Downhole flow meter

Details Downhole flow meter Downhole flow meter

2005-03-01

2005-03-01

Dang, Hoang (Department: 3672)

Wells

With electrical means

Indicating

C166S113000, C166S250070, C073S152290, C073S152520

Reexamination Certificate

active

06860325

ABSTRACT:
This invention comprises the use of a variable orifice valve as a flow controller and flow meter. Pressure measurements are taken upstream and downstream of the variable orifice valve by way of a differential pressure measurement mechanism. The differential pressure measurement mechanism may comprise two separate absolute pressure measurement devices or a single differential pressure measurement device. Flow rate through the valve is determined from the pressure drop across the valve. In wellbores having multiple zones, a variable orifice valve together with a differential pressure measurement mechanism may be deployed for each zone. The flow rate through each of the zones and at the surface can then be monitored and controlled.

REFERENCES:
patent: 3454085 (1969-07-01), Bostock
patent: 4083245 (1978-04-01), Osborn
patent: 4221134 (1980-09-01), Ekstrom, Jr.
patent: 5831156 (1998-11-01), Mullins
patent: 5861562 (1999-01-01), Pringle et al.
patent: 5970801 (1999-10-01), Ciobanu et al.
patent: 5996687 (1999-12-01), Pringle et al.
patent: 6561277 (2003-05-01), Algeroy et al.

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