Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent
1989-07-03
1990-03-13
Novosad, Stephen J.
Wells
Above ground apparatus
Having retractable pipe section to allow closing of gate...
166 84, 166 86, 166 97, E21B 3303
Patent
active
049076507
ABSTRACT:
A wellhead for a polished rod pumping unit to provide emergency closure of the bore through the wellhead in the event of breakage of the polished rod. The valve assembly includes a flapper valve mounted on a swivel pin for movement between a vertical open position and a horizontal closed position across the wellhead bore. The flapper valve is spring biased toward the open position. A well pressure responsive cylinder and piston assembly is mounted on the side of the wellhead with an operating rod into the wellhead against the flapper valve to move the valve from the open position to a horizontal closed position. The piston is exposed to well pressure on the one side urging the piston outwardly to the valve open position and a spring engages the piston on the opposite side biasing the piston inwardly toward the valve closed position when well pressure is not sufficient to keep the spring compressed. One form of the wellhead includes a packing assembly for sealing around the polished rod. A second embodiment includes only the valve assembly which is used with a standard packing assembly. A third embodiment of the wellhead includes a swivel mounted packing assembly to permit the polished rod to deviate from the vertical. The swivel mounted packing assembly may include a ball swivel member and ball swivel guide for holding said ball swivel against rotation while permitting the ball swivel to tilt.
REFERENCES:
patent: 1830205 (1931-11-01), McLaine
patent: 2563155 (1951-08-01), Cardwell
patent: 3078921 (1963-02-01), Edwards
patent: 3424247 (1969-01-01), Lee
patent: 3532163 (1970-10-01), Ecuer
patent: 3821984 (1974-07-01), Lee
patent: 3939910 (1976-02-01), Bruce
patent: 4099562 (1978-07-01), Mattoon
patent: 4109713 (1978-08-01), Clow
patent: 4266605 (1981-05-01), LaBorde
patent: 4415026 (1983-11-01), Rezewski et al.
Double E, Inc.
Melius Terry Lee
Novosad Stephen J.
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