Hot-water core drilling method and device for polar region ice layer

Abstract

The invention discloses a hot-water core drilling method and a device for a polar region ice layer. The device comprises a hot-water pipe, a cable, a cable terminal, a bottom-contacting detecting mechanism, a water distribution connector, an upper reverse-twisting device, an electric chamber, a lower reverse-twisting device, a screw motor, a lower-portion double-pipe drilling tool and a drill bit. The method comprises the steps that hot water is utilized to serve as power medium to drive a hole-bottom drilling tool to rotate to complete core drilling, the hot water is transported to the hole-bottom drilling tool by adopting a pipeline, meanwhile, the cable is utilized to supply power to sensors and a communication module in the drilling tool, and it is achieved that the earth surface monitors the drilling parameters in a hole; the ice-layer cutting drill bit drills downwards though rotary cutting, the influence of full hole drilling of the hot-water drill on the ice core quality is avoided, and meanwhile flake ice generated by cutting is taken away by the hot water from a hole bottom, and is melted in the process of being transported upwards; reverse-twisting devices are designed above the drilling tool to prevent an upper-portion drilling tool from rotating when the drill bit cutting the ice layer, and meanwhile the reverse-twisting devices are supported on the hole wall, so that stable drilling of the drilling tool under a small inclination is ensured.

Description

technical field [0001] The invention relates to a drilling method and device for hot water coring in polar ice. Background technique [0002] The Antarctic is covered by ice and snow all the year round, which contains a wealth of paleoclimate and paleontological information. In the past 60 years, a large number of drilling and coring work has been carried out in the Arctic and Antarctic regions internationally, and a large number of ice cores have been obtained, and remarkable results have been achieved. . However, with the deepening of research, scholars at home and abroad are currently focusing on the bottom of the ice sheet, the material balance at the ice-rock interface, and the refreezing process at the bottom of the ice sheet. These are urgently needed to obtain samples of the ice-rock interface for analysis. At present, the commonly used deep drilling and coring method is deep ice core drilling technology. However, due to the heavy workload and long drilling cycle of...

AI Technical Summary

Problems solved by technology

At present, the commonly used deep drilling and coring method is deep ice core drilling technology. However, due to the heavy workload and long drilling cycle of ice core drilling, it often takes several years or even more than ten years to complete an ice hole drilling, which cannot meet the needs of scientists. There is an increasing demand for scientific research, so it is urgent to develop a method to quickly drill to the target ice layer and complete sampling

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