An adaptive cutting tooth and PDC drill bit

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By designing adaptive cutting teeth and utilizing elastic elements and tilted diamond composite sheets, the cutting teeth can adaptively adjust their density in different formations, solving the problem of low impact resistance of diamond composite sheets in existing technologies and improving cutting efficiency and drill bit life.

CN224532644UActive Publication Date: 2026-07-21KINGDREAM PLC CO +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: KINGDREAM PLC CO
Filing Date: 2025-09-26
Publication Date: 2026-07-21

AI Technical Summary

Technical Problem

The existing diamond composite sheet is brazed and fixed to the drill bit, and the cutting teeth are fixed in position along the normal direction of the drill bit outline. This results in the drill bit tooth density remaining unchanged when drilling into different formations, and the diamond composite sheet has low impact resistance.

Method used

An adaptive cutting tooth is designed by setting an elastic element at the bottom of the base and installing a diamond composite sheet at the top of the base, with its axis tilted. Combined with a sleeve and a limiting structure, the position of the cutting tooth changes along the normal direction of the drill bit profile as the formation changes, adapting to the cutting needs of soft and hard formations.

Benefits of technology

It improves cutting efficiency and drill bit life by reducing tooth density in soft formations and increasing tooth density in hard formations, thereby reducing the stress on a single tooth and enhancing impact resistance.

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Abstract

The application relates to an adaptive cutting tooth and a PDC drill bit, the adaptive cutting tooth comprising a base, a resilient element being connected to the bottom of the base, a diamond compact being mounted on the top of the base, and the axis of the diamond compact being obliquely arranged with the axis of the base. By arranging the resilient element on the bottom of the base and mounting the diamond compact on the top of the base, the adaptive cutting tooth can change along the normal direction of the drill bit contour line according to the change of the stratum, the tooth distribution density on the drill bit contour line can change in different strata, and the technical problem that in the prior art, the diamond compact is fixed on the drill bit by brazing, the position of the cutting tooth along the normal direction of the drill bit contour line is fixed, the tooth distribution density of the drill bit does not change in different strata during drilling, and the impact resistance of the diamond compact is low is solved.

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