Underground control system, control method and application of underground control system and control method

Abstract

The invention belongs to the field of development of oil, water and gas wells and discloses an underground control system for the oil, water and gas wells. The integral system comprises an RFID (Radio Frequency Identification) passive tag, an RFID reader-writer, a wireless communication coil, a magnetic switch, a battery pack and a driving mechanism. The underground control system not only can be used for controlling connection and disconnection of valves in the oil, water and gas wells, but also can be used for regulating the opening of the valves and can be used for various process control and parameter testing in the production process of the oil, water and gas wells; and if sensors are arranged in valve carriers, information such as the temperature, the pressure and the flow inside the oil, water and gas wells, can be acquired by carrying out writing operation on the RFID electronic tag. The invention overcomes the defects that in the prior art, in the underground harsh environments of high temperature, high pressure, corrosion and the like, the valves cannot be accurately and reliably controlled, the valves are easily operated by mistake, the valves have low reliability in the long-term working process, the construction is complex, the occupied production time is long and the like.

Description

technical field [0001] The invention belongs to the field of oil, water and gas well development, and relates to a downhole measurement control system, in particular to a downhole control system, such as a valve control device. Background technique [0002] In the process of oilfield development, the control of controllable valves and other objects in downhole tools of oil and water wells has always been a technical problem that cannot be completely solved. The traditional methods include: applying a certain amount of liquid pressure at the wellhead to control the action of the valve, different pressures can cause different valves to produce corresponding actions, and laying cables or installing testing instruments to trigger the action of the downhole valves from the ground, so as to realize the control Manipulation of valve objects. [0003] RFID radio frequency identification is a non-contact automatic identification technology, commonly known as electronic tags. It aut...

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Problems solved by technology

[0005] The purpose of the present invention is to develop a downhole control system based on RFID technology to overcome the inaccurate and reliable valve control, easy misoperation of the valve, low reliability of long-term work, and difficult construction in the prior art in harsh environments such as high temperature and high pressure corrosion Disadvantages such as complexity and long production time

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