(19)

(11)

EP 2 914 807 A2

(12)

(88) Date of publication A3: 27.11.2014 (43) Date of publication: 09.09.2015 Bulletin 2015/37 (21) Application number: 13798367.2 (22) Date of filing: 24.10.2013

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) E21B 36/00(2006.01) E21B 43/30(2006.01) (86) International application number: PCT/GB2013/052773 (87) International publication number: WO 2014/068286 (08.05.2014 Gazette 2014/19)

(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 Designated Extension States: BA ME (30) Priority: 31.10.2012 GB 201219547 (71) Applicant: Hivis Pumps AS 4033 Stavanger (NO)	(72) Inventor: SIMPSON, Alastair Aberdeen Aberdeenshire AB25 2DD (GB) (74) Representative: Fulton, David James et al Lincoln IP 9 Victoria Street Aberdeen AB10 1XB Aberdeen AB10 1XB (GB)