Portable piston gas prover for field calibration of flowmeters
- Chevron Oil Field Research Co. (US)
- Oil and Gas Specialties Co. (US)
This paper describes a newly developed, unique piston-gas-prover system and its advantages for on-site gas flowmeter calibration to improve measurement accuracy. The gas prover was tested at a natural gas flow calibration facility and at the Colorado Engineering Experimental Station Inc. (CEESI) to demonstrate its measurement performance, repeatability, and accuracy. The piston prover, with a design similar to that of an existing piston liquid prover, is bidirectional and uses a special piston to move gas through a calibrated section of known volume. It is constructed to perform on-site calibration of such flowmeters as gas turbine or orifice meters at operating conditions. The unit can easily be set up in series with a field meter for calibration. Less than 4 in. of water pressure drop is required to operate the piston through the calibrated section. In the evaluation tests, a master turbine meter was calibrated on unprocessed natural gas. Test results show turbine pulse-count repeatability to be {plus minus} 0.05%. The accuracy of the piston prover was also checked in series with an air calibration system at CEESI. This study showed that on-site calibration of a gas metering device can be conducted successfully with a portable piston-gas-prover system to improve flow measurement accuracy.
- OSTI ID:
- 5784045
- Journal Information:
- SPE (Society of Petroleum Engineers) Production Engineering; (United States), Vol. 6:4; ISSN 0885-9221
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FLOWMETERS
DESIGN
NATURAL GAS
PISTONS
ACCURACY
CALIBRATION
COLORADO
GAS FLOW
GAS METERS
RESERVOIR ENGINEERING
DEVELOPED COUNTRIES
ENERGY SOURCES
ENGINEERING
FEDERAL REGION VIII
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
MEASURING INSTRUMENTS
METERS
NORTH AMERICA
USA
032000* - Natural Gas- Transport
Handling
& Storage