Method for a drill support arrangement, drill support arrangement, vehicle comprising a drill support arrangement and computer program product

1. A method pertaining to a drill support device ( 290 ) comprising two relatively movable drill support arms ( 241 ; 242 ), wherein a support space is formed between opposite arm sections ( 261 , 262 ), in which a drill steel ( 201 ) is adapted to be guided and wherein said space is opened and closed by relative displacement of said sections ( 261 , 262 );

wherein said method comprises the step of:

fixing (S 401 ) at least one of said drill support arms ( 241 ; 242 ) partly by sealingly clamping said drill support arm ( 241 ; 242 ) between on the one side a support element ( 670 ) and on the other side a house section ( 650 ), which accommodates a hydraulic cylinder ( 605 ) with a hydraulic piston ( 680 ), on which hydraulic cylinder ( 605 ) said drill support arm ( 241 ; 242 ) is revolvingly mounted, and partly by displacing the housing section ( 650 ) relative to said drill support arm ( 241 ; 242 ) and clamping said drill support arm ( 241 ; 242 ) between the housing section ( 650 ) and the support element ( 670 ) by means of a screw means ( 640 ) connected to the housing section ( 650 ) and the hydraulic piston ( 680 ).

2. The method according to claim 1 , wherein said screw means ( 640 ) enters in said hydraulic cylinder ( 605 ) and is screwed in the piston ( 680 ) of the hydraulic cylinder for prestressing of a spring arrangement ( 660 ) acting in the hydraulic cylinder ( 605 ) between the piston ( 680 ) of the cylinder and a section of the hydraulic cylinder ( 605 ) facing said piston ( 680 ) to prestressedly clamp said drill support arm ( 241 ; 242 ).

3. The method according claim 2 , wherein said clamping of the drill support arm ( 241 ; 242 ) is reduced by means of a hydraulic pressure against said cylinder piston ( 680 ), to at least partly overcome said prestress.

4. The method according to claim 2 wherein the steps of said method are performed by a computer program (P) for a drill support device ( 290 ) comprising two relatively movable drill support arms ( 241 ; 242 ), wherein a support space is formed between opposite arm sections ( 261 , 262 ), in which a drill steel ( 201 ) is adapted to be guided and wherein said space is opened and closed by relative displacement of said sections ( 261 , 262 ), wherein said computer program (P) comprises program code stored on a, or by a, computer readable, medium for causing an electronic control unit ( 200 ; 500 ) or another computer ( 210 ; 500 ) connected to the electronic control unit ( 200 ; 500 ).

5. The method according to claim 2 wherein the steps of said method are performed by a A computer program product comprising a program code stored on a, or by a, computer readable, medium, when said computer program is run on an electronic control unit ( 200 ; 500 ) or another computer ( 210 ; 500 ) connected to the electronic control unit ( 200 ; 500 ).

6. The method according claim 1 , wherein said clamping of the drill support arm ( 241 ; 242 ) is reduced by means of a hydraulic pressure against said cylinder piston ( 680 ), to at least partly overcome said prestress.

7. The method according to claim 1 , wherein said hydraulic pressure is controlled to achieve revolvability of said drill support arm ( 241 ; 242 ) while maintaining a sealing contact of the drill support arm with the support element ( 670 ) and the housing section ( 650 ) respectively.

8. The method according to claim 1 , comprising the step of:

opening (s 430 ) and closing (s 440 ) said space by relative displacement of said sections ( 261 , 262 ), wherein the one drill support arms is fixed and the other drill support arm is revolving around the hydraulic cylinder ( 605 ).

9. The method according to claim 1 , comprising the step of:

affecting actuator means ( 251 ; 252 ) to revolve said at least one drill support arm ( 241 ; 242 ) around the hydraulic cylinder ( 605 ).

10. The method according to claim 1 wherein the steps of said method are performed by a computer program (P) for a drill support device ( 290 ) comprising two relatively movable drill support arms ( 241 ; 242 ), wherein a support space is formed between opposite arm sections ( 261 , 262 ), in which a drill steel ( 201 ) is adapted to be guided and wherein said space is opened and closed by relative displacement of said sections ( 261 , 262 ), wherein said computer program (P) comprises program code stored on a, or by a, computer readable, medium for causing an electronic control unit ( 200 ; 500 ) or another computer ( 210 ; 500 ) connected to the electronic control unit ( 200 ; 500 ).

11. The method according to claim 1 wherein the steps of said method are performed by a computer program product comprising a program code stored on a, or by a, computer readable, medium, when said computer program is run on an electronic control unit ( 200 ; 500 ) or another computer ( 210 ; 500 ) connected to the electronic control unit ( 200 ; 500 ).

12. A drill support device ( 290 ) comprising two relatively movable drill support arms ( 241 ; 242 ), wherein a support space is formed between opposite arm sections ( 261 , 262 ), in which a drill steel ( 201 ) is adapted to be guided and wherein said space is opened and closed by relative displacement of said sections ( 261 , 262 );

wherein:

means ( 640 , 650 , 670 , 680 ) for fixing at least one of said drill support arms ( 241 ; 242 ) by sealingly clamping said drill support arm ( 241 ; 242 ) between, on the one side a support element ( 670 ) and on the other side a house section ( 650 ), which accommodates a hydraulic cylinder ( 605 ) with a hydraulic piston ( 680 ), on which hydraulic cylinder ( 605 ) said drill support arm ( 241 ; 242 ) is revolvingly mounted, wherein said means ( 640 , 650 , 670 ) for fixing at least one of said drill support arms ( 241 ; 242 ) comprises a screw means ( 640 ) connected to the housing section ( 650 ) and the hydraulic piston ( 680 ), wherein said housing section ( 650 ) is displaceably arranged relative to said drill support arm ( 241 ; 242 ) and arranged to clamp said drill support arm ( 241 ; 242 ) between the housing section ( 650 ) and the support element ( 670 ) by means of the screw means ( 640 ).

13. The drill support device according to claim 12 , wherein said screw means ( 640 ) is arranged to enter in said hydraulic cylinder ( 605 ) and is screwed in the piston ( 680 ) of the hydraulic cylinder for prestressing of a spring arrangement ( 660 ) acting in the hydraulic cylinder ( 605 ) between the piston ( 680 ) of the cylinder and a section of the hydraulic cylinder ( 605 ) facing said piston to prestressedly clamp said drill support arm ( 241 ; 242 ).

14. The drill support device according to claim 13 , comprising:

means ( 690 ) for reducing said clamping of the drill support arm ( 241 ; 242 ) by means of a hydraulic pressure against said cylinder piston ( 680 ) to at least partly overcome said prestress.

15. The drill support device according to claim 12 , comprising:

means ( 690 ) for reducing said clamping of the drill support arm ( 241 ; 242 ) by means of a hydraulic pressure against said cylinder piston ( 680 ) to at least partly overcome said prestress.

16. The drill support device according to claim 12 , comprising:

means ( 200 ; 210 ; 500 ) for controlling said hydraulic pressure to achieve revolvability of said drill support arm ( 241 ; 242 ) while maintaining a sealing contact of the drill support arm with the support element ( 670 ) and the housing section ( 650 ) respectively.

17. The drill support device according to claim 12 , comprising:

means ( 200 ; 210 ; 500 ; 251 ; 252 ) for opening and closing said space by relative displacement of said sections ( 261 ; 262 ), wherein one drill support arm is fixedly arranged and the other drill support arm is revolvingly arranged around the hydraulic cylinder ( 605 ).

18. The drill support device according to any claim 17 , comprising:

actuator means ( 251 ; 252 ) for revolving the at least one drill support arm ( 241 ; 242 ) around the hydraulic cylinder ( 605 ).

19. A vehicle ( 100 ) comprising a drill support device ( 290 ) according to claim 12 .

20. The vehicle according to claim 19 , wherein said vehicle is a drilling rig.