CFJ meaning in oil and gas
CFJ means Continuous Flowmeter Jewelled. The Jewelled Bearing Continuous Flowmeter is run at the bottom of the production logging string in combination with a Capacitance/Temperature/Flow tool or CFJ Electronics…
Definition
Continuous Flowmeter Jewelled
The Jewelled Bearing Continuous Flowmeter is run at the bottom of the production logging string in combination with a Capacitance/Temperature/Flow tool or CFJ Electronics cartridge. The tool has low friction jewelled bearings to reduce the mechanical threshold of the spinner and improve sensitivity to fluid flow. The spinner is an ideal design for use in high velocity wells. Rotation is sensed by zero drag Hall effect sensors, allowing the measurement of flow rate. Normal output is 10 pulses per revolution with directional indication.