EP0392544A2 - Drilling tool - Google Patents

Drilling tool Download PDF

Info

Publication number
EP0392544A2
EP0392544A2 EP90107054A EP90107054A EP0392544A2 EP 0392544 A2 EP0392544 A2 EP 0392544A2 EP 90107054 A EP90107054 A EP 90107054A EP 90107054 A EP90107054 A EP 90107054A EP 0392544 A2 EP0392544 A2 EP 0392544A2
Authority
EP
European Patent Office
Prior art keywords
drilling
outer housing
pilot
drilling unit
drilling tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90107054A
Other languages
German (de)
French (fr)
Other versions
EP0392544A3 (en
EP0392544B1 (en
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 Christensen Co
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 Christensen Co, Eastman Teleco Co filed Critical Eastman Christensen Co
Publication of EP0392544A2 publication Critical patent/EP0392544A2/en
Publication of EP0392544A3 publication Critical patent/EP0392544A3/en
Application granted granted Critical
Publication of EP0392544B1 publication Critical patent/EP0392544B1/en
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 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 solves this problem by means of a drilling tool with the features of claim 1. With regard to further refinements, 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 much 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 connection 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 tower, can be driven, but instead can also be stopped and locked in a predetermined alignment position against revolutions.
  • connection 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 work is omitted, as is the case e.g. may be the case with seabed exploration.
  • the drilling tool shown further comprises a core drilling unit 3 as a pilot drilling unit, which is attached to it by means of one Arranged upper end safety device 4 from the outer housing 1 and removable in this and axially displaceable in this during core drilling.
  • a core drilling unit 3 as a pilot drilling unit, which is attached to it by means of one Arranged upper end safety device 4 from the outer housing 1 and removable in this and axially displaceable in this during core drilling.
  • 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 also in 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 allows 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 casing 1 forms the stator and a tubular inner casing 17, which is rotatably supported in the outer casing 1 and is axially fixed in the process, the rotor of the turbine 16.
  • the inner casing 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 its own 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.
  • 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 forming the inner rotor of the turbine 16.
  • the pilot core hole can be drilled through to the bottom of the pilot core hole.
  • the turbine is assigned to the outer casing 1 for performance reasons, but also important for reasons of a low-level drive for the pilot drilling unit, in a sense in the sense of a turntable 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)

Abstract

The drilling tool comprises a tubular outer housing (1) which, via connection means, can be connected at its top end to a drill-pipe string and at its bottom end to a drill bit (2), a pilot drilling unit (3) which, by means of a catch device (4), can be drawn up out of the outer housing (1) and can be put down into the outer housing (1) and is also axially displaceable in the latter during the drilling operation, and a deep-hole motor (16) operated by drilling fluid. The pilot drilling unit (3) is supported in longitudinal guides (18) in such a way as to non-rotatable relative to these longitudinal guides (18) but axially displaceable inside the outer housing (1), has reaction surfaces (5) which can be acted upon by the pressure of the drilling fluid to produce an axial feed force acting on the pilot drilling unit (3) in the bottom direction, and has a rotary body which can be rotationally driven by the deep-hole motor (16) and in turn carries a rotary boring bit (10). In this arrangement, the outer housing (1) forms the stator of the deep-hole motor designed as a turbine (16), and a tubular inner housing (17) rotatably supported in the outer housing (1) forms the rotor of the turbine (16), and the longitudinal guides (18) supporting the pilot drilling unit in operation are provided in the inner housing (17).

Description

Die Erfindung bezieht sich auf ein Bohrwerkzeug in einer Ausbildung nach dem Oberbegriff des Anspruchs 1.The invention relates to a drilling tool in an embodiment according to the preamble of claim 1.

Bei einem bekannten Bohrwerkzeug dieser Art (DE-C-­37 01 914), wie es zum Pilotkernen Anwendung findet, ist der Tieflochmotor für den Antrieb des Kernrohrs der Kern­bohreinheit als Moineau-Motor ausgebildet und mitaufzieh­barer Bestandteil der Kernbohreinheit. Dabei ist der Stator des Tieflochmotors in Längsführungen des Außengehäuses unverdrehbar, jedoch axial verschiebbar abgestützt, und das Kernrohr der Kernbohreinheit ist im unteren Endbereich des Stators des Tieflochmotors drehbar gelagert und mit der Abtriebswelle des Tieflochmotors verbunden. Ein ähnliches Bohrwerkzeug veranschaulicht die US-A-­4 518 050, bei der als Tieflochmotor eine Bestandteil der aufziehbaren Kernbohreinheit bildende Turbine vorgesehen ist.In a known drilling tool of this type (DE-C-37 01 914), as is used for pilot cores, 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 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.

Der Erfindung liegt die Aufgabe zugrunde, ein Bohrwerkzeug zu schaffen, dessen Pilotbohreinheit mit besonders hoher Leistung antreibbar ist. Diese Aufgabe löst die Erfindung durch ein Bohrwerkzeug mit den Merkmalen des Anspruchs 1. Hinsichtlich weiterer Ausgestaltungen wird auf die An­sprüche 2 bis 5 verwiesen.The invention has for its object to provide a drilling tool, the pilot drilling unit can be driven with particularly high performance. The invention solves this problem by means of a drilling tool with the features of claim 1. With regard to further refinements, reference is made to claims 2 to 5.

Die erfindungsgemäße Gestaltung des Bohrwerkzeugs schafft eine außenordentlich einfache Pilotbohreinheit, die prak­tisch nur aus einem Rohrkörper mit direkt an dessen oberen Ende angebrachter Fangvorrichtung und dem gegebenenfalls im unteren Teil des frei drehbar gelagerten Innenrohrs besteht. Die dem Außengehäuse des Bohrwerkzeugs zugeordnete Turbine kann infolge dieser Zuordnung mit wesentlich größerem Durchmesser ausgeführt und für wesentlich höhere Leistungen und Drehzahlen ausgelegt werden, so daß das Pilotbohrwerkzeug erfindungsgemäßer Ausbildung besonders für Kernbohrarbeiten in Hartgestein geeignet ist.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. As a result of this assignment, the turbine assigned to the outer housing of the drilling tool can be designed with a much 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.

Hinsichtlich weiterer Einzelheiten wird auf die nachfolgende Beschreibung und die Zeichnung verwiesen, in der in einem abgebrochenen, schematischen Querschnitt ein Ausführungsbei­spiel des Gegenstands der Erfindung näher veranschaulicht ist.For further details, reference is made to the following description and the drawing, in which an exemplary embodiment of the subject matter of the invention is illustrated in more detail in a broken, schematic cross section.

Das dargestellte Bohrwerkzeug umfaßt im einzelnen ein rohr­förmiges Außengehäuse 1, das über Anschlußmittel, insbeson­dere ein Schraubgewinde, an seinem oberen Ende mit einem Bohrrohrstrang verbindbar ist, der in bekannter Weise mittels eines oberirdischen Antriebs, z.B. des Drehtisches eines Bohrturms, antreibbar, statt dessen aber auch still­setz- und in einer vorbestimmten Ausrichtstellung gegen Umdrehungen feststellbar ist.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 connection 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 tower, can be driven, but instead can also be stopped and locked in a predetermined alignment position against revolutions.

An seinem unteren Ende kann das Außengehäuse 1 eine Bohr­krone 2 tragen, die jede bekannte bzw. geeignete Ausbildung haben kann. Diese Bohrkrone 2 kann in besonderen Fällen auch entfallen, nämlich dann, wenn - zum Nachbohren des Bohrlochs von dem Durchmesser einer vorausgebohrten Pilot­bohrung auf Hauptbohrungsdurchmesser - ein besonderes, im Austausch zum Einsatz gelangendes Bohrwerkzeug, z.B. ein Vollbohrwerkzeug, ein Vollbohrwerkzeug mit Vertikal­bohrcharakteristik od.dgl., zum Einsatz gelangt, oder Auf­bohrarbeiten entfallen, wie dies z.B. bei Meeresbodener­kundungen der Fall sein kann.At its lower end, 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 work is omitted, as is the case e.g. may be the case with seabed exploration.

Das dargestellte Bohrwerkzeug umfaßt ferner als Pilotbohr­einheit eine Kernbohreinheit 3, die Mittels einer an ihrem oberen Ende angeordneten Fangvorrichtung 4 aus dem Außenge­häuse 1 aufziehbar und in dieses absetzbar sowie in diesem während des Kernbohrbetriebs axial verschiebbar ist.The drilling tool shown further comprises a core drilling unit 3 as a pilot drilling unit, which is attached to it by means of one Arranged upper end safety device 4 from the outer housing 1 and removable in this and axially displaceable in this during core drilling.

Die Kernbohreinheit 3 weist von der Bohrspülung während des Kernbohrbetriebs beaufschlagbare Reaktionsflächen 5 zur Erzeugung einer auf die Kernbohreinheit in Sohlenrich­tung der Bohrung wirkenden axialen Vorschubkraft auf und umfaßt ein Kernrohr 6 sowie ein in einer unteren Erweiterung des Kernrohrs 6 mittels einer Lagervorrichtung 8 um die Längsmittelachse 9 des Bohrwerkzeugs frei drehbar gelagertes Innenrohr 7 für die Aufnahme eines erbohrten Kerns. Das Kernrohr 6 weist an seinem unteren Ende eine eigene Bohr­krone 10 auf und hat einen axialen Strömungskanal 11, der oberhalb der Lagervorrichtung 8 in Verzweigungen 12 übergeht und in einen Strömungsspalt 13 zwischen dem Kernrohr 6 und dem Innenrohr 7 mündet. Am oberen Ende des Kernauf­nahmeraums 14 im Innenrohr 7 ist dieses mit einem Rück­schlagventil 15 versehen, das beim Einfahren der Kernbohr­einheit 3 in ein Bohrloch öffnet und eine aufwärts gerichte­te Durchströmung von im Bohrrohrstrang und im Bohrwerkzeug enthaltener Bohrspülung erlaubt.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 also in 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. 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 allows an upward flow of drilling fluid contained in the drill pipe string and in the drilling tool.

Stattdessen kann die Pilotbohreinheit 3 auch einen als Träger eines Volldrehbohrwerkzeugs ausgebildeten, mit der Fangvorrichtung 4 versehenen Rohrkörper aufweisen, der wahlweise zu einer Kernrohrausführung zum Einsatz kommen kann, z.B. zu abwechselnden Voll- und Kernbohrarbeiten.Instead, 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.

Das Bohrwerkzeug umfaßt ferner einen bohrspülungsbetriebenen Tieflochmotor, der als bohrspülungsbetriebene Turbine 16 ausgebildet ist. Dabei bildet das Außengehäuse 1 den Stator und ein rohrförmiges Innengehäuse 17, das im Außengehäuse 1 drehbar gelagert und dabei axial ortsfest abgestützt ist, den Rotor der Turbine 16. Das den Rotor der Turbine 16 bildende Innengehäuse 17 ist an seiner Innenseite mit axial ausgerichteten Längsführungen 18 versehen, durch die die Kernbohreinheit im Betrieb axial verschiebbar abge­stützt ist. Die Längsführungen 18, die vorzugsweise von einem Vielnutprofil gebildet sind, stehen in Umfangsrichtung in Mitnahmeeingriff mit Keilbereichen 19 am oberen Ende des Kernrohrs 6, so daß bei Betrieb der Turbine 16 diese unmittelbar das Kernrohr 6 antreibt.The drilling tool further comprises a drilling fluid operated deep hole motor which is designed as a drilling fluid operated turbine 16. The outer casing 1 forms the stator and a tubular inner casing 17, which is rotatably supported in the outer casing 1 and is axially fixed in the process, the rotor of the turbine 16. The inner casing 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.

Sowohl bei Ausbildung des Rohrkörpers als Kernrohr, als auch bei Ausbildung als Volldrehbohrmeißel-Träger können in den Rohrkörper unterhalb dessen Eingriffsbereichs 19 mit dem Innengehäuse 17 Verlängerungsrohrkörper eingesetzt werden, um die Pilotbohrstrecke zu vergrößern.Both when the tube body is designed as a core tube and when it is designed as a full rotary drill bit carrier, 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.

Infolge der Zuordnung der Turbine 16 zum Außengehäuse 1 kann die Turbine 16 mit relativ großem Durchmesser ausge­führt und dementsprechend für besonders hohe Leistungen und Drehzahlen ausgelegt werden. Während des Betriebs der Turbine 16 für das Pilotbohren mit Hilfe der sich dabei fortschreitend abwärts im Außengehäuse 1 verlagernden Pilot­bohreinheit 3 kann das Außengehäuse 1 stillgesetzt werden oder gleichzeitig eine Eigenumdrehung vermittels des ober­irdischen Antriebs über den Bohrrohrstrang ausführen. Auf diese Weise ist es in dafür geeigneten Formationen möglich, schon kurz nach Beginn eines Pilotkernbohrens und vor dessen Abschluß bereits mit dem Aufbohren des Bohrlochs zu be­ginnen.As a result of the assignment of the turbine 16 to the outer housing 1, the turbine 16 can be designed with a relatively large diameter and can accordingly be designed for particularly high powers and speeds. During the operation of the turbine 16 for pilot drilling with the aid of the pilot drilling unit 3 progressively moving downwards in the outer casing 1, the outer casing 1 can be stopped or at the same time make its own 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.

Bei Pilotkernbohrungen wird nach Erbohren eines Kerns die Kernbohreinheit 3 samt im Aufnahmeraum 14 des Innenrohrs 7 befindlichem Kern aufgezogen und nach oberirdischer Entnahme des Kerns wieder eingefahren und in das den Innen­rotor der Turbine 16 bildende Innengehäuse 17 des Bohrwerk­zeugs abgesetzt. Während des Aufzieh- und des Absetzvor­ganges der Kernbohreinheit 3 kann das Aufbohren der Pilot­kernbohrung bis hin zur Sohle der Pilotkernbohrung vorge­nommen werden.In 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 forming the inner rotor of the turbine 16. During the pulling-up and setting-down process of the core drilling unit 3, the pilot core hole can be drilled through to the bottom of the pilot core hole.

Aber auch in Fällen, in denen ein Aufbohren von Pilot­bohrungen nicht erforderlich ist, z.B. bei Untersuchungen von Meeresböden, bei denen das Außengehäuse 1 ohne eigene Bohrkrone Verwendung finden und mit seinem unteren Ende auf den Meeresboden aufgesetzt werden kann, ist die Zuord­nung der Turbine zum Außengehäuse 1 aus Leistungsgründen, aber auch aus Gründen eines tiefgelegten Antriebs für die Pilotbohreinheit, gewissermaßen im Sinne eines nahe an die Bohrsohle heranversetzten Drehtisches, von Bedeutung, insbesondere bei größeren Wassertiefen und durch Ver­längerungen gebildete Pilotbohrstränge von erheblicher Länge.But even in cases in which it is not necessary to drill pilot holes, for example in the investigation of seabeds, in which the outer casing 1 is used without its own drill bit and the lower end of which can be placed on the seabed, the turbine is assigned to the outer casing 1 for performance reasons, but also important for reasons of a low-level drive for the pilot drilling unit, in a sense in the sense of a turntable 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.

Claims (5)

1. Bohrwerkzeug, mit einem rohrförmigen Außengehäuse (1), das über Anschlußmittel an seinem oberen Ende mit einem Bohrrohrstrang und an seinem unteren Ende mit einer Bohrkrone (2) verbindbar ist, einer Pilotbohreinheit (3), die mittels einer Fangvorrichtung (4) aus dem Außengehäuse (1) aufziehbar und in dieses absetzbar sowie in diesem während des Bohrbetriebs axial verschiebbar ist, und einem bohrspülungsbetriebenen Tieflochmotor (16), wobei die Pilot­bohreinheit (3) in Längsführungen (18) relativ zu diesen unverdrehbar, jedoch axial verschiebbar innerhalb des Außen­gehäuses (1) abgestützt ist, vom Druck der Bohrspülung beaufschlagbare Reaktionsflächen (5) zur Erzeugung einer auf die Pilotbohreinheit (3) in Sohlenrichtung wirkenden axialen Vorschubkraft aufweist und einen drehbar vom Tief­lochmotor (16) antreibbaren, seinerseits einen Drehbohr­meißel (10) tragenden Drehkörper umfaßt, dadurch gekenn­zeichnet, daß das Außengehäuse (1) den Stator des als Turbine (16) ausgebildeten Tieflochmotors und ein rohr­förmiges, im Außengehäuse (1) drehbar abgestütztes Innenge­häuse (17) den Rotor der Turbine (16) bildet und im Innen­gehäuse (17) die die Pilotbohreinheit im Betrieb abstützen­den Längsführungen (18) vorgesehen sind.1. drilling tool, with a tubular outer housing (1) which can be connected via connecting means at its upper end to a drill pipe string and at its lower end to a drill bit (2), a pilot drilling unit (3), which is made by means of a safety device (4) the outer housing (1) can be pulled up and placed in it and axially displaceable in it during drilling operation, and a drilling fluid operated deep hole motor (16), the pilot drilling unit (3) being non-rotatable in longitudinal guides (18) relative to these, but axially displaceable inside the outer housing (1) is supported, has reaction surfaces (5) which can be acted upon by the pressure of the drilling fluid to generate an axial feed force acting on the pilot drilling unit (3) in the sole direction and comprises a rotating body which can be driven rotatably by the deep hole motor (16) and which in turn carries a rotary drill bit (10), characterized in that the outer housing (1) comprises the stator as a turbine (16) formed deep hole motor and a tubular inner housing (17) rotatably supported in the outer housing (1) forms the rotor of the turbine (16) and in the inner housing (17) the longitudinal guides (18) supporting the pilot drilling unit during operation are provided. 2. Bohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß der Rohrkörper (6) eine über die Höhe der Pilotbohrein­heit (3) durchgehende, starre, am oberen Ende direkt mit der Fangvorrichtung (4) versehene Ausbildung aufweist.2. Drilling tool according to claim 1, characterized in that the tubular body (6) has a continuous over the height of the pilot drilling unit (3), rigid, at the upper end directly with the safety device (4) provided training. 3. Bohrwerkzeug nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß die Pilotbohreinheit (3) als Kernbohreinheit ausgeführt ist, bei der der Rohrkörper ein Kernrohr (6) bildet, in dem ein darin frei drehbar gelagertes Innenrohr (7) für die Aufnahme eines erbohrten Kerns vorgesehen ist, und an seinem unteren Ende eine Bohrkrone trägt.3. Drilling tool according to claim 1 or 2, characterized in that the pilot drilling unit (3) is designed as core drilling, wherein the tubular body forms a core tube (6) in which a is freely rotatably mounted inner tube (7) drilled a for receiving Kerns is provided, and carries a drill bit at its lower end. 4. Bohrwerkzeug nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß der Rohrkörper (6) an seinem unteren Ende einen Volldrehbohrmeißel trägt.4. Drilling tool according to claim 1 or 2, characterized in that the tubular body (6) carries a full rotary drill bit at its lower end. 5. Bohrwerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß in den Rohrkörper (6) unterhalb dessen Eingriffsbereichs mit den Längsführungen (18) im Innenge­häuse (17) Verlängerungsrohrkörper einsetzbar sind.5. Drilling tool according to one of claims 1 to 4, characterized in that in the tubular body (6) below its engagement area with the longitudinal guides (18) in the inner housing (17) extension tube body can be used.
EP90107054A 1989-04-13 1990-04-12 Drilling tool Expired - Lifetime EP0392544B1 (en)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=6378550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107054A Expired - Lifetime EP0392544B1 (en) 1989-04-13 1990-04-12 Drilling tool

Country Status (4)

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

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 (en) * 1998-07-15 2000-01-18 Fugro Eng Bv Device for taking a soil sample, as well as a sampling device to be used therein.
NL1016545C2 (en) * 2000-11-03 2002-05-07 Fugro Eng Bv A rotatable core drilling device and a rotatable core drilling system equipped with such a rotatable core drilling device.
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 (en) * 2007-01-24 2015-12-01 J. I. Livingstone Enterprises Ltd. Air hammer coring apparatus and method
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 (en) * 2009-07-22 2009-10-31 Kmetijski inštitut Slovenije Device for non-destructive sampling of soil
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 (en) * 2015-03-27 2016-09-29 TRACTO-TECHNlK GmbH & Co. KG Covering layer drilling apparatus and method for drilling a core into a cover layer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1147548B (en) * 1957-05-16 1963-04-25 Neyrpic Ateliers Neyret Beylie Earth drill with turbine drive for removing drill cores
DE2953873C2 (en) * 1979-05-11 1985-01-31 Christensen, Inc., Salt Lake City, Utah Core drilling equipment for rock boreholes
DE3701914C1 (en) * 1987-01-23 1988-05-19 Eastman Christensen Co Directly driven core drilling tool

Family Cites Families (3)

* 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
US4518050A (en) * 1983-06-30 1985-05-21 Chevron Research Company Rotating double barrel core sampler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1147548B (en) * 1957-05-16 1963-04-25 Neyrpic Ateliers Neyret Beylie Earth drill with turbine drive for removing drill cores
DE2953873C2 (en) * 1979-05-11 1985-01-31 Christensen, Inc., Salt Lake City, Utah Core drilling equipment for rock boreholes
DE3701914C1 (en) * 1987-01-23 1988-05-19 Eastman Christensen Co Directly driven core drilling tool

Also Published As

Publication number Publication date
US5038873A (en) 1991-08-13
EP0392544A3 (en) 1992-04-08
EP0392544B1 (en) 1994-07-20
CA2014570A1 (en) 1990-10-13
DE3912067C1 (en) 1990-09-06

Similar Documents

Publication Publication Date Title
EP0392544B1 (en) Drilling tool
DE3902869C1 (en)
EP0768446B1 (en) Method and boring tool for drilling into subterranean formations
DE69421628T2 (en) MILLING TOOL
DE602004001328T2 (en) Underground drilling of a lateral bore
DE60132936T2 (en) Apparatus and method for producing a lateral bore
DE60305733T2 (en) DRILLING A DRILL
DE69505523T2 (en) METHOD FOR DRILLING A SIDE HOLE
DE69527591T2 (en) Motor arrangement for directional drilling
EP2562310B1 (en) Submarine drilling assembly and method for producing a borehole in a sea floor
DE3103762A1 (en) DEVICE FOR REGULATING THE SPEED OF A DEVICE MOVEMENT IN THE PIPING OF A DRILL HOLE
DE10297474T5 (en) Method and device for milling a section in the opposite direction
EP2085566A2 (en) Drilling assembly
EP0242728A2 (en) Coring tool for rock drilling
DE10328609B3 (en) Wet-drilling tool for drilling a hole in the ground comprises a passage device having a tubular dome with an inlet opening above a collecting container and a connecting rod connection for a boring rod
DE3825225C2 (en)
DE4333114C1 (en) Drilling apparatus with telescopic kelly bar
DE69503251T2 (en) DEVICE AND METHOD FOR MAKING A SLOT IN AN UNDERGROUND FORMATION
DE3326303C2 (en) Device for producing cased boreholes
EP1649128B1 (en) Device for drilling a bore in the ground
DE1161524B (en) Method and device for producing drill shafts and similar bores
DE3902870C2 (en)
DE3622934C2 (en) Compact drilling rig
DE3729138C2 (en)
DE2418771A1 (en) Downhole turbodrill with low and high speed turbines - only part of the mud passing through the high speed turbine

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