(19)
(11) EP 2 935 758 A1

(12)

(43) Date of publication:
28.10.2015 Bulletin 2015/44

(21) Application number: 13865824.0

(22) Date of filing: 17.12.2013
(51) International Patent Classification (IPC): 
E21B 17/042(2006.01)
E21B 19/16(2006.01)
(86) International application number:
PCT/US2013/075646
(87) International publication number:
WO 2014/099902 (26.06.2014 Gazette 2014/26)
(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

(30) Priority: 18.12.2012 US 201213717885

(71) Applicant: Longyear TM, Inc.
South Jordan, UT 84095 (US)

(72) Inventors:
  • DRENTH, Christopher, L.
    Draper, UT 84020 (US)
  • LITTLELY, Keith, William
    Guilderton Western Australia 6041 (AU)

(74) Representative: Walker, Stephen 
Lincoln IP 9 Victoria Street
Aberdeen Aberdeenshire AB10 1XB
Aberdeen Aberdeenshire AB10 1XB (GB)

   


(54) DRILL STRING COMPONENTS RESISTANT TO JAMMING