135211 ⎘
Drill bits; Roller bits combined with non-rolling cutters other than of leading-portion type
BLUNT-NOSED ROLLER CONE HYBRID BIT
#2EARTH-BORING TOOL GEOMETRY AND ASSOCIATED APPARATUS AND METHODS
#3Rolling blade PDC bit
#4Hybrid bit
#5Drill bit with offset counter-rotating cutters
#6DRILL BIT DESIGN METHOD BASED ON ROCK CRUSHING PRINCIPLE WITH LOCAL VARIABLE STRENGTH
#7Mitigation of backward whirl in drill bits
#8Hybrid bit
#9Earth-boring tool geometry and cutter placement and associated apparatus and methods
#10Isolated lubrication system for drill bits
#11Hybrid drill bit
#12Drilling boreholes with a hybrid bit
#13Fixed cutting structure-composite cone drill bit
#14Hybrid bit with roller cones having inserts
#15Hybrid Drill Bit with Axially Adjustable Counter-Rotation Cutters in Center
#16Hybrid drill bit with axially adjustable counter-rotation cutters in center
#17Method of manufacturing and designing a hybrid drill bit
#18Drill bit design selection and use
#19Compliant rolling element retainer
#20A HYBRID BIT WITH ROLLER CONE HAVING INSERTS
#21Rolling element with half lock-wedge lock
#22Rolling element with half lock
#23Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto
#24Boring apparatus and method
#25Drill bit with adjustable inner gauge configuration
#26Split roller cone and PDC composite drill bit
#27DRILL BIT SYSTEM
#28Hybrid drill bit and design method
#29Earth-boring tools having fixed blades and rotatable cutting structures and related methods
#30Earth-boring tools including separable bearing assemblies for mounting roller cones to such tools
#31HYBRID ROLLER CONE AND JUNK MILL BIT
#32Earth boring tools having fixed blades, rotatable cutting structures, and stabilizing structures and related methods
#33Earth boring tools having fixed blades and varying sized rotatable cutting structures and related methods
#34Earth boring tools having fixed blades and rotatable cutting structures and related methods
#35Laterally oriented cutting structures
#36Hybrid drill bit with axially adjustable counter rotation cutters in center
#37HYBRID ROLLER-MILL BIT AND HYBRID ROLLER-DRAG BIT
#38HOLE FORMING TOOL WITH AT LEAST ONE ROTATABLE CUTTING MEMBER
#39Boring apparatus and method
#40EARTH-BORING ROTARY TOOLS HAVING FIXED BLADES AND ROLLING CUTTER LEGS, AND METHODS OF FORMING SAME
#41Hybrid drill bit with counter-rotation cutters in center
#42Drill bits, rotatable cutting structures, cutting structures having adjustable rotational resistance, and related methods
#43Hybrid roller cone and junk mill bit
#44Rolling cones with gage cutting elements, earth-boring tools carrying rolling cones with gage cutting elements and related methods
#45Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto
#46External, divorced PDC bearing assemblies for hybrid drill bits
#47Earth-boring tool having back up cutting elements with flat surfaces formed therein and related methods
#48HYBRID BIT WITH BLADES AND DISCS
#49HYBRID DRILL BIT
#50Multi-Piece Body Manufacturing Method Of Hybrid Bit
#51Rolling element assemblies
#52Hybrid drill bits having increased drilling efficiency
#53Earth-boring rotary tools having fixed blades and rolling cutter legs, and methods of forming same
#54Hybrid drill bits
#55Boring apparatus and method
#56Rolling element assemblies
#57Reverse circulation hybrid bit
#58Boring apparatus and method
#59Composite drill bit
#60Hybrid bit with mechanically attached roller cone elements
#61External, divorced PDC bearing assemblies for hybrid drill bits
#62Drill bits with anti-tracking features
#63System and method for leg retention on hybrid bits
#64Hybrid drill bit having increased service life
#65DOWNHOLE CUTTING TOOLS HAVING ROLLING CUTTERS WITH NON-PLANAR CUTTING SURFACES
#66Spacing of rolling cutters on a fixed cutter bit
#67HYBRID BIT WITH ROLLER CONES NEAR THE BIT AXIS
#68Earth-boring tools including movable formation-engaging structures and related methods
#69DOWNHOLE CUTTING TOOLS HAVING HYBRID CUTTING STRUCTURES
#70Hybrid drill bit and design method
#71Hybrid drill bit
#72PDC BITS HAVING ROLLING CUTTERS AND USING MIXED CHAMFERS
#73Hybrid drill bits having increased drilling efficiency
#74Inner gauge ring drill bit
#75Composite drill bit
#76SYSTEM AND METHOD FOR LEG RETENTION ON HYBRID BITS
#77System and method for adjusting roller cone profile on hybrid bit
#78Drill bits with anti-tracking features
#79Hybrid bit with variable exposure
#80EARLY WEAR DETECTION
#81High-shear roller cone and PDC hybrid bit
#82Modular hybrid drill bit
#83External, divorced PDC bearing assemblies for hybrid drill bits
#84Hole opener with hybrid reaming section
#85HOLE OPENER WITH HYBRID REAMING SECTION
#86Hole opener with hybrid reaming section
#87Hole opener with hybrid reaming section and method of making
#88Hybrid bit with variable exposure
#89Hybrid drill bit
#90Adaptive control concept for hybrid PDC/roller cone bits
#91Hybrid drill bit with high bearing pin angles
#92HYBRID DRILL BIT WITH HIGH PILOT-TO-JOURNAL DIAMETER RATIO
#93Hybrid drill bit with secondary backup cutters positioned with high side rake angles
#94HYBRID DRILL BIT AND METHOD OF USING TSP OR MOSAIC CUTTERS ON A HYBRID BIT
#95Dynamically stable hybrid drill bit
#96MODULAR HYBRID DRILL BIT
#97Hybrid drill bit and design method
#98Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
#99Hybrid drill bit and method of drilling