Mechanical drilling impactor

Abstract

The invention provides a mechanical drilling impactor comprising at least a drilling rod and a drilling rod joint. An upper part of the drilling rod is sleeved with an impact unit. A lower part of the drilling rod is provided with a transmission unit. The transmission unit comprises an external hexagonal joint, an inner hexagonal joint, a conversion joint and an O-type sealing ring. The impact unit comprises an impact hammer, a bearing and a shifting block. When the shifting block rotates to a notch of an inclined surface of the impact hammer, the impact hammer falls under the effect of gravity and then impacts the inner hexagonal joint and the conversion joint. Then the shifting block continues rotating. When the shifting block rotates out of the notch of the inclined surface, the shifting block pushes up the impact hammer. The provided drilling impactor powered by rotation of the drilling rod has following advantages: simple structure and easy operation. The operation of the impactor is not impacted by factors such as flushing fluid flow or sand content. The impactor is not provided with easily damaged parts such as springs and impact energy of the impactor is adjustable. The impactor can be widely applied in environment such as deep hole, high temperature or high pressure. By use of the impactor, drilling efficiency and drilling quality are increased; drilling cost and construction period are reduced.

Description

Technical field [0001] The invention belongs to the field of drilling, and in particular relates to a mechanical drilling impactor. It can be widely used in the drilling field of geology, petroleum, hydropower, coal, metallurgy and other sectors. Background technique [0002] Percussion rotary drilling is an effective technical means to improve drilling efficiency. The key component to realize percussive rotary drilling is the impactor. At present, the most commonly used impactor in production is a hydraulic impactor, which can significantly improve drilling efficiency, but there are still some shortcomings in actual use, such as strict requirements for flushing fluid flow and sand content, use and maintenance Difficulties, short life due to wearing parts, etc., these problems make the hydraulic impactor unable to be widely used in production practice. [0003] Therefore, it is an urgent need in the art to provide a purely mechanical drilling impactor, but there is currently no d...

AI Technical Summary

Problems solved by technology

At present, the most commonly used impactor in production is the hydraulic impactor, which can significantly improve the drilling efficiency, but there are still some shortcomings in the actual use process, such as strict requirements on the flow rate and sand content of the flushing fluid, use and maintenance Difficulty, short life due to the existence of wearing parts, etc. These problems prevent the large-scale application of hydraulic impactors in production practice

[0003] Therefore, it is an urgent need in this field to provide a purely mechanical drilling hammer, but there is no device in this field that can meet this requirement

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