Deep drilling technology is a kind of advanced technology specially used for machining deep holes, which is widely used in machinery manufacturing and geological exploration. In machining, deep holes usually refer to holes with a ratio of hole depth to aperture greater than 6. Deep drilling technology faces the challenges of heat dissipation and chip removal, poor tool rigidity, etc., and requires pressure cooling systems and special drill bits to overcome these problems.

Deep drilling bits are divided into two types: external chip discharge and internal chip discharge. External chip drill, such as gun drilling, is suitable for processing small diameter deep holes, the cutting fluid enters from the middle of the drill rod, is sprayed to the cutting area through the small hole in the bit head, and then discharged from the outside of the bit with chips. The internal chip drill, such as BTA deep hole drill and jet drill, is suitable for large diameter deep holes, cutting fluid from the drill pipe and hole wall into the gap, the chip from the drill pipe hole, higher production efficiency.

Deep drilling technology is of great significance in industrial production and can meet the needs of high precision and efficient processing.

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