发明名称 |
Subsea hydrocarbon sensor system |
摘要 |
A hydrocarbon detection system is provided for use in a subsea hydrocarbon production installation which includes production tree assemblies, an electro-hydraulic control module located on the sea floor and remote from the production trees, cable assemblies interconnecting the control module with the production trees through magnetic coupling devices. A pair of inductive elements are electrically coupled by the surrounding sea water. Displacement of the conductive sea water by escaping hydrocarbons affects the coupling between the inductive elements to produce a hydrocarbon-presence-responsive output signal. The inductive elements are resonated within a selected frequency range by capacitors coupled with a primary inductor coil by auxiliary windings on a common core element. An excitation signal sweeps over the selected frequency range at a rate effective to produce a peak detected signal at the resonant frequency. The peak output signal is then monitored to form a control signal functionally related to the presence or absence of hydrocarbons in the sea water.
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申请公布号 |
US4282487(A) |
申请公布日期 |
1981.08.04 |
申请号 |
US19790078944 |
申请日期 |
1979.09.26 |
申请人 |
TRW INC. |
发明人 |
WARREN, WALTER B.;MAROSKO, RONALD J. |
分类号 |
G01N27/02;(IPC1-7):G01N27/02 |
主分类号 |
G01N27/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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