(19)

(11)

EP 3 894 508 A1

(12)

(43) Date of publication: 20.10.2021 Bulletin 2021/42 (21) Application number: 19895786.2 (22) Date of filing: 10.12.2019

(51) International Patent Classification (IPC):  C09K 8/03(2006.01) C09K 8/36(2006.01) E21B 47/13(2012.01) G01V 3/00(2006.01) C09K 8/32(2006.01) E21B 47/12(2012.01) E21B 47/18(2012.01) (86) International application number: PCT/US2019/065545 (87) International publication number: WO 2020/123556 (18.06.2020 Gazette 2020/25)

(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: KH MA MD TN (30) Priority: 10.12.2018 US 201862777513 P (71) Applicant: Conocophillips Company Houston, Texas 77079 (US)	(72) Inventors: HAYES, Joshua C. Houston, Texas 77079 (US) HAYES, Leo C. Pagosa Springs, Colorado 81147 (US) FONTENOT, Kyle R. Lane Sealy, Texas 77474 (US) (74) Representative: Simpson, Paul Christopher  ConocoPhillips (U.K.) Limited 20th Floor Angel Court London EC2R 7HJ London EC2R 7HJ (GB)