A CONTIGENCY RELEASE DEVICE THAT USES RIGHT-HAND TORQUE TO ALLOW MOVEMENT OF A COLLET PROP - Patent 2748411

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EP 2 748 411 A1

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(43)	Date of publication:
	02.07.2014 Bulletin 2014/27

(21)	Application number: 11875241.9

(22)	Date of filing: 01.11.2011

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International Patent Classification (IPC):

E21B 23/00^(2006.01)
E21B 33/03^(2006.01)

E21B 23/01^(2006.01)
E21B 17/10^(2006.01)

(86)	International application number:
	PCT/US2011/058694

(87)	International publication number:
	WO 2013/066311 (10.05.2013 Gazette 2013/19)

(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

(71)	Applicant: Halliburton Energy Services, Inc.
	Houston, TX 77072 (US)

(72)	Inventors:
	STAUTZENBERGER, Arthur, T. Carrollton, TX 75006 (US) WATSON, Brock Sadler, TX 76264 (US)

(74)	Representative: HOFFMANN EITLE
	Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)

(54)	A CONTIGENCY RELEASE DEVICE THAT USES RIGHT-HAND TORQUE TO ALLOW MOVEMENT OF A COLLET PROP