مخروط التفريز - أداة عالية الكفاءة لعمليات فتح النوافذ وإصلاح النوافذ
Product Technical Introduction
إن مخروط الطحن is a specialized downhole milling tool designed for casing window opening and window repair operations in oil and gas drilling. Featuring an extended overall length and a multi-functional structural design, the milling cone enables continuous and stable milling while maintaining precise control of window geometry.
During window milling operations, the milling cone performs progressive cutting, enlargement, and finishing of the window, ensuring smooth transitions and accurate window dimensions. Its design allows multiple milling functions to be completed in a single run, improving operational efficiency and reducing trip time.
Working Principle & Milling Process
The milling cone operates through a stage-by-stage milling process as the drill string advances:
At the initial stage, the cone head engages the casing and performs the primary milling function, forming the upper window section. As milling continues and the profile transitions into a cylindrical shape, the lower window section is gradually formed.
With further advancement of the drill string, the transition section enlarges and refines the window profile, ensuring smooth geometry and proper alignment. Finally, the diameter-retaining section continuously grinds and trims the window, maintaining a consistent window size and improving surface quality.
This progressive milling mechanism ensures effective material removal, stable tool operation, and high-quality window formation.
Structural Design & Engineering Features
The milling cone is designed with a long-body structure, allowing extended contact time with the casing and improving milling stability during window operations. The tool integrates multiple functional sections into one body, enabling cutting, shaping, and finishing within a single tool assembly.
Key engineering features include:
- Extended length for stable window milling
- Cone head for initial window cutting
- Transition section for window enlargement and shaping
- Diameter-retaining section for window finishing and size control
- Optimized structure to reduce vibration and tool jumping
Application Advantages
By combining window opening and window repair capabilities, the milling cone significantly improves operational efficiency in sidetracking and re-entry operations. The tool minimizes uneven window profiles and reduces the need for repeated milling runs, resulting in improved window quality and reduced operational risk.
Materials & Durability
The milling cone is manufactured from high-strength alloy steel and designed to withstand high torque, impact loads, and abrasive conditions commonly encountered during milling operations. Its robust structure ensures long service life and consistent performance in demanding downhole environments.
Typical Applications
- Casing window opening operations
- Window repair and reconditioning
- Sidetracking and re-entry drilling
- Directional and horizontal well preparation
