlumberger Technology Corporation Method and apparatus for hydraulic steering of downhole rotary drilling systems
US9915138B2 (en) 2008-09-25 2018-03-13 Baker Hughes, A Ge Company, Llc Drill bit with hydraulically adjustable axial pad for controlling torsional fluctuations
US7971662B2 (en) * 2008-09-25 2011-07-05 Baker Hughes Incorporated Drill bit with adjustable steering pads
US8205686B2 (en) * 2008-09-25 2012-06-26 Baker Hughes Incorporated Drill bit with adjustable axial pad for controlling torsional fluctuations
US8061455B2 (en) * 2009-02-26 2011-11-22 Baker Hughes Incorporated Drill bit with adjustable cutters
US8196677B2 (en) * 2009-08-04 2012-06-12 Pioneer One, Inc. Horizontal drilling system
US8087479B2 (en) * 2009-08-04 2012-01-03 Baker Hughes Incorporated Drill bit with an adjustable steering device
US20110155466A1 (en) * 2009-12-28 2011-06-30 Halliburton Energy Services, Inc. Varied rpm drill bit steering
US9562394B2 (en) * 2009-12-28 2017-02-07 Halliburton Energy Services, Inc. Timed impact drill bit steering
US20110232970A1 (en) * 2010-03-25 2011-09-29 Halliburton Energy Services, Inc. Coiled tubing percussion drilling
US20180313210A1 (en) * 2017-04-26 2018-11-01 Tracto-Technik Gmbh & Co. Kg Drill head for earth boring, Drilling device for earth boring having the drill head, Method to detect objects while earth boring and Use of a receiver for receiving a radio signal in a drill head for earth boring
GB2561986A (en) * 2017-04-26 2018-10-31 Tracto Technik Paul Schmidt Spezialmaschinen Drill head for earth boring, drilling device for earth boring having the drill head, and method to detect objects while earth boring
GB2564209B (en) * 2017-04-26 2020-02-26 Tracto Technik Drill head comprising a transmitter which transmits a radio signal using a direct digital synthesizer
DE102020005980A1 (de) * 2020-09-30 2022-03-31 Tracto-Technik Gmbh & Co. Kg Steuerbarer Bohrkopf

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EP0204474A1 (fr) * 1985-05-31 1986-12-10 The Analysts International S.A. Procédé et dispositif pour le forage directionnel contrôlé des puits
EP0245971A2 (fr) * 1986-04-18 1987-11-19 Dickinson, Ben Wade Oakes, III Dispositif et procédé pour le forage hydraulique
US4936708A (en) * 1989-10-02 1990-06-26 Perry Robert G Apparatus for directing forward movement of a rod
EP0522446A2 (fr) * 1991-07-05 1993-01-13 TERRA AG fuer Tiefbautechnik Procédé pour contrôler la direction d'un appareil de forage du sol et dispositif pour l'exécution de forages
EP0530045A1 (fr) * 1991-08-30 1993-03-03 Camco Drilling Group Limited Unités de déviation réglables pour systèmes de forage rotatif à déviation dirigeable
DE4305423A1 (de) * 1993-02-22 1994-08-25 Terra Ag Tiefbautechnik Erdbohrgerät
US5449046A (en) * 1993-12-23 1995-09-12 Electric Power Research Institute, Inc. Earth boring tool with continuous rotation impulsed steering
DE4433533C1 (de) * 1994-09-20 1995-11-23 Terra Ag Tiefbautechnik Rammbohrvorrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0980461A2 (fr) * 1997-05-08 2000-02-23 Flexidrill Limited Foreuse directionnelle
EP0980461A4 (fr) * 1997-05-08 2003-01-02 Flexidrill Ltd Foreuse directionnelle
EP0913523A1 (fr) * 1997-10-28 1999-05-06 FlowTex Technologie GmbH & Co. KG Piste de roulement d'un aéroport thermo-réglable et procédé pour adapter une piste de roulement existante
CN103541658A (zh) * 2013-11-04 2014-01-29 上海隧道工程股份有限公司 一种多孔管水平旋喷钻头
CN103541658B (zh) * 2013-11-04 2015-09-09 上海隧道工程股份有限公司 一种多孔管水平旋喷钻头

Also Published As

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DE19607365C5 (de) 2004-07-08
DE19607365C2 (de) 1998-04-16
DE19607365A1 (de) 1997-08-28
US6012536A (en) 2000-01-11

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