EP0338367A2 - Core-drilling tool - Google Patents

Core-drilling tool Download PDF

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Publication number
EP0338367A2
EP0338367A2 EP89106285A EP89106285A EP0338367A2 EP 0338367 A2 EP0338367 A2 EP 0338367A2 EP 89106285 A EP89106285 A EP 89106285A EP 89106285 A EP89106285 A EP 89106285A EP 0338367 A2 EP0338367 A2 EP 0338367A2
Authority
EP
European Patent Office
Prior art keywords
core
measuring unit
tool according
drilling
tube
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Withdrawn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
EP89106285A
Other languages
German (de)
French (fr)
Other versions
EP0338367A3 (en
Inventor
Rainer Dr. Jürgens
Axel Sperber
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 EP0338367A2 publication Critical patent/EP0338367A2/en
Publication of EP0338367A3 publication Critical patent/EP0338367A3/en
Withdrawn legal-status Critical Current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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/16—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors for obtaining oriented cores
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • E21B47/013—Devices specially adapted for supporting measuring instruments on drill bits
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/26—Storing data down-hole, e.g. in a memory or on a record carrier

Definitions

  • the invention relates to a core drilling tool in an embodiment according to the preamble of claim 1, as is known for example from GB-PS 1 134 203.
  • the invention has for its object to provide a core drilling tool of the generic type with which, in addition to rock samples, data can also be supplied from the borehole, with the aid of which the efficiency of the core drilling process can be increased.
  • the arrangement of the measuring unit in the upper area of the core tube part of the inner tube, which is non-rotatable relative to the outer tube, not only enables permanent data acquisition, processing and storage, largely independent of interference from the drilling process, but also data transmission to one independent of an expansion of the outer tube and the drill pipe above-ground information recipients, either intermittently or, if necessary, continuously.
  • a particularly simple intermittent delivery of determined, processed and stored data takes place in connection with the winding of the core tube for extracting a drilled core.
  • a measuring unit which can be detached from the core tube part by means of a special catching tool and can be brought to light independently of this, which only presupposes an annular basic design of the carrier part of the inner tube.
  • the measuring unit can be coupled to a pressure pulse generator, with the aid of which sensors, which can be ascertained above the surface and ascertained data of the measuring unit, can generate corresponding pressure pulses in the drilling fluid.
  • Measuring units for recording selected data in a borehole are known in principle, but form either separately by means of a rope or the like. units that can be lowered into a borehole and that are permanently assigned to a drilling tool and can only be recovered with this during a round trip (US Pat. Nos. 4,161,782, 4,389,792 and 4,499,955).
  • Fig. 1 illustrates a schematic representation of a drilling rig with a derrick 1 and a drilling platform 2 with a rotary table (not shown in detail) which can be set in rotation by a drive for a drill pipe string 3 which extends down to a core drilling tool 5 in a borehole 4.
  • the core drilling tool 5 comprises an outer tube 6, which is connected at its upper end via connection means, not shown, e.g. Screw thread connections, is connected to the lower end of the drill pipe string 3 and at its lower end to a core drill bit 7.
  • connection means not shown, e.g. Screw thread connections
  • the core drilling tool comprises an inner tube 8, which forms a separate unit that can be brought to light, is designed in its lower region as a receptacle for a progressively drilled core 9 and in its upper region a measuring unit 10 for the on-site detection, processing and storage of borehole, Drilling core and / or drilling process parameter data is provided.
  • the inner tube 8 and the measuring unit 10 assigned to it can be found together hydraulically by means of the drilling fluid, but the inner tube 8 can also be pulled up by a traction means 11, which can be coupled to the upper end of the inner tube 8 by means of a safety device 12, the above ground runs onto a winding drum 13 which can be set in rotation by means of a drive (not shown).
  • the outer tube 6 of the core drilling tool 5 consists of several tube sections 14, 15 which are screwed together at 16 and connected to the core bit 7 by means of a screw connection 17.
  • the inner tube 8 comprises a support part 18, which is supported in the outer tube 6 and rotates with it, as well as a core tube part 20 which is non-rotatably suspended from it by means of a bearing 19 relative to the outer tube 6 and which, in the example shown, consists of the parts 23, 24 and 21 screwed together at 21 and 22 respectively 25 is composed.
  • the two parts 23, 24 of the core tube part 20 together enclose the measuring unit 10 correspondingly arranged in the upper region of the core tube part 20, while the lower part 25 forms the receptacle for a drilled core 9.
  • the inside of the lower part 25 of the core tube part 20 is connected to the annular space via a passage 27, this connection being interrupted by a valve ball 28 during core drilling operation.
  • the measuring unit 10 comprises, for example, a measured value recording unit 29 with a plurality of measured value recorders 30, only one of which is illustrated, a processing unit 31 for data and a storage unit 32 for their Storage.
  • the measuring unit 10 comprises a supply unit 33 for its energy supply, which in the example shown is formed by a set of rechargeable electric batteries. Instead, an electrical generator that can be driven by a drilling fluid can also be provided as the supply unit 33.
  • rechargeable batteries which is generally preferred for reasons of cost, it goes without saying that batteries of a design are used which take into account underground operation, in particular the temperature conditions.
  • the measuring unit may have an area shielded by a thermal protector 34 for receiving heat sensitive components, e.g. microprocessors, etc., but instead it is also possible to equip the respective heat-sensitive components with a separate heat protection device.
  • a thermal protector 34 for receiving heat sensitive components, e.g. microprocessors, etc., but instead it is also possible to equip the respective heat-sensitive components with a separate heat protection device.
  • measurement transducers 30 are preferably used for the detection of borehole temperature, borehole inclination, borehole azimuth, drilling progress, drilling pressure, torque, rotational speed, rock quality, core gain, core progress, core jamming, core orientation and / or core quality, and that of the measuring values Participants 30 each recorded data are processed according to predetermined programs in the processing unit 31 and stored in the storage unit 32 in an unprocessed and / or processed form.
  • the measuring unit 10 can be removed from the upper area of the core tube part 20 after the inner tube 8 has been pulled open and the data can be taken from the measuring unit 10 via its communication connection 34, at the same time resetting the measuring unit 10 can go hand in hand for a new work cycle.
  • continuous data transmission is also conceivable, namely when the measuring unit 10 is coupled to a pressure pulse generator (not shown) for generating pressure pulses in the drilling fluid, which are measured data that can be measured using sensors.
  • a permanent data transmission is also conceivable via a line, which can be arranged in this when using a traction means 11 which can be connected to the inner tube 8 by means of the catching device 12.
  • the catching device 12 and the measuring unit 10 can have connecting means that engage in data transmission when the inner tube 8 is caught, e.g. those that enable inductive transmission.
  • the safety device 12 with its traction means 11 can be in Engage with the inner tube 8 to ensure continuous data transmission.
  • an intermittent data transmission to the surface information recipient in the course of pulling on the inner tube 8 is sufficient.

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  • 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)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Earth Drilling (AREA)

Abstract

The core-drilling tool for rock bores in underground soil formations comprises an outer tube (6) which can be connected at its top end via attachment means to the bottom end of a drill-pipe string (3), which can be set in drive rotation, and at its bottom end to a core-drilling bit (7), and an inner tube (8) which forms a construction unit which can be conveyed separately to the surface and has a support part (18), which is supported in the outer tube (6) in such a way that it rotates with the latter, as well as a core-tube part (20) for receiving a bored core, which core-tube part (20) is suspended on the support part (18) by means of a bearing arrangement in such a way as to locked against rotation relative to the outer tube (6). Here, the core-tube part (20) is provided with a measuring unit (10), arranged in its upper area, for recording, processing and storing data from the working face, which data form drill-hole, drilling-core and/or drilling-process parameters.

Description

Die Erfindung bezieht sich auf ein Kernbohrwerkzeug in einer Ausbildung gemäß dem Oberbegriff des Anspruchs 1, wie es beispielsweise aus der GB-PS 1 134 203 bekannt ist.The invention relates to a core drilling tool in an embodiment according to the preamble of claim 1, as is known for example from GB-PS 1 134 203.

Der Erfindung liegt die Aufgabe zugrunde, ein Kernbohrwerk­zeug gattungsgemäßer Art zu schaffen, mit dem neben Ge­steinsproben auch Daten aus dem Bohrloch lieferbar sind, mit deren Hilfe die Effizienz des Kernbohrvorganges erhöht werden kann.The invention has for its object to provide a core drilling tool of the generic type with which, in addition to rock samples, data can also be supplied from the borehole, with the aid of which the efficiency of the core drilling process can be increased.

Die Erfindung löst diese Aufgabe mit einem Kernbohrwerkzeug mit den Merkmalen des kennzeichnenden Teils des Anspruchs 1. Hinsichtlich wesentlicher weiterer Ausgestaltungen wird auf die Ansprüche 2 bis 14 verwiesen.The invention solves this problem with a core drilling tool with the features of the characterizing part of claim 1. With regard to further essential configurations, reference is made to claims 2 to 14.

Die Anordnung der Meßeinheit im oberen Bereich des relativ zum Außenrohr unverdrehbaren Kernrohrteils des Innenrohrs ermöglicht nicht nur eine ständige, von Störeinflüssen des Bohrvorganges weitgehend unabhängige Datenerfassung, -verarbeitung und -speicherung, sondern auch eine von einem Ausbau des Außenrohres und des Bohrgestänges unabhängige Datenübertragung zu einem übertägigen Informationsempfänger, und zwar entweder intermittierend oder im Bedarfsfalle auch stetig. Eine besonders einfache intermittierende Ab­lieferung ermittelter, verarbeiteter und gespeicherter Daten erfolgt in Verbindung mit dem Aufziehen des Kernrohrs für die Zutageförderung eines erbohrten Kerns. Eine andere, vom Zutagefördern des Innenrohrs unabhängige Möglichkeit zur obertägigen Ablieferung von Daten verwirklicht eine Meßeinheit, die mittels eines besonderen Fangwerkzeugs aus dem Kernrohrteil lösbar und von diesem unabhängig zutage förderbar ist, was lediglich eine ringförmige Grundge­staltung des Trägerteils des Innenrohres voraussetzt. Zum Zwecke einer intermittierenden oder auch ständigen Daten­übermittelung an einen übertägigen Informationsempfänger kann die Meßeinheit mit einem Druckpulsgeber gekoppelt sein, mit dessen Hilfe von Sensoren obertägig erfaßbare, ermittelten Daten der Meßeinheit entsprechende Druckpulse in der Bohrspülung erzeugbar sind.The arrangement of the measuring unit in the upper area of the core tube part of the inner tube, which is non-rotatable relative to the outer tube, not only enables permanent data acquisition, processing and storage, largely independent of interference from the drilling process, but also data transmission to one independent of an expansion of the outer tube and the drill pipe above-ground information recipients, either intermittently or, if necessary, continuously. A particularly simple intermittent delivery of determined, processed and stored data takes place in connection with the winding of the core tube for extracting a drilled core. Another way of delivering data above ground independent of the conveying of the inner tube is realized by a measuring unit which can be detached from the core tube part by means of a special catching tool and can be brought to light independently of this, which only presupposes an annular basic design of the carrier part of the inner tube. For the purpose of intermittent or permanent data transmission to an above-ground information receiver, the measuring unit can be coupled to a pressure pulse generator, with the aid of which sensors, which can be ascertained above the surface and ascertained data of the measuring unit, can generate corresponding pressure pulses in the drilling fluid.

Meßeinheiten zur Erfassung ausgewählter Daten in einem Bohrloch sind grundsätzlich bekannt, bilden jedoch entweder gesondert mittels Seil od.dgl. in ein Bohrloch absenkbare Einheiten oder Einheiten, die einem Bohrwerkzeug fest zuge­ordnet und nur mit diesem bei einem Roundtrip wieder zutage förderbar sind (US-Psen 4 161 782, 4 389 792 und 4 499 955).Measuring units for recording selected data in a borehole are known in principle, but form either separately by means of a rope or the like. units that can be lowered into a borehole and that are permanently assigned to a drilling tool and can only be recovered with this during a round trip (US Pat. Nos. 4,161,782, 4,389,792 and 4,499,955).

Ein Ausführungsbeispiel des Gegenstands der Erfindung ist in der Zeichnung schematisch näher veranschaulicht. In der Zeichnung zeigen:

  • Fig. 1 eine abgebrochene schematische Gesamtdar­stellung einer Kernbohranlage mit einem Kernbohrwerkzeug nach der Erfindung, teilweise im Schnitt,
  • Fig. 2 einen abgebrochenen Längsschnitt durch ein Kernbohrwerkzeug erfindungsgemäßer Ausbildung, und
  • Fig. 3 eine schematische Einzeldarstellung der Meßein­heit, teilweise im Längsschnitt.
An embodiment of the object of the invention is illustrated schematically in the drawing. The drawing shows:
  • 1 is a broken schematic overall view of a core drilling system with a core drilling tool according to the invention, partly in section,
  • Fig. 2 is a broken longitudinal section through a core drilling tool inventive design, and
  • Fig. 3 is a schematic individual representation of the measuring unit, partly in longitudinal section.

Die Fig. 1 veranschaulicht in schematischer Darstellung eine Bohranlage mit einem Bohrturm 1 und einer Bohrplattform 2 mit einem nicht näher dargestellten, durch einen Antrieb in Umdrehung versetzbaren Drehtisch für einen Bohrrohrstrang 3, der sich in einem Bohrloch 4 zu einem Kernbohrwerkzeug 5 heraberstreckt.Fig. 1 illustrates a schematic representation of a drilling rig with a derrick 1 and a drilling platform 2 with a rotary table (not shown in detail) which can be set in rotation by a drive for a drill pipe string 3 which extends down to a core drilling tool 5 in a borehole 4.

Das Kernbohrwerkzeug 5 umfaßt ein Außenrohr 6, das an seinem oberen Ende über nicht näher dargestellte Anschlußmittel, z.B. Schraubgewindeanschlüsse, mit dem unteren Ende des Bohrrohrstranges 3 und an seinem unteren Ende mit einer Kernbohrkrone 7 verbunden ist.The core drilling tool 5 comprises an outer tube 6, which is connected at its upper end via connection means, not shown, e.g. Screw thread connections, is connected to the lower end of the drill pipe string 3 and at its lower end to a core drill bit 7.

Ferner umfaßt das Kernbohrwerkzeug ein Innenrohr 8, das eine gesondert zutage förderbare Baueinheit bildet, in seinem unteren Bereich als Aufnahme für einen fortschreitend erbohrten Kern 9 ausgebildet ist und in seinem oberen Bereich eine Meßeinheit 10 zur Vororterfassung, -verarbei­tung und -speicherung von Bohrloch-, Bohrkernund/oder Bohr­prozeßparameter bildenden Daten versehen ist. Das Innenrohr 8 und die ihr zugeordnete Meßeinheit 10 können gemeinsam hydraulisch mittels der Bohrspülung zutage gefödert werden, jedoch kann das Innenrohr 8 auch durch ein Zugmittel 11, das mittels einer Fangvorrichtung 12 mit dem oberen Ende des Innenrohrs 8 kuppelbar ist, aufgezogen werden, das obertägig auf eine mittels eines nicht dargestellten Antriebs in Umdrehung versetzbare Wickeltrommel 13 aufläuft.Furthermore, the core drilling tool comprises an inner tube 8, which forms a separate unit that can be brought to light, is designed in its lower region as a receptacle for a progressively drilled core 9 and in its upper region a measuring unit 10 for the on-site detection, processing and storage of borehole, Drilling core and / or drilling process parameter data is provided. The inner tube 8 and the measuring unit 10 assigned to it can be found together hydraulically by means of the drilling fluid, but the inner tube 8 can also be pulled up by a traction means 11, which can be coupled to the upper end of the inner tube 8 by means of a safety device 12, the above ground runs onto a winding drum 13 which can be set in rotation by means of a drive (not shown).

Wie der Fig. 2 näher entnommen werden kann, besteht das Außenrohr 6 des Kernbohrwerkzeugs 5 aus mehreren Rohrab­schnitten 14,15, die untereinander bei 16 verschraubt und mittels einer Schraubverbindung 17 mit der Kernbohrkrone 7 verbunden sind.As can be seen in FIG. 2, the outer tube 6 of the core drilling tool 5 consists of several tube sections 14, 15 which are screwed together at 16 and connected to the core bit 7 by means of a screw connection 17.

Das Innenrohr 8 umfaßt einen im Außenrohr 6 mit diesem mitdrehend abgestützten Trägerteil 18 sowie einen an diesem mittels einer Lagerung 19 relativ zum Außenrohr 6 unver­drehbar aufgehängten Kernrohrteil 20, der bei dem darge­stellten Beispiel aus den untereinander bei 21 bzw. 22 verschraubten Teilen 23,24 und 25 zusammengesetzt ist.The inner tube 8 comprises a support part 18, which is supported in the outer tube 6 and rotates with it, as well as a core tube part 20 which is non-rotatably suspended from it by means of a bearing 19 relative to the outer tube 6 and which, in the example shown, consists of the parts 23, 24 and 21 screwed together at 21 and 22 respectively 25 is composed.

Die beiden Teile 23,24 des Kernrohrteils 20 umschließen gemeinsam die dementsprechend im oberen Bereich des Kern­rohrteils 20 angeordnete Meßeinheit 10, während der untere Teil 25 die Aufnahme für einen erbohrten Kern 9 bildet. Das Innere des unteren Teils 25 des Kernrohrteils 20 ist ber einen Durchlaß 27 mit dem Ringraum verbunden, wobei diese Verbindung im Kernbohrbetrieb durch eine Ventilkugel 28 unterbrochen ist.The two parts 23, 24 of the core tube part 20 together enclose the measuring unit 10 correspondingly arranged in the upper region of the core tube part 20, while the lower part 25 forms the receptacle for a drilled core 9. The inside of the lower part 25 of the core tube part 20 is connected to the annular space via a passage 27, this connection being interrupted by a valve ball 28 during core drilling operation.

Wie der Fig. 3 entnommen werden kann, die ganz schematisch die Meßeinheit 10 wiedergibt, umfaßt die Meßeinheit 10 beispielsweise eine Meßwertaufnahmeeinheit 29 mit einer Mehrzahl von Meßwertaufnehmern 30, von denen lediglich einer veranschaulicht ist, eine Verarbeitungseinheit 31 für Daten und eine Speichereinheit 32 für deren Speicherung. Schließlich umfaßt die Meßeinheit 10 zu ihrer Energiever­sorgung eine Versorgungseinheit 33, die bei dem darge­stellten Beispiel von einem Satz wiederaufladbaren elek­trischen Batterien gebildet ist. Statt dessen kann als Versorgungseinheit 33 auch ein von einer Bohrspülung an­treibbarer elektrischer Generator vorgesehen sein. Bei der aus Kostengründen im Regelfall bevorzugten Verwendung wiederaufladbarer Batterien versteht sich, daß Batterien einer Ausbildung Verwendung finden, die dem Untertagebe­trieb, insbesondere den Temperaturverhältnissen, besonders Rechnung tragen.As can be seen from FIG. 3, which shows the measuring unit 10 very schematically, the measuring unit 10 comprises, for example, a measured value recording unit 29 with a plurality of measured value recorders 30, only one of which is illustrated, a processing unit 31 for data and a storage unit 32 for their Storage. Finally, the measuring unit 10 comprises a supply unit 33 for its energy supply, which in the example shown is formed by a set of rechargeable electric batteries. Instead, an electrical generator that can be driven by a drilling fluid can also be provided as the supply unit 33. With the use of rechargeable batteries, which is generally preferred for reasons of cost, it goes without saying that batteries of a design are used which take into account underground operation, in particular the temperature conditions.

Die Meßeinheit kann einen durch eine Wärmeschutzvorrichtung 34 abgeschirmten Bereich für die Aufnahme wärmeempfindlicher Bauteile, z.B. von Mikroprozessoren etc., aufweisen, jedoch ist es statt dessen auch möglich, die jeweiligen wärme­empfindlichen Bauteile mit je einer gesonderten Wärmeschutz­vorrichtung auszurüsten.The measuring unit may have an area shielded by a thermal protector 34 for receiving heat sensitive components, e.g. microprocessors, etc., but instead it is also possible to equip the respective heat-sensitive components with a separate heat protection device.

Bevorzugt finden für die Ermittlung von Daten Meßwertauf­nehmer 30 für die Erfassung von Bohrlochtemperatur, Bohr­lochneigung, Bohrlochazimut, Bohrfortschritt, Bohrandruck, Drehmoment, Drehzahl, Gesteinsbeschaffenheit, Kerngewinn, Kernfortschritt, Kernverklemmung, Kernorientierung und/oder Kernbeschaffenheit Verwendung, und die von den Meßwertauf­ nehmern 30 jeweils aufgenommenen Daten werden nach vorgege­benen Programmen in der Verarbeitungseinheit 31 verarbeitet und in der Speichereinheit 32 in unverarbeiteter und/oder verarbeiteter Form gespeichert.For the determination of data, measurement transducers 30 are preferably used for the detection of borehole temperature, borehole inclination, borehole azimuth, drilling progress, drilling pressure, torque, rotational speed, rock quality, core gain, core progress, core jamming, core orientation and / or core quality, and that of the measuring values Participants 30 each recorded data are processed according to predetermined programs in the processing unit 31 and stored in the storage unit 32 in an unprocessed and / or processed form.

Um die aufgenommenen, verarbeiteten und gespeicherten Daten einem obertägigen Informationsempfänger zuzuführen, kann nach einem Aufziehen des Innenrohrs 8 die Meßeinheit 10 aus dem oberen Bereich des Kernrohrteils 20 genommen und die Daten der Meßeinheit 10 über deren Kommunikationsan­schluß 34 entnommen werden, wobei zugleich eine Rückstellung der Meßeinheit 10 für einen neuen Arbeitszyklus einhergehen kann.In order to supply the recorded, processed and stored data to an above-ground information receiver, the measuring unit 10 can be removed from the upper area of the core tube part 20 after the inner tube 8 has been pulled open and the data can be taken from the measuring unit 10 via its communication connection 34, at the same time resetting the measuring unit 10 can go hand in hand for a new work cycle.

Statt dessen ist es auch möglich, die Meßeinheit 10 mittels eines nicht dargestellten gesonderten Fangwerkzeugs bei entsprechend freiliegender Anordnung ihres oberen Endes zu erfassen, aus dem Kernrohrteil 20 unterirdisch auszulösen und für sich zutage zu fördern, um eine intermittierende Datenübermittlung unabhängig von Aufziehvorgängen des Innen­rohrs 8 gestalten zu können.Instead, it is also possible to detect the measuring unit 10 by means of a separate catch tool, not shown, with a correspondingly exposed arrangement of its upper end, to trigger it underground from the core tube part 20 and to bring it to light in order to make an intermittent data transmission independent of the winding processes of the inner tube 8 to be able to.

Statt dessen ist auch eine ständige Datenübermittlung denk­bar, nämlich dann, wenn die Meßeinheit 10 mit einem nicht dargestellten Druckpulserzeuger zur Erzeugung von ober­irdisch mittels Sensoren meßbaren, ausgewerteten Meßdaten entsprechenden Druckpulsen in der Bohrspülung gekoppelt ist.Instead, continuous data transmission is also conceivable, namely when the measuring unit 10 is coupled to a pressure pulse generator (not shown) for generating pressure pulses in the drilling fluid, which are measured data that can be measured using sensors.

Eine ständige Datenübermittlung ist auch über eine Leitung denkbar, die bei Verwendung eines mittels der Fangvorrich­tung 12 mit dem Innenrohr 8 verbindbaren Zugmittels 11 in diesem angeordnet sein kann. Dabei können die Fangvor­richtung 12 und die Meßeinheit 10 beim Fangen des Innenrohrs 8 in Datenübertragungseingriff gelangende Verbindungs­mittels aufweisen, z.B. solche, die eine induktive Über­tragung ermöglichen.A permanent data transmission is also conceivable via a line, which can be arranged in this when using a traction means 11 which can be connected to the inner tube 8 by means of the catching device 12. The catching device 12 and the measuring unit 10 can have connecting means that engage in data transmission when the inner tube 8 is caught, e.g. those that enable inductive transmission.

In besonderen Fällen kann während der Kernbohrvorgänge die Fangvorrichtung 12 mit ihrem Zugmittel 11 ständig in Eingriff mit dem Innenrohr 8 stehen, um eine fortlaufende Datenübertragung zu gewährleisten. In der Regel genügt jedoch eine intermittierende Datenübermittlung an den ober­tägigen Informationsempfänger im Zuge des Aufziehens des Innenrohrs 8.In special cases, during the core drilling operations, the safety device 12 with its traction means 11 can be in Engage with the inner tube 8 to ensure continuous data transmission. As a rule, however, an intermittent data transmission to the surface information recipient in the course of pulling on the inner tube 8 is sufficient.

Claims (14)

1. Kernbohrwerkzeug (5) für Gesteinsbohrungen in unterir­dischen Bodenformationen, mit einem Außenrohr (6), das an seinem oberen Ende über Anschlußmittel mit dem unteren Ende eines in Antriebsumdrehungen versetzbaren Bohrrohr­stranges (3) und an seinem unteren Ende mit einer Kernbohr­krone (7) verbindbar ist, und mit einem Innenrohr (8), das eine gesondert zutage förderbare Baueinheit bildet und einen im Außenrohr (6) mit diesem mitdrehend abge­stützten Trägerteil (18) sowie einen an diesem mittels einer Lagerung relativ zum Außenrohr (6) unverdrehbar aufge­hängten Kernrohrteil (20) für die Aufnahme eines erbohrten Kerns (9) aufweist, dadurch gekennzeichnet, daß der Kern­rohrteil mit einer in seinem oberen Bereich angeordneten Meßeinheit (10) zur Vororterfassung, -verarbeitung und speicherung von Bohrloch-, Bohrkern- und/oder Bohrprozeß­parameter bildenden Daten versehen ist.1. Core drilling tool (5) for rock drilling in underground soil formations, with an outer tube (6), which can be connected at its upper end via connecting means to the lower end of a drill pipe string (3) which can be set in drive revolutions and at its lower end with a core drill bit (7) and with an inner tube (8), which forms a separate unit that can be brought to light, and a support part (18), which is supported in the outer tube (6) with it, and a core tube part (20 that is non-rotatably suspended from it by means of a bearing relative to the outer tube (6) ) for receiving a drilled core (9), characterized in that the core tube part is provided with a measuring unit (10) arranged in its upper region for on-site detection, processing and storage of data forming borehole, core and / or drilling process parameters . 2. Werkzeug nach Anspruch 1, dadurch gekennzeichnet, daß die Meßeinheit (10) Meßwertaufnehmer (30) für die Er­fassung von Bohrlochtemperatur, Bohrlochneigung, Bohrloch­azimut und/oder Bohrfortschritt aufweist.2. Tool according to claim 1, characterized in that the measuring unit (10) has transducers (30) for the detection of borehole temperature, borehole inclination, borehole azimuth and / or drilling progress. 3. Werkzeug nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß die Meßeinheit (10) Meßwertaufnehmer (30) für die Erfassung von Bohrandruck, Drehmoment und/oder Drehzahl des Außengehäuses umfaßt.3. Tool according to claim 1 or 2, characterized in that the measuring unit (10) comprises transducers (30) for the detection of drilling pressure, torque and / or speed of the outer housing. 4. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Meßeinheit (10) Meßwertaufnehmer (30) für die Erfassung von Informationen über die Gesteinsbeschaffenheit der Bodenformation aufweist.4. Tool according to one or more of claims 1 to 3, characterized in that the measuring unit (10) has transducers (30) for the acquisition of information about the rock structure of the ground formation. 5. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Meßeinheit (10) Meßwertaufnehmer (30) für die Erfassung von Kerngewinn, Kernfortschritt, Kernverklemmung, Kernorientierung und/oder Kernbeschaffenheit umfaßt.5. Tool according to one or more of claims 1 to 4, characterized in that the measuring unit (10) comprises transducers (30) for detecting core gain, core progress, core jamming, core orientation and / or core quality. 6. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Meßeinheit (10) mit dem Innenrohr (8) gemeinsam mechanisch aufziehbar oder hydraulisch mittels der Bohrspülung zutage förderbar ist.6. Tool according to one or more of claims 1 to 5, characterized in that the measuring unit (10) with the inner tube (8) can be mechanically wound together or can be conveyed hydraulically by means of the drilling fluid. 7. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß bei Verwendung eines mittels einer Fangvorrichtung (12) mit dem Innenrohr (8) verbindbaren Zugmittels (11) dieses eine Leitung zur Meß­datenübertragung an die Oberfläche umfaßt.7. Tool according to one or more of claims 1 to 6, characterized in that when using a traction means (11) which can be connected to the inner tube (8) by means of a catching device (12), this comprises a line for measuring data transmission to the surface. 8. Werkzeug nach Anspruch 7, dadurch gekennzeichnet, daß die Fangvorrichtung (12) und die Meßeinheit (10) beim Fangen des Innenrohrs (8) in Datenübertragungseingriff gelangende Verbindungsmittel aufweisen.8. Tool according to claim 7, characterized in that the catching device (12) and the measuring unit (10) when catching the inner tube (8) in connection with data transmission intervention. 9. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Meßeinheit (10) zu ihrer Energieversorgung mit wiederaufladbaren elek­trischen Batterien (33) versehen ist.9. Tool according to one or more of claims 1 to 8, characterized in that the measuring unit (10) is provided with rechargeable electric batteries (33) for its energy supply. 10. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Meßeinheit (10) zu ihrer Energieversorgung mit einem von der Bohrspülung antreibbaren elektrischen Generator versehen ist.10. Tool according to one or more of claims 1 to 8, characterized in that the measuring unit (10) is provided for its energy supply with an electrical generator which can be driven by the drilling fluid. 11. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Meßeinheit (10) zumindest einen durch eine Wärmeschutzvorrichtung abge­schirmten Bereich für die Aufnahme wärmeempfindlicher Bau­teile aufweist.11. Tool according to one or more of claims 1 to 10, characterized in that the measuring unit (10) has at least one area shielded by a heat protection device for receiving heat-sensitive components. 12. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß wärmeempfindliche Bau­teile der Meßeinheit (10) mit eigenen Wärmeschutzvorrich­tungen versehen sind.12. Tool according to one or more of claims 1 to 10, characterized in that heat-sensitive components of the measuring unit (10) are provided with their own heat protection devices. 13. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Meßeinheit (10) mit einem Druckpulserzeuger zur Erzeugung von oberirdisch mittels Sensoren meßbaren, ausgewerteten Meßdaten ent­sprechenden Druckpulsen in der Bohrspülung gekoppelt ist.13. Tool according to one or more of claims 1 to 12, characterized in that the measuring unit (10) is coupled to a pressure pulse generator for generating above-ground, measurable by means of sensors, evaluated measurement data corresponding pressure pulses in the drilling fluid. 14. Werkzeug nach einem oder mehreren der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß die Meßeinheit (10) mittels eines gesonderten Fangwerkzeugs unterirdisch erfaß­bar, aus dem Kernrohrteil (20) auslösbar und für sich zutage förderbar ist.14. Tool according to one or more of claims 1 to 13, characterized in that the measuring unit (10) can be detected underground by means of a separate catching tool, can be triggered from the core tube part (20) and can be conveyed to itself.
EP19890106285 1988-04-22 1989-04-10 Core-drilling tool Withdrawn EP0338367A3 (en)

Applications Claiming Priority (2)

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DE3813508A DE3813508C1 (en) 1988-04-22 1988-04-22
DE3813508 1988-04-22

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EP0338367A2 true EP0338367A2 (en) 1989-10-25
EP0338367A3 EP0338367A3 (en) 1991-03-27

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EP (1) EP0338367A3 (en)
CA (1) CA1327035C (en)
DE (1) DE3813508C1 (en)
NO (1) NO891657L (en)

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Also Published As

Publication number Publication date
US4955438A (en) 1990-09-11
EP0338367A3 (en) 1991-03-27
CA1327035C (en) 1994-02-15
NO891657L (en) 1989-10-23
NO891657D0 (en) 1989-04-21
DE3813508C1 (en) 1989-10-12

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