A hole bottom tubular linear motor electric impactor

Abstract

The invention relates to a hole bottom tubular linear motor electric impactor, which comprises a motor outer cylinder, a permanent magnet rod, a linear ball bearing, a mover, a mover silicon steel sheet, and a mover coil. The outer cylinder of the motor is the shell of the linear motor, the permanent magnet rod is fixed on the outer cylinder of the motor, and the permanent magnet rod is used as the stator of the linear motor; the mover moves relative to the permanent magnet rod through the linear ball bearing; The iron core is composed of silicon steel sheets. There are slots in the iron core, and mover coils in the slots; the coils use three-phase AC windings, which are used to connect to three-phase symmetrical alternating current, and generate a traveling wave magnetic field that is consistent with the moving direction of the mover; There are two shock absorbing springs for shock absorption. The impactor adopts a moving coil structure, that is, the permanent magnet rod and the iron core are fixed, and the coil moves. At the same time, a buffer gasket is designed between the mover and the base to improve the anti-fatigue life of the impactor. The impactor has a simple and firm structure, low manufacturing and maintenance costs, easy adjustment of impact stroke speed and frequency, high efficiency, and can be used for deep hole drilling.

Description

technical field [0001] The invention relates to a motor design technology, in particular to a tube-type linear motor electric impactor at the bottom of a hole. The impactor of the invention can be widely used in geological equipment, geology, oil drilling engineering, and drilling engineering, and can replace Existing hydraulic impactor and pneumatic impactor. Background technique [0002] At present, there are two types of impactors commonly used in geological and oil drilling engineering: hydraulic impactors and pneumatic impactors. These two types of impactors have the following problems in use: [0003] 1) Working parameters cannot be adjusted downhole, remote control is difficult, and it cannot adapt to the development trend of drilling equipment automation. It is difficult to adjust the impact stroke frequency of traditional hydraulic or pneumatic impactors. Usually, after going downhole, the impact can only be started according to the pre-adjusted impact energy and i...

AI Technical Summary

Problems solved by technology

[0003] 1) Working parameters cannot be adjusted downhole, remote control is difficult, and cannot adapt to the development trend of drilling equipment automation

It is difficult to adjust the impact stroke frequency of traditional hydraulic or pneumatic impactors. Usually, after going downhole, the impact can only be started according to the pre-adjusted impact energy and impact frequency, and it is impossible to make appropriate adjustments to the impact parameters according to different formations.

As soon as the surface mud pump or air compressor starts to run, the impactor is in working condition, and it cannot be controlled by the surface after it starts working underground; when it is necessary to stop working in an emergency, the mud pump or air compressor must be turned off, which may cause burnout. drilling and other accidents

It is impossible to make accurate analysis and identification of possible situations such as air strikes, blocked waterways, and stuck impactors, and can only be judged subjectively by the staff on the surface based on experience

It can no longer meet the needs of today's drilling equipment for a higher degree of automation

[0004] 2) High-power auxiliary facilities are required, with low efficiency and high energy consumption

[0005] 3) Unable to meet some special drilling conditions

However, when performing deep hole and ultra-deep hole operations, when the fluid medium carrying energy required by the hydraulic impactor passes through a long drill string, a relatively large pressure loss (leakage) will occur. This phenomenon occurs in ultra-deep hole drilling. especially evident in the process

In addition, the back pressure of the upward fluid during vertical hole drilling will also affect the performance of the hydraulic impactor, and in severe cases, the impactor will not work

In addition, there are problems such as leakage of the inner cylinder measuring channel and short working life of the jet element, because the average life of the jet element is 60-100h, which seriously affects the drilling efficiency

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