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Non-Welded and interchangeable Pilot Milling Tool

IP.com Disclosure Number: IPCOM000239603D
Publication Date: 2014-Nov-18
Document File: 2 page(s) / 109K

Publishing Venue

The IP.com Prior Art Database

Abstract

The abstract of this invention is to have interchangeable Mill/Stabilizer Heads which avoids welding Blades/Stabilizers to a Pilot Mill Body. The Mill Heads will either be casted or machined as a separate part of the tool. Due to excessive heat on standard Pilot Mill, heat cracks are created and there is a limit redress window. This invention will also eliminate any welding inconsistencies which would allow the Blades/Inserts to be dressed at an incorrect orientation or angle that would not produce the desirable metal chip from the tubing/casing being milled and removing them from the well. The Milling/Stabilizer Head and the Mandrel will have matching Hex's/Spline to generate torque from the Blades when milling through the Mandrel and Top Sub back through the BHA. The Hex/Spline will also prevent any vibration from the milling process. The Standard Pilot Mill (See Attachment) which is being used today has the dressed Blades dressed and Stabilizer Blades welded to the Body. In this invention (See attachment "Pilot Mill for patent application") the Blade/Stabilizer Head is manufactured into one part. The Blades will be set in a uniform pattern with designed steps/dimples that would place the inserts (cutting structure) at the precise and proper position that would maximize the life of the cutting structure and create the proper metal chip for removal from the well. The existing Pilot Mill leaves too much of a window for human error and inconsistencies with the design of the mill today. This invention would create a portable Mill/Stabilizer Head that is disregarded after usage. Multi Head sizes can be used with a standard Top Sub and Mandrel for various tubing/casing weight and sizes.

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Non-Welded and interchangeable Pilot Milling Tool

The abstract of this invention is to have interchangeable Mill/Stabilizer Heads which avoids welding Blades/Stabilizers to a Pilot Mill Body. The Mill Heads will either be casted or machined as a separate part of the tool. Due to excessive heat on standard Pilot Mill, heat cracks are created and there is a limit redress window. This invention will also eliminate any welding inconsistencies which would allow the Blades/Inserts to be dressed at an incorrect orientation or angle that would not produce the desirable metal chip from the tubing/casing being milled and removing them from the well. The Milling/Stabilizer Head and the Mandrel will have matching Hex's/Spline to generate torque from the Blades when milling through the Mandrel and Top Sub back through the BHA. The Hex/Spline will also prevent any vibration from the milling process.

The Standard Pilot Mill (See Attachment) which is being used today has the dressed Blades dressed and Stabilizer Blades welded to the Body. In this invention (See attachment "Pilot Mill for patent application") the Blade/Stabilizer Head is manufactured into one part. The Blades will be set in a uniform pattern with designed steps/dimples that would place the inserts (cutting structure) at the precise and proper position that would maximize the life of the cutting structure and create the proper metal chip for removal from the well. The existing Pilot Mill leaves too much of a window for human...