(19)
(11) EP 2 050 922 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.03.2017 Bulletin 2017/10

(43) Date of publication A2:
22.04.2009 Bulletin 2009/17

(21) Application number: 08166631.5

(22) Date of filing: 15.10.2008
(51) International Patent Classification (IPC): 
E21B 17/042(2006.01)
 F16L 15/06(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 16.10.2007 IT MI20071992

(71) Applicant: Foxley Ventures LLC
Tappan, NY 10983 (US)

(72) Inventor:
  • Thompson, Jamie
    4520, Limassol (CY)

(74) Representative: Ripamonti, Enrico 
Giambrocono & C. S.p.A., Via Rosolino Pilo, 19/B
20129 Milano
20129 Milano (IT)

   


(54) Thread for roto-percussion drill pipe


(57) A roto-percussion pipe, comprising a tubular portion having at its ends a female coupling carrying a female thread, and a male coupling carrying a male thread, said male coupling and female coupling enabling the pipe to be connected to other pipes identical therewith to form a roto-percussion drill string of the required length, said threads having at least three starts.







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Search report