METHOD AND DEVICE FOR CONTROLLING THE DRILLING DIRECTION OF A ROCK DRILLING RIG - Patent 1989393

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EP 1 989 393 A1

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(43)	Date of publication:
	12.11.2008 Bulletin 2008/46

(21)	Application number: 07709381.3

(22)	Date of filing: 26.02.2007

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International Patent Classification (IPC):

E21B 15/04^(2006.01)

E21B 7/02^(2006.01)

(86)	International application number:
	PCT/SE2007/000171

(87)	International publication number:
	WO 2007/100284 (07.09.2007 Gazette 2007/36)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

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Priority:

28.02.2006 SE 0600437

(71)	Applicant: Atlas Copco Rock Drills AB
	701 14 Örebro (SE)

(72)	Inventor:
	LARSSON, Johan S-702 31 Örebro (SE)

(74)	Representative: Janson, Ronny
	Ehrner & Delmar Patentbyrå AB Box 10316 100 55 Stockholm 100 55 Stockholm (SE)

(54)	METHOD AND DEVICE FOR CONTROLLING THE DRILLING DIRECTION OF A ROCK DRILLING RIG