Removable micro-reaming PDC bit and method
By designing a detachable micro-reaming PDC drill bit, the problems of existing drill bits being unable to flexibly enlarge diameter and needing to be replaced entirely after wear are solved, achieving flexible combination and simplified processing, and reducing drilling costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CNPC GREATWALL DRILLING COMPANY
- Filing Date
- 2025-01-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing micro-reamers are one-piece structures, which cannot flexibly meet different reaming requirements. Furthermore, once a part of the drill bit wears out, the entire drill bit needs to be replaced, increasing drilling costs and manufacturing difficulties.
Design a detachable micro-reamer PDC drill bit, including a fixed cutter blade and a detachable cutter blade. The detachable structure enables the replacement of cutter blades with different reamer diameters and grinding. The detachable block and bolt connection simplify the operation.
It enables the combination of different sizes of enlarged holes according to needs, reduces drilling costs, simplifies drill bit processing, and facilitates the replacement and repair of worn cutter wings.
Smart Images
Figure CN122407077A_ABST