Shoe for downhole milling
By combining modular milling blocks with high-pressure pulsed water jets, the problems of traditional milling shoes being unable to handle multiple obstacles and having slow chip removal speed in complex downhole environments are solved, thus achieving efficient downhole milling operations.
CN224413581UActive Publication Date: 2026-06-26DAQING NAIGU PETROLEUM MASCH EQUIP MFG CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DAQING NAIGU PETROLEUM MASCH EQUIP MFG CO LTD
- Filing Date
- 2025-09-07
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
Traditional grinding shoes struggle to handle various obstacles in complex downhole environments and have slow chip removal speeds, impacting grinding efficiency and cost.
Method used
The design incorporates a detachable milling mechanism and a high-pressure pulse chip removal system, enabling efficient milling and rapid chip removal of obstacles made of different materials through modular milling blocks and high-pressure water jets.
Benefits of technology
It improves milling efficiency, reduces the time and cost of frequent shoe replacements, and ensures efficient downhole operations.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224413581U_ABST
Abstract
The utility model belongs to the field of milling technology especially relates to the mill shoe for downhole milling, including connecting cylinder, the bottom fixed mounting of connecting cylinder has mill shoe fixed body, the outer fixed surface of mill shoe fixed body is installed with detachable mill mechanism, the inner fixed surface of connecting cylinder is installed with chip removal mechanism, the detachable mill mechanism includes mill block, the back fixed surface of mill block is installed with positioning rod, the outer surface of positioning rod and the inner surface of connecting cylinder are jointed. The mill shoe for downhole milling, through first opening rubber cap, taking out bolt, makes mill block from mill shoe fixed body, then carries mill block of different material mill ball with bolt installation to mill shoe fixed body, then motor drives eccentric wheel to rotate through rotating shaft, eccentric wheel drives sliding rod to move up and down through connecting rod, sliding rod drives slider to move up and down in compression pipe, and compresses the water in compression pipe.
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