A vortex tube heat preservation sampling drilling tool

Abstract

The invention discloses a vortex tube type heat preservation sampling drilling tool which comprises a double-wall drilling rod, a heat-insulation heat preservation layer, a coring barrel, a vortex tube, an upper rolling bearing, a lower rolling bearing, a hot-melt drilling bit and a spiral blade. The heat-insulation heat preservation layer is arranged on the inner wall of the double-wall drilling rod in a clinging manner, the coring barrel is arranged inside the heat-insulation heat preservation layer, the spiral blade is coaxially arranged on the outer side of the coring barrel, and a cold air spiral channel is formed between the heat-insulation heat preservation layer, the coring barrel and the spiral blade; the vortex tube is arranged at the upper end of the double-wall drilling rod. The vortex tube type heat preservation sampling drilling tool has the advantages that the vortex tube type heat preservation sampling drilling rod is simple in process, high in acquisition efficiency for rock core samples of ice cores and natural gas hydrate in plateau frozen soil districts and low in disturbance on primary statues of the ice cores and the natural gas hydrate; outstanding effects can be realized during coring and drilling; air is used as power, accordingly, the vortex tube type heat preservation sampling drilling tool is free of pollution, additional external mechanical torque can be omitted, the service life and the reliability of the vortex tube type heat preservation sampling drilling tool can be guaranteed, the problem of insufficient water resources in the plateau frozen soil districts can be solved, and the integral cost performance of the vortex tube type heat preservation sampling drilling tool can be greatly improved.

Description

technical field [0001] The invention relates to a rock core sampling drilling tool, in particular to a vortex tube heat preservation sampling drilling tool. Background technique [0002] At present, the prospect of the country investing in the development of the polar regions is becoming more and more broad. The ice core samplers being used, such as the cable-suspended gas partial reverse circulation electromechanical core drilling tool (201210258991.4), although meeting the environmental protection requirements of polar drilling, are armored The cable is used as the rope for hanging the drilling tool. During the drilling process, due to the rotation of the drill bit, the armored cable will vibrate and rotate irregularly, which will affect the life of the armored cable. Moreover, the construction is difficult and the process is cumbersome. In addition, the irregular vibration It will cause disturbance to the ice core, affect the original state, and is not conducive to the fo...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of difficulty in collecting ice cores and cumbersome coring process in the Antarctic base drilling project, and provide a vortex tube type thermal insulation sampling drilling tool. The vortex tube type ice core insulation sampling drilling tool with little disturbance in the original state; in addition, it can solve the problems of insufficient water resources and low coring efficiency for drilling and sampling of plateau permafrost-type natural gas hydrate

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