(19)

(11)

EP 2 449 210 A1

(12)

(43) Date of publication: 09.05.2012 Bulletin 2012/19 (21) Application number: 09785989.6 (22) Date of filing: 30.06.2009

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) E21B 27/00(2006.01) (86) International application number: PCT/IB2009/006172 (87) International publication number: WO 2011/001198 (06.01.2011 Gazette 2011/01)

(84) Designated Contracting States: 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 SE SI SK TR Designated Extension States: AL BA (71) Applicant: Optimoil Technologies Sa 1249 Luxembourg (LU)	(72) Inventor: ARLANDIS, Jean-Charles Provincia de Buenos Aires (AR) (74) Representative: Le Cacheux, Samuel L.R.  Capistel 10 montée des Lilas 69300 Caluire 69300 Caluire (FR)