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Class Information
Number: 175/374
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Specific or diverse material
Description: Apparatus in which the bit or any portion thereof is composed of (1) two or more different materials, (2) a single material which has been treated to provide portions of the bit with specific properties which properties are different from the properties of another portion or (3) a specific material.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7624823 |
Roller cone drill bits with optimized cutting zones, load zones, stress zones and wear zones for increased drilling life and methods |
Dec. 1, 2009 |
| 7621347 |
Bit leg and cone hardfacing for earth-boring bit |
Nov. 24, 2009 |
| 7600589 |
Rotary drill bits |
Oct. 13, 2009 |
| 7597159 |
Drill bits and drilling tools including abrasive wear-resistant materials |
Oct. 6, 2009 |
| 7565928 |
Downhole abrading tool having a taggant injection assembly for indicating excessive wear |
Jul. 28, 2009 |
| 7552783 |
Graded hardfacing for drill bits |
Jun. 30, 2009 |
| 7540340 |
Cutting element having enhanced cutting geometry |
Jun. 2, 2009 |
| 7523794 |
Wear resistant assembly |
Apr. 28, 2009 |
| 7510034 |
System, method, and apparatus for enhancing the durability of earth-boring bits with carbide materials |
Mar. 31, 2009 |
| 7506705 |
Method of producing downhole drill bits with integral carbide studs |
Mar. 24, 2009 |
| 7497280 |
Abrasive-impregnated cutting structure having anisotropic wear resistance and drag bit including same |
Mar. 3, 2009 |
| 7497281 |
Roller cone drill bits with enhanced cutting elements and cutting structures |
Mar. 3, 2009 |
| 7493973 |
Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance |
Feb. 24, 2009 |
| 7484577 |
Bit leg outer surface hardfacing on earth-boring bit |
Feb. 3, 2009 |
| 7475743 |
High-strength, high-toughness matrix bit bodies |
Jan. 13, 2009 |
| 7475744 |
Superabrasive inserts including an arcuate peripheral surface |
Jan. 13, 2009 |
| 7472764 |
Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture |
Jan. 6, 2009 |
| 7451838 |
High energy cutting elements and bits incorporating the same |
Nov. 18, 2008 |
| 7441610 |
Ultrahard composite constructions |
Oct. 28, 2008 |
| 7416035 |
Shaped inserts with increased retention force |
Aug. 26, 2008 |
| 7407525 |
Fracture and wear resistant compounds and down hole cutting tools |
Aug. 5, 2008 |
| 7398840 |
Matrix drill bits and method of manufacture |
Jul. 15, 2008 |
| 7377332 |
Multiple inserts of different geometry in a single row of a bit |
May. 27, 2008 |
| 7377340 |
Drill bit cutting elements with selectively positioned wear resistant surface |
May. 27, 2008 |
| 7377341 |
Thermally stable ultra-hard material compact construction |
May. 27, 2008 |
| 7373997 |
Layered hardfacing, durable hardfacing for drill bits |
May. 20, 2008 |
| 7368079 |
Method for forming ultra hard sintered compacts using metallic peripheral structures in the sintering cell |
May. 6, 2008 |
| 7350601 |
Cutting elements formed from ultra hard materials having an enhanced construction |
Apr. 1, 2008 |
| 7350600 |
Shirttails for reducing damaging effects of cuttings |
Apr. 1, 2008 |
| 7350599 |
Impregnated diamond cutting structures |
Apr. 1, 2008 |
| 7343990 |
Rotary rock bit with hardfacing to reduce cone erosion |
Mar. 18, 2008 |
| 7341119 |
Hydro-lifter rock bit with PDC inserts |
Mar. 11, 2008 |
| 7334652 |
Roller cone drill bits with enhanced cutting elements and cutting structures |
Feb. 26, 2008 |
| 7303030 |
Barrier coated granules for improved hardfacing material |
Dec. 4, 2007 |
| 7267186 |
Magnetic face seal for rock drill bit bearings |
Sep. 11, 2007 |
| 7258177 |
Fracture and wear resistant compounds and rock bits |
Aug. 21, 2007 |
| 7250069 |
High-strength, high-toughness matrix bit bodies |
Jul. 31, 2007 |
| 7240746 |
Bit gage hardfacing |
Jul. 10, 2007 |
| 7195078 |
Multiple inserts of different geometry in a single row of a bit |
Mar. 27, 2007 |
| 7195086 |
Anti-tracking earth boring bit with selected varied pitch for overbreak optimization and vibration reduction |
Mar. 27, 2007 |
| 7182162 |
Shirttails for reducing damaging effects of cuttings |
Feb. 27, 2007 |
| 7124842 |
Cutting elements of gage row and first inner row of a drill bit |
Oct. 24, 2006 |
| 7100712 |
Method for hardfacing roller cone drill bit legs |
Sep. 5, 2006 |
| 7086488 |
Cutting element having enhanced cutting geometry |
Aug. 8, 2006 |
| 7040424 |
Drill bit and cutter having insert clusters and method of manufacture |
May. 9, 2006 |
| 7036614 |
Fracture and wear resistant compounds and rock bits |
May. 2, 2006 |
| 7032693 |
Preformed tooth for tooth bit |
Apr. 25, 2006 |
| 7017677 |
Coarse carbide substrate cutting elements and method of forming the same |
Mar. 28, 2006 |
| 7011170 |
Increased projection for compacts of a rolling cone drill bit |
Mar. 14, 2006 |
| 7004267 |
Drill bit cone protector |
Feb. 28, 2006 |
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