Measuring and testing – Specific gravity or density of liquid or solid
Reexamination Certificate
2006-01-17
2006-01-17
Noland, Thomas P. (Department: 2856)
Measuring and testing
Specific gravity or density of liquid or solid
C073S061790, C073S064440
Reexamination Certificate
active
06986276
ABSTRACT:
The disclosed apparatus comprises a phase fraction meter and a compliant mandrel deployable within a production pipe, and may further comprise a flow velocity meter. The mandrel allows the determination of the phase fraction for a fluid comprising three phases by providing an additional cross sectional compliance within the conduit, thereby allowing the density of the fluid to be determined. The mandrel also provides a specified blockage through the flow velocity meter, thereby increasing flow velocity through the meter. This allows flow rate measurements in conditions under which flow velocity in the under-restricted cross-sectional area of the pipe would normally be very low. Further, the mandrel can provide a specified restriction in the pipe, i.e., a venturi. By measuring the differential pressure across the venturi and utilizing the measured fluid velocity from the flow velocity meter, the density of the fluid mixture can be calculated. This calculated density can be used in conjunction with other measurements to determine phase fractions or to double check or to calibrate the phase fraction meter. The mandrel can be deployed without removing the meter from the conduit, allowing for easy adaptation to changing flow parameters and fluid compositions.
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