HIGH FREQUENCY FLUID DRIVEN DRILL HAMMER PERCUSSION DRILLING IN HARD FORMATIONS - Patent 2744966

(19)

(11)

EP 2 744 966 A1

(12)

(43)	Date of publication:
	25.06.2014 Bulletin 2014/26

(21)	Application number: 12825336.6

(22)	Date of filing: 17.08.2012

(51)

International Patent Classification (IPC):

E21B 4/14^(2006.01)

B25D 9/18^(2006.01)

(86)	International application number:
	PCT/NO2012/050148

(87)	International publication number:
	WO 2013/028078 (28.02.2013 Gazette 2013/09)

(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

(30)

Priority:

19.08.2011 NO 20111140

(71)	Applicant: Hammergy AS
	4013 Stavanger (NO)

(72)	Inventor:
	VATNE, Per A. NO-4638 Kristiansand (NO)

(74)	Representative: Protector IP Consultants AS
	Oscarsgate 20 0352 Oslo 0352 Oslo (NO)

(54)	HIGH FREQUENCY FLUID DRIVEN DRILL HAMMER PERCUSSION DRILLING IN HARD FORMATIONS