초록 ▼

A system for evaluating multiphase flow of a fluid downhole in a borehole. Dielectric permittivity electrodes generate a capacitance output signal through the fluid, and conductivity electrodes generate a conductivity output signal through the fluid. The electrodes are powered with an AC generator o

A system for evaluating multiphase flow of a fluid downhole in a borehole. Dielectric permittivity electrodes generate a capacitance output signal through the fluid, and conductivity electrodes generate a conductivity output signal through the fluid. The electrodes are powered with an AC generator operating at the same or different frequencies. The capacitance and conductivity output signals can be alternately generated by operating a controller, and such signals can be combined with a multiplexer engaged with the controller. The signal can be processed downhole or can be transmitted to a receiver positioned at the well surface for processing and interpretation of the multiphase data.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for evaluating multiphase flow of a fluid downhole in a borehole, comprising:a housing insertable in the borehole at a desired downhole position;a flow space within said housing for permitting movement of the fluid through said flow space;an array of first an

[ What is claimed is:] [1.] An apparatus for evaluating multiphase flow of a fluid downhole in a borehole, comprising:a housing insertable in the borehole at a desired downhole position;a flow space within said housing for permitting movement of the fluid through said flow space;an array of first and second dielectric permittivity electrodes in contact with the fluid in said flow space for producing a capacitance output signal;an array of first and second conductivity electrodes in contact with the fluid in said flow space for producing a conductivity output signal;an electric power source engaged with said dielectric permittivity electrodes and with said conductivity electrodes; anda controller for receiving said capacitance output signal and said conductivity output signal.