EP0440123B1 - Vorrichtung zur Übertragung von Signalen in einem Bohrloch - Google Patents

Vorrichtung zur Übertragung von Signalen in einem Bohrloch Download PDF

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Publication number
EP0440123B1
EP0440123B1 EP19910101043 EP91101043A EP0440123B1 EP 0440123 B1 EP0440123 B1 EP 0440123B1 EP 19910101043 EP19910101043 EP 19910101043 EP 91101043 A EP91101043 A EP 91101043A EP 0440123 B1 EP0440123 B1 EP 0440123B1
Authority
EP
European Patent Office
Prior art keywords
tubes
drill line
electrically
electrically conductive
fixed
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
EP19910101043
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0440123A1 (de
Inventor
Rainer Dr. Jürgens
Dagobert Feld
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 Holdings LLC
Original Assignee
Baker Hughes Inc
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 Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of EP0440123A1 publication Critical patent/EP0440123A1/de
Application granted granted Critical
Publication of EP0440123B1 publication Critical patent/EP0440123B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/60—Connections between or with tubular conductors
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/003—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings with electrically conducting or insulating means
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/18—Pipes provided with plural fluid passages

Definitions

  • the invention relates to a device for, in particular, shaft drilling with a drill string, which comprises inner tubes which delimit inner flow spaces and which enclose outer tubes with spacing to form outer flow spaces, according to the preamble of claim 1.
  • Devices of the aforementioned type with a drill string of double-walled drill pipes to be attached to one another are used, for example, for shaft drilling, the double-walled drill pipe comprising an outer pipe and an inner pipe and a flushing medium generally being pumped to the bottom of the hole in the annular space between the inner pipe and the outer pipe, past the drill head can flow into the inner flow space bounded by the inner pipe and can convey the cuttings to the surface through the inner flow space.
  • drilling strings with such double-walled drilling pipes information is to be acquired in the course of the drilling process and is to be passed on electrically to the earth's surface for conversion into control signals, special cables for the electrical transmission of Provide measurement and control signals.
  • EP-A-0 257 744 discloses a drilling device with a drill string which has an inner tube and an outer tube.
  • the inner and outer tubes are spaced apart and held together by spacer elements.
  • Special line elements are provided for the transmission of signals from the bottom of the borehole to the surface of the earth.
  • a line element is arranged at a distance from the inner tube and the outer tube, so that flow spaces are created for a medium which in turn has to take care of insulation of the line element.
  • the line element is provided with an outer insulation and is arranged like a segment of a circle between the inner tube and the outer tube.
  • the design of the device according to the invention enables the transmission of measurement and control signals and also of energy between the surface of the earth or the mouth of the borehole and the bottom of the borehole in a wear-resistant manner, without the need for transmission cables which are particularly susceptible to faults.
  • the mutually insulated inner and outer tubes of the tubing form the electrical conductors of a two-wire system, which also in areas of rotary unions, for. B. rotary drive, drill head and the like.
  • the electrical insulation is to be provided in a simple manner.
  • the electrical insulation between the inner and outer tubing can be implemented in a structurally simple manner by the electrically non-conductive design of the spacers.
  • the spacers can be produced, for example, by producing the spacers from an electrically non-conductive material, for example plastic and the like, or by means of a suitable coating, for example an epoxy resin coating, of a metallic spacer core. If it is necessary in certain applications, e.g. due to the necessity of guiding a medium in the external flow space between the inner surface of the outer tube and the outer surface of the inner tube with electrical conductivity, the inner and outer surface including the spacers must be covered with an electrically non-conductive material to avoid energy losses, for example coat.
  • an electrically non-conductive material for example plastic and the like
  • a suitable coating for example an epoxy resin coating
  • the inner tubes to be connected to one another at their ends are to be provided at the ends with electrical contacts which ensure a functionally reliable, automatic electrical connection when fastening the drill string via the threads of the outer tubes.
  • contact elements in the form of electrically conductive worm springs or electrically conductive contact surfaces made of, for example, copper are used in the inner tubes, which are to be arranged in the outer recesses of the inner tubes and, after insertion into the recesses, protrude to a slight extent beyond the edge of the recesses in such a way that after fitting a corresponding end of an inner tube on the associated end of the adjacent inner tube, the worm spring or the fan element is compressed slightly, with which a secure contact connection goes hand in hand in the rough everyday operation of such a device without additional assembly work.
  • electrical contact units such as slip ring transmission unit, induction coil transmission unit and the like, can be used, in particular in circumstances in which different speeds between the drill string and the measuring transducer or transducer are to be taken into account Find.
  • the exemplary embodiment illustrated in the drawing of the drilling device is designed as a shaft drilling device with a drill bit 2 and a drilling drive 3.
  • the drill string generally numbered 4, consists of double-walled tubes 5 which are screwed together.
  • the double-wall tubes 5 have outer tubes 6 and inner tubes 7.
  • the inner tube delimits an inner flow space 8.
  • the outer tube 6 encasing the inner tube 7 at a distance, together with the inner tube, delimits an annular outer flow space 9.
  • the inner tube 7 is supported on the outer tube by spacers 10 made of an electrically non-conductive material.
  • the inner tube 7 carries a perforated centering piece 11 at its upper end in order to hold the inner tube 7 radially and axially.
  • This centering piece 11 also forms a non-conductive spacer 10.
  • the sleeve element which is placed on the pin of the following tube.
  • a centering piece 13 is also provided, which is also made of plastic and also forms spacers 10.
  • the spigot and socket part of the inner tube are arranged in relation to the outer tube 6 in such a way that the inner connection is automatically centered when the outer tubes 6 are screwed on and can therefore be introduced without additional measures.
  • the sleeve and pin elements lie in a flow direction 14 of a z. B. flushing medium favorable arrangement.
  • the outer tubes 6 and the inner tubes 7 made of a metallic material are, however, as mutually insulated electrical conductors for the transmission of measurement and control signals also energy, for example, formed between the surface of the earth and the bottom of the borehole during the drilling operation.
  • the spacers 10 are not electrically conductive, so that the inner tubes 7 and the outer tubes 6 can transmit measurement and control signals as conductors of a two-wire system.
  • a secure electrical connection is made at all connection points of inner and outer tubes 6, 7.
  • the threaded connections 15 of the outer tubes 6 are provided with an electrically conductive thread grease.
  • a first mold recess 16 and a second mold recess 17 are provided in the lateral surface.
  • a worm spring 19 can be inserted into the mold recess 16 and, after fitting an adjacent inner tube, ensures a secure electrical connection of the interconnected inner tubes 7.
  • An O-ring 18 is arranged in the mold recess for sealing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Earth Drilling (AREA)
EP19910101043 1990-01-31 1991-01-28 Vorrichtung zur Übertragung von Signalen in einem Bohrloch Expired - Lifetime EP0440123B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4002795 1990-01-31
DE19904002795 DE4002795C1 (enrdf_load_stackoverflow) 1990-01-31 1990-01-31

Publications (2)

Publication Number Publication Date
EP0440123A1 EP0440123A1 (de) 1991-08-07
EP0440123B1 true EP0440123B1 (de) 1994-05-18

Family

ID=6399123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910101043 Expired - Lifetime EP0440123B1 (de) 1990-01-31 1991-01-28 Vorrichtung zur Übertragung von Signalen in einem Bohrloch

Country Status (3)

Country Link
EP (1) EP0440123B1 (enrdf_load_stackoverflow)
CA (1) CA2035412A1 (enrdf_load_stackoverflow)
DE (1) DE4002795C1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6581454B1 (en) * 1999-08-03 2003-06-24 Shell Oil Company Apparatus for measurement
DE102010018383A1 (de) * 2010-04-26 2011-10-27 Ee Technologie Gmbh Bohr- oder Förderrohrgestänge
CN101824983A (zh) * 2010-05-06 2010-09-08 煤炭科学研究总院西安研究院 一种信号传输装置
WO2014046674A1 (en) * 2012-09-21 2014-03-27 Halliburton Energy Services, Inc. Pipe-in-pipe wired telemetry system
CN108442887B (zh) * 2018-03-22 2019-10-25 西南石油大学 一种可补偿自清洁式动力电钻杆
CN113027356A (zh) * 2021-03-30 2021-06-25 中原工学院 一种井下开采随钻测量无线传输钻杆及其应用
CN117005856A (zh) * 2023-08-17 2023-11-07 上海久卓机电设备有限公司 一种满足多介质高压输送及电信号传送的连续回转装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395861A (en) * 1941-06-12 1946-03-05 Cyrus H Fraser Transmission line joint
DE63444T1 (de) * 1981-04-10 1983-05-26 Framo Developments (U.K.) Ltd., London Elektrisch angetriebenes unterwasserpumpensystem.
JPS5864715A (ja) * 1981-10-12 1983-04-18 三菱電機株式会社 炭化水素地下資源電気加熱用電極装置の電気絶縁被覆された導管の製造法
US4683944A (en) * 1985-05-06 1987-08-04 Innotech Energy Corporation Drill pipes and casings utilizing multi-conduit tubulars
US4643843A (en) * 1985-06-03 1987-02-17 Lowdon Harold L Preparation for improving the reliability of electrical connections
GB8616006D0 (en) * 1986-07-01 1986-08-06 Framo Dev Ltd Drilling system
GB8714754D0 (en) * 1987-06-24 1987-07-29 Framo Dev Ltd Electrical conductor arrangements

Also Published As

Publication number Publication date
EP0440123A1 (de) 1991-08-07
CA2035412A1 (en) 1991-08-01
DE4002795C1 (enrdf_load_stackoverflow) 1991-05-23

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