Dual Frequency Axial Impact Tool

Abstract

The invention relates to a double-frequency axial impact tool, which comprises an outer shell, an impact assembly, a speed reducer and a diversion assembly. The invention is characterized in that a drill column is connected to the upper part of the double-frequency axial impact tool; a spiral drilling rig or a turbodrill is connected to the lower part of the double-frequency axial impact tool; theimpact assembly, the speed reducer and the diversion assembly are assembled into an interior entire body; the interior entire body is loaded into the outer shell; a drilling fluid enters the outer shell; a turbine is driven to rotate at a high speed; the high-speed rotation of the turbine is reduced to a working speed suitable for a cam through the speed reducer; through the cooperated movement of the cam and a rolling wheel, an upper impact barrel, a lower impact barrel and an inner diversion barrel axially move cyclically, periodic axial mechanical vibration and hydraulic pulse are produced, the flow of a drilling fluid entering the spiral drilling rig or the turbodrill is periodically changed, and a drill produces a larger axial impact at a lower rotation speed and produces a smaller axial impact at a higher rotation speed. According to the double-frequency axial impact tool provided by the invention, the mechanical drilling speed and the service life of the drill can be effectively improved, and the rock breaking efficiency is improved.

Description

technical field [0001] The invention relates to a dual-frequency axial impact tool used in the field of oil and gas drilling engineering. Background technique [0002] With the continuous exploitation of oil and gas resources, more and more problems are faced in the drilling process. During the drilling process, formation hardness and drilling difficulty increase exponentially with the increase of well depth, especially in deep hard formations, there are problems of low drilling efficiency, short life of drilling tools, long drilling cycle and high drilling cost, which are serious Affecting the overall benefits of oil drilling and development, it is urgent to develop efficient rock-breaking drilling methods to improve the drilling efficiency of deep resources. Now the more effective drilling tools are mainly rotary percussion drilling tools, the most important part of which is what we call the impactor. Nowadays, there are many types of impactors used in various countries ...

AI Technical Summary

Problems solved by technology

During the drilling process, formation hardness and drilling difficulty increase exponentially with the increase of well depth, especially in deep hard formations, there are problems of low drilling efficiency, short life of drilling tools, long drilling cycle and high drilling cost, which are serious Affecting the overall benefits of oil drilling and development, it is urgent to develop efficient rock-breaking drilling methods to improve the drilling efficiency of deep resources

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