Research And Application Of A New Wireless Communication System In Controllable Eccentric Stabilizer

At present, In the oil field exploration and development process, undergroundinformation onto the surface of the real-time transmission has become one of the keytechniques questions. In recent years, wireless measurement technology while drilling(MWD)in petroleum engineering technology development has become a major research direction.Because the complicated underground environment and the drill string channel high ambientnoise, the limited frequency band, transmission delay, intersymbol interference is serious andso on, It great impact the reliability and efficiency of information. It is important to find areliable signal transmission technology, solve the ground system and downhole signalbidirectional communication and transmission speed and depth.In this paper, based on theloosely coupled transformer and QBUS mode of wireless transmission system, to improveddownhole signal transmission performance.Loosely coupled wireless signal transmission system is a new type of informationtransmission technology. In this paper, based on the domestic and foreign researches, design asignal transmitting module, a matching network, coupling model, receiving module and otherkey components actually, so that through the QBUS circuit for transmission, improve the datatransmission reliability and efficiency. Emphasis on the coupling transformer signaltransmission characteristics, summarized the loosely coupled signal transmission accuracyinfluence factor, and theoretically derivate the circuit frequency matched compensation.Finally, It proved that the loosely coupled wireless signal transmission system in MWD isfeasibility.Through this subject, build a loosely coupled wireless transmission system, the QBUSand loose coupling technology applied in underground environment, improving the signalreliability and anti-interference ability, provides a new means of communication for drillingenvironment downhole data transmission. It has a important reference value to down-holeinformation transmission promotion and loosely coupled deeply application.