Polar ice lower bed rock hot water core-drilling method and device

Abstract

The invention discloses a hot water core drilling method and device for bedrock under polar ice. The device includes a hot water pipe, a cable, a cable terminal, a bottom detection mechanism, a water diversion joint, an anti-twist device, an electrical cabin, and cuttings Tube, screw motor, lower double-tube drilling tool and drill bit; the method is to use hot water as the power medium to drive the bottom hole drilling tool to rotate and complete bedrock core drilling. The hot water is transported to the bottom hole drilling tool by pipeline, and The cable supplies power to the sensors and communication modules in the drilling tool, and realizes the surface monitoring of the drilling parameters in the hole; the rock drilling bit drills down through rotary grinding, and at the same time, the cuttings generated by drilling are carried away from the hole by hot water bottom, and return along the annular gap between the drilling tool and the hole wall; the present invention solves the technical problem of rapid core drilling in polar subglacial bedrock. rock interface, and replace bedrock hot water core drilling tools to complete core sampling drilling.

Description

technical field [0001] The invention relates to a hot water coring drilling method and device for bedrock under polar ice. Background technique [0002] The Antarctic continent is one of the oldest continents on the earth. It not only preserves a variety of ancient craton land masses, it is an ideal place to explore the early evolution of the earth, and its scientific significance is very prominent. Obtaining bedrock cores under the ice sheet and in-depth analysis can infer the formation and evolution process of the crust, the historical process of continental collision and extrusion, plate tectonic theory, etc., so as to understand the geological structure history of the Antarctic inland and study the Antarctic ice layer Freeze-thaw, slip and deformation rates, as well as glacier dynamics and climate change are of great significance. [0003] At present, no country has successfully drilled subglacial sedimentary rock samples in the Antarctic interior. Due to the extremely...

AI Technical Summary

Problems solved by technology

Due to the extremely low temperature on the polar surface and glaciers, difficult transportation, poor supplies, bad weather, complex stratum environment and other unfavorable conditions, it has brought great difficulty to the drilling work

However,

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