Wells – Pistons – fluid driven into well – With stop
Patent
1988-05-13
1990-04-03
Kundrat, Andrew V.
Wells
Pistons, fluid driven into well
With stop
285 3, 285 18, 403 2, 403 31, E21B 3316, F16L 3708
Patent
active
049132296
ABSTRACT:
Connectors for connecting coilable tubing and other relatively thin walled tubing strings to downhole tools are provided which are releasable to permit withdrawal of the tubing without a member connected to the tubing that is substantially larger in diameter than the tubing itself. One embodiment of the connector includes a body member having plural collet fingers which are engagable with the tubing distal end through cooperating circumferential grooves and lands. The collet fingers are retained in gripping engagement with the tubing by a retainer sleeve having a piston head which catches a pump down ball to block a flow passage in the retainer and allow a fluid pressure force to shear plural shear screws which hold the retainer in the finger engaging position. Alternate embodiments includes recesses formed in the wall of the tubing for receiving ball keys which are held in registration with the recesses by the connector body and a cooperating slidable sleeve member.
REFERENCES:
patent: 4362211 (1982-12-01), Fisher, Jr.
patent: 4364587 (1982-12-01), Samford
patent: 4452472 (1984-06-01), Crase
patent: 4601492 (1986-07-01), George
patent: 4809776 (1989-03-01), Bradley
Atlantic Richfield Company
Cuomo Peter M.
Kundrat Andrew V.
Martin Michael E.
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