Device for detecting dielectric property of ice core while drilling in combination with polar-air core-drilling type rotary jetting drill bit

Abstract

The invention discloses a device for detecting the dielectric property of an ice core while drilling in combination with a polar-air core-drilling type rotary jetting drill bit. An upper connector ofthe device is connected with an ice core pipe; the upper connector is provided with an upper bearing block; an upper thrust ball bearing is embedded in the upper bearing block; a bearing baffle ring is arranged at the lower end of the upper thrust ball bearing; a lower thrust ball bearing is arranged on a lower bearing block; a drill bit body is connected with the bearing baffle ring; the drill bit body and the bearing baffle ring can rotate synchronously; an ice core centralizer is arranged in the ice core pipe; the ice core pipe is provided with a wire through hole, a low-position electrode,a middle annular gap, a high-position electrode and a protective electrode; the wall of the drill bit body is provided with a gas flow guide bump, an ice core clamping and breaking device, a high-pressure air flow guide hole and a bottom-lip-surface air flow guide hole; a tool bit is fixed at the bottom of the drill bit body. The device can detect the dielectric property of the ice core while drilling, and combination with high-pressure air rotary jet drilling avoids the influence of liquid on measurement accuracy. The drill bit body acts independently, and the upper connector, the ice core pipe and the like do not rotate, so that the stability of the drilling tool is improved.

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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