Downhole gas phase space rotary swing drilling tool and implementation method thereof

Abstract

The invention relates to a gas phase space rotary swing drilling tool for drilling and a mud guide-out method. The gas phase space rotary swing drilling tool comprises a liquid separation cover, a liquid separation wheel, a turbine, a coupling cylinder, a magnetic coupling rotor, a coupling inner shaft, a pendulum cylinder, pendulums, a backflow joint, an outer cylinder and a lower joint. The gasphase space rotary swing drilling tool is mounted between a drill bit and a drill collar. Mud in a drilling well enters from a mud inlet and is guided and impacts on the turbine through the liquid separation cover and the liquid separation wheel, the turbine rotates rapidly, the magnetic coupling rotor drives the coupling inner shaft to rotate synchronously, and the coupling inner shaft which is connected with the pendulums in the pendulum cylinder transmits rotating force to the pendulums to rotate at high speed, so that drilling mud flows along an annular space between the outer cylinder andthe pendulum cylinder into the backflow joint, flows into the lower joint through a hole of the backflow joint, and is guided into the next part of the drilling tool. The gas phase space rotary swingdrilling tool has the effects that drilling dragging and sticking and slipping are reduced, the drilling efficiency is improved, the jamming accidents of the drilling tool are reduced, and the gas phase space rotary swing drilling tool can be applied to an existing drilling system without modifying the existing drilling system.

Description

technical field [0001] The invention relates to a well drilling tool, in particular to a downhole gas phase space rotary oscillating drilling tool and a realization method. Background technique [0002] At present, there are two major factors affecting drilling efficiency. One is stick-slip drilling. Downhole, the movement of PDC bit is extremely disordered, including lateral, longitudinal and torsional vibrations and combinations of these vibrations. Under normal drilling conditions, the PDC bit can continuously break the shear formation. When drilling hard, consolidated formations with a PDC bit, there is often not enough torque to break up the formation, causing the bit to stop turning momentarily. At this point, torque energy begins to build up in the drill string. The drill string is twisted like clockwork, and once the torque required to shear and break the formation is reached, the torque energy in the drill string is suddenly released. The drill bit will break roc...

AI Technical Summary

Problems solved by technology

On the one hand, the towing pressure affects the normal directional construction and reduces the drilling speed and footage; on the other hand, if the operation is not done properly, it may cause sticking

[0003] The current drilling tools cannot simultaneously and efficiently solve the problems of drag pressure and stick-slip, so it is necessary to design a new type of drilling speed-increasing tool to achieve the above goals

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