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Hydraulically set well packer

  • US 4,487,258 A
  • Filed: 08/15/1983
  • Issued: 12/11/1984
  • Est. Priority Date: 08/15/1983
  • Status: Expired due to Fees
First Claim
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1. A hydraulically set well packer, for forming a fluid barrier at a downhole location within a well bore, having a mandrel means with packing elements and anchoring means carried on its exterior and a longitudinal bore extending therethrough, comprising:

  • a. a shoulder on the exterior of the mandrel means;

    b. a setting sleeve surrounding a portion of the mandrel means and longitudinally slidable relative thereto;

    c. piston means slidably disposed on the exterior of the mandrel means and operatively engaging the setting sleeve;

    d. the packing elements and anchoring means positioned between the shoulder and the setting sleeve;

    e. an annular recess formed in a portion of the setting sleeve;

    f. flexible collet fingers attached to the mandrel means;

    g. a collet head on the end of each finger; and

    h. means for releasably engaging the collet heads with the annular recess.

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