System and method for converting wellhead gas to liquefied petroleum gases (LPG)
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 refrigerator 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.
- Assignee:
- Sappsuker Inc.
- Patent Number(s):
- US 4462813
- OSTI ID:
- 6532184
- Resource Relation:
- Patent File Date: Filed date 5 Dec 1983; Other Information: PAT-APPL-557852
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LIQUEFIED NATURAL GAS
PRODUCTION
LIQUEFIED PETROLEUM GASES
SEPARATION PROCESSES
COMPRESSED GASES
COMPRESSION
GAS COMPRESSORS
NATURAL GAS
NATURAL GAS WELLS
PRESSURE REGULATORS
REFRIGERATION
REFRIGERATORS
STORAGE
WELLHEADS
COMPRESSORS
CONTROL EQUIPMENT
COOLING
ENERGY SOURCES
EQUIPMENT
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
LIQUEFIED GASES
LIQUIDS
NATURAL GAS LIQUIDS
PETROLEUM PRODUCTS
WELLS
030400* - Natural Gas- Products & By-Products