DEVICE FOR DETECTING THE PRESENCE OF ONE OR MORE CAVITIES IN A BOREHOLE - Patent 2961928

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EP 2 961 928 A1

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(43)	Date of publication:
	06.01.2016 Bulletin 2016/01

(21)	Application number: 14757785.2

(22)	Date of filing: 28.02.2014

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International Patent Classification (IPC):

E21D 20/02^(2006.01)

E21B 47/00^(2012.01)

(86)	International application number:
	PCT/SE2014/050249

(87)	International publication number:
	WO 2014/133449 (04.09.2014 Gazette 2014/36)

(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
	Designated Extension States:
	BA ME

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Priority:

28.02.2013 SE 1350239

(71)	Applicant: Malmfälten I Norr AB
	972 38 Luleå (SE)

(72)	Inventors:
	GUSTAFSSON, Leif S-977 53 Luleå (SE) ÅBERG, Sture S-972 41 Luleå (SE)

(74)	Representative: Zacco Sweden AB
	P.O. Box 5581 114 85 Stockholm 114 85 Stockholm (SE)

(54)	DEVICE FOR DETECTING THE PRESENCE OF ONE OR MORE CAVITIES IN A BOREHOLE