Flowmeter for use in a hydrocarbon well

摘要

The flowmeter comprises a central mandrel suspended from a cable and centered in the fluid stream so as to leave an annular passage. Fluid stream contracting means are provided for forming a venturi in the annular passage, and a differential pressure gauge is provided in the central mandrel to produce a signal representative of the pressure head loss across the venturi, which signal is processed to derive the flow rate.