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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 |
| 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 |
| 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 |
| 7377332 |
Multiple inserts of different geometry in a single row of a bit |
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 |
| 7350599 |
Impregnated diamond cutting structures |
Apr. 1, 2008 |
| 7350600 |
Shirttails for reducing damaging effects of cuttings |
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 |
| 6988569 |
Cutting element orientation or geometry for improved drill bits |
Jan. 24, 2006 |
| 6955233 |
Roller cone drill bit legs |
Oct. 18, 2005 |
| 6951578 |
Polycrystalline diamond materials formed from coarse-sized diamond grains |
Oct. 4, 2005 |
| 6942045 |
Drilling with mixed tooth types |
Sep. 13, 2005 |
| 6923276 |
Streamlined mill-toothed cone for earth boring bit |
Aug. 2, 2005 |
| 6915866 |
Polycrystalline diamond with improved abrasion resistance |
Jul. 12, 2005 |
| 6827161 |
Roller cone drill bit having non-axisymmetric cutting elements oriented to optimize drilling performance |
Dec. 7, 2004 |
| 6823951 |
Arcuate-shaped inserts for drill bits |
Nov. 30, 2004 |
| 6808031 |
Drill bit having large diameter PDC cutters |
Oct. 26, 2004 |
| 6782958 |
Hardfacing for milled tooth drill bits |
Aug. 31, 2004 |
| 6772849 |
Protective overlay coating for PDC drill bits |
Aug. 10, 2004 |
| 6766870 |
Mechanically shaped hardfacing cutting/wear structures |
Jul. 27, 2004 |
| 6725952 |
Bowed crests for milled tooth bits |
Apr. 27, 2004 |
| 6688410 |
Hydro-lifter rock bit with PDC inserts |
Feb. 10, 2004 |
| 6659206 |
Hardfacing composition for rock bits |
Dec. 9, 2003 |
| 6655478 |
Fracture and wear resistant rock bits |
Dec. 2, 2003 |
| 6655480 |
Cutting insert for percussion drill bit |
Dec. 2, 2003 |
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