Wireline releasable seal connector for wellpipe strings

A releasable connector comprising an inner tubular body having an external shoulder between its ends;

• an outer tubular body having an internal shoulder opposing said external shoulder, said outer body having first and second longitudinally spaced grooves internally thereof;
• collet means between said bodies having first collet fingers having end lugs engaged with said internal shoulder and resiliently flexible to release said lugs from said internal shoulder;
• said collet means having second collet fingers having end lugs engageable with said grooves and flexible to allow movement of said bodies relatively longitudinally to shift said end lugs of said second collet fingers selectively into said first and second grooves upon opposite relative longitudinal movement of said bodies;
• said internal shoulder of said outer body engaging said first collet fingers to prevent flexing thereof when said lugs on said second collet fingers are in said first groove and said internal shoulder of said outer body being held spaced from said first collet fingers to permit flexing thereof when said lugs on said second collet fingers are in said second groove.

In tubular structure adapted to extend into a well bore;

• a packer structure having means sealingly engageable and anchorable in the well bore, a tubing string connected with said packer structure, and a releasable tubing connector in said tubing string;
• said connector comprising:
• an inner tubular body;
• an outer tubular body telescopically engaged with said inner body;
• releasable means for releasably securing said bodies to each other, first latch means releasably secured to said outer body;
• second latch means connected to said first latch means and releasably secured to said inner body;
• said releasable means being released in response to initial longitudinal movement of said outer body upwardly of said inner body to release said outer body from said first latch means;
• first holding means on said outer body extending under and engaging said second latch means to hold said second latch means secured to said inner body;
• downward movement of said outer body relative to said first and second latch means disengaging said outer body from said second latch means and reconnecting said first latch means to said outer body to permit release of said second latch means from said inner body and allow said outer body to be elevated from said inner body.