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Downhole oil and gas well jacking tool for use with coil tubing unit

  • US 5,370,180 A
  • Filed: 12/02/1993
  • Issued: 12/06/1994
  • Est. Priority Date: 12/02/1993
  • Status: Expired due to Fees
First Claim
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1. An oil and gas well downhole jacking tool for retrieving articles that are stuck in the well bore of a downhole oil and gas well that is defined by a well casing, comprising:

  • a) a coil tubing unit having a reel at the earths surface with coil tubing wound thereon and a free end that can pay into the bore of the oil and gas well, wherein the coil tubing has a bore for conveying fluids from the earth'"'"'s surface area to the well bore;

    b) a tool body having an upper end portion with means for forming a connection with the free end of the coil tubing;

    c) the tool body having a lower end portion with means for forming a connection with the article to be retrieved;

    d) the tool body including an elongated mandrel having a central longitudinal bore that communicates with the bore of the coil tubing;

    e) slip means carried by the tool body for anchoring the tool body to the casing of the well bore;

    f) piston means, concentrically positioned about the mandrel for moving the slip means between engaged and disengaged positions;

    g) fluid operable chamber means positioned between the mandrel and the piston means for moving the piston means relative to the mandrel responsive to the introduction of pressurized fluid into the central longitudinal bore;

    h) the slip means being positioned on the tool body so that position of the piston is fixed relative to the casing once the slip means anchors the tool body to the casing of the well bore; and

    i) wherein the mandrel travels upwardly relative to the casing when fluid expands the chamber to move the piston after the slip means anchors the tool body to the casing wall.

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