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Downhole oil well tool running and pulling with hydraulic release using deformable ball valving member

  • US 5,695,009 A
  • Filed: 10/31/1995
  • Issued: 12/09/1997
  • Est. Priority Date: 10/31/1995
  • Status: Expired due to Fees
First Claim
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1. A downhole oil well pulling and running tool comprising:

  • a) an elongated tool body having an upper end portion with means thereon for forming a connection with a workstring;

    b) the tool body comprising a main body portion that is tubular, having upper and lower end portions, said main body having a bore;

    c) an elongated generally tubular piston slidable within the main body bore;

    d) a piston lock for locking the piston in a first running position;

    e) the piston having a valve seat portion;

    f) a deformable ball valving member for forming a closure with the valve seat, the valving member being a separate ball member that can be dropped into the tool bore from the well surface area via the workstring, the ball valving member, the tool body, the bore of the main body, and the workstring being so configured that the ball valving member can be transmitted from the well surface area to the valve seat via the workstring and tool body bore;

    g) a cage member disposed below the valve seat;

    h) a channel that extends between the valve seat and the cage member;

    i) passage means for transporting the ball valving member from the seat to the cage member, wherein the ball valving member is sized to fit the seat forming a seal therewith, and wherein the ball valving member is deformable to conform to the passage means during transport to the cage member.

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