Measuring and testing – Volume or rate of flow – Using differential pressure
Reexamination Certificate
2005-02-15
2005-02-15
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Volume or rate of flow
Using differential pressure
Reexamination Certificate
active
06854341
ABSTRACT:
A differential pressure flow rate measurement apparatus comprises:a conduit having a flow passage for conveying a fluid flow, the conduit being adapted for connection to a downhole fluid flow line having a bore of predetermined transverse cross-sectional area;a flow energy dissipator which partially obstructs the flow passage and which is capable of imparting an angular velocity to the fluid flow and thereby causing a dissipative pressure drop in the fluid; anda pressure sensor for measuring said pressure drop.The flow passage, when viewed in the axial direction of the flow passage, projects an unobstructed transverse cross-sectional area which is at least 25% of the transverse cross-sectional area of said bore.
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Fitzgerald John Barry
Oddie Gary Martin
Stephenson Kenneth E.
Batzer William B.
Curington Tim
Lefkowitz Edward
Schlumberger Technology Corporation
Thompson Jewel V.
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