Casing Section Milling System: Precision Window Cutting for Sidetrack Drilling
Revolutionizing Casing Exit Operations
Traditional window milling challenges:
-Premature cutter wear → Multiple trips per window
-Inconsistent window geometry → Stuck BHA risks
-Low ROP → 18-36 hours/window
Our solution delivers:
✅ Single-trip windows in 8-12 hours
✅ Smooth window profiles (dogleg severity <5°/100ft)
✅ Guaranteed milling length: 60-100ft per cutter set
Core Technology Breakthroughs
Diamond-Enhanced Cutters
Feature | Benefit |
Industrial Diamond Grit | 8-12x wear resistance vs. tungsten carbide |
Vacuum Brazing | 360° particle encapsulation, zero delamination |
Optimized Geometry | Aggressive cutting with 30% lower weight-on-bit |
Patented Stabilization System
-Dual-Action Anchor: Eliminates axial vibration during milling
-Flow-Enhanced Chip Removal: Prevents balling up in gummy formations
Operational Advantages
✅ Unmatched Efficiency
Cut 9-5/8" casing @ 12-18 ft/hr (industry avg: 6-10 ft/hr)
Complete window in 1 trip (save 24h rig time → $120K/well)
✅ Extended Tool Life
300-400 linear ft milling per cutter set
Replaceable blades reduce tooling costs 60%
✅ Engineered Reliability
Anti-rotation locks prevent junk ring formation
Pressure-balanced for HPHT wells (20,000 psi / 175°C)
Technical Specifications
Parameter | Specification |
Casing Sizes | 7" to 13-3/8" |
Cutting Structure | 6-8 diamond-embedded blades |
Milling Length | Up to 100 ft per run |
Operating Temp | -20°C to 200°C |
Connection | 6-5/8" REG, 7-5/8" REG (API Spec 7-1) |
Hydraulics | 250-550 GPM flow rate optimized |
Field-Proven Applications
Deepwater Sidetracks: Single-trip exits in 10,000ft MD
Shale Multi-Laterals: 4+ windows per BHA run
Salt Dome Re-entries: Milling through corroded casings
Geothermal Wells: High-temp milling in granite formations
