(19)

(11)

EP 2 313 608 A2

(12)

(88) Date of publication A3: 08.04.2010 (43) Date of publication: 27.04.2011 Bulletin 2011/17 (21) Application number: 09774292.8 (22) Date of filing: 30.06.2009

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) E21B 43/38(2006.01) F04B 15/00(2006.01) (86) International application number: PCT/US2009/049176 (87) International publication number: WO 2010/002841 (07.01.2010 Gazette 2010/01)

(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 RS (30) Priority: 30.06.2008 US 133373 (71) Applicant: Simmons, Eugene Darrell Roswell, NM 88201 (US)	(72) Inventor: Simmons, Eugene Darrell Roswell, NM 88201 (US) (74) Representative: Kupecz, Arpad  Octrooibureau Los en Stigter B.V. Weteringschans 96 1017 XS Amsterdam 1017 XS Amsterdam (NL)