Study and Application of Downhole Wireless Intelligent Production Adjustment Technology

In view of the shortcomings of traditional downhole throttling production adjustment mode(replacing downhole flow nipple by wireline operation)such as long operation cycle, high cost and high risk, with the realization of intelligent natural gas production control by remote wireless control downhole production adjustment as the objective, the mechanical engineering, microcomputer, automatic control and wireless communication technologies were comprehensively applied to study the key technologies such as the design of mechanical system structure of CAD/CAE based wireless control downhole choke, the design of gas pressure wave based coding and decoding method and wellhead pressure wave based coding technology, and the design of control algorithm of wireless control downhole choke. In addition, based on the remote wireless control downhole intelligent throttling method and the control principle, a wireless control downhole choke was developed and applied in the field. The application results show that the overall performance of the wireless control downhole choke is stable, and the pressure wave wireless control technology is reliable. It has been successfully applied in the downhole wireless intelligent production adjustment in gas wells, and has the characteristics of simple operation, low cost and low risk. This technology provides a new solution for the automatic control of wellbore in smart oil and gas fields, and the proposed methods and ideas also have certain reference significance for the development of other downhole intelligent tools.