(19)
(11) EP 0 213 798 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.01.1989 Bulletin 1989/02

(43) Date of publication A2:
11.03.1987 Bulletin 1987/11

(21) Application number: 86306065.3

(22) Date of filing: 06.08.1986
(51) International Patent Classification (IPC)4: E21B 31/16, E21B 31/20
(84) Designated Contracting States:
DE GB NL

(30) Priority: 08.08.1985 GB 8519924

(71) Applicant: Tri-State Oil Tool (UK), a division of Baker Hughes Limited
Aberdeen AB2 OES (GB)

(72) Inventors:
  • MacKenzie, Colin
    Bridge of Don Aberdeen Scotland (GB)
  • McLeod, Arthur
    Aberdeen Scotland (GB)

(74) Representative: Pacitti, Pierpaolo A.M.E. et al
Murgitroyd and Company 373 Scotland Street
Glasgow G5 8QA
Glasgow G5 8QA (GB)


(56) References cited: : 
   
       


    (54) Packer retrieval assembly


    (57) There is described a tool for retrieving from an oil well bore a packer. The packer has a through bore through which the retrieval assembly passes. The retrieval assembly comprises an elongate body member (1) having a packer releasing milling cutter (2) and a packer retaining member (3) mounted thereon, the retaining member being releasable from a first position to a second position, the first position being such that an outer face of the packer retaining member defines a diameter greater than the diameter of the packer bore, thus preventing the assembly from entering the bore, and the second position being such that the outer face of the packer retaining member defines a diameter less than the diameter of the packer bore, thus permitting the assembly to enter the bore and extend from the packer, whereupon the retaining member may return to the said first position such that the retaining member may support the packer.







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