Drill with open water hole

Abstract

The invention discloses a drill with an open water hole and belongs to the technical field of drilling. The drill comprises a drill body, cutting structures, cutting teeth, chip grooves, an inner flow passage and the water hole, wherein the cutting structures are arranged on the drill body; the cutting teeth are formed in the cutting structures; the inner flow passage is arranged in the drill body; the chip grooves are formed between the cutting structures; the water hole is formed between the inner flow passage and the chip grooves, and the inner flow passage and the chip grooves are communicated via the water hole; only one water hole is provided, and the water hole is big in opening and small in bottom on the whole; the opening in the bottom of the water hole is directly communicated with the opening in the top of the inner flow passage; the area of the opening in the bottom of the water hole is consistent with or substantially equal to the opening in the top of the inner flow passage. In order to solve the problems that a conventional drill is shortened in service life and decreased in drilling performance due to unreasonable structure of a drill hydraulic structure in the rapid drilling and high-temperature drilling processes, the invention particularly provides the drill with the open water hole.

Description

technical field [0001] The invention belongs to the technical field of drilling. Background technique [0002] The drill bit is the main tool used to break the rock to form the wellbore in drilling engineering. The hydraulic structure of the drill bit is an important factor determining the drilling performance. When the drill bit breaks rock and drills, the drilling fluid is sprayed from the inner flow channel of the drill bit to the bottom of the well through the water hole of the drill bit to clean the bottom of the well, carry and transport the cuttings formed by the broken rock of the drill bit, cool and clean the cutting teeth and assist The role of rock breaking. In modern rapid drilling technology, the drill bit should not only have excellent rock breaking structure, but also have good hydraulic performance. Most of the water holes used in conventional drill bits are small circular holes, and they are all arranged in multiples. The overflowing flow formed by the dri...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a drill bit with an open water hole in order to solve the problem of reducing the service life and drilling performance of the drill bit due to the unreasonable hydraulic structure of the drill bit in the process of fast drilling and high temperature drilling.

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