(19)
(11) EP 3 303 756 A1

(12)

(43) Date of publication:
11.04.2018 Bulletin 2018/15

(21) Application number: 16730118.3

(22) Date of filing: 27.05.2016
(51) International Patent Classification (IPC): 
E21B 17/06(2006.01)
(86) International application number:
PCT/US2016/034734
(87) International publication number:
WO 2016/191716 (01.12.2016 Gazette 2016/48)
(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: 28.05.2015 US 201562167349 P

(71) Applicant: Weatherford Technology Holdings, LLC
Houston, TX 77056 (US)

(72) Inventors:
  • KILLOH, Ian Raymond
    Northampton Norfolk NR3 2QH (GB)
  • BARANNIKOW, Ivan Andre
    Houma, Louisiana 73060 (US)

(74) Representative: Talbot-Ponsonby, Daniel Frederick 
Marks & Clerk LLP Fletcher House Heatley Road The Oxford Science Park
Oxford OX4 4GE
Oxford OX4 4GE (GB)

   


(54) COMBINATION WELL CONTROL/STRING RELEASE TOOL