Pressure monitoring of a producing well

Details Pressure monitoring of a producing well Pressure monitoring of a producing well

1992-06-29

1994-03-22

Dang, Hoang C.

Wells

Above ground apparatus

Well caps or casing heads

137460, 137462, 1375133, 166 91, 166319, 166324, E21B 3408

Patent

active

052955346

ABSTRACT:
A well pressure monitoring system in which a hydrocarbon fluid is being produced through a Christmas tree or similar flow controller apparatus. Well pressure is transmitted through a tap-off communicated to a pressure sensor. The pressure is thereafter transmitted to a base or control station. To avoid a major uncontrolled flow of the hydrocarbon from the well in the event of inadvertent breakage or accident to the monitoring system, an excess flow control valve is positioned between the well flow and the pressure sensor. The excess flow valve functions to cut off fluid flow, but is provided with a vent passage in the valve actuator through which a minimal amount of the hydrocarbon can escape. When the damage to the monitoring system has been overcome, the vent passage will allow a downstream pressure build-up in the closed system, thus permitting a biasing spring to automatically reset the valve to open and operable position, thereby stabilizing the pressure acting on the actuator.

REFERENCES:
patent: 2121936 (1938-06-01), Thomas
patent: 2806484 (1957-09-01), Schultz
patent: 3122162 (1964-02-01), Sands
patent: 3319717 (1967-05-01), Chenoweth
patent: 3561471 (1971-02-01), Sands
patent: 3712129 (1973-01-01), Rhoades
patent: 3794077 (1974-02-01), Fanshier
patent: 4080988 (1978-03-01), Robertson
patent: 4230187 (1980-10-01), Seto et al.
patent: 4574833 (1986-03-01), Custer
G. M. Raulins, SPE 3491, 4 pages.

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