Directionally rotating type air hammer

Abstract

The invention discloses a directionally rotating type air hammer, mainly consisting of an insulating mechanism, an air distribution rotating mechanism, a piston assembly and a drill bit, wherein the insulating mechanism comprises an upper joint, a swivel joint, a check valve, a spring, a spring seat placement valve core, a spring seat and a shell; the air distribution rotating mechanism is arranged in the insulating mechanism, and comprises a revolving axle, an air distribution seat, an air inlet pipe, a rear air cavity and a front air cavity; the top of the air distribution seat is fixedly connected with the spring seat, and the bottom of the same is provided with a plurality of saw-toothed convex cones in an annular array manner; the upper end of the air inlet pipe is connected with the air distribution seat, the lower end of the same is inserted into the piston assembly, and the air inlet pipe is provided with an air inlet; the piston assembly is arranged in the insulating mechanism, and comprises a piston, a snap ring and a half snap ring; the top of the piston is provided with a plurality of convex cones matched with the saw-toothed convex cones on the bottom of the air distribution seat in an annular array manner; the piston is provided with air intakes in radial direction respectively communicating with the rear and the front air cavities; the drill bit is connected with a spline joint by a spline; and the tail of the drill bit is connected with a drill bit tail pipe. The directionally rotating type air hammer is strong in practicability.

Description

technical field [0001] The invention belongs to the field of oil and natural gas drilling equipment, and in particular relates to a drilling tool for underbalanced drilling in the oil and natural gas drilling process. More specifically, it relates to a directional rotary air hammer, which is suitable for use in horizontal wells, It is used in well conditions such as directional wells and extended reach wells. Background technique [0002] The gas drilling technology uses the air hammer to break the rock with the power of high-pressure gas, which is more than 10 times faster than the drilling speed of the general rotary drilling machine, which has very obvious advantages. In order to increase the drilling speed of drilling machinery and speed up the progress of drilling projects, air hammer drilling has been widely used in oil and gas well drilling industries at home and abroad. However, ordinary air hammers cannot rotate by themselves due to structural limitations, and can ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a directional rotary air hammer that has an impact function and can output a large torque at the same time, which overcomes the inability of the existing common air hammer to operate in horizontal wells, directional wells and Technical bottlenecks in the use of long branch wells and other well conditions

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