| Patent application number | Description | Published |
|---|
| 20100006343 | EARTH-BORING TOOLS HAVING FEATURES FOR AFFECTING CUTTINGS FLOW AND METHODS OF FORMING THE SAME - An earth-boring bit has a bit body having a plurality of bit legs extending longitudinally therefrom, each bit leg comprising one or more groove regions formed along a laterally outer surface thereof. Each groove region comprises a fluid course for drilling fluid and cuttings to pass across the outer surface. A ridge may be disposed adjacent a lower edge of one or more of the groove regions. Each groove region may also be positioned at differing heights on the bit legs. Methods of forming earth-boring bits are also disclosed. | 01-14-2010 |
| 20100038146 | Bit Cone With Hardfaced Nose - A drill bit for drilling a wellbore, the drill bit having a cutter which has tungsten carbide inserts and a spear point. The spear point has a neck that joins a smooth portion of the cutter and blades that extend from the neck and converge to an apex. The blades define valleys or spaces between them. A layer of hardfacing is applied to the entire spear point including the interim spaces and the neck. | 02-18-2010 |
| 20100071963 | Staggered Compact Row on Same Land - An earth boring drill bit comprising cones, each cone having a land on its mid portion with at least two rows of compacts that are staggered with respect to adjacent compacts on another row. The compacts of these two rows may also have the same size. The compacts of these two inner rows are closer to each other than to any other compacts on the cone. | 03-25-2010 |
| 20110031029 | CUTTING ELEMENT PLACEMENT ON A FIXED CUTTER DRILL BIT TO REDUCE DIAMOND TABLE FRACTURE - A rotary drag bit includes a primary cutter row comprising at least one primary cutter mounted on a blade, at least some cutters in the primary cutter row having a portion of a cutting surface thereof covered by a portion of the blade. A backup cutter row comprising at least one cutter may also be included, and at least a portion of a cutting surface of at least some cutters in the backup cutter row is covered by a portion of the blade. Enhanced support for cutters is provided against impact loading. | 02-10-2011 |
| 20110126674 | METHODS OF FORMING EARTH-BORING TOOLS HAVING FEATURES FOR AFFECTING CUTTINGS FLOW - Methods of forming earth-boring tools include assembling a plurality of head sections about a longitudinal axis to form a bit body, rotatably mounting a cutter to the cutter bearing shaft of each head section, and forming at least one groove on an outer surface of a bit leg of at least one head section, causing the at least one groove to extend along a curved path from a leading side of the bit leg to a trailing side of the bit leg between an upper sidewall and a lower sidewall. | 06-02-2011 |
| 20110168452 | Tungsten Carbide Bit with Hardfaced Nose Area - An earth-boring bit has rotatable cones with rows of carbide elements installed thereon. A nose is symmetrically arranged on a cone axis of one of the cones. The nose has a central core that protrudes outward. A base joins supporting metal of the cone. A free end is opposite the base. Teeth are formed on the cone between the base and the free end, the teeth extending radially outward. A hard facing layer is located on the teeth. Intermediate hardfacings extend outward from the core between each of the teeth. The intermediate hardfacings may be lugs and preferably extend the same distance from the core as the teeth. | 07-14-2011 |
