Composite rock-breaking diamond drill bit

By combining rolling and scraping rock breaking methods on the drill bit to form breaking grooves and assist scraping, the problem of rapid failure of the drill bit in high-hardness strata is solved, and the rock breaking efficiency and service life are improved.

CN116733380BActive Publication Date: 2026-07-24SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Filing Date
2023-07-17
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing drill bits suffer from rapid failure and low rock-breaking efficiency due to wear of the cutting teeth under drilling conditions with high abrasiveness and hardness.

Method used

The composite rock-breaking diamond drill bit combines two rock-breaking methods: rolling and scraping. The rolling unit forms a crushing groove by rolling the rock, while the scraping unit assists in crushing the rock, reducing friction and wear.

Benefits of technology

It improves the rock-breaking efficiency of drill bits, extends their service life, and enhances their adaptability to complex formations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a composite rock-breaking diamond drill bit, and particularly comprises a drill bit body and a blade extending from the drill bit body, and a cutting tooth is fixedly arranged on the blade; the cutting tooth is at least one rolling scraping tooth; the rolling scraping tooth is composed of a scraping unit and a rolling unit; the rolling unit is arranged on the scraping unit in a rotary connection mode; the rolling unit and the scraping unit form a combined rock-breaking mode of rolling and scraping on rocks; and the scraping unit is fixed on the blade. The application can solve the problems of rapid failure of the drill bit and low rock-breaking efficiency caused by the abrasion of the cutting tooth edge when the drill bit drills into a stratum with strong abrasiveness and high hardness, so as to slow down the abrasion of the cutting tooth, prolong the service life of the drill bit, and improve the rock-breaking efficiency of the PDC tooth.
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Citation Information

Patent Citations

  • CN108868623A

  • CN215169749U

  • CN216894254U

  • US20140326515A1