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Hydraulic release joint for tubing systems

  • US 4,984,632 A
  • Filed: 03/27/1989
  • Issued: 01/15/1991
  • Est. Priority Date: 03/27/1989
  • Status: Expired due to Term
First Claim
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1. A tubing coupling comprising:

  • (a) a first tubular body having an outer surface and a radially outwardly extending collet, and(b) a second tubular body having an inner bore and an outer surface and further including;

    (1) annular grove means for receiving said collet of said first tubular body;

    (2) an axially movable piston having an outer surface and including a collet retainer, said piston located within said inner bore of said second tubular body;

    (3) a detent retaining groove located on one of said outer surface of said piston and said inner bore of said second tubular body adjacent said piston, and(4) a cantilever spring having a detent which is retained within said detent retaining groove, said cantilever spring having leg portions and spring adjusters located between said leg portions of said cantilever spring and the other of said outer surface of said piston and said inner bore of said second tubular body,whereby differential pressure between internal pressure within said first and second tubular bodies and pressure acting on said outer surfaces of said first and second tubular bodies causes said piston to move axially against a force of said cantilever spring thereby releasing its detent from said detent retaining groove permitting release of said collet retainer from said collet so that an axial tension force can separate said first and second tubular bodies.

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