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US 4,757,709 AGranted
Flowmeter for use in a hydrocarbon well
AssigneeSchlumberger Technology Corporation
InventorJean A. Czernichow
Life of this patent
Estimating the term…
Abstract
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.
Claims7
A device for measuring the flow rate of a fluid stream in a hydrocarbon well, comprising:
- a central mandrel adapted to be suspended from a cable in the well,
- means for centering the mandrel in the fluid stream to define an annular flow passage,
- fluid stream contracting means for creating a restriction in said annular flow passage,
- a differential pressure gauge located in the mandrel and responsive to the pressure head loss resulting from said restriction, for generating a signal indicative of the flow rate of the fluid stream.
1 more element
Dependencies are inferred from the claim text.