Apparatus and methods of milling a restricted casing shoe

US8146682B2 · kind B2 · utility

Assignee

• Weatherford/Lamb, Inc. · US

Inventors

• Bill Rhinehart · Diemelstraße, US
• Thomas M. Redlinger · Houston, US
• Thurman B. Carter · Spring, US
• Wei Jake Xu · Cypress, US
• Hubert E. Halford · Rosharon, US
• Martin Alfred Stulberg · Angleton, US

Key dates

• Filing date: Apr 4, 2008
• Grant date: Apr 3, 2012
• Expiry date: Nov 6, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/78
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A method of removing a restriction in a tubular located in a well includes providing a drilling assembly with a drill bit and a reamer, the reamer having a cutting structure for removing the restriction; drilling through a lower portion of the tubular; expanding the reamer at a location below the restriction; and urging the reamer back toward the restriction to remove the restriction.