1982-06-17
1984-03-20
Novosad, Stephen J.
Wells
Automatic
166 72, 166372, 137155, 417116, E21B 3416, E21B 4312
Patent
active
044375140
ABSTRACT:
Method and apparatus for dewatering a gas well in which the level of water in the well may be maintained at a fairly constant low level employing a diverter valve for introducing liquid into the tubing which valve is maintained closed when the liquid level drops below a selected level and employing a fluid responsive gas lift valve utilizing annulus gas to lift the liquid within the tubing from the well. The fluid operated valve may be closed by a constant force exerted on the valve member toward closed position or the force urging the valve member to closed position may be increased in response to a reduction in pressure in the annulus to close the gas lift valve when the annulus pressure reduces to a selected level.
REFERENCES:
patent: 3075475 (1963-01-01), Otis
patent: 3324803 (1967-06-01), Kelley et al.
patent: 3362347 (1968-01-01), Canalizo
patent: 3543848 (1970-12-01), Garrett
patent: 3580333 (1971-05-01), Douglas
patent: 3613712 (1971-10-01), Garrett
patent: 4295795 (1981-10-01), Gass et al.
Dang Hoang C.
Novosad Stephen J.
Otis Engineering Corporation
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