(19)
(11) EP 0 618 342 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.06.1995 Bulletin 1995/26

(43) Date of publication A2:
05.10.1994 Bulletin 1994/40

(21) Application number: 94302262.4

(22) Date of filing: 29.03.1994
(51) International Patent Classification (IPC)5: E21B 23/02, E21B 33/12, E21B 23/06
(84) Designated Contracting States:
GB NL

(30) Priority: 01.04.1993 US 41793

(71) Applicant: HALLIBURTON COMPANY
Dallas, Texas 75381-9052 (US)

(72) Inventors:
  • Cooksey, Andrew
    Coppell, Texas 75019 (US)
  • Williamson, Jim
    Carrollton, Texas 75007 (US)
  • Robison, Clark
    Plano, Texas 75025 (US)
  • Vick, James
    Dallas, Texas 75234 (US)
  • Dines, Chris, c/o Halliburton House
    London SW6 3JD (GB)

(74) Representative: Wain, Christopher Paul et al
A.A. THORNTON & CO. Northumberland House 303-306 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)


(56) References cited: : 
   
       


    (54) Wellbore lock system and method of use


    (57) A lock comprises a housing assembly (14); an actuation assembly (28) operatively associated with said housing assembly (14) and movable in relation to said housing assembly (14); at least one engagement member (24) coupled to said housing assembly (14), said engagement member being movable from a first position wherein said engagement member is substantially radially retracted relative to said housing assembly, to a second position wherein said engagement member is operatively extended relative to said housing assembly; and a sealing assembly (78) coupled to said housing assembly, said sealing assembly comprising an expandable seal element (80) and an expandable backup member (82), said seal element (80) and backup member (82) each having an interior surface, said seal element operatively associated with said actuation assembly to facilitate radial expansion of said interior surfaces of said seal element and said backup member upon predetermined movement of said actuation assembly.






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