Richard Mcclellan

US Patent:

7814998, Oct 19, 2010

Filed:

Dec 17, 2007

Appl. No.:

11/958082

Inventors:

Suresh G. Patel - The Woodlands TX, US
Mathews George - Houston TX, US
Richard J. McClellan - The Woodlands TX, US
Paul E. Pastusek - Houston TX, US
Innocent R. Rugashoborola - Houston TX, US
Nicholas J. Lyons - Houston TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 10/46

US Classification:

175432, 175434

Abstract:

A cutting element for use in drilling subterranean formations. The cutting element includes a superabrasive table mounted to a supporting substrate. The superabrasive table includes a two-dimensional cutting face having a cutting edge along at least a portion of its periphery, and a surface comprising a chamfer extending forwardly and inwardly from proximate a peripheral cutting edge at a first acute angle of orientation of greater than about 45 with respect to the longitudinal axis of the cutting element, and to no greater than a selected depth. The chamfer may be arcuate or planar, and of a dimension sufficient to ensure that a wear flat generated during use of the cutting element remains outside the inner boundary of the chamfer within the chamfer envelope, and small enough to maintain aggressive cutting characteristics for the cutter. Drill bits and drilling tools bearing the cutting elements are also disclosed.