Well tubing coupling apparatus

Details Well tubing coupling apparatus Well tubing coupling apparatus

1979-08-20

1981-09-15

Leppink, James A.

Wells

Expansible anchor or casing

Fluid pressure actuated

166125, 166214, 285DIG21, 285DIG23, 285 18, E21B 4300, F16L 3500

Patent

active

042892023

ABSTRACT:
Well tubing coupling apparatus of the tubing seal divider type adapted for remote hydraulic release control to permit a tubing string including well tools above a packer to be removed for servicing from a lower tubing string extending through a packer while temporarily plugging the lower tubing string, such apparatus including a lower tubular housing section connectible on a lower tubing string and having a hydraulic lock and an upper housing section connectible on an upper tubing string adapted to mate with the lower housing section and having a latch operable with the hydraulic lock to releasably couple the housing sections together. Both annulus responsive and tubing responsive forms of the coupling apparatus are shown. An upper tubing string and the upper housing section is released from and reconnected with the lower tubing string and lower housing section by hydraulic pressure.

REFERENCES:
patent: 3005493 (1961-10-01), Crowe et al.
patent: 3645563 (1972-02-01), Rochelle
patent: 3842914 (1974-10-01), Mott
patent: 4008759 (1977-02-01), Blackwell

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