Research And Application Of Loosely Coupled Technology In The Rotary Steerable Drilling

Rotary steering drilling coefficient after completion in acquisition can real-time transmission only to the ground, which can manifest the superiority of the intelligent steering drilling, and currently MWD wireless communication module is unstable,which seriously impacts on the reliability of the downhole data transmission. Therefore, in this design, the special environment of wireless transmission to simulate in-well transmission environment is to research information transmission in underground.MWD wireless communication simulation system, through to simulate in-well environment, to a certain extent, reductives in-well environment,which provides possible of exploring underground wireless transmission. This thesis, embarks from the reality, designed a MWD wireless communication simulation system, made a wireless transmitting and receiving system. Focusing on the wireless transmission of simulated environment, the author summarizes the wireless transmission environment influence of factors, and makes a detailed theoretical derivation about wireless transmission module antenna length, and presents related antenna length suggestion.The author designs MWD communication detection,and writes short-circuited the two versions of the PC receiving software.Through this topic research, it’s the MWD communication simulation system and communication detection short sub that are made, and suggestion of improving wireless transmission system is helpful to solve the wireless transmission problem.