Key technologies and development trend of magnetic-coupling wired drill pipe

As a high-speed downhole network communication component, magnetic-coupling wired drill pipe makes use of the coaxial cable in the water hole to perform high-speed signal transmission and takes advantage of the magnetic-coupling coil at both ends of the drill pipe to conduct wireless communication between drill pipes. Owing to the application of magnetic-coupling communication, the magnetic-coupling wired drill pipe has no effect on conventional drilling processes, such as pipe connection. Based on the coordination of functional components (e.g. data server, wireless nipple, relay, downhole unit and various wired drilling tool), magnetic-coupling wired drill pipe system can realize networking communication of surface and downhole data. And it has the transmission characteristics of high speed, two ways and all weather. The key technologies of magnetic-coupling wired drill pipe include high-speed modem, downhole token ring, virtual serial port, distribution parameter measurement, etc. The downhole token ring based on high-speed modem is an efficient networking technology. The virtual serial port technology is convenient for the third-party factory to connect its measurement tool quickly by using the magnetic-coupling wired drill pipe. The distribution parameter measurement provides full-hole state monitoring at lower cost and plays an important role in managed pressure drilling, well control safety and drilling parameter optimization. Intelligent (automatic) drilling is the development trend of drilling industry, and magnetic-coupling wired drill pipe is applicable to intelligent (automatic) drilling due to its unique characteristics. Based on the reduction of application cost, magnetic-coupling wired drill pipe will have a broader market further.