AN ARRANGEMENT AND A METHOD FOR MONITORING AN AIR FLOW IN A DRILL RIG - Patent 2310620

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EP 2 310 620 A2

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(88)	Date of publication A3:
	18.03.2010

(43)	Date of publication:
	20.04.2011 Bulletin 2011/16

(21)	Application number: 09746914.2

(22)	Date of filing: 29.04.2009

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International Patent Classification (IPC):

E21B 21/08^(2006.01)

(86)	International application number:
	PCT/US2009/002668

(87)	International publication number:
	WO 2009/139825 (19.11.2009 Gazette 2009/47)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA RS

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Priority:

13.05.2008 WO PCT/US2008/006075

(71)	Applicants:
	Atlas Copco Rock Drills AB 701 91 Örebro (SE) Atlas Copco Drilling Solutions Inc. Garland, Texas 75040 (US)

(72)	Inventors:
	KRAINER, Per 771 42 Ludvika (SE) JIAO, Deyi Plano, TX 75024 (US)

(74)	Representative: Jansson, Margareta Karin
	Atlas Copco Rock Drills AB, Patents 701 91 Örebro 701 91 Örebro (SE)

(54)	AN ARRANGEMENT AND A METHOD FOR MONITORING AN AIR FLOW IN A DRILL RIG