Oil Well Data Exchange System

Abstract

The invention discloses an oil well data exchange system for realizing data transmission between a ground operating platform and an underground device. The system comprises a ground reader-writer, a low-frequency RFID (radio frequency identification) tag and an underground data processing subsystem. The underground data processing subsystem comprises an antenna arranged on an oil well pipeline, a read-write module and a common memory. The ground reader-writer writes data into the low-frequency RFID tag, the read-write module reads the data in the low-frequency RFID tag and the data are stored in the common memory; and if the read-write module is judged to download the tag, the data information in the tag is sent to the underground device; and if the read-write module is judged to upload the tag, the data stored in the common memory by the underground device are written into the low-frequency RFID tag, and the ground reader-writer reads the data. The system realizes bidirectional data transmission above and below the well by using the low-frequency RFID tag as a medium, plays a role in buffering the data through the common memory, and does not need to distribute or acquire the data for the underground device at the same time of reading / writing the tag so as to shorten the data reading / writing time and improve the reliability.

Description

technical field [0001] The invention belongs to a system capable of exchanging data between a downhole device and an uphole platform, in particular to an oil well data exchange system based on RFID technology. Background technique [0002] The data transmission or control from the oil drilling platform to the downhole device has always been a technical problem in oil drilling. Due to the special environment downhole, such as salt water, high temperature over 120°C, and pressure of tens of MPa, ordinary radio devices cannot work normally, and the cost of laying cables or hydraulic lines is very high, and the implementation is also difficult. The traditional relatively mature method generally uses a mechanical trigger method to trigger the downhole mechanical device by throwing a metal ball to control the downhole valve, etc.; or the downhole device starts to work automatically by means of delayed opening. Other methods, such as US Patent Publication No. US2009 / 0044937, trans...

AI Technical Summary

Problems solved by technology

However, the data flow can only be one-way, and the problem of backhaul or feedback of downhole data is not considered; and downhole devices include not only valves, but also some sensing equipment for monitoring downhole temperature, pressure and other environmental parameters. Those who have a greater demand for data return, which can meet the real-time monitoring of the downhole environment to a certain extent, so as to make more efficient decisions

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