Method and apparatus for stimulating hydrocarbon wells

  • US 7,624,809 B2
  • Filed: 10/29/2007
  • Issued: 12/01/2009
  • Est. Priority Date: 12/09/2004
  • Status: Active Grant
First Claim
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1. A downhole tool, comprising;

  • a body having a recess formed therein, the recess adapted to receive a pivotable valve member having at least one concave surface;

    a valve seat disposed within the body; and

    a shiftable sleeve disposed within the body,wherein the sleeve, in a first position, is adapted to contain the pivotable valve member within the recess and seal the recess against entry of debris, and the sleeve, in a second position, is adapted to release the pivotable valve member allowing the pivotable member to engage the valve seat, wherein an end of the sleeve is adapted to sealingly engage the valve seat, andwherein the valve seat has an O-ring disposed thereon and the end of the sleeve is adapted to seal against the O-ring.

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