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(11)

EP 3 286 401 A1

(12)

(43) Date of publication: 28.02.2018 Bulletin 2018/09 (21) Application number: 16783882.0 (22) Date of filing: 21.04.2016

(51) International Patent Classification (IPC):  E21B 11/02(2006.01) F41A 1/04(2006.01) F41A 1/00(2006.01) E21B 7/00(2006.01) F41A 1/02(2006.01) (86) International application number: PCT/US2016/028704 (87) International publication number: WO 2016/172381 (27.10.2016 Gazette 2016/43)

(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: 21.04.2015 US 201562150836 P (71) Applicant: Hypersciences, Inc. Spokane, WA 99203 (US)	(72) Inventors: RUSSELL, Mark C. Spokane, Washington 99203 (US) ELDER, Timothy John Spokane, Washington 99203 (US) WOLFF, Jonathan M. Spokane, Washington 99203 (US) (74) Representative: EIP  EIP Europe LLP Fairfax House 15 Fulwood Place London WC1V 6HU London WC1V 6HU (GB)