Refrigeration – Processes – Circulating external gas
Patent
1983-12-05
1984-07-31
Sever, Frank
Refrigeration
Processes
Circulating external gas
62 20, 62 21, 62 29, 62 37, 62 40, F25J 300, F25J 500
Patent
active
044628137
ABSTRACT:
A method of converting natural wellhead gas to liquefied petroleum gases (LPG) may comprise the steps of: separating natural gas from petroleum fluids exiting a wellhead; compressing the natural gas; refrigerating the natural gas, liquefying at least a portion thereof; separating LPG from gas vapors of the refrigerated natural gas; storing the separated LPG in a storage tank with a vapor space therein; and recirculating a portion of the LPG vapors in the storage tank with the natural gas exiting the wellhead to enhance recovery of LPG. A system for performing the method may comprise: a two-stage gas compressor connected to the wellhead; a refrigeration unit downstream of the gas compressor for refrigerating the compressed gases therefrom; at least one product separator downstream of the refrigerator unit for receiving refrigerated and compressed gases discharged from the refrigeration unit and separating LPG therein from gases remaining in vapor form; and a storage tank for receiving and storing the separated LPG therein, the storage tank having a vapor space therein connected upstream of the gas compressor through a pressure regulator allowing recirculation of some LPG vapors with the natural gases through said system.
REFERENCES:
patent: 2198098 (1940-04-01), Vaughan
patent: 2217749 (1940-10-01), Hewitt
patent: 2814936 (1957-12-01), Morrison
patent: 2896414 (1959-07-01), Tung
patent: 2900796 (1959-08-01), Morrison
patent: 3791157 (1974-02-01), Tracy et al.
May Ronald L.
Sinclair Bobby W.
Berryhill Bill B.
Sappsucker, Inc.
Sever Frank
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