发明申请
US20140111349A1 METHODS AND APPARATUS FOR EVALUATING DOWNHOLE CONDITIONS WITH RFID MEMS SENSORS
有权
用于评估RFID MEMS传感器的井下条件的方法和装置
- 专利标题: METHODS AND APPARATUS FOR EVALUATING DOWNHOLE CONDITIONS WITH RFID MEMS SENSORS
- 专利标题(中): 用于评估RFID MEMS传感器的井下条件的方法和装置
-
申请号: US14145524申请日: 2013-12-31
-
公开(公告)号: US20140111349A1公开(公告)日: 2014-04-24
- 发明人: Mark W. Roberson , Craig W. Roddy , Charles Bartee , Kristopher McGuire , Krishna M. Ravi , Ginger Rothrock , Scott Goodwin
- 申请人: Mark W. Roberson , Craig W. Roddy , Charles Bartee , Kristopher McGuire , Krishna M. Ravi , Ginger Rothrock , Scott Goodwin
- 申请人地址: US TX Houston
- 专利权人: Halliburton Energy Services, Inc.
- 当前专利权人: Halliburton Energy Services, Inc.
- 当前专利权人地址: US TX Houston
- 主分类号: E21B47/12
- IPC分类号: E21B47/12 ; G06K19/077
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.