EP0392544B1 - Outil de forage - Google Patents

Outil de forage Download PDF

Info

Publication number
EP0392544B1
EP0392544B1 EP90107054A EP90107054A EP0392544B1 EP 0392544 B1 EP0392544 B1 EP 0392544B1 EP 90107054 A EP90107054 A EP 90107054A EP 90107054 A EP90107054 A EP 90107054A EP 0392544 B1 EP0392544 B1 EP 0392544B1
Authority
EP
European Patent Office
Prior art keywords
drilling
pilot
core
drilling tool
outer housing
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
EP90107054A
Other languages
German (de)
English (en)
Other versions
EP0392544A3 (fr
EP0392544A2 (fr
Inventor
Rainer Dr.-Ing. Jürgens
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.)
Baker Hughes Oilfield Operations LLC
Original Assignee
Eastman Teleco 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 Eastman Teleco Co filed Critical Eastman Teleco Co
Publication of EP0392544A2 publication Critical patent/EP0392544A2/fr
Publication of EP0392544A3 publication Critical patent/EP0392544A3/fr
Application granted granted Critical
Publication of EP0392544B1 publication Critical patent/EP0392544B1/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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
    • E21B25/04—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe the core receiver having a core forming cutting edge or element, e.g. punch type core barrels
    • 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

Definitions

  • the invention relates to a drilling tool in an embodiment according to the preamble of claim 1.
  • the deep-hole motor for driving the core tube of the core drilling unit is designed as a Moineau motor and is an integral part of the core drilling unit.
  • the stator of the deep hole motor is non-rotatably but axially displaceably supported in the longitudinal guides of the outer housing, and the core tube of the core drilling unit is rotatably mounted in the lower end region of the stator of the deep hole motor and connected to the output shaft of the deep hole motor.
  • a similar drilling tool is illustrated in US Pat. No. 4,518,050, in which a turbine forming part of the wind-up core drilling unit is provided as a deep hole motor.
  • the invention has for its object to provide a drilling tool, the pilot drilling unit can be driven with particularly high performance.
  • the invention achieves this object by means of a drilling tool with the features of claim 1. With regard to further configurations, reference is made to claims 2 to 5.
  • the inventive design of the drilling tool creates an extraordinarily simple pilot drilling unit, which consists practically only of a tubular body with a safety device attached directly to its upper end and, if appropriate, in the lower part of the freely rotatable inner tube.
  • the turbine assigned to the outer housing of the drilling tool can be designed with a significantly larger diameter and can be designed for significantly higher powers and speeds, so that the pilot drilling tool according to the invention is particularly suitable for core drilling work in hard rock.
  • the drilling tool shown comprises in detail a tubular outer housing 1, which can be connected at its upper end to a drill pipe string by means of connecting means, in particular a screw thread, which in a known manner by means of an above-ground drive, e.g. of the rotary table of a drilling rig, can be driven, but instead can also be stopped and locked in a predetermined alignment position against revolutions.
  • connecting means in particular a screw thread
  • the outer housing 1 can carry a drill bit 2, which can have any known or suitable design.
  • This core bit 2 can also be omitted in special cases, namely if - to re-drill the borehole from the diameter of a pilot hole drilled to the main hole diameter - a special drilling tool, e.g. a solid drilling tool, a solid drilling tool with vertical drilling characteristics or the like is used, or drilling operations are omitted, as is the case e.g. may be the case with seabed exploration.
  • the drilling tool shown further comprises as a pilot drilling unit a core drilling unit 3, which by means of one on it Arranged upper end safety device 4 from the outer housing 1 and removable in this and axially displaceable during the core drilling operation.
  • the core drilling unit 3 has reaction surfaces 5 which can be acted upon by the drilling fluid during the core drilling operation in order to generate an axial feed force acting on the core drilling unit in the bottom direction of the bore and comprises a core tube 6 and a lower extension of the core tube 6 by means of a bearing device 8 about the longitudinal central axis 9 of the Drilling tool freely rotatable inner tube 7 for receiving a drilled core.
  • the core tube 6 has its own drill bit 10 at its lower end and has an axial flow channel 11 which merges into branches 12 above the bearing device 8 and opens into a flow gap 13 between the core tube 6 and the inner tube 7.
  • a check valve 15 At the upper end of the core receiving space 14 in the inner tube 7, this is provided with a check valve 15, which opens when the core drilling unit 3 is moved into a borehole and permits an upward flow of drilling fluid contained in the drill pipe string and in the drilling tool.
  • the pilot drilling unit 3 can also have a tubular body which is designed as a carrier of a solid rotary drilling tool and is provided with the catching device 4 and which can optionally be used for a core tube design, e.g. for alternating full and core drilling work.
  • the drilling tool further comprises a drilling fluid operated deep hole motor which is designed as a drilling fluid operated turbine 16.
  • the outer housing 1 forms the stator and a tubular inner housing 17, which is rotatably mounted in the outer housing 1 and is axially fixedly supported thereby, the rotor of the turbine 16.
  • the inner housing 17 forming the rotor of the turbine 16 is on its inside with axially aligned longitudinal guides 18 provided by which the core drilling unit is axially displaceably supported during operation.
  • the longitudinal guides 18, which are preferably formed by a multi-groove profile, are in the circumferential direction in driving engagement with wedge areas 19 at the upper end of the core tube 6, so that when the turbine 16 is in operation it drives the core tube 6 directly.
  • extension tube bodies can be inserted into the tube body below its engagement region 19 with the inner housing 17 in order to enlarge the pilot drilling distance.
  • the turbine 16 can be designed with a relatively large diameter and can accordingly be designed for particularly high powers and speeds.
  • the outer casing 1 can be stopped or at the same time make a self-rotation by means of the above-ground drive via the drill pipe string. In this way it is possible in suitable formations to start drilling the borehole shortly after the start of a pilot core drilling and before its completion.
  • pilot core bores after drilling a core, the core drilling unit 3, including the core located in the receiving space 14 of the inner tube 7, is drawn in and, after the core has been removed from the surface, retracted and placed in the inner housing 17 of the drilling tool which forms the inner rotor of the turbine 16.
  • the pilot core hole can be drilled through to the bottom of the pilot core hole.
  • the assignment of the turbine to the outer casing is also in cases in which it is not necessary to drill pilot holes, for example when examining seabeds, in which the outer casing 1 is used without its own drill bit and can be placed with its lower end on the seabed 1 for performance reasons, but also important for reasons of a low-level drive for the pilot drilling unit, to a certain extent in the sense of a rotary table placed close to the bottom of the drill hole, particularly in the case of greater water depths and pilot drill strings of considerable length formed by extensions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Claims (5)

  1. Outil de forage, comportant un boîtier extérieur (1) tubulaire, qui peut être relié, à son extrémité supérieure, par des moyens de raccordement, avec une ligne de tubes de forage et à son extrémité inférieure, avec une couronne de forage (2), comportant une unité de forage pilote (3), qui peut être tirée hors du boîtier extérieur (1) au moyen d'un dispositif de prise (4) et peut être déposée dans ce boîtier ainsi que coulissée axialement dans celui-ci pendant le forage, et comportant un moteur pour trou profond (16) fonctionnant avec jet de forage, l'unité de forage pilote (3) étant soutenue dans des glissières longitudinales (18) de manière à ne pouvoir tourner par rapport à celles-ci, mais pouvant coulisser axialement à l'intérieur du boîtier extérieur (1), et comportant des surfaces de réaction (5), soumises à la pression du jet de forage, destinées à produire une force d'avance axiale agissant sur l'unité de forage pilote (3) dans le sens de la sole, et comprenant un corps tournant portant de son côté un trépan rotatif (10), entraîné en rotation par le moteur pour trou profond (16), caractérisé en ce que le boîtier extérieur (1) forme le stator du moteur pour trou profond, conçu en turbine (16), et un boîtier intérieur (17) tubulaire, soutenu tournant dans le boîtier extérieur (1), forme le rotor de la turbine (16) et en ce que dans le boîtier intérieur (17) sont prévues les glissières longitudinales (18) soutenant l'unité de forage pilote en fonctionnement.
  2. Outil de forage selon la revendication 1, caractérisé en ce que le corps tubulaire (6) s'étend en continu sur toute la hauteur de l'unité de forage pilote (3), est rigide et est directement pourvu à son extrémité supérieure du dispositif de prise (4).
  3. Outil de forage selon les revendications 1 ou 2, caractérisé en ce que l'unité de forage pilote (3) est réalisée sous la forme d'un carottier, dans lequel le corps tubulaire forme un tube carottier (6) dans lequel il est prévu un tube intérieur (7), monté de manière à pouvoir tourner librement à l'intérieur de celui-ci, destiné à loger une carotte obtenue par forage, et porte à son extrémité inférieure une couronne de forage.
  4. Outil de forage selon les revendications 1 ou 2, caractérisé en ce que le corps tubulaire (6) porte à son extrémité inférieure un trépan à rotation totale.
  5. Outil de forage selon l'une des revendications 1 à 4, caractérisé en ce que des rallonges tubulaires peuvent être insérées dans les corps tubulaires (6) au-dessus de leur zone d'engagement avec les glissières longitudinales (18), du boîtier intérieur (17).
EP90107054A 1989-04-13 1990-04-12 Outil de forage Expired - Lifetime EP0392544B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3912067A DE3912067C1 (fr) 1989-04-13 1989-04-13
DE3912067 1989-04-13

Publications (3)

Publication Number Publication Date
EP0392544A2 EP0392544A2 (fr) 1990-10-17
EP0392544A3 EP0392544A3 (fr) 1992-04-08
EP0392544B1 true EP0392544B1 (fr) 1994-07-20

Family

ID=6378550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107054A Expired - Lifetime EP0392544B1 (fr) 1989-04-13 1990-04-12 Outil de forage

Country Status (4)

Country Link
US (1) US5038873A (fr)
EP (1) EP0392544B1 (fr)
CA (1) CA2014570A1 (fr)
DE (1) DE3912067C1 (fr)

Families Citing this family (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5163522A (en) * 1991-05-20 1992-11-17 Baker Hughes Incorporated Angled sidewall coring assembly and method of operation
US5887668A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc. Wellbore milling-- drilling
US5887655A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc Wellbore milling and drilling
US5568838A (en) * 1994-09-23 1996-10-29 Baker Hughes Incorporated Bit-stabilized combination coring and drilling system
NL1009662C2 (nl) * 1998-07-15 2000-01-18 Fugro Eng Bv Inrichting voor het nemen van een bodemmonster, alsmede een daarin te gebruiken monstername-inrichting.
NL1016545C2 (nl) * 2000-11-03 2002-05-07 Fugro Eng Bv Een roteerbare kernboorinrichting en een roteerbaar kernboorsysteem uitgevoerd met een dergelijke roteerbare kernboorinrichting.
US8528664B2 (en) 2005-11-21 2013-09-10 Schlumberger Technology Corporation Downhole mechanism
US7617886B2 (en) 2005-11-21 2009-11-17 Hall David R Fluid-actuated hammer bit
US7360610B2 (en) * 2005-11-21 2008-04-22 Hall David R Drill bit assembly for directional drilling
US8225883B2 (en) 2005-11-21 2012-07-24 Schlumberger Technology Corporation Downhole percussive tool with alternating pressure differentials
US7424922B2 (en) * 2005-11-21 2008-09-16 Hall David R Rotary valve for a jack hammer
US8205688B2 (en) * 2005-11-21 2012-06-26 Hall David R Lead the bit rotary steerable system
US8267196B2 (en) 2005-11-21 2012-09-18 Schlumberger Technology Corporation Flow guide actuation
US7571780B2 (en) * 2006-03-24 2009-08-11 Hall David R Jack element for a drill bit
US7753144B2 (en) 2005-11-21 2010-07-13 Schlumberger Technology Corporation Drill bit with a retained jack element
US7484576B2 (en) 2006-03-23 2009-02-03 Hall David R Jack element in communication with an electric motor and or generator
US7559379B2 (en) * 2005-11-21 2009-07-14 Hall David R Downhole steering
US7419018B2 (en) 2006-11-01 2008-09-02 Hall David R Cam assembly in a downhole component
US8130117B2 (en) * 2006-03-23 2012-03-06 Schlumberger Technology Corporation Drill bit with an electrically isolated transmitter
US7337858B2 (en) * 2005-11-21 2008-03-04 Hall David R Drill bit assembly adapted to provide power downhole
US7225886B1 (en) * 2005-11-21 2007-06-05 Hall David R Drill bit assembly with an indenting member
US7762353B2 (en) * 2006-03-23 2010-07-27 Schlumberger Technology Corporation Downhole valve mechanism
US8297375B2 (en) * 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US7591327B2 (en) * 2005-11-21 2009-09-22 Hall David R Drilling at a resonant frequency
US8316964B2 (en) 2006-03-23 2012-11-27 Schlumberger Technology Corporation Drill bit transducer device
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8297378B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Turbine driven hammer that oscillates at a constant frequency
US7497279B2 (en) * 2005-11-21 2009-03-03 Hall David R Jack element adapted to rotate independent of a drill bit
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7398837B2 (en) * 2005-11-21 2008-07-15 Hall David R Drill bit assembly with a logging device
US7419016B2 (en) 2006-03-23 2008-09-02 Hall David R Bi-center drill bit
US7730975B2 (en) * 2005-11-21 2010-06-08 Schlumberger Technology Corporation Drill bit porting system
US7270196B2 (en) 2005-11-21 2007-09-18 Hall David R Drill bit assembly
US7624824B2 (en) * 2005-12-22 2009-12-01 Hall David R Downhole hammer assembly
US7533737B2 (en) * 2005-11-21 2009-05-19 Hall David R Jet arrangement for a downhole drill bit
US7549489B2 (en) 2006-03-23 2009-06-23 Hall David R Jack element with a stop-off
US7641002B2 (en) * 2005-11-21 2010-01-05 Hall David R Drill bit
US7600586B2 (en) 2006-12-15 2009-10-13 Hall David R System for steering a drill string
US7900720B2 (en) 2006-01-18 2011-03-08 Schlumberger Technology Corporation Downhole drive shaft connection
US7661487B2 (en) * 2006-03-23 2010-02-16 Hall David R Downhole percussive tool with alternating pressure differentials
US7694756B2 (en) 2006-03-23 2010-04-13 Hall David R Indenting member for a drill bit
USD620510S1 (en) 2006-03-23 2010-07-27 Schlumberger Technology Corporation Drill bit
US8011457B2 (en) 2006-03-23 2011-09-06 Schlumberger Technology Corporation Downhole hammer assembly
US8596381B2 (en) * 2006-08-11 2013-12-03 David R. Hall Sensor on a formation engaging member of a drill bit
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US9145742B2 (en) 2006-08-11 2015-09-29 Schlumberger Technology Corporation Pointed working ends on a drill bit
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US20080035389A1 (en) * 2006-08-11 2008-02-14 Hall David R Roof Mining Drill Bit
US8122980B2 (en) * 2007-06-22 2012-02-28 Schlumberger Technology Corporation Rotary drag bit with pointed cutting elements
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US7637574B2 (en) 2006-08-11 2009-12-29 Hall David R Pick assembly
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US20100059289A1 (en) * 2006-08-11 2010-03-11 Hall David R Cutting Element with Low Metal Concentration
US9316061B2 (en) 2006-08-11 2016-04-19 David R. Hall High impact resistant degradation element
US8240404B2 (en) * 2006-08-11 2012-08-14 Hall David R Roof bolt bit
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US7669674B2 (en) 2006-08-11 2010-03-02 Hall David R Degradation assembly
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US8616305B2 (en) * 2006-08-11 2013-12-31 Schlumberger Technology Corporation Fixed bladed bit that shifts weight between an indenter and cutting elements
US7527110B2 (en) * 2006-10-13 2009-05-05 Hall David R Percussive drill bit
US8960337B2 (en) 2006-10-26 2015-02-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US7954401B2 (en) 2006-10-27 2011-06-07 Schlumberger Technology Corporation Method of assembling a drill bit with a jack element
US7392857B1 (en) 2007-01-03 2008-07-01 Hall David R Apparatus and method for vibrating a drill bit
CA2676350C (fr) * 2007-01-24 2015-12-01 J. I. Livingstone Enterprises Ltd. Appareil de carottage par marteau pneumatique et procede
US8839888B2 (en) 2010-04-23 2014-09-23 Schlumberger Technology Corporation Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
USD674422S1 (en) 2007-02-12 2013-01-15 Hall David R Drill bit with a pointed cutting element and a shearing cutting element
USD678368S1 (en) 2007-02-12 2013-03-19 David R. Hall Drill bit with a pointed cutting element
US7926883B2 (en) 2007-05-15 2011-04-19 Schlumberger Technology Corporation Spring loaded pick
US7866416B2 (en) 2007-06-04 2011-01-11 Schlumberger Technology Corporation Clutch for a jack element
US7721826B2 (en) * 2007-09-06 2010-05-25 Schlumberger Technology Corporation Downhole jack assembly sensor
US7967083B2 (en) 2007-09-06 2011-06-28 Schlumberger Technology Corporation Sensor for determining a position of a jack element
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
AU2014202589B2 (en) * 2008-09-30 2016-11-17 Deep Casing Tools Limited An apparatus and method for cutting a wellbore
GB0817882D0 (en) * 2008-09-30 2008-11-05 Futuretec Ltd An apparatus and method for cutting a wellbore
US8322796B2 (en) 2009-04-16 2012-12-04 Schlumberger Technology Corporation Seal with contact element for pick shield
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
SI22761A (sl) * 2009-07-22 2009-10-31 Kmetijski inštitut Slovenije Naprava za jemanje strukturno neporušenih vzorcev tal
US8550190B2 (en) 2010-04-01 2013-10-08 David R. Hall Inner bit disposed within an outer bit
US8418784B2 (en) 2010-05-11 2013-04-16 David R. Hall Central cutting region of a drilling head assembly
GB201010702D0 (en) * 2010-06-25 2010-08-11 Scott Edward D Hollow turbine power module
US8739899B2 (en) 2010-07-19 2014-06-03 Baker Hughes Incorporated Small core generation and analysis at-bit as LWD tool
US8820440B2 (en) 2010-10-01 2014-09-02 David R. Hall Drill bit steering assembly
US8333254B2 (en) 2010-10-01 2012-12-18 Hall David R Steering mechanism with a ring disposed about an outer diameter of a drill bit and method for drilling
US20120234604A1 (en) 2011-03-15 2012-09-20 Hall David R Timed Steering Nozzle on a Downhole Drill Bit
US20150267492A1 (en) * 2014-03-18 2015-09-24 Edwin J. Broussard, JR. Top mount dual bit well drilling system
DE102015003909A1 (de) * 2015-03-27 2016-09-29 TRACTO-TECHNlK GmbH & Co. KG Deckschichtbohrvorrichtung und Verfahren zum Bohren eines Kerns in eine Deckschicht

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2910273A (en) * 1956-01-19 1959-10-27 Neyrpic Ets Corer for turbine driven well drilling units
US2944792A (en) * 1956-05-28 1960-07-12 Neyrpic Ets Turbines for drilling and coring
DE1147548B (de) * 1957-05-16 1963-04-25 Neyrpic Ateliers Neyret Beylie Erdbohrgeraet mit Turbinenantrieb zur Entnahme von Bohrkernen
DE2953873C2 (de) * 1979-05-11 1985-01-31 Christensen, Inc., Salt Lake City, Utah Kernbohreinrichtung für Gesteinsbohrlöcher
US4518050A (en) * 1983-06-30 1985-05-21 Chevron Research Company Rotating double barrel core sampler
DE3701914C1 (de) * 1987-01-23 1988-05-19 Eastman Christensen Co Direktangetriebenes Kernbohrwerkzeug

Also Published As

Publication number Publication date
US5038873A (en) 1991-08-13
EP0392544A3 (fr) 1992-04-08
EP0392544A2 (fr) 1990-10-17
CA2014570A1 (fr) 1990-10-13
DE3912067C1 (fr) 1990-09-06

Similar Documents

Publication Publication Date Title
EP0392544B1 (fr) Outil de forage
EP0768446B1 (fr) Procédé et outil de forage pour le forage de puits dans les formations souterraines
DE602004001328T2 (de) Unterirdisches Bohren einer Lateralbohrung
DE3902869C1 (fr)
DE60305733T2 (de) Bohren eines bohrlochs
DE60132936T2 (de) Vorrichtung und Verfahren zur Herstellung einer Lateralbohrung
DE69421628T2 (de) Fräswerkzeug
DE69330033T2 (de) Verfahren und vorrichtung zum setzen eines ablenkkeiles
EP2562310B1 (fr) Agencement de forage sous-marin et procédé d'exécution d'un forage au fond de l'eau
DE3103762A1 (de) Einrichtung zum regeln der geschwindigkeit einer geraetebewegung in der verrohrung eines bohrlochs
DE3641521A1 (de) Vorrichtung und verfahren zum durchdringen einer bohrlochwand in einem mit einer auskleidung versehenen bohrloch
EP2085566A2 (fr) Installation de forage
DE10297474T5 (de) Verfahren und Vorrichtung zum Ausfräsen eines Abschnitts in Gegenrichtung
EP0242728A2 (fr) Outil de carottage pour le forage de la roche
DE102011122353A1 (de) Verdrahtete Schlammmotorkomponenten, Verfahren zu ihrer Herstellung und Untertagemotoren mit denselben
DE10328609B3 (de) Nassbohrwerkzeug, Bohranlage und Verfahren zum Niederbringen einer Bohrung im Boden
DE4333114C1 (de) Bohrvorrichtung mit teleskopierbarer Kellystange
DE3935897A1 (de) Verfahren und vorrichtung zum gesteinsbohren
DE2824441C2 (de) Erdbohrer
DE3326303C2 (de) Vorrichtung zum Herstellen verrohrter Bohrungen
EP1649128B1 (fr) Dispositif pour forer un trou dans la terre
DE1161524B (de) Verfahren und Vorrichtung zur Herstellung von Bohrschaechten und aehnlichen Bohrungen
DE3902870C2 (fr)
EP1181433B1 (fr) Trepan, procede de forage et extraction d'eau chaude
DE3729138C2 (fr)

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): FR GB

17P Request for examination filed

Effective date: 19920923

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: EASTMAN TELECO COMPANY

17Q First examination report despatched

Effective date: 19931014

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): FR GB

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

Effective date: 19940906

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

Ref country code: GB

Effective date: 19950412

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

Effective date: 19950412

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

Ref country code: FR

Effective date: 19951229

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST