TEL:+86 19521653487
EMAIL:shawn.zhu@petrogears-global.com

Milling Cone: Precision Window Cutting and Repair Solution

publish:2025-10-27 14:08:21   views :18
publish:2025-10-27 14:08:21  
18

Milling Cone: Precision Window Cutting and Repair Solution



The Window Milling Challenge

Traditional window milling operations face:

-Multiple tool requirements for different milling phases

-Poor window quality requiring additional reaming passes

-Short tool life in abrasive casing materials

-Inconsistent window geometry affecting subsequent operations

Our milling cone delivers:

✅ Single-trip window completion with integrated cutting phases

✅ Superior window quality with smooth, precise geometry

✅ Extended service life through advanced material technology

✅ Consistent performance across various casing grades

Progressive Milling Technology

Three-Phase Cutting Action

Milling Phase

Cutting Section

Function

Result

Initial Cutting

Cone Head

Creates upper window

Pilot opening established

Window Formation

Cylindrical Section

Develops full window

Complete casing penetration

Finishing & Dressing

Transition & Gauge

Smooths and enlarges

Precision window geometry

Technical Specifications

Parameter

Specification

Size Range

4-3/4" to 13-3/8" OD

Body Length

Extended design for stability

Cutting Structure

Tungsten carbide inserts

Gauge Protection

Hardfaced wear pads

Connections

API REG, IF, FH

Materials

4145HM with specialized heat treatment

Compliance

API Spec 7-1, ISO 9001:2015

Working Principle & Advantages

-Integrated Milling Process

Phase 1: Initial Penetration

Cone head initiates contact with casing

Progressive cutting establishes pilot window

Controlled penetration prevents tool damage

Phase 2: Window Development

Cylindrical section expands initial opening

Full circumference cutting completes penetration

Chip management through optimized flute design

Phase 3: Finishing Operations

Transition zone enlarges and smoothes window

Gauge section maintains window diameter

Final dressing ensures clean edges

-Operational Benefits

✅ Single-Trip Efficiency

Complete window in one run vs. multiple tools

Save 12-18 hours of rig time per window

✅ Superior Window Quality

Smooth window profile reduces drag

Optimal geometry for tool passage

Minimal burrs or sharp edges

✅ Extended Tool Life

Advanced carbide technology provides 3x longer life

Even wear distribution across all sections

Field-replaceable components for cost efficiency

Field Applications

Sidetrack Operations: Create precise windows for directional drilling

Window Repair: Restore damaged or irregular window profiles

Multi-Lateral Wells: Multiple window creation in single casing string

Casing Exit: Reliable initiation points for wellbore departures

Shanghai Petrogears Co., Ltd

©Shanghai Petrogears Co., Ltd

Building 16, No.2999, Hutai Road, Baoshan District, Shanghai, China

Phone:+86 19521653487

WhatsApp:+1 7654215961 

Copyright © 2024 Shanghai Petrogears Co., Ltd. All rights reserved

Email

General manager:shawn.zhu@petrogears-global.com

Sales mangager:zak.sales@petrogears-global.com

Sales manager:minachen@petrogears-global.com

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