Abstract
According to the special working environment of drilling proposed design parameters of distance sleeve; The Ansoft Maxwell software is used to optimize the magnetic coupling, and the optimized design process is illustrated with an example; The torque is studied under different rotation angles; The effects of magnetic steel thickness, magnet thickness and magnetic pole number on torque are studied respectively; With the development of the rare earth permanent magnet material, it is imperative to apply the no leakage magnetic coupling to petroleum drilling.
Highlights
Measurement while drilling is the basis for oil drilling to realize intellectualization, informatization and automation
Information transmission is the bottleneck of measurement while drilling technology, including four information transmission modes of electromagnetic wave, intelligent drill pipe, drilling fluid pressure pulse and acoustic wave, wherein drilling fluid pressure pulse further includes three modes of positive and negative pulse as well as continuous wave
Compared with other information transmission modes in measurement while drilling, drilling fluid continuous wave has the advantages of high transmission rate, low cost, high safety and reliability, etc
Summary
Measurement while drilling is the basis for oil drilling to realize intellectualization, informatization and automation. Compared with other information transmission modes in measurement while drilling, drilling fluid continuous wave has the advantages of high transmission rate, low cost, high safety and reliability, etc. It is the preferred way of underground information transmission. In continuous wave signal generator system, rotary valve is a flow passage component, which is exposed to rapid flow drilling fluid. The drive parts, such as motor, speed reducer, etc., are sealed in a cavity so that the rotation dynamic seal between the rotor shaft and the body is a weak link of the system.
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