Walking dual-swing downhole drill

Abstract

The invention discloses a walking dual-swing downhole drill, which comprises a pile frame main body and a drilling main body, wherein the drilling main body comprises an upper power head, a lower power head, an outer sleeve, a spiral drill stem and a downhole hammer; the upper power head is connected with the top end of the spiral drill stem; the bottom end of the spiral drill stem is connected with the downhole hammer; the upper power head drives the spiral drill stem and the downhole hammer to rotate clockwise when working; the lower power head is connected with the outer sleeve and drives the outer sleeve to rotate anticlockwise when working; the downhole hammer comprises an impacter and an impact hammer; the hammer head of the impact hammer is exposed out of the lower opening of the outer sleeve; a high-pressure gas channel is arranged inside the drilling main body, and the high-pressure gas passes through the upper power head, a buffer, the spiral drill stem and the impacter and is finally blown outwards from the bottom part of the impact hammer. The walking dual-swing downhole drill has main characteristics of taking soil to form a hole by a dry method without pollution, and being adapted to various geologies and stratums, such as hard lithosphere, tundra, sand bed with abundant underground water, a rubble layer and boulder, which are difficult to drill by other pile drivers.

Description

technical field [0001] The invention relates to a construction engineering machine, in particular to a walking double-circle down-the-hole drilling rig. Background technique [0002] Drilling rigs (pile drivers) are mainly used in construction sites. Most of the drilling rigs in the prior art use wet hole forming technology, that is, during the drilling process, a large amount of water needs to be added to the soil layer to turn the soil layer into mud before outputting, and the pile holes can be gradually formed. Disadvantages of this kind of drilling rig: it has a lot of pollution, needs a lot of water resources, and cannot adapt to complex strata such as hard rock layers, frozen soil layers, sand layers with rich groundwater, gravel layers, and boulders. There are also a small number of drilling rigs that use dry hole forming technology, which can adapt to more complex geological environments, but requires frequent action of the bucket to output the soil layer, so that t...

AI Technical Summary

Problems solved by technology

Disadvantages of this type of drilling rig: high pollution, need to consume a lot of water resources, can not adapt to complex strata such as hard rock layers, frozen soil layers, sand layers rich in groundwater, gravel layers, boulders, etc.

There are also a small number of drilling rigs that use dry hole forming technology, which can adapt to more complex geological environments, but the excavator needs to move frequently to output the soil layer, so that the pile holes can be gradually formed, and the work efficiency is low.

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