(19)
(11) EP 0 810 348 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.08.2000 Bulletin 2000/32

(43) Date of publication A2:
03.12.1997 Bulletin 1997/49

(21) Application number: 97303345.9

(22) Date of filing: 16.05.1997
(51) International Patent Classification (IPC)7: E21B 23/02
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 29.05.1996 US 654944

(71) Applicant: Halliburton Energy Services, Inc.
Dallas, Texas 75381-9052 (US)

(72) Inventors:
  • Dickson, Rennie L.
    Carrollton, Texas 75007 (US)
  • Reesing, David L.
    Irving, Texas 75060 (US)
  • Vinzant, Michael B.
    Carrollton, Texas 75006 (US)

(74) Representative: Wain, Christopher Paul et al
A.A. Thornton & Co. 235 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)

   


(54) Up-to-set lock mandrel and method of operation thereof


(57) An up-to-set lock mandrel (10) for registering with a locating profile (14) recessed in a sidewall (16) of a well conduit portion (12). The up-to-set lock mandrel (10) comprises a generally cylindrical body (20) and a locating key (22) coupled to the body (20) and biased to be urged from a seeking position toward a no-go position. The locating key (22) has a no-go profile (26) thereon contoured to engage the locating profile (14) when the locating key (22) is in the no-go position, to thereby function as a no-go for the up-to-set lock mandrel (10).






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