(19)

(11)

EP 2 585 677 A2

(12)

(88) Date of publication A3: 14.03.2013 (43) Date of publication: 01.05.2013 Bulletin 2013/18 (21) Application number: 11726823.5 (22) Date of filing: 22.06.2011

(51) International Patent Classification (IPC):  E21B 43/01(2006.01) (86) International application number: PCT/EP2011/060478 (87) International publication number: WO 2011/161179 (29.12.2011 Gazette 2011/52)

(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: 23.06.2010 US 357691 P (71) Applicants: Gateff, Jean-Paul 83400 Hyéres (FR) Mougin, Georges 46140 Belaye (FR)	(72) Inventors: Gateff, Jean-Paul 83400 Hyéres (FR) Mougin, Georges 46140 Belaye (FR) (74) Representative: Sayettat, Julien Christian  STRATO-IP 18, rue Soleillet 75020 Paris 75020 Paris (FR)