EP1227216A1 - Bohrgestänge zur Informationsübertragung - Google Patents

Bohrgestänge zur Informationsübertragung Download PDF

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Publication number
EP1227216A1
EP1227216A1 EP02290127A EP02290127A EP1227216A1 EP 1227216 A1 EP1227216 A1 EP 1227216A1 EP 02290127 A EP02290127 A EP 02290127A EP 02290127 A EP02290127 A EP 02290127A EP 1227216 A1 EP1227216 A1 EP 1227216A1
Authority
EP
European Patent Office
Prior art keywords
drill string
electrical
electrode
mud
rod
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Withdrawn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
EP02290127A
Other languages
English (en)
French (fr)
Inventor
Giovanni Aiello
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.)
Soletanche Freyssinet SA
Original Assignee
Compagnie du Sol SARL
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 Compagnie du Sol SARL filed Critical Compagnie du Sol SARL
Publication of EP1227216A1 publication Critical patent/EP1227216A1/de
Withdrawn legal-status Critical Current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
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency

Definitions

  • the present invention relates to a drill string equipped with information transmission means.
  • a drill string is shown formed by the rod 10a constituting the lower rod, the rod 10b constituting the upper rod and intermediate rods.
  • a drilling tool 12 is attached at the lower end of the rod 10a and includes measurement sensors 14.
  • the internal face 16 of the rods 10 is coated with a layer of material insulator 18 over the entire length of the drill string.
  • the train rods is of course arranged inside the well being drilled 20 which is filled with an electrically conductive drilling mud 22.
  • the insulating layer 16 constitutes a closed current loop consisting firstly in drilling mud 30 filling the inside of the rods 10 and on the other hand by the assembly constituted by the same wall of the rods 10 and by the mud 32 outside the rods 10.
  • An object of the present invention is to provide a drill string of the type mentioned above which is equipped with means for transmission of information between the bottom of the well in which is located equipment and ground surface, which improve transmission of this information, especially regarding the interface between the transmitter and receiver and the mud used for the transmission of information.
  • the drill string is characterized in that said first electrical assembly comprises at least one first annular electrode secured to the insulating internal face of the drill string, said electrode being in electrical contact with the mud contained in the drill string; and means for applying to said electrode a voltage representative of said information to be transmitted.
  • the information to be transmitted is applied as a voltage to the emitting annular electrode arranged at the lower end of the drill string.
  • This tension by relative to mass, induces a current in the closed current loop defined above, this current being modulated as a function of the information to be transmitted.
  • Reception, at the upper end of the train of rods, can be produced, as in the state of the art mentioned, by an electromagnetic coupling coil placed inside the drill string, this coil surrounding the mud contained in the drill string rods, mud in which the current flows.
  • a second solution in accordance with the invention consists in have, on the insulating internal face of a rod arranged near the upper end of the drill string, two conductive electrodes axially offset. The difference in potential that appears between these two electrodes is created by the current flowing in the loop current. This potential difference is therefore itself modulated like current, based on information received.
  • the electrical assembly arranged at the bottom of the rod train and the electrical assembly arranged at the upper end of the drill string can both be consisting of two conductive electrodes mounted inside the insulating internal face of the rods.
  • one of the electrodes can serve as a transmitter for the transmission of information and alternatively two electrodes can serve as receivers of information to pass.
  • FIG 2 there is shown in a simplified manner the borehole 40 in progress.
  • the drill string with, more particularly, the lower rod T I on which is mounted the drilling tool, not shown in the figure, and the upper rod T S.
  • Intermediate rods are of course interposed between these two end rods.
  • Each rod is constituted by a conductive metal wall 42 on the internal face of which an insulating layer 44 is produced.
  • borehole 40 is filled with mud more or less conductive of the electricity which fills in particular the interior 46 of the drill string as well as the annular space 48 between the drill string and the wall of the borehole 40.
  • a closed conductive loop is thus produced constituted on the one hand by the mud in the internal zone 46 and, on the other hand, by the conductive wall 42 and the mud in the external annular space 48.
  • These two branches of the electrical conductor circuit are separated by the insulating layer 44 and are connected at their lower ends by the tool itself and superior by suitable means.
  • 40F the bottom of the borehole and 40S the upper end drilling close to the surface of soil S.
  • the lower electrical assembly consists of an electrode, preferably annular 50, which is fixed by any suitable means to the insulating wall 44 of the rod T I.
  • This electrode is directly in electrical contact with the mud contained inside 46 of the drill string.
  • this electrode is placed at a sufficient distance from the drilling tool.
  • an electromagnetic coupling coil 52 at the upper end of the drill string. It is understood that, for the transmission of information from the bottom of the borehole near the tool to the upper part of the borehole, that is to say towards the surface of the ground, a modulated electric voltage corresponding to the information to be transmitted is applied to the electrode 50. This electric voltage creates in the zone 46 a modulated electric current which circulates according to the current loop defined above.
  • This current crosses in particular the zone surrounded by the electromagnetic coil 52.
  • the circulation of this modulated current creates at the terminals of the coil 52 an electric voltage which is representative of the information emitted by the electrode 50. It is understood that s overcomes the problems mentioned above with regard to the emission corresponding to the poor electromagnetic coupling between the current loop and the coil provided in the prior art for the transmission of information. On the other hand, this poor quality coupling is less unfavorable as regards reception by the electromagnetic coil 52.
  • a second annular electrode 54 fixed to the insulating wall 44 of this rod.
  • the electrode 54 is axially offset by a distance d with respect to the emitting electrode 50.
  • an alternating current is applied to the coil 52, the latter induces in the mud zone 46 a current having the same modulation which flows in the current loop defined above.
  • the circulation of this current creates between the electrodes 50 and 54 a potential difference which can be collected and which has the same modulation as the current initially applied to the coil 52.
  • the electrodes 50 and 54 fixed on the insulating wall 44 of the conductive wall 42 of the drill pipe. It is possible, in the wall 42 of the rod, or in a insert on the rod, define by any suitable means a cavity or the like 56 substantially opposite the electrode 50. In this cavity 56, a number of electrical components are mounted or electronic reference 58. These components are connected by electrical conductors 60 and 62 to electrodes 50 and 54. These components 58 are also connected by sets of conductors electrical 64 and 66, on the one hand, to the sensors arranged in the tool and, on the other hand, possibly to activators also mounted in this tool.
  • circuits 58 receive the coded information to be transmitted and develop the corresponding electrical voltage to apply it to the emission electrode 50 and thus inject a modulated current into the closed conductive loop.
  • the circuits 58 are connected simultaneously with electrodes 50 and 54.
  • the circuits 58 include means for measuring the potential difference between the voltages collected by electrodes 50 and 54. This difference in potential including the modulations correspond to the information received can be coded or transform appropriately by circuits 58 to be transmitted to activators of the tool via the electrical connection 66.
  • FIG 4 there is shown the upper part of the train rods with the rod Ts provided with its coil 52, a standard rod T which is engaged in the drilling head 80 used to control the setting in rotation of the drill string and the descent of this drill string.
  • a rotating collector 84 is provided which surrounds the rod T and which is electrically connected to the processing unit 84.
  • the assembly lower electric referenced 70 consists essentially of electrodes 50 and 54 as already described in connection with FIG. 2 and 3.
  • the upper electrical assembly referenced 72 which is disposed at proximity to the ground surface is also formed by two electrodes annulars 74 and 76 substantially identical to electrodes 50 and 54 and fixed on the insulating coating 44 of the upper drill rods Ts.
  • the electrode 74 will be used alone for the transmission of information from the surface as the emission electrode 50 is used.
  • we use the electrodes 74 and 76 for receiving information sent from the bottom of the borehole.
  • the difference in modulated potential collected between these two electrodes and created by the circulation of the modulated current produced by the emitting electrode of the lower electrical assembly 70 constitutes the information received which is of course representative of the information sent by the lower electrical assembly 70.
  • the annular electrodes are shown projecting with respect to the insulating layer 44.
  • the insulating layer 44 has a thickness sufficient for the inner face to have electrodes flush with the inner face of the insulating layer.
  • the thickness of the portion of insulating layer between the electrode and the wall of the rod must be sufficient to achieve the desired electrical insulation. This avoids the creation of pressure drops in the rod.
  • the annular electrode is made with a material that conducts electricity well, for example brass, the internal surface of which has been treated, for example by nitriding, to give this surface sufficient hardness allowing it to resist the abrasive effect of the liquid circulating in the rod.
  • a material that conducts electricity well for example brass, the internal surface of which has been treated, for example by nitriding, to give this surface sufficient hardness allowing it to resist the abrasive effect of the liquid circulating in the rod.
  • the width I of the electrodes in the direction of the axis of the rod is greater than or equal to 2D, D being the internal diameter of the pipe.
  • the distance d between the two electrodes is as large as possible.
  • this distance is limited since it is necessary, for obvious practical reasons, for the two electrodes to be mounted on the same rod of the rod train. This distance will therefore depend on the length of the lower rod Ti and the upper rod Ts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Earth Drilling (AREA)
EP02290127A 2001-01-26 2002-01-18 Bohrgestänge zur Informationsübertragung Withdrawn EP1227216A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0101067A FR2820167B1 (fr) 2001-01-26 2001-01-26 Train de tiges de forage permettant la transmission d'informations
FR0101067 2001-01-26

Publications (1)

Publication Number Publication Date
EP1227216A1 true EP1227216A1 (de) 2002-07-31

Family

ID=8859271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02290127A Withdrawn EP1227216A1 (de) 2001-01-26 2002-01-18 Bohrgestänge zur Informationsübertragung

Country Status (4)

Country Link
US (1) US6958703B2 (de)
EP (1) EP1227216A1 (de)
FR (1) FR2820167B1 (de)
HK (1) HK1049870A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047568A1 (de) 2010-04-12 2011-12-15 Peter Jantz Einrichtung zur Übertragung von Informationen über Bohrgestänge

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2871842B1 (fr) 2004-06-21 2006-08-11 Giovani Aiello Train de tiges apte a la transmission a haut debit d'informations dans un puits de forage
US7518528B2 (en) * 2005-02-28 2009-04-14 Scientific Drilling International, Inc. Electric field communication for short range data transmission in a borehole
EP1748151B1 (de) * 2005-07-29 2010-01-06 Services Pétroliers Schlumberger Verfahren und Vorrichtung zum Senden oder Empfangen von Information zwischen ein Bohrlochmessgerät und der Oberfläche
NO20100691A1 (no) * 2010-05-12 2011-11-14 Roxar Flow Measurement As Overforings-system for kommunikasjon mellom borehullselementer
CN105116451A (zh) * 2015-07-20 2015-12-02 中煤科工集团西安研究院有限公司 基于绝缘短节的孔中随钻电法勘探电极装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4578675A (en) * 1982-09-30 1986-03-25 Macleod Laboratories, Inc. Apparatus and method for logging wells while drilling
EP0295178A2 (de) * 1987-06-10 1988-12-14 Schlumberger Limited Gerät und Verfahren zur Signalübertragung in einem Bohrloch mit Röhren
FR2777594A1 (fr) * 1998-04-17 1999-10-22 Sol Comp Du Installation de transmission d'informations dans un puits de forage
EP0964134A2 (de) * 1998-06-12 1999-12-15 Schlumberger Technology B.V. Leistungs- und Signalübertragung von einer isolierten Leitung für Dauerbohrloch-anlagen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3518609A (en) * 1968-10-28 1970-06-30 Shell Oil Co Telemetry drill pipe with ring-control electrode means
US3866678A (en) * 1973-03-15 1975-02-18 Texas Dynamatics Apparatus for employing a portion of an electrically conductive fluid flowing in a pipeline as an electrical conductor
US4095865A (en) * 1977-05-23 1978-06-20 Shell Oil Company Telemetering drill string with piped electrical conductor
ZA823430B (en) * 1981-05-22 1983-03-30 Coal Industry Patents Ltd Drill pipe sections
US4483393A (en) * 1982-09-24 1984-11-20 Exploration Logging, Inc. Well logging apparatus and method for making same
US4575681A (en) * 1982-11-12 1986-03-11 Teleco Oilfield Services Inc. Insulating and electrode structure for a drill string

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4578675A (en) * 1982-09-30 1986-03-25 Macleod Laboratories, Inc. Apparatus and method for logging wells while drilling
EP0295178A2 (de) * 1987-06-10 1988-12-14 Schlumberger Limited Gerät und Verfahren zur Signalübertragung in einem Bohrloch mit Röhren
FR2777594A1 (fr) * 1998-04-17 1999-10-22 Sol Comp Du Installation de transmission d'informations dans un puits de forage
EP0964134A2 (de) * 1998-06-12 1999-12-15 Schlumberger Technology B.V. Leistungs- und Signalübertragung von einer isolierten Leitung für Dauerbohrloch-anlagen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047568A1 (de) 2010-04-12 2011-12-15 Peter Jantz Einrichtung zur Übertragung von Informationen über Bohrgestänge
US9982529B2 (en) 2010-04-12 2018-05-29 Universitaet Siegen Communication system for transmitting information via drilling rods

Also Published As

Publication number Publication date
HK1049870A1 (zh) 2003-05-30
FR2820167B1 (fr) 2004-06-04
US6958703B2 (en) 2005-10-25
US20020105334A1 (en) 2002-08-08
FR2820167A1 (fr) 2002-08-02

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