Oil well water injection control device based on self-adaptive frequency-stabilization RFID technology

Oil well water injection control device based on self-adaptive frequency-stabilization RFID technology

  • CN 105,735,950 A
  • Filed: 01/29/2016
  • Published: 07/06/2016
  • Est. Priority Date: 01/29/2016
  • Status: Active Grant
First Claim
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1. the flushing based on self adaptation frequency stabilization RFID technique controls device, it is characterised in that include water filling sleeve pipe, RFID tag ball, down-hole RFID controller, down-hole RFID environment adaptation device and water injection valve, wherein,Described RFID tag ball is for carrying water injection valve aperture size instruction and moving downward with the current in water filling sleeve pipe;

  • Described down-hole RFID controller includes tag read module and down-hole reading and writing device antenna, described tag read module and described down-hole reading and writing device antenna are installed on the inwall of described water filling sleeve pipe, antenna frame that described down-hole reading and writing device antenna includes hollow and the solenoid antenna being wrapped on antenna frame, one end of described solenoid antenna is connected with described tag read module and the other end adapts to device with described down-hole RFID environment and is connected, described tag read module for being written and read operation to the RFID tag ball moving to antenna frame inner chamber, to obtain water injection valve aperture size instruction, thus controlling the aperture of water injection valve;

    Described down-hole RFID environment adapts to device and includes phase measurement module, PWM output module and controlled capacitance array module, wherein, described phase measurement module compares for the square-wave signal sine wave signal that down-hole reading and writing device antenna exports being changed into square-wave signal and the chip with tag read module sends, and then exports the phase contrast of two square waves to PWM output module;

    Described PWM output module controls the electric capacity of controlled capacitance array module based on described phase contrast, to adjust the electric capacity of controlled capacitance array module, so that the circuit generation resonance that tag read module, down-hole reading and writing device antenna and controlled capacitance array module are constituted, in order to RFID tag ball is written and read by tag read module.

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