MICROTUNNELING APPARATUS

Retainer for rotary cone drill bit

Protected back-up rings for metal face seals and earth boring tools incorporating the same

SHANK ADAPTER, ROCK DRILLING MACHINE AND METHOD

SHANK ADAPTER, ROCK DRILLING MACHINE AND METHOD

Hybrid bit

Spiral magnetic fluid composite sealing structure of roller bit

Roller cutting tool with improved sealing

Isolated lubrication system for drill bits

Cutting roller

Wear resistant downhole piston

Combined crushing super-variable-diameter drill bit for natural gas hydrate exploitation

SEAL STRUCTURE

Seal assembly for use in earth-boring rotary tools in subterranean boreholes and related methods

Seal assembly for downhole use

Seal structure

Earth-boring tools including separable bearing assemblies for mounting roller cones to such tools

SEALING ARRANGEMENT

Roller reamer with mechanical face seal

Roller reamer with labyrinth seal assembly

Sealing elements for roller cone bits

Seal arrangement for rotating equipment

Movable cutters and devices including one or more seals for use on earth-boring tools in subterranean boreholes and related methods

Vertical high speed testing device for spiral seal of cone bit bearing

Horizontal high speed testing device for spiral seal of horizontal cone bit bearing

Earth-boring tools including polymer matrix composite hardfacing material and related methods

Roller cone bit having gland for full seal capture

Nested bearing and seal for roller cone drill bit

Cutter for boring head

Bore tube for a pressure compensation system in a roller cone drill bit

By-pass fluid passageway for drill tool

Bearings for downhole tools, downhole tools incorporating such bearings, and related methods

External, divorced PDC bearing assemblies for hybrid drill bits

Drill bit seal and method of using same

Intergland grease

SEAL ASSEMBLY AND A ROLLER CONE DRILL BIT COMPRISING SUCH A SEAL ASSEMBLY

Compensator clip ring retainer cap for a roller cone drill bit

Seal assemblies for earth-boring tools, earth-boring tools so equipped, and related methods

BICOMPONENT SEALS COMPRISING ALIGNED ELONGATED CARBON NANOPARTICLES

Elastomer-thermally conductive carbon fiber compositions for roller-cone drill bit seals

Sacrificial spacer for well tool inner seal

Roller cone seal failure detection using an integrated computational element

Flow bypass compensator for sealed bearing drill bits

Articles containing carbon composites and methods of manufacture

ROLLER CUTTER WITH IMPROVED SEALING

THIN FILM COATING ON MECHANICAL FACE SEALS

Symmetrical seal

Enhanced backup ring edge features for metal face seal in roller cone drill bits

Well Tool with Dynamic Metal-to-Metal Shape Memory Material Seal

Joints comprising carbon nanoforests

Composite metallic elastomeric sealing components for roller cone drill bits

Hole opener bearing arrangement

Drill bit with a dynamic metal seal

Floating plug pressure equalization in oilfield drill bits

Enhanced Backup Ring Edge Features for Metal Face Seal in Roller Cone Drill Bits

Enhanced backup ring features for metal face seal in roller cone drill bits

Rock bit having a pressure balanced metal faced seal

Rock bit having a flexible metal faced seal

Rock bit having a radially self-aligning metal faced seal

Downhole elastomeric components including barrier coatings

DRILL BIT SEAL AND METHOD OF USING SAME

DRILL BIT WITH SEAL HAVING SPHERES IN A MATRIX SEAL MATERIAL

Roller reamer compound wedge retention

Rock bit having a labyrinth seal/bearing protection structure

SEALING (PACKING) RING

HIGHLY WEAR RESISTANT COMPOSITE ROTARY SEALS WITH WEAR LAYER AT INNER DIAMETER AND/OR OUTER DIAMETER EMBEDDED INSIDE OR BETWEEN RUBBER LAYERS

Method and apparatus for a true geometry, durable rotating drill bit

Method and apparatus for a true geometry, durable rotating drill bit

Method and apparatus for reducing lubricant pressure pulsation within a rotary cone rock bit

Drill bit with extended life seal

Patterned texturing of the seal surface for a roller cone rock bit

Rock bit having a mechanical seal with superior thermal performance

Texturing of the seal surface for a roller cone rock bit

Tri-cone bit for high RPM drilling applications

Composite metallic elastomeric sealing components for roller cone drill bits

DRILL BIT BEARING CONTACT PRESSURE REDUCTION

Method and apparatus for a true geometry, durable rotating drill bit

External, divorced PDC bearing assemblies for hybrid drill bits

SYNERGIC SURFACE MODIFICATION FOR BEARING SEAL

Seal Ring With Auxiliary Ring for Earth-Boring Bit

Rock bit with a thermal insulating seal ring positioned in the seal gland

Seal assembly for a rotary earth bit

Rock bit having a seal gland with a conical sealing surface

Rock bit having a seal gland with a conical sealing surface

BEARING SEAL WITH IMPROVED CONTACT WIDTH

Cutter assembly for a raise boring reamer

SEAL ASSEMBLY FOR A ROTARY EARTH BIT

Spacer ring for elastomeric seal

System, Method and Apparatus for Composite Seal Gland Insert in Roller Cone Rock Bit

Roller bearing seal companion ring having textured surface for holding lubricant and small particles

Seal comprising elastomeric composition with nanoparticles

Earth Boring Bit with DLC Coated Bearing and Seal

Texturing of the seal surface for a roller cone rock bit

Earth boring bit with wear resistant bearing and seal

Roller cone bit bearing with elastomeric seal having self break-in property and method

Rock bit with a thermal insulating seal ring positioned in the seal gland

DRILLBIT SEAL

Rock bit having a seal gland with a conical sealing surface

USE OF NANOSIZED PARTICULATES AND FIBERS IN ELASTOMER SEALS FOR IMPROVED PERFORMANCE METRICS FOR ROLLER CONE BITS

Elastomer Material for High Temperature Roller Cone Bits

System, method, and apparatus for contoured thrust surfaces between thrust washer and head for roller cone drill bit

Seal with dynamic sealing surface at the outside diameter

Bearing insert sleeve for roller cone bit

Stabilized seal for rock bits

Excluder ring for earth-boring bit

CUTTINGS REMOVAL WIPERS FOR CUTTER ASSEMBLIES AND METHOD

Roller Cone Drill Bit With Enhanced Debris Diverter Grooves

Roller cone drill bit with debris flow paths through associated support arms

Roller cone drill bit with debris diverter plugs

Self relieving seal

Seal insert ring for roller cone bits

Magnetic face seal for rock drill bit bearings

Earth boring bit lubricant chamber barrier member with dispersed fibers

PCD face seal for earth-boring bit

Roller cutter

Roller cone bits with reduced packing

Self relieving seal

Rock-bit seals with asymmetric contact profiles

Metal face seal for an earth-boring bit

Elastomeric seal assembly having auxiliary annular seal components

Drilling tool with elastomer seal having graded properties

Method for manufacturing a drilling tool with an elastomer seal having graded properties

Multi-part energizer for mechanical seal assembly

Metal seal with impact-absorbing ring

Mud diverter for earth-boring bit

Mud debris diverter for earth-boring bit

Ion-beam assisted deposition of inorganic coatings for elastomeric seal wear resistance improvement

Drill bit having an improved seal and lubrication method using same

Bearing seal

Lip seal for roller cone drill bit

Dynamic seal with soft interface

Dual function pressure compensator for a lubricant reservoir of a sealed rock bit

Sealed bearing rock bit with a low profile seal

Drilling system with drill bit for mining machine