Downhole cutting tool having center beveled mill blade

US8327957B2 · kind B2 · utility

Assignee

• Baker Hughes Holdings LLC · US

Inventors

• Calvin J. Stowe, II · Bellaire, US
• Andrew D. Ponder · Houston, US

Key dates

• Filing date: Jun 24, 2010
• Grant date: Dec 11, 2012
• Expiry date: Jun 1, 2031

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B10/43
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Downhole cutting tools such as blade mills comprise a body having a first end for connection with a rotating component of a drill string and a cutting end for rotation in unison with the body. The cutting end comprises at least two blades, each of the at least two blades comprising a front sidewall surface, a back sidewall surface, an inner end, an outer end, and at least one beveled portion disposed along the front sidewall surface toward the inner end of each of the at least two blades. At least one of the beveled portions comprise at least one cutting element disposed thereon that is disposed across a center point of the face of the cutting end to provide for cutting away an object disposed in a wellbore to occur across a center point of the cutting end.