EP0811744A1 - Procédé et dispositif pour le forage d'un trou dans des formations souterraines - Google Patents

Procédé et dispositif pour le forage d'un trou dans des formations souterraines Download PDF

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Publication number
EP0811744A1
EP0811744A1 EP96109150A EP96109150A EP0811744A1 EP 0811744 A1 EP0811744 A1 EP 0811744A1 EP 96109150 A EP96109150 A EP 96109150A EP 96109150 A EP96109150 A EP 96109150A EP 0811744 A1 EP0811744 A1 EP 0811744A1
Authority
EP
European Patent Office
Prior art keywords
drill pipe
pipe string
drilling tool
drill
drill bit
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Withdrawn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
EP96109150A
Other languages
German (de)
English (en)
Inventor
Friedhelm Dipl.-Ing. Makohl
Matthias Dipl.-Ing. Reich
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
Priority to EP96109150A priority Critical patent/EP0811744A1/fr
Priority to AU24700/97A priority patent/AU2470097A/en
Priority to NO972626A priority patent/NO972626L/no
Publication of EP0811744A1 publication Critical patent/EP0811744A1/fr
Withdrawn legal-status Critical Current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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor
    • 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

Definitions

  • the invention relates to a method and a device for sinking a borehole into underground formations by means of a drilling tool connected to the end of a rotatingly driven drill pipe string and having a drive motor for the drill bit accommodated in the housing thereof.
  • the drill pipe string When drilling boreholes into underground formations with a drilling tool of the type mentioned, to reduce the friction between the formation and the drill pipe string and to apply a counter-torque for the housing of the drilling tool, the drill pipe string is usually directed in a right-hand direction and thus in the same direction as the direction of rotation of the drill bit Usually offset relatively slow rotation, which increases the speed of the drill bit generated by the drive motor of the drilling tool.
  • the torque exerted by the drill pipe string on the housing of the drilling tool decreases due to the frictional effect of the formation on the drill pipe string with increasing length of the drill pipe string, so that only a progressively decreasing fraction of the torque introduced above ground is transmitted from the drill pipe string and as counter torque is available for the drive motor.
  • An increase in the torque introduced above ground is only possible to a limited extent for reasons of strength.
  • the invention is concerned with the problem of improving the torque loading of the drill pipe string and drilling tool. It solves the problem by a method with the features of claim 1 and by a device with the features of claim 8. With regard to further refinements, reference is made to claims 2 to 7 and 9 to 15.
  • the method and device according to the invention with the same maximum torque load on the drill pipe string, move the point of introduction for the torque setting the drill pipe string into rotation at the borehole end of the drill pipe string, with the result that there is a high counter-torque available for loading the rotary drill bit.
  • This enables significantly higher drilling performance and the achievement of longer ranges, since no residual torque is required as counter-torque at the upper end of the drill pipe string and accordingly the entire torque introduced into the drill pipe string at the end of the borehole for its rotation can be used to overcome the frictional force.
  • the device shown comprises in detail a drill pipe string 1, which is composed of individual, interconnected drill pipe sections 2, 3 and is connected at its lower end to a drilling tool 4.
  • a drive motor preferably a hydraulic drive motor 6 operated with drilling fluid
  • the drive shaft 6 'of which is led out of the housing 5 at a small acute angle to the central axis of the housing and a drill bit at its outer end 7 carries.
  • the drill pipe sections 2, 3 can be connected to one another in a conventional manner by screwing, but there is also the possibility of providing a connection 8 between the drill pipe sections 2, 3 that can be loaded in both directions of rotation and is designed, for example, as a wedge connection that is provided by a union nut 9 is secured. This is on an external thread part 10 of the drill pipe section 3 screwed on, as is illustrated schematically in detail E1. In principle, any type of connection that can be loaded in both directions of rotation can be used.
  • the drill pipe string 1 extends above ground through an above-ground drive, for example a turntable indicated schematically at 13, with the aid of which the drill pipe string 1 can optionally be driven in both directions of rotation.
  • a surface brake is also preferably provided above ground, which is illustrated schematically at 14 and interacts with the outer wall of the drill pipe string in an above ground area.
  • the braking device can comprise, for example, a brake shoe 11 which can be engaged by means of a lever 12 against the outer wall of the drill pipe string 1, as is schematically illustrated in detail E2, but can also have a design combined with the rotary drive 13.
  • the housing 5 of the drilling tool 4 is provided with a braking device 15, which, as is schematically illustrated in detail in detail E3, can have extendable braking members 16, for example, in engagement with the borehole wall.
  • the shaft part of the drill bit 7 can also be provided with a braking device 17, which comprises braking members 16 which can be engaged against the borehole wall, as are schematically indicated in detail in E3.
  • the brake members 16 can be designed as brake shoes or ribs.
  • the drill bit 7 is preferably equipped with cutting members 18 and 19, respectively, which have an angle of attack 20 which can be between a small negative and a small positive value, as indicated by the detail E4. In view of the high drive power available for the drill bit 7, such an embodiment makes a further contribution to increased drilling progress.
  • the drive motor 6 of the drilling tool 4 has a design for a comparatively higher output, so that the drive motor can simultaneously drive the drill bit 7 in a clockwise rotation and the drill pipe string 1 in a counterclockwise rotation.
  • the counterclockwise rotation of the drill pipe string 1 advantageously takes place at a speed which is a fraction of the speed of rotation of the drill bit 7.
  • the drill pipe string 1 is generally set to the left during straight drilling work.
  • the use of the brake device 14 can generate a torque counteracting the counterclockwise rotation of the drill pipe string 1, which torque lacks the counter torque that is required to build up a desired counter torque on the housing 5 of the drilling tool 4 required formation friction on the drill pipe string 1 substituted.
  • the braking torque entered into the drill pipe string above ground in the course of the day can be changed continuously to take account of all circumstances, and is in any case applied when the speed of the counterclockwise rotation of the drill pipe string 1 exceeds a predetermined maximum value.
  • the brake device 14 can be used instead of or instead of one Use of this Braking device 14, the braking device 15 provided on the housing 5 of the drilling tool 4, but which can also be provided at any point on the drill pipe string, is put into operation in order to generate the counter-torque required for the drive motor 6 for a high drilling performance.
  • the use of the brake device 15 has the advantage that the speed of the counterclockwise rotation of the drill pipe string 1 can be regulated without the surface application of the drill pipe string 1 with a corresponding torque applied by the brake device 14.
  • the braking device 15 can also be used as a speed limiter for the drill pipe string 1.
  • the brake device 17 on the shaft of the rotary drill bit 7 can, due to the braking action against the borehole wall, cause a required one Torque are built up, which can serve as a counter-torque for driving the drill string 1.
  • the braking device 17, like the braking devices 14 and 15, is infinitely adjustable, so that the braking devices 14, 15, 17 can be used individually or together to fine-tune the respectively desirable torque loading of the drill bit 7 and drill pipe string 1.
  • the above-ground drive 13 drives a drill pipe string 1 in clockwise rotation at a speed of 60 rpm
  • the drive motor 6 of the drilling device 4 would also set the drill bit 7 in clockwise rotation relative to the housing 5 and would become above-ground the drill string 1 with a torque of 40,000 Nm, of which due to the friction of the Drill pipe string 1 in the formation at the transition to the housing 5 of the drilling tool 4 still has 10,000 Nm, so the drive power on the drill bit rotating at 260 rpm compared to the formation in clockwise rotation would be 7 272 kW.
  • the drive motor 6 of the drilling tool 4 drives the drill pipe string 1 at 20 rpm in a counterclockwise rotation, the drill bit 7 with respect to the housing 5 of the drilling tool 4 at 200 rpm in a clockwise rotation, and the drive motor 6 thereby applies a torque of 40,000 Nm to the drill pipe string 1 , of which 10,000 Nm are still available due to the friction of the drill pipe string 1 in the formation at the surface end, the drive power on the drill bit rotating relative to the formation at 180 rpm in clockwise rotation is 7 754 kW.
  • the torque at a lower and upper end of the drill pipe string 1 is 7 586 kW and thus at a speed of 7 586 kW rotating at 140 rpm relative to the formation in a clockwise rotation at least about twice the drive power that can be applied to the drill bit 7 from above during conventional clockwise rotation of the drill pipe string 1.

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)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Earth Drilling (AREA)
EP96109150A 1996-06-07 1996-06-07 Procédé et dispositif pour le forage d'un trou dans des formations souterraines Withdrawn EP0811744A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96109150A EP0811744A1 (fr) 1996-06-07 1996-06-07 Procédé et dispositif pour le forage d'un trou dans des formations souterraines
AU24700/97A AU2470097A (en) 1996-06-07 1997-06-04 New drilling technique assuring higher ROP and extended reach capability in long deviated holes
NO972626A NO972626L (no) 1996-06-07 1997-06-06 Fremgangsmåte og anordning for utforming av et borehull i undergrunnsformasjoner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96109150A EP0811744A1 (fr) 1996-06-07 1996-06-07 Procédé et dispositif pour le forage d'un trou dans des formations souterraines

Publications (1)

Publication Number Publication Date
EP0811744A1 true EP0811744A1 (fr) 1997-12-10

Family

ID=8222861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109150A Withdrawn EP0811744A1 (fr) 1996-06-07 1996-06-07 Procédé et dispositif pour le forage d'un trou dans des formations souterraines

Country Status (3)

Country Link
EP (1) EP0811744A1 (fr)
AU (1) AU2470097A (fr)
NO (1) NO972626L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8151907B2 (en) * 2008-04-18 2012-04-10 Shell Oil Company Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841420A (en) * 1972-03-24 1974-10-15 M Russell Directional drilling means
US4678045A (en) * 1983-07-18 1987-07-07 Lyons William C Turbine tool
US4854397A (en) * 1988-09-15 1989-08-08 Amoco Corporation System for directional drilling and related method of use
EP0343800A2 (fr) * 1988-05-20 1989-11-29 Utilx Corporation Dispositif pour l'exécution d'un tunnel
WO1990005235A1 (fr) * 1988-11-03 1990-05-17 James Bain Noble Appareil et procede de forage directionnel
EP0520733A1 (fr) * 1991-06-25 1992-12-30 Camco Drilling Group Limited Système de forage à rotation pour déviation réglable
EP0571045A1 (fr) * 1992-05-22 1993-11-24 Anadrill International SA Forage dirigé avec un moteur de fond de puits sur tubage enroulé

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841420A (en) * 1972-03-24 1974-10-15 M Russell Directional drilling means
US4678045A (en) * 1983-07-18 1987-07-07 Lyons William C Turbine tool
EP0343800A2 (fr) * 1988-05-20 1989-11-29 Utilx Corporation Dispositif pour l'exécution d'un tunnel
US4854397A (en) * 1988-09-15 1989-08-08 Amoco Corporation System for directional drilling and related method of use
WO1990005235A1 (fr) * 1988-11-03 1990-05-17 James Bain Noble Appareil et procede de forage directionnel
EP0520733A1 (fr) * 1991-06-25 1992-12-30 Camco Drilling Group Limited Système de forage à rotation pour déviation réglable
EP0571045A1 (fr) * 1992-05-22 1993-11-24 Anadrill International SA Forage dirigé avec un moteur de fond de puits sur tubage enroulé

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8151907B2 (en) * 2008-04-18 2012-04-10 Shell Oil Company Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations

Also Published As

Publication number Publication date
NO972626L (no) 1997-12-08
AU2470097A (en) 1997-12-11
NO972626D0 (no) 1997-06-06

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