Patent · US Active

Fixed cutter drill bit for abrasive applications

US9145739B2 · kind B2 · utility

5Cited by

34References

42Claims

0Family size

Assignee

SMITH INTERNATIONAL, INC. · US

Inventors

Carl M. Hoffmaster · Houston, US
Shelton W. Alsup · Houston, US
Michael G. Azar · Diemelstraße, US
Thomas W. Oldham · Diemelstraße, US
Stuart Oliver · Magnolia, US
Sidney J. Isnor · Calgary, CA

Key dates

Filing date	Aug 2, 2011
Grant date	Sep 29, 2015
Priority date	—
Expiry date	Aug 2, 2031

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B17/1092
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A cutting tool includes a tool body having a longitudinal axis and a cutting face, a plurality of blades spaced azimuthally about the cutting face and extending at least laterally through a gage region, and a plurality of cutters disposed along the blades. At least two different types of back reaming elements may be disposed on a transitional surface between the gage region of at least one blade and a connection end of the cutting tool. Alternatively, at least one back reaming element may be disposed on a transitional surface between the gage region of at least one blade and a connection end of the cutting tool, and a wear resistant material provided on or in the transitional surface.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.