WO2009148323A1 - Rock drilling machine - Google Patents

Rock drilling machine Download PDF

Info

Publication number
WO2009148323A1
WO2009148323A1 PCT/NO2009/000201 NO2009000201W WO2009148323A1 WO 2009148323 A1 WO2009148323 A1 WO 2009148323A1 NO 2009000201 W NO2009000201 W NO 2009000201W WO 2009148323 A1 WO2009148323 A1 WO 2009148323A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling
steering
string
joint
drilling machine
Prior art date
Application number
PCT/NO2009/000201
Other languages
French (fr)
Inventor
Per Olav Haughom
Sigurd Kjell Haughom
Original Assignee
Norwegian Hard Rock Drilling As
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 Norwegian Hard Rock Drilling As filed Critical Norwegian Hard Rock Drilling As
Priority to ES09758570.7T priority Critical patent/ES2645344T3/en
Priority to EP09758570.7A priority patent/EP2350421B1/en
Publication of WO2009148323A1 publication Critical patent/WO2009148323A1/en

Links

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
    • E21B7/067—Deflecting the direction of boreholes with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D3/00—Raising shafts, i.e. working upwards from the bottom

Definitions

  • This invention relates to a rock drilling machine. More particularly it concerns a rock drilling machine comprising a drilling portion and a string portion.
  • bent sub a portion having a fixed guide angle
  • the drill string needs to rotate about its longitudinal axis the whole time to maintain a desired drilling direction.
  • the use of a bent sub causes the borehole to obtain a certain helix shape.
  • the object of the invention is to remedy or reduce at least one of the prior art drawbacks .
  • a rock drilling machine comprising a drilling portion and a string portion, and which is characterised in that the rock drilling machine is provided with a steering joint, being adjustable regarding direction and angle, between the drilling portion and the string portion.
  • the longitudinal axis of the drilling portion may thereby take up a desired angle and direction relative to the string portion longitudinal axis, whereby the drilling direction, based on measured values, may be corrected.
  • the steering joint may be arranged to be able to take up torque, as the steering joint may comprise such as a universal joint or an arced tooth coupling with axial stiffening.
  • the torque from the drilling portion may thus be transmitted to the string portion.
  • the steering joint steering angle may be adjusted by means of a steering arm extending through the steering joint from the one of the drilling portion and the string portion and into the other of the drilling portion or the string portion.
  • the angle between the drilling portion and the string portion may be changed by displacing the free end portion of the steering arm radially.
  • the displacement may be carried out in that the free end portion cooperates with radial cylinders in that of the drilling portion and the string portion that the steering arm extends into.
  • the steering joint is thus formed to be able to transmit torsion ' forces as well as axial forces between the drilling portion and the string portion at the same time as the axial angle between the two portions may be set at the desired value and direction.
  • Fig. 1 shows a portion of a rock drilling machine in a borehole
  • Fig. 2 shows in greater detail a longitudinal section through the steering joint of the rock drilling machine ;
  • Fig . 3 shows a section II - II in f ig . 2 .
  • the reference numeral 1 indicates a portion of a rock drilling machine in a borehole 2 where the rock drilling machine 1 comprises a drilling portion 4 and a string portion 6, and where the drilling portion 4 and the string portion 6 are interconnected by means of a steering joint 8.
  • the drilling portion 4 comprises a drill bit 10, a gear 12 and a drive motor 14 for the drill bit 10.
  • the string portion 6 comprises a hydraulic section 16 and an electric section 18 and also interconnected pipe lengths 20 which together make up a pipe string 22.
  • the pipe string 22 extends out of the borehole 2 to a not shown feeding arrangement .
  • the steering joint 8 comprises a universal joint 24 wherein two of the four arms of a universal spider are pivotably connected to the drilling portion 4 by means of a first bearing couple 28 and to the string portion by means of a second bearing couple 30, see fig. 3.
  • the drilling portion 4 and the string portion 6 are thus articulated interconnected, but such that both axial forces and torsion forces may be transmitted between the portions 4 and 6.
  • a free end portion 36 of the steering arm 32 which is fixed to the drilling portion 4, extends concentrically with the drilling portion 4 through an opening 34 in the universal spider 26 and further into the string portion 6.
  • the steering arm 32 is provided with a bore 38 there through for conveying for example fluids or running of not shown signal and power cables .
  • Each cylinder 42 is single acting, as the respective cylinder's 42 piston rod 44 are preloaded toward the free end portion 36 by springs 46.
  • the free end portion 36 may be displaced radially in the desired direction, whereby the drilling portion 4 central axis 48 is pivoted to the desired angle a, see fig. 1, and direction relative to the string portion 6 central axis 40.
  • a position transmitter 50 in each of the cylinders 42 reads the relative position of the piston rod 44 in the cylinder 42 at anyone time.
  • a sheath 52 surrounds the universal joint 24 sealingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)

Abstract

A rock drilling machine (1) comprising a drilling portion (4) and a string portion (6), and where the rock drilling machine (1) between the drilling portion (4) and the string portion (6) is provided with a steering joint (8).

Description

ROCK DRILLING MACHINE
This invention relates to a rock drilling machine. More particularly it concerns a rock drilling machine comprising a drilling portion and a string portion.
During drilling in rock, when a drilling portion is connected to a drill string running through a bore hole and to a driving arrangement on the outside, it is necessary to be able to steer the drilling portion in a desired direction.
From petroleum production it is known to provide a drilling device with a guide shoe gripping the borehole wall, and which is arranged to be able to steer a drilling tool in a desired direction.
It is also known to provide the drilling device with a portion having a fixed guide angle, a so-called "bent sub", where the drill string needs to rotate about its longitudinal axis the whole time to maintain a desired drilling direction. The use of a bent sub causes the borehole to obtain a certain helix shape.
For rock drilling, where the drill string is fed ascending into the borehole, it is impractical to have to rotate a relatively heavy drill string to be able to change drilling direction. The object of the invention is to remedy or reduce at least one of the prior art drawbacks .
The object is achieved according to the invention by the features stated in the description below and in the following claims.
There is provided a rock drilling machine comprising a drilling portion and a string portion, and which is characterised in that the rock drilling machine is provided with a steering joint, being adjustable regarding direction and angle, between the drilling portion and the string portion.
The longitudinal axis of the drilling portion may thereby take up a desired angle and direction relative to the string portion longitudinal axis, whereby the drilling direction, based on measured values, may be corrected.
The steering joint may be arranged to be able to take up torque, as the steering joint may comprise such as a universal joint or an arced tooth coupling with axial stiffening. The torque from the drilling portion may thus be transmitted to the string portion.
The steering joint steering angle may be adjusted by means of a steering arm extending through the steering joint from the one of the drilling portion and the string portion and into the other of the drilling portion or the string portion.
The angle between the drilling portion and the string portion may be changed by displacing the free end portion of the steering arm radially. The displacement may be carried out in that the free end portion cooperates with radial cylinders in that of the drilling portion and the string portion that the steering arm extends into. The steering joint is thus formed to be able to transmit torsion' forces as well as axial forces between the drilling portion and the string portion at the same time as the axial angle between the two portions may be set at the desired value and direction.
For rock drilling machines of this type being displaced from the outside of the borehole and wherein the string portion is difficult to rotate about its longitudinal axis during the drilling operation, the provided steering joint together with per se known steering technique, makes possible a considerable improvement in relation to prior art.
In the following is described an example of a preferred embodiment which is illustrated in the accompanying drawings, wherein:
Fig. 1 shows a portion of a rock drilling machine in a borehole;
Fig. 2 shows in greater detail a longitudinal section through the steering joint of the rock drilling machine ; and
Fig . 3 shows a section II - II in f ig . 2 .
In the drawings the reference numeral 1 indicates a portion of a rock drilling machine in a borehole 2 where the rock drilling machine 1 comprises a drilling portion 4 and a string portion 6, and where the drilling portion 4 and the string portion 6 are interconnected by means of a steering joint 8.
The drilling portion 4 comprises a drill bit 10, a gear 12 and a drive motor 14 for the drill bit 10. The string portion 6 comprises a hydraulic section 16 and an electric section 18 and also interconnected pipe lengths 20 which together make up a pipe string 22. The pipe string 22 extends out of the borehole 2 to a not shown feeding arrangement .
The steering joint 8 comprises a universal joint 24 wherein two of the four arms of a universal spider are pivotably connected to the drilling portion 4 by means of a first bearing couple 28 and to the string portion by means of a second bearing couple 30, see fig. 3. The drilling portion 4 and the string portion 6 are thus articulated interconnected, but such that both axial forces and torsion forces may be transmitted between the portions 4 and 6.
A free end portion 36 of the steering arm 32, which is fixed to the drilling portion 4, extends concentrically with the drilling portion 4 through an opening 34 in the universal spider 26 and further into the string portion 6. The steering arm 32 is provided with a bore 38 there through for conveying for example fluids or running of not shown signal and power cables .
Evenly distributed about the string portion's 6 central axis 40 is arranged four cylinders 42 extending radially in towards the steering arm's 32 free end portion 36.
Each cylinder 42 is single acting, as the respective cylinder's 42 piston rod 44 are preloaded toward the free end portion 36 by springs 46.
By adjusting the hydraulic pressure in each of the cylinders 42, the free end portion 36 may be displaced radially in the desired direction, whereby the drilling portion 4 central axis 48 is pivoted to the desired angle a, see fig. 1, and direction relative to the string portion 6 central axis 40. A position transmitter 50 in each of the cylinders 42 reads the relative position of the piston rod 44 in the cylinder 42 at anyone time.
Necessary per se known measuring equipment such as to measure the position of the drill bit, and also control console and cables are not shown, but the drive motor 14 and the cylinders 42 are controlled via the hydraulic section 16 and the electric section 18.
A sheath 52 surrounds the universal joint 24 sealingly.
When the drilling position and direction is known, it is relatively simple to correct the drilling direction by displacing the piston rods 44 such that the desired angle a and direction is taken up between the two central axes 40, 48.

Claims

P a t e n t c l a i m s
1. A rock drilling machine (1) comprising a drilling portion (4) and a string portion (6) , c h a r a c t e r i s e d i n that the rock drilling machine (1)
5 between the drilling portion (4) and the string portion (6) is provided with a steering joint (8) which is adjustable in direction and angle.
2. A device according to claim 1, c h a r a c t e r i s e d i n that the steering joint (8) is arranged io to be able to take up a torque .
3. A device according to claim 1, c h a r a c t e r i s e d i n that the steering joint (8) comprises a universal joint (24) .
4. A device according to claim 1, c h a r a c t e r - i5 i s e d i n that the steering joint (8) comprises an arched tooth coupling.
5. A device according to claim 1, c h a r a c t e r i s e d i n that the steering angle of the steering joint (8) is adjustable by means of a steering arm
20 (32) extending through the steering joint (8) from the one of the drilling portion (4) and the string portion (6) .
6. A device according to claim 5, c h a r a c t e r i s e d i n that the free end portion (36) of the
25 steering arm (32) is displaced radially at change of the steering angle (a) .
7. A device according to claim 1, c h a r a c t e r i s e d i n that the free end portion (36) cooperates with radial cylinders (42) in one of the drilling portion (4) and the string portion (6) that the steering arm (36) extends into.
PCT/NO2009/000201 2008-06-05 2009-05-29 Rock drilling machine WO2009148323A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES09758570.7T ES2645344T3 (en) 2008-06-05 2009-05-29 Rock drilling machine
EP09758570.7A EP2350421B1 (en) 2008-06-05 2009-05-29 Rock drilling machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20082644 2008-06-05
NO20082644A NO333816B1 (en) 2008-06-05 2008-06-05 Device by rock drill.

Publications (1)

Publication Number Publication Date
WO2009148323A1 true WO2009148323A1 (en) 2009-12-10

Family

ID=41398283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2009/000201 WO2009148323A1 (en) 2008-06-05 2009-05-29 Rock drilling machine

Country Status (4)

Country Link
EP (1) EP2350421B1 (en)
ES (1) ES2645344T3 (en)
NO (1) NO333816B1 (en)
WO (1) WO2009148323A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO336497B1 (en) * 2013-05-10 2015-09-07 Norhard As Device at guide joint for rock drill

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO346960B1 (en) * 2015-03-24 2023-03-20 Forte Energi Bergboring As SYSTEM AND METHOD FOR DIRECTIONAL DRILLING AND SIMULTANEOUS LINING OF A BOREHOLE

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194267A (en) 1939-10-30 1940-03-19 Fullgage Deflecting Tool Compa Drilling tool
US3888319A (en) * 1973-11-26 1975-06-10 Continental Oil Co Control system for a drilling apparatus
EP0677640B1 (en) * 1991-06-25 1999-09-08 Camco Drilling Group Limited Improvements in or relating to steerable rotary drilling systems
US6082470A (en) 1997-06-10 2000-07-04 Charles T. Webb Directional drilling system and apparatus
GB2373272A (en) 2001-03-15 2002-09-18 Xl Technology Ltd A variable orientation downhole tool
WO2007134748A1 (en) 2006-05-19 2007-11-29 Services Petroliers Schlumberger Directional control drilling system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043381A (en) * 1960-05-05 1962-07-10 Jr Branch M Mcneely Means for controlling directional deviations in a well bore
US6142245A (en) * 1997-08-19 2000-11-07 Shell Oil Company Extended reach drilling system
US6109372A (en) * 1999-03-15 2000-08-29 Schlumberger Technology Corporation Rotary steerable well drilling system utilizing hydraulic servo-loop
RU2274725C2 (en) * 2001-01-10 2006-04-20 Шелл Интернэшнл Рисерч Маатсхаппий Б.В. Device for drilling string securing in well
NO326032B1 (en) * 2006-07-24 2008-09-01 Sira Kvina Kraftselskap Method and device for directional control of rock drilling machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194267A (en) 1939-10-30 1940-03-19 Fullgage Deflecting Tool Compa Drilling tool
US3888319A (en) * 1973-11-26 1975-06-10 Continental Oil Co Control system for a drilling apparatus
EP0677640B1 (en) * 1991-06-25 1999-09-08 Camco Drilling Group Limited Improvements in or relating to steerable rotary drilling systems
US6082470A (en) 1997-06-10 2000-07-04 Charles T. Webb Directional drilling system and apparatus
GB2373272A (en) 2001-03-15 2002-09-18 Xl Technology Ltd A variable orientation downhole tool
GB2373272B (en) * 2001-03-15 2003-07-23 Xl Technology Ltd Tool for variable directional actuation
WO2007134748A1 (en) 2006-05-19 2007-11-29 Services Petroliers Schlumberger Directional control drilling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO336497B1 (en) * 2013-05-10 2015-09-07 Norhard As Device at guide joint for rock drill

Also Published As

Publication number Publication date
EP2350421A4 (en) 2015-11-18
EP2350421A1 (en) 2011-08-03
NO20082644L (en) 2009-12-07
EP2350421B1 (en) 2017-08-02
ES2645344T3 (en) 2017-12-05
NO333816B1 (en) 2013-09-23

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