Safety plug for sealing-off the tubing of a producing oil or gas

Details Safety plug for sealing-off the tubing of a producing oil or gas Safety plug for sealing-off the tubing of a producing oil or gas

1974-11-12

1976-05-04

Purser, Ernest R.

Wells

Packers or plugs

Controllable passage through packer

137 68R, 166224A, E21B 3312, E21B 4312, F16K 1736

Patent

active

039541380

ABSTRACT:
A safety plug for sealing-off the tubing in a deep producing well comprises a body fitted within the tubing by means of O-ring seals, an axial valve having two heads in opposition which are capable of being applied against top and bottom seatings of the body, and an axial push-rod unit connected to the valve. The push-rod unit as well as the valve are positioned with respect to the body and with respect to the top and bottom seatings by means of shearing-pins, a spring being placed between the valve and the lower end of the body.

REFERENCES:
patent: 1839861 (1932-01-01), Baker
patent: 2342367 (1944-02-01), Pryor
patent: 2656151 (1953-10-01), Miller
patent: 2919709 (1960-01-01), Schwegman
patent: 3250331 (1966-05-01), Boyle
patent: 3735813 (1973-05-01), Mack et al.
patent: 3794057 (1974-02-01), Badger

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