(19)
(11) EP 2 904 183 A1

(12)

(43) Date of publication:
12.08.2015 Bulletin 2015/33

(21) Application number: 13843704.1

(22) Date of filing: 24.09.2013
(51) International Patent Classification (IPC): 
E21B 10/38(2006.01)
(86) International application number:
PCT/US2013/061341
(87) International publication number:
WO 2014/055287 (10.04.2014 Gazette 2014/15)
(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: 02.10.2012 US 201261709063 P

(71) Applicant: Varel International, Ind., L.P.
Carrollton, TX 75006 (US)

(72) Inventor:
  • KING, William W.
    Houston, TX 77069 (US)

(74) Representative: Hunt-Grubbe, Henry 
Gill Jennings & Every LLP The Broadgate Tower 20 Primrose Street
London EC2A 2ES
London EC2A 2ES (GB)

   


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