PDC drill bit with stable tool face for directional drilling

Abstract

The invention relates to the technical field of PDC drill bits, in particular to a PDC drill bit with a stable tool face for directional drilling. The drill bit can effectively prevent a drilling direction from deviating, is provided with the stable tool face, and comprises a drill bit base body, a drill handle is arranged at the top end of the drill bit base body, first hard layers are arranged on the surfaces of the bottom end and the side face of the drill bit base body, several first blades are evenly arranged at the bottom end and the side face of the drill bit base body, a positioning drill is arranged in the middle of the bottom end of the drill bit base body and comprises a positioning drill base body and several second blades, each second blade is arranged between the bottom end and the side face of the positioning drill base body, a second hard layer is arranged on the surface of each positioning drill base body, several chip grooves are formed in the bottom end of each first blade, each chip groove is in an arc shape, and the radius of each chip groove away from the middle of the drill bit base body is larger than that of the chip groove close to the middle of the drill bit base body.

Description

technical field [0001] The invention relates to the technical field of PDC drill bits, in particular to a PDC drill bit for directional drilling with a stable tool face. Background technique [0002] As we all know, PDC drill bit (polycrystalline diamond compact drill bit) is the most commonly used drilling tool in oil drilling engineering. With the continuous advancement of cutting tooth material technology and bit design technology, its unique drilling safety, structural flexibility and efficient cutting performance for shearing and breaking rock make the PDC bit more suitable for formation in oil and gas drilling engineering. According to statistics, most of the total drilling footage in the world is completed by PDC bits, which occupies an absolutely important position. [0003] But today's PDC drill bit finds in use, when the PDC drill bit used in directional drilling is in use today, the drilling depth of the PDC drill bit is longer, and the stability of its PDC drill...

AI Technical Summary

Problems solved by technology

[0003] But today's PDC drill bit finds in use, when the PDC drill bit used in directional drilling is in use today, the drilling depth of the PDC drill bit is longer, and the stability of its PDC drill bit when drilling is then poorer, and the PDC drill bit is in use. The greater the shaking during drilling, it is easy to cause a small deviation in the drilling direction of the PDC bit, but only this small deviation, often after the drilling distance is too long, the deviation will become larger and larger, and eventually Causes a large deviation in the drilling direction of the PDC bit

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