Single-wall externally supplied flow-tight coring drill

Abstract

This utility model discloses a single-walled, externally supplied, sealed coring drill bit, comprising a horizontally arranged gas sampling tube and a slanted core drill bit. The left end of the gas sampling tube has a first female thread, and the right end has a first male thread. The left end of the slanted core drill bit has a second female thread, and the slanted core drill bit is installed at the right end of the gas sampling tube. A high-low pressure switching valve is installed inside the gas sampling tube, located to the right of the first female thread. The right end of the high-low pressure switching valve connects to the left end of a push rod assembly, and the right end of the push rod assembly connects to a ball core assembly. A connecting cavity is provided inside the high-low pressure switching valve, connecting to a supply channel. This application significantly reduces the overall weight of the device, simplifies the coring structure, and solves the technical problems of existing sealed sampling devices being unable to achieve slag removal and cooling.

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