(19)

(11)

EP 1 871 984 A2

(12)

(88) Date of publication A3: 09.11.2006 (43) Date of publication: 02.01.2008 Bulletin 2008/01 (21) Application number: 06719067.8 (22) Date of filing: 19.01.2006

(51) International Patent Classification (IPC):  E21B 43/24(2006.01) E21B 36/04(2006.01) (86) International application number: PCT/US2006/002098 (87) International publication number: WO 2006/078946 (27.07.2006 Gazette 2006/30)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 19.01.2005 US 645154 P (71) Applicant: KSN Energies, LLC Great Barrington, MA 01230 (US)	(72) Inventor: KASEVICH, Raymond, S. Great Barrington, MA 01230 (US) (74) Representative: Bohnenberger, Johannes  Meissner, Bolte & Partner GbR, Postfach 86 06 24 81633 München 81633 München (DE)