(19)
(11) EP 1 570 263 A1

(12)

(43) Date of publication:
07.09.2005 Bulletin 2005/36

(21) Application number: 03753822.0

(22) Date of filing: 20.10.2003
(51) International Patent Classification (IPC)7: G01N 33/20, G01N 17/00
(86) International application number:
PCT/GB2003/004517
(87) International publication number:
WO 2004/040297 (13.05.2004 Gazette 2004/20)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 30.10.2002 US 422379 P

(71) Applicants:
  • Grant Prideco LP
    Texas 77056 (US)
  • Bailey, Richard Alan
    Gloucestershire GL50 1RQ (GB)

    GB 

(72) Inventor:
  • URBAND, Bruce, E.
    Houston, TX 77042 (US)

(74) Representative: Bailey, Richard Alan 
Marks & Clerk, 27 Imperial Square
Cheltenham, GL50 1RQ
Cheltenham, GL50 1RQ (GB)

   


(54) A METHOD OF ESTABLISHING STRESS RELIEVING PROCEDURES FOR MINIMIZING SULFIDE STRESS CRACKING IN COLD WORKED METALS