Wells – Processes – Producing the well
Patent
1994-12-20
1997-06-10
Dang, Hoang C.
Wells
Processes
Producing the well
166 53, 166 911, 166372, E21B 4316
Patent
active
056366930
ABSTRACT:
Gas in association with liquids is produced from a wellbore by disposing a first tubing string having a first fluid communication path into the wellbore to near or below the bottom of a producing zone, disposing within the annulus between the first tubing string and the outer surface of the wellbore a second fluid communication path from near or below the bottom of the producing zone to an offtake line at the surface, disposing a choke means in at least one of the fluid communication paths, and producing gas while controlling the choke means to establish sufficient gas flow up the first fluid communication path so as to unload liquids from near or below the bottom of the producing zone and produce the liquids up the first tubing string in association with gas flow. In accordance with a preferred embodiment, the first tubing string has a sufficiently small diameter that liquids can be unloaded from the well over life of the production. Preferably, the choke means is a valve automatically controlled by differential pressure controller measuring pressure differential across an orifice plate in the first fluid communication path.
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"A Practical Approach to Removing Gas Well Liquids", Edward J. Hutlas and William R. Granberry, Journal of Petroleum Technology, Aug., 1972, pp. 916-922.
"Gas Well Operation With Liquid Production", SPE 11583, Society of Petroleum Engineers, J. F. Lea, Jr. and R. E. Tighe, pp. 307-319.
Conoco Inc.
Dang Hoang C.
Holder John E.
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