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Heat Pulse Flowmeter Tool
The heat pulse flowmeter consists of two very sensitive temperature sensors, one 5cm above and one 5cm below, a small heating element. The tool is positioned at a particular depth and left for a few minutes for the temperature sensors to stabilise.
A heat pulse is then generated and the temperature sensors monitored for a response. The time taken for the heat pulse to reach a given sensor is a function of the fluid velocity.
This tool is used in situations of very low fluid velocities where an impellor flow-meter would not be able detect any flow.
Specifications
Logging Conditions
- Readings taken when tool held stationary
Borehole Conditions
- Minimum diameter 60mm
- Water filled
- Unlined, screened or cased (detection or casing leaks)
Fluid velocity measurements using a heat pulse flowmeter