Patent Number: 6,253,862

Title: Earth-boring bit with cutter spear point hardfacing

Abstract: An earth-boring bit has rolling cutters, each attached to a bit leg depending from a bit body. Each of the cutters has hardfaced, milled teeth. A spear point is located on one of the cutters. The spear point has a neck that protrudes toward the axis of the bit from a conical portion of the cutter. Blades are located on the spear point with spaces located between the blades. A layer of hardfacing is applied to the entire spear point area including the blades, the spaces and the neck.

Inventors: Overstreet; James L. (Webster, TX), Jones; Ronald L. (Cleveland, TX), Massey; Alan J. (Houston, TX), McAninch; Trevor M. (Willis, TX), Morgan; Jeremy K. (Conroe, TX)

Assignee: Baker Hughes Incorporated

International Classification: E21B 10/46 (20060101); E21B 10/16 (20060101); E21B 10/50 (20060101); E21B 10/08 (20060101); B23K 35/32 (20060101); B23K 35/24 (20060101); E21B 010/00 ()

Expiration Date: 07/03/2018