Measurement while drilling mud generator with speed regulation function

Abstract

The invention discloses a measurement while drilling mud generator with a speed regulation function. The mud generator comprises a mud impeller, a magnetic coupling transmission device, a generator shell, a generator stator, a generator rotating shaft, a speed regulating motor stator, a speed regulating circuit and a speed measuring sensor. One end of the magnetic coupling transmission device is fixedly connected with the mud impeller while the other end is fixedly connected with the generator rotating shaft, the magnetic coupling transmission device is arranged in the generator shell, and the generator stator and the speed regulating motor stator are fixed to the inner wall of the generator shell. The input end of the speed regulating circuit is connected with the output end of the speed measuring sensor, and the rotating speed of a motor is regulated according to an induction value of the speed measuring sensor. The rotating speed of the motor is more stable, output voltage is smoother, output electric energy is higher in quality, motor efficiency is improved while service life is prolonged by the aid of the stable rotating speed, and performance of the motor is better.

Description

technical field [0001] The invention relates to the field of oil exploitation and detection, in particular to a mud generator with a speed regulating function for measurement while drilling. Background technique [0002] The measurement-while-drilling (MWD) technology of the petroleum industry is a main direction of oilfield technical services. After nearly 10 years of development, it has become relatively mature abroad. The downhole power supply is the key equipment of MWD. With the development of drilling technology, the mine depth and horizontal well length of oil and gas reservoir resources increase. MWD measuring instruments and related institutions have long working hours, high functional requirements, and many types of measurement parameters. The downhole control mechanism tends to be refined and complicated. Furthermore, it is required that the MWD downhole power supply can work reliably for a long time, so as to provide continuous and stable power for the system. ...

AI Technical Summary

Problems solved by technology

Ordinary battery packs can withstand a temperature of about 160 degrees Celsius, which gradually cannot meet the requirements

Drilling stops caused by battery replacement will increase drilling costs and easily cause seal leakage. In addition, waste batteries pollute the environment and are not environmentally friendly.

Therefore, lithium batteries, as the mainstream power supply downhole, have been difficult to meet the power needs of measurement instruments while drilling, control tools and deep well drilling.

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