发明名称 Sensor protection from downhole fluids
摘要 <p>Sensors such as transducers for use in the oil and gas industries are protected by a buffer system which has a first chamber (140) open to the environment (eg. well fluid), a second chamber (22) fluidly connected to the first chamber (140) by a first conduit (130); a sensor chamber (26) fluidly connected to the second chamber (22) by a fluid conduit (104) and having a transducer (32); the two conduits and chambers being filled with a viscous liquid and arranged to prevent well fluids reaching the transducer even over an extended period of time. The first conduit (130) can employ capillary repulsion to impede entrance of wellbore fluid, and the second conduit can be an extended curled capillary, entrance to the curled capillary being located proximate the bottom of second chamber (22). <MATH></p>
申请公布号 EP0695853(A3) 申请公布日期 1997.05.21
申请号 EP19950304500 申请日期 1995.06.27
申请人 HALLIBURTON COMPANY 发明人 ZELLER, VINCENT PAUL
分类号 E21B47/01;(IPC1-7):E21B47/06;E21B47/00 主分类号 E21B47/01
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