METHOD AND SYSTEM FOR DRILLING WITH REDUCED SURFACE PRESSURE - Patent 2751374

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EP 2 751 374 A2

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(88)	Date of publication A3:
	03.10.2013

(43)	Date of publication:
	09.07.2014 Bulletin 2014/28

(21)	Application number: 12750589.9

(22)	Date of filing: 22.08.2012

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International Patent Classification (IPC):

E21B 17/20^(2006.01)

(86)	International application number:
	PCT/EP2012/066293

(87)	International publication number:
	WO 2013/030050 (07.03.2013 Gazette 2013/10)

(84)	Designated Contracting States:
	AL 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 RS SE SI SK SM TR

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Priority:

31.08.2011 NO 20111179

(71)	Applicant: Reelwell As
	N-4068 Stavanger (NO)

(72)	Inventor:
	VESTAVIK, Ola, M. N-6092 Eggesbønes (NO)

(74)	Representative: O'Neill, Michelle
	Harrison IP 1st Floor, Box Tree House Northminster Business Park Northfield Lane York, YO26 6QU York, YO26 6QU (GB)

(54)	METHOD AND SYSTEM FOR DRILLING WITH REDUCED SURFACE PRESSURE