PDC drill bit applicable to core drilling of moon

Abstract

The invention discloses a PDC drill bit applicable to core drilling of the moon and belongs to the field of drilling tools for geological exploration of the moon. The PDC drill bit comprises a drill bit matrix, PDC cutting teeth and spiral rock debris channels, wherein the PDC cutting teeth are symmetrically inlaid and welded at the front of the drill bit matrix, the spiral rock debris channels are two spiral grooves which ascend spirally along the peripheral wall of the drill bit matrix and are correspondingly fixedly connected with the peripheral wall, lower ports of the two spiral grooves are correspondingly connected with the PDC cutting teeth, and upper ports are rock debris discharge ports. When the PDC drill bit is adopted to drill to break rock, on one hand, the rock debris produced through rock breakage ascends gradually along with the spiral grooves and is discharged out of holes smoothly, and the moon core drilling efficiency is increased; on the other hand, along with smooth discharge of the rock debris, heat generated at the bottom of drilled holes is released and emitted, the failure rate of the drill bit is reduced remarkably, the service life of the drill bit is prolonged, accordingly, the moon core drilling efficiency is increased comprehensively, and the PDC drill bit is not limited by specifications.

Description

technical field [0001] The invention is a PDC drill bit suitable for lunar drilling and coring, and belongs to the field of lunar geological exploration drilling tools. Background technique [0002] At present, the lunar drilling core bits used at home and abroad use the method of inserting and welding cemented carbide, and use cemented carbide as cutting teeth to break rocks. The biggest disadvantage of this method is that the cutting efficiency is low and the cuttings are difficult to discharge. The main performance is Due to the shape, the cemented carbide cannot be connected with the spiral groove correspondingly, and it is difficult for cuttings to be removed from the hole through the spiral groove, and when the cemented carbide is used as a cutting tooth, the cutting efficiency is low when encountering rocks above grade 6, which increases the working time. It is in an extreme environment of no water, high vacuum, microgravity, and large temperature difference between d...

AI Technical Summary

Problems solved by technology

[0002] At present, the lunar drilling core bits used at home and abroad use the method of inserting and welding cemented carbide, and use cemented carbide as cutting teeth to break rocks. The biggest disadvantage of this method is that the cutting efficiency is low and the cuttings are difficult to discharge. The main performance is Due to the shape, the cemented carbide cannot be connected with the spiral groove correspondingly, and it is difficult for cuttings to be removed from the hole through the spiral groove, and when the cemented carbide is used as a cutting tooth, the cutting efficiency is low when encountering rocks above grade 6, which increases the working time. It is in an extreme environment of no water, high vacuum, microgravity, and large temperature difference between day and night. Long hours of work and difficulties in cuttings discharge will increase drilling failures and increase risks.

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