A device for testing the dielectric properties of ice cores while drilling with the polar air drill

Abstract

A device for detecting the dielectric properties of ice cores while drilling with a core-taking rotary jet drill bit with polar air, the upper connecting body is connected to the ice core pipe; the upper connecting body has an upper bearing seat, and an upper thrust ball bearing is embedded in the upper bearing seat , the lower end of the upper thrust ball bearing is equipped with a bearing stop ring, the lower bearing seat is installed with a lower thrust ball bearing, the drill body is connected with the bearing stop ring, the drill body and the bearing stop ring can rotate synchronously, and the inside of the ice core tube has an ice core centralizer ;The ice core tube has a wire through hole, a low electrode, a middle annular gap, a high electrode and a protective electrode; the wall of the drill body has a guide gas protrusion, an ice core card breaker, a high pressure air guide hole, and a bottom lip surface Air guide holes, the cutter head is fixed at the bottom of the drill body. The invention can detect the dielectric properties of the ice core along with the drilling, and cooperates with the high-pressure air rotary jet drilling to avoid the influence of the liquid on the measurement accuracy. The drill bit body is single-moving, and the upper ice core tube does not rotate, which increases the stability of the drilling tool.

Description

technical field [0001] The invention is a device that can measure the dielectric properties of ice cores while drilling. In practical applications, the core-taking type rotary jet drilling can drill ice cores without drilling fluid, and the detection device while drilling can not extract ice cores to the surface for measurement. Dielectric properties of ice cores. Background technique [0002] The ice cores of the Antarctic continent are very important to people. From the obtained ice cores, the material components inside the ice cores can be analyzed, and then important information about the evolution of the Earth's ancient climate can be obtained. Since my country launched ice core drilling activities in Antarctica in 2012, the drilling footage and ice core drilling volume have made rapid progress, but the technology in ice core detection and control analysis is not very mature, and there are single testing methods and dependence on foreign countries. equipment, as well as...

AI Technical Summary

Problems solved by technology

Since my country launched ice core drilling activities in Antarctica in 2012, the drilling footage and ice core drilling volume have made rapid progress, but the technology in ice core detection and control analysis is not very mature, and there are single testing methods and dependence on foreign countries. equipment, and in-situ non-destructive testing and other disadvantages, we urgently need to develop a non-destructive, high-resolution ice core testing method to quickly and accurately obtain the composition and content of the ice core

At present, the methods of testing ice cores at home and abroad still only stop at taking ice cores to the surface for measurement, which leads to a large amount of distortion of ice core data

If you drill into the brittle ice area, there are highly compressed air bubbles inside the ice core, which are easily broken when taken to the surface

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