Torque flowmeter

{
  "id": "MLC-T-OAG-003870",
  "term": "Torque flowmeter",
  "field": "Oil and gas",
  "definition": "A downhole flowmeter that infers fluid velocity from the torque the flowing fluid exerts on a stationary impeller, rather than from the speed of a freely turning one. The measured torque is related to the effective fluid velocity across the impeller and is converted to a flow rate using the pipe area. It contrasts with the spinner flowmeter, whose impeller rotates and is read in revolutions per second.",
  "subject": "Production Logging",
  "url": "https://mlchart.com/terminology/oil-and-gas/torque-flowmeter/"
}