发明名称 |
Methods and apparatus for evaluating downhole conditions with RFID mems sensors |
摘要 |
A radio frequency identification (RFID) tag can include a die attached to an inductive-capacitive (LC) circuit including a capacitive element coupled to an inductive element. The LC circuit can have a resonant frequency that varies according to properties of fluid proximate the RFID tag. The RFID tag can further include a coating material disposed around the die to form an outer surface of the RFID tag. The coating material may have a thickness over a portion of the LC circuit, to permit a conductivity property of a fluid proximate the outer surface to affect the resonant frequency of the LC circuit such that the resonant frequency shifts to a second resonant frequency. Additional apparatus, systems, and methods are disclosed. |
申请公布号 |
GB2536819(A) |
申请公布日期 |
2016.09.28 |
申请号 |
GB20160007595 |
申请日期 |
2014.12.11 |
申请人 |
Halliburton Energy Services, Inc. |
发明人 |
Mark W Roberson;Craig W Roddy;Charles Bartee;Kristopher McGuire;Krishna Ravi;Ginger Rothrock;Scott Goodwin |
分类号 |
G06K19/07;E21B47/12;G06K19/077 |
主分类号 |
G06K19/07 |
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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