(19)
(11) EP 3 164 569 A1

(12)

(43) Date of publication:
10.05.2017 Bulletin 2017/19

(21) Application number: 15736149.4

(22) Date of filing: 29.06.2015
(51) International Patent Classification (IPC): 
E21B 43/12(2006.01)
(86) International application number:
PCT/US2015/038293
(87) International publication number:
WO 2016/003890 (07.01.2016 Gazette 2016/01)
(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

(30) Priority: 01.07.2014 US 201462019566 P

(71) Applicant: Shell Internationale Research Maatschappij B.V.
2596 HR Den Haag (NL)

(72) Inventors:
  • FREEMAN, Steven Terry
    Cypress, Texas 77433 (US)
  • MABRY, Wayne J.
    Humble, Texas 77346 (US)
  • SHUMILAK, Edward Eugene
    Houston, Texas 77041 (US)
  • TYLER, Kenneth Frank
    Houston, Texas 77079 (US)

(74) Representative: Matthezing, Robert Maarten et al
Shell International B.V. Intellectual Property Services P.O. Box 384
2501 CJ The Hague
2501 CJ The Hague (NL)

   


(54) HYDRAULIC LOCK COMPENSATING DUMMY VALVE