Gas lift apparatus having condition responsive gas inlet valve

Details Gas lift apparatus having condition responsive gas inlet valve Gas lift apparatus having condition responsive gas inlet valve

1984-07-16

1986-06-24

Freeh, William L.

Pumps

Drilled well free piston-type pump

Having condition or position responsive control of motive...

166 53, 166369, 166372, 166265, F04B 4712, E21B 4300

Patent

active

045965161

ABSTRACT:
A novel gas lift apparatus is described which is particularly useful for the dewatering of gas wells in which the gas pressure is low or for the lifting of oil from wells when mixed oil and gas are produced. Water or oil is allowed to collect in the tubing above the valve of the apparatus. Sensors provide indications of the water level or the hydrostatic head within the tubing, and of the gas pressure in the casing. The outputs of the sensors are fed to an electronic, pneumatic or hydraulic controller which at a predetermined differential pressure opens the valve. Alternatively, a timer can be used to energize the valve at a predetermined time.

REFERENCES:
patent: 1803683 (1931-05-01), Taylor
patent: 1833778 (1931-11-01), Fletcher
patent: 2341359 (1944-02-01), Buckley
patent: 2714855 (1955-08-01), Brown
patent: 2838006 (1958-06-01), Garrett et al.
patent: 3090316 (1963-05-01), Montgomery
patent: 3410217 (1968-11-01), Kelley et al.
patent: 3427989 (1969-02-01), Bostock et al.
patent: 3897822 (1975-08-01), Mott
patent: 3941511 (1976-03-01), Morgan
patent: 4251191 (1981-02-01), Gass et al.
patent: 4417858 (1983-11-01), Stout

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