Directional drilling execution mechanism based on three-speed drill bit

Abstract

The invention belongs to the technical field of drilling, and particularly relates to a directional drilling execution mechanism based on a three-speed drill bit. The directional drilling execution mechanism comprises a drill bit drill stem, a drill bit, a pressing support plate, pressing electromagnetic telescopic rods, a connection structure, a positioning mechanism, a motor, an electromagnetic telescopic support plate, rotation pairs and a universal joint, wherein the drill bit is connected with the motor through the drill bit drill stem, the connection structure, the universal joint and a motor revolving shaft; the universal joint is provided, so that the drill bit drill stem can still be driven by the motor to rotate after assuming a certain angle relative to the motor revolving shaft; the drill bit drill stem is arranged on the pressing support plate; three rotation pairs are added when two pressing electromagnetic telescopic rods are arranged on the pressing support plate and the pressing telescopic rod support plate; through the design, when the drill bit drills forwards, the drill bit is allowed to form a certain angle with the motor. By adopting the directional drilling execution mechanism, the angle between the drill bit drill stem and the motor revolving shaft can be controlled, directional drilling can be performed, and high practicability is achieved.

Description

[0001] Technical field [0002] The invention belongs to the technical field of drilling, and in particular relates to a directional drilling actuator based on a three-speed drill bit. Background technique [0003] At present, drilling equipment often adopts uphole power output, and the power is transmitted to the downhole drill bit through the drill string. When the depth of the drilled well is required to be very deep, an ultra-long-distance drill string is often spliced ​​by multiple drill strings. When the deep well being drilled is directional drilling, the shaft axis will have one or more inflection points, and the drill string will need to consider the transmission structure at the inflection points, which increases the complexity of the drilling equipment; therefore, designing a drilling equipment for downhole energy supply will This problem can be better solved, and adding a structure that can control the direction of the drill bit on the basis of independent energy ...

AI Technical Summary

Problems solved by technology

On the one hand, the former requires a motor to drive the oil pump to produce hydraulic oil with pressure. Because of the oil pressure, oil leakage is often prone to occur, and the requirements for oil cylinder technology and sealing technology are relatively high, resulting in high cost and complicated mechanism; for the latter, use Driven by a motor, the structure is simpler than the former, but because of the meshing transmission between the gear and the screw, when the load changes suddenly, it is easy to cause fatal damage to the push rod, that is, the range of use is narrow

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