Method and arrangement for measuring conductive component content of a multiphase fluid flow and uses thereof
First Claim
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1. A method, comprising:
- performing an on-line measurement of a water fraction in a multi-phase flow of a multi-phase mixture in a pipe by measuring at resonance impedances of coils disposed about said pipe, said impedances varying as a function of a composition of conducting fractions present in the flow, and by employing said coils comprising;
a first coil including a first number of turns, said first coil optimized for measuring a continuous mixture of oil/gas, anda second coil including a second different number of turns, said second coil optimized for measuring a continuous mixture of water, whereinsaid coils are disposed in operation on an outer surface of said pipe, such that the coils are arranged so as to be driven at resonant frequencies of said coils in operation,wherein losses arising in the coils at resonance are determined by alternating from one of the coils to another thereof.
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Abstract
The present invention relates to a method and an arrangement of measuring conductive component content of a multiphase fluid flow and uses thereof. The claimed device comprises two coils arranged around the pipe containing the fluid to be measured, where the induced power loss in the mixture is determined, thereby determining the content of the conductive component. Alternatively, a number of coils are arranged on the outside surface of the fluid transporting pipe and the power loss or attenuation of magnetic field is determined.
31 Citations
14 Claims
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1. A method, comprising:
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performing an on-line measurement of a water fraction in a multi-phase flow of a multi-phase mixture in a pipe by measuring at resonance impedances of coils disposed about said pipe, said impedances varying as a function of a composition of conducting fractions present in the flow, and by employing said coils comprising; a first coil including a first number of turns, said first coil optimized for measuring a continuous mixture of oil/gas, and a second coil including a second different number of turns, said second coil optimized for measuring a continuous mixture of water, wherein said coils are disposed in operation on an outer surface of said pipe, such that the coils are arranged so as to be driven at resonant frequencies of said coils in operation, wherein losses arising in the coils at resonance are determined by alternating from one of the coils to another thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device, comprising:
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a first coil with a number of windings, said first coil optimized for measuring in operation a mixture of oil/gas flowing through a pipe; and a second coil with a different number of windings, said second coil optimized for measuring in operation a continuous mixture of water flowing through the pipe, such that the device is operable to provide an on-line measurement of a water fraction in the multi-phase flow by measuring coil impedances at resonance, said impedances varying in response to a proportion of conducting fraction present in the flow through the pipe, wherein said first coil and said second coil are arranged on an outside surface of the flow-conducting pipe for operating at resonance. - View Dependent Claims (12, 13, 14)
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Specification