(19)

(11)

EP 2 984 276 A1

(12)

(43) Date of publication: 17.02.2016 Bulletin 2016/07 (21) Application number: 14783502.9 (22) Date of filing: 11.04.2014

(51) International Patent Classification (IPC):  E21B 19/22(2006.01) (86) International application number: PCT/US2014/033746 (87) International publication number: WO 2014/169178 (16.10.2014 Gazette 2014/42)

(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 (30) Priority: 12.04.2013 US 201361811219 P 10.04.2014 US 201414250156 (71) Applicant: Axon EP, Inc. Houston, TX 77095 (US)	(72) Inventor: PENDLETON, Gary Spring, TX 77380 (US) (74) Representative: Potter Clarkson LLP  The Belgrave Centre Talbot Street Nottingham NG1 5GG Nottingham NG1 5GG (GB)