(19)

(11)

EP 1 856 370 A1

(12)

(43) Date of publication: 21.11.2007 Bulletin 2007/47 (21) Application number: 06716758.5 (22) Date of filing: 06.03.2006

(51) International Patent Classification (IPC):  E21B 19/14(2006.01) E21B 19/20(2006.01) (86) International application number: PCT/NO2006/000082 (87) International publication number: WO 2006/096068 (14.09.2006 Gazette 2006/37)

(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: 07.03.2005 NO 20051199 (71) Applicant: Sense Edm As 4623 Kristiansand (NO)	(72) Inventors: ZACHARIASEN, Erik N-4639 Kristiansand (NO) ENGENES, Finn N-4640 Søgne (NO) (74) Representative: Struck, Norbert et al Gille Hrabal Struck Neidlein Prop Roos Brucknerstrasse 20 40593 Düsseldorf 40593 Düsseldorf (DE)