All-metal dynamic seal concentric righting type underground volume motor

Abstract

The invention relates to the field of motors, in particular to an all-metal dynamic seal concentric righting type underground volume motor comprising an outer pipe, a stator fixedly connected in the outer pipe, a rotor rotationally connected in the stator and a flow distribution shaft installed in the rotor in a suspended mode, an annular cavity is formed between the outer pipe and the stator, and an inner cavity of the stator is oval. The upper end of the flow distribution shaft is connected with drilling fluid, and flow distribution holes are formed in the flow distribution shaft. A containing groove is formed in the side wall of the rotor, rotor copper bars are placed in the containing groove, a circulating opening is formed in the portion, in the direction facing each rotor copper bar, of the inner wall of the rotor, when the rotor rotates, the multiple circulating openings communicate with the flow distribution holes in a staggered mode, and a containing space allowing the drilling fluid to flow in is formed among the multiple rotor copper bars. Each circulating opening forms a notch communicating with the containing space on one side of the corresponding rotor copper bar. The stator is provided with pressure relief openings communicating with the annular containing cavity and the containing space, and the flow distribution holes and the pressure relief openings are arranged in a staggered mode in the circumferential direction. The all-metal dynamic seal concentric righting type underground volume motor can meet the requirement for high-temperature drilling in deep wells and ultra-deep wells.

Description

technical field [0001] The present application relates to the field of motors, in particular to an all-metal dynamic seal concentrically escalated downhole volume motor. Background technique [0002] At present, the drilling tools used in geological exploration, hot dry rock drilling and high temperature drilling are mainly turbo drilling tools and screw drilling tools. Downhole power drilling tools that are converted into mechanical energy. [0003] The turbo drilling tool is a non-displacement downhole power motor with high speed and low torque, which is not ideal for breaking hard and hard rock formations. Therefore, when crushing hard rock formations, positive displacement screw drilling tools are widely used because of their high torque characteristics, which can meet the needs of hard rock formations. [0004] In a conventional screw drill motor, the stator part includes a stator metal casing and a rubber bushing. The inner cavity of the stator metal casing is a smoo...

AI Technical Summary

Problems solved by technology

[0005] In geological exploration, hot dry rock drilling and high temperature drilling, with the increase of downhole temperature, the stator bush made of rubber in the screw motor is not a high temperature resistant part, so it seriously affects the performance of the screw motor when it is used downhole. The performance and service life cannot meet the needs of deep well and ultra-deep well drilling

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