EP0241354B1 - Vorrichtung zum gleichzeitigen Bohren und Verrohren - Google Patents

Vorrichtung zum gleichzeitigen Bohren und Verrohren Download PDF

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Publication number
EP0241354B1
EP0241354B1 EP87400713A EP87400713A EP0241354B1 EP 0241354 B1 EP0241354 B1 EP 0241354B1 EP 87400713 A EP87400713 A EP 87400713A EP 87400713 A EP87400713 A EP 87400713A EP 0241354 B1 EP0241354 B1 EP 0241354B1
Authority
EP
European Patent Office
Prior art keywords
ring
casing
casing section
drilling tool
shoulder
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
Application number
EP87400713A
Other languages
English (en)
French (fr)
Other versions
EP0241354A1 (de
Inventor
Jean Pierre Parant
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.)
Societe Nationale Elf Aquitaine Production SA
Original Assignee
Societe Nationale Elf Aquitaine Production SA
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 Societe Nationale Elf Aquitaine Production SA filed Critical Societe Nationale Elf Aquitaine Production SA
Publication of EP0241354A1 publication Critical patent/EP0241354A1/de
Application granted granted Critical
Publication of EP0241354B1 publication Critical patent/EP0241354B1/de
Expired 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/20—Drives for drilling, used in the borehole combined with surface drive
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives

Definitions

  • the present invention relates to a simultaneous drilling and casing device.
  • drilling is done first to a certain depth, then the casing is lowered and anchored to the ground by cementing.
  • the known methods are not suitable for horizontal drilling.
  • the object of the present invention is to remedy these drawbacks by proposing a method aimed at the simultaneous laying of the casing as the drilling progresses, by endowing the end of the casing with a drilling string which is spawning its way by itself, since it is rotated.
  • the simultaneous drilling and casing device usable after the installation of a first casing section on an already drilled part of the well, either by conventional means, or by application of the present device, and comprising a motor bottom driving a drilling tool, also comprising a casing section the front end of which is provided with an abrasive lining ring and the rear end is joined by a connection with a means for driving in rotation said section is characterized in that.
  • said means for rotating the casing section consists of a drilling column driven in rotation by a rotation table and comprising hollow rods, the last of which is screwed onto the stator of the downhole motor, so that the section casing driven by the drill string rotates at a reduced speed compared to the speed at which rotates the drilling tool driven by the downhole motor.
  • GB - A 2 054 008 discloses a turbine coring device comprising a downhole motor driving in rotation a tubular body carrying a coring ring and secured by means of a connection with another follower tube carrying a ring d bore, so that the tubular body and the follower tube rotate at the same speed.
  • This device differs from the device according to the present invention in that the tube carrying the abrasive lining ring is driven not by the bottom turbine but at a much slower speed by means of a rotation table.
  • the drill stand comprises, as usual, hollow drill pipes which are driven by means of the rotation table.
  • a drill string not shown, carries at its end a drive connector 10 made of mild steel to which it is fixed by means of the end 11 of said connector.
  • the central part of the connector 10 carries an external thread 12. By means of this thread is screwed the rear part 1a of a casing section 1 provided with an internal thread.
  • the rear part 1 a has, for reasons of solidity, a thickness greater than that of the remaining part of the section 1.
  • a hard steel ring 13 fixed to the connector by means of a pin 14. This ring bears on a shoulder 15 which has the upper part of the connector. Between the ring 13 and the thread 12 is a seal 16.
  • the slide 19 is followed by two drill collars 20. At the end of each drill collar is inserted a short hollow rod coated with a sleeve 21 of hard rubber with a diameter large enough to allow centering and the recovery of torque in favor of the casing rotating at the same speed as the drill stand.
  • a bottom motor 22 rotated by a hydraulic fluid circulating in the hollow rods of the column and comprising, in order, an upper part of stator 23 , a stator 24 and a rotor 25.
  • the upper part 23 carries a ring with longitudinal grooves 26 serving as abutments. In fact, when the casing section 1 is correctly screwed onto the connector 10, the projecting parts of said grooves 26 bear on an internal shoulder 2 which the casing section 1 has at this level.
  • the stator 24 and the rotor 25 form a ball bearing 27.
  • a drilling tool 28 via the upper part 29 of the tool.
  • the central part of the drilling tool 28 carries a bronze centering ring 30, free to rotate and whose outside diameter is only a few tenths of a millimeter less than the inside diameter of the casing.
  • the front end of the casing section 1 carries a crown 3 with an abrasive lining.
  • the rotor 25 is provided with vents 31 distributed concentrically and which are intended for the flow of the hydraulic fluid in front of the crown 3 to release the cutting face.
  • the distance separating the connector 10 from the drilling tool 28 is calculated in such a way that, when the screwing of the part 1 a of the section 1 is correctly carried out, the projecting parts of the grooves 26 bear on the shoulder 2, the ring 30 is at the level of the crown 3 and the distance between the end of the crown 3 and that of the tool 28 takes a predetermined value.
  • the thread 12 undergoes considerable stresses during the operation of the rotational driving of the casing.
  • a hard steel ring is placed against the shoulder of this fitting so as to reduce the risk of such deformation.
  • the drive fitting 10 is a cylindrical fitting of a safety seal whose application is conventional in the field of drilling.
  • This cylindrical connection has a lower unscrewing torque than that of the conical connections by means of which the drilling rods are connected. Therefore, by exerting a torque in the opposite direction to the direction applied during drilling, we manage to separate the casing from the fitting, without the connection of the rods being affected.
  • the bronze ring 30 has an important role. Indeed, the tool driven by the rotor rotating at around 400 rpm and the crown rotating at around 40-60 rpm, it is important that there is no direct contact between the two and that the crown does not come to damage part of the drilling tool.
  • the process for implementing the device described is as follows. A part of the well having already been drilled and a section of casing 5 ending in a shoe 6 having been laid and cemented, the section of casing 1 is lowered into the borehole and the drill pipe is assembled to the surface.
  • the new casing section 1 will have a smaller diameter than that of the section 5 already laid and a drive fitting 10 is adapted accordingly.
  • said connector 10 is fixed, then all the elements of the drill string are fixed to the connector, such as the drill rod 18, the slide 19 in the extended position, the rod masses 20 followed by sleeves. 21, the downhole motor 22 and the drilling tool 28.
  • the column thus assembled is lowered inside the casing 1 and the rear part 1 a of the casing 1 is screwed onto the thread 12 of the connector 10.
  • the drilling is finished, the depth drilled corresponding to the length of the section 1, the drilling is stopped and the drill string is rotated in the opposite direction to the direction of the previous rotation.
  • the drill string After unscrewing the fitting, the drill string is removed from the well so as to leave in the well only the section of casing, the end of which carries a female thread.
  • This thread then makes it possible to connect to the casing of various well treatment equipment, for example for cementing, perforation or acidification. This result is particularly advantageous, because it allows great precision in identifying the level at which one wishes to act.

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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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Claims (7)

1. Vorrichtung zum gleichzeitigen Bohren und Verrohren zur Verwendung nach dem Einbringen in einen bereits gebohrten Teil des Schachtes eines ersten Verrohrungsabschnittes, entweder mit konventionellen Mitteln oder durch Einsatz der vorliegenden Vorrichtung, gefolgt von einer Zementierung, wobei diese Vorrichtung einen Untertagemotor (22) aufweist, der ein Bohrwerkzeug (28) antreibt, sowie einen Verrohrungsabschnitt (1), dessen vorderes Ende eine mit einer Schleifvorrichtung versehene Dammkrone (3) aufweist, während das hintere Ende (1a) über einen Anschluß (11) mit einer Rotationsvorrichtung für den Rohrabschnitt ausgerüstet ist, dadurch gekennzeichnet, dass die Rotationsvorrichtung für den Verrohrungsabschnitt (1) aus einer Bohrsäule besteht, die durch einen Drehtisch in Rotationsbewegung versetzt wird, und die Hohlspindeln aufweist, deren letztere an dem Stator (23) des Untertagemotors (22) verschraubt ist, so dass der durch die Bohrsäule angetriebene Verrohrungsabschnitt (1) sich im Vergleich zu der Drehgeschwindigkeit des durch den Untertagemotor (22) angetriebenen Bohrwerkzeuges (28) mit reduzierter Geschwindigkeit dreht.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Antriebsstutzen (10) oberhalb seines Gewindes (12) mit einer Schulter (15) versehen ist, an der sich ein an dem Stutzen befestigter Ring aus Hartstahl (13) abstützt, so dass nach dem Verschraubungsvorgang die Oberkante des Verrohrungsabschnittes an diesem Ring aufliegt.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass an dem Teil, der zwischen dem Stutzen (10) und dem Bohrwerkzeug (28) liegt, mindestens eine Muffe (21) aus elastischem Werkstoff angeordnet ist, deren Durchmesser ausreichend gross ist, um die Aufhahme eines Momentes zugunsten des Verrohrungsabschnittes (1) zu gewährleisten, dessen Rotationsgeschwindigkeit weitgehend gleich derjenigen der Bohrsäule ist.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Unteragemotor (22) einen Teil des Stators (23) enthält, der auf seiner Aussenseite einen Kreis von Längsschlitzen (26) aufweist, der über seinen Umfang verteilt ist, während die Innenwand des Verrohrungsabschnittes (1) eine Innenschulter (2) aufweist, die als Auflage für die vorspringenden Teile der Längsschlitze (26) des Kreises dient, wobei der Abstand zwischen dieser Schulter (2) und dem Ende der mit Schleifmitteln ausgerüsteten Dammkrone (3) des Verrohrungsabschnittes (1) so beschaffen ist, dass, wenn die hervorspringenden Teile (26) an dieser Schulter anliegen, die mit Schleifmitteln ausgerüstete Dammkrone (3) sich in einem vorbestimmten Abstand oberhalb des Endes des Bohrwerkzeuges befindet.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass an der Oberseite der Bohrsäule, die zwischen dem Antriebsstutzen (10) und dem Bohrwerkzeug (28) liegt, eine teleskopische Gleitführung (19) zwischengeschaltet ist, deren Längenveränderung die Auflage der vorspringenden Teile der Längsschlitze (26) auf der Schulter (2) des Verrohrungsabschnittes am Ende des verschraubungsvorganges ermöglicht.
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass an dem Teil des Bohrwerkzeuges, das sich weitgehend auf der Höhe der mit Schleifmitteln versehenen Dammkrone (3) befindt, freidrehend ein drehender Zentrierring (30) aus Bronze montiert ist, dessen Aussendurchmesser um einige Zehntel Millimeter geringer ist, als der Innendurchmesser dieses Kreises.
7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Rotor (25) des Untertagemotors (22) mit an der Oberfläche austretenden Entsorgungsmitteln (31) ausgerüstet ist, die den Aushub des Bohrmaterials vor dem Kreis (3) mittels der Hydraulikflüssigkeit ermöglichen, mit der der Motor angetrieben wird.
EP87400713A 1986-04-02 1987-04-01 Vorrichtung zum gleichzeitigen Bohren und Verrohren Expired EP0241354B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8604678 1986-04-02
FR8604678A FR2596803B1 (fr) 1986-04-02 1986-04-02 Dispositif de forage et cuvelage simultanes

Publications (2)

Publication Number Publication Date
EP0241354A1 EP0241354A1 (de) 1987-10-14
EP0241354B1 true EP0241354B1 (de) 1989-03-29

Family

ID=9333788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400713A Expired EP0241354B1 (de) 1986-04-02 1987-04-01 Vorrichtung zum gleichzeitigen Bohren und Verrohren

Country Status (7)

Country Link
US (1) US4842081A (de)
EP (1) EP0241354B1 (de)
CA (1) CA1274818A (de)
DE (1) DE3760084D1 (de)
FR (1) FR2596803B1 (de)
NO (1) NO177016C (de)
OA (1) OA08580A (de)

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CN114016920B (zh) * 2021-11-01 2024-04-09 中煤科工集团西安研究院有限公司 一种煤矿井下大直径套管下放装置及方法

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Also Published As

Publication number Publication date
NO871368L (no) 1987-10-05
FR2596803B1 (fr) 1988-06-24
US4842081A (en) 1989-06-27
NO177016C (no) 1995-07-05
FR2596803A1 (fr) 1987-10-09
OA08580A (fr) 1988-09-30
DE3760084D1 (en) 1989-05-03
NO177016B (no) 1995-03-27
EP0241354A1 (de) 1987-10-14
NO871368D0 (no) 1987-04-01
CA1274818A (fr) 1990-10-02

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