(19)

(11)

EP 2 673 459 A1

(12)

(43) Date of publication: 18.12.2013 Bulletin 2013/51 (21) Application number: 12745089.8 (22) Date of filing: 03.02.2012

(51) International Patent Classification (IPC):  E21B 43/00(2006.01) (86) International application number: PCT/US2012/023719 (87) International publication number: WO 2012/109098 (16.08.2012 Gazette 2012/33)

(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: 10.02.2011 US 201161441348 P (71) Applicant: Generon IGS, Inc. Houston TX 77086 (US)	(72) Inventors: CHENOWETH, Daniel Farmington, NM 87401 (US) FONT, John Cypress, TX 77433 (US) (74) Representative: Poncet, Jean-François  Cabinet Poncet 7, chemin de Tillier B.P. 317 74008 Annecy Cedex 74008 Annecy Cedex (FR)