Electronically controlled gas lift apparatus

Details Electronically controlled gas lift apparatus Electronically controlled gas lift apparatus

E - Fixed Constructions

21

B

166/26

E21B 43/00 (2006.01) E21B 34/06 (2006.01) E21B 43/12 (2006.01) E21B 43/38 (2006.01)

Patent

CA 1212312

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 is allowed to collect in the tubing above the valve of the apparatus. Electronic sensors provide indications of 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.

432476

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