(19)

(11)

EP 3 397 834 A1

(12)

(43) Date of publication: 07.11.2018 Bulletin 2018/45 (21) Application number: 16823412.8 (22) Date of filing: 15.12.2016

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) F04C 2/08(2006.01) F04D 13/08(2006.01) F04B 47/00(2006.01) F04D 9/04(2006.01) (86) International application number: PCT/US2016/066843 (87) International publication number: WO 2017/116732 (06.07.2017 Gazette 2017/27)

(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 Designated Validation States: MA MD (30) Priority: 28.12.2015 US 201514980535 (71) Applicant: Saudi Arabian Oil Company Dhahran 31311 (SA)	(72) Inventors: XIAO, Jinjiang Dhahran 31311 (SA) EJIM, Chidirim, Enoch Dhahran 31311 (SA) (74) Representative: Dauncey, Mark Peter  Marks & Clerk LLP 1 New York Street Manchester M1 4HD Manchester M1 4HD (GB)