ZHOU YONG

Rolling cutter

Rolling cutter

Drill bit having geometrically sharp inserts

DRILL BITS HAVING ROTATING CUTTING STRUCTURES THEREON

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

LOCALIZED FEATURES AND MANUFACTURING METHODS FOR INSERTS OF ROCK BITS

Rolling cutter

METHODS FOR ENHANCING A SURFACE OF A DOWNHOLE TOOL AND DOWNHOLE TOOLS HAVING AN ENHANCED SURFACE

Roller Cones, Methods of Manufacturing Such Roller Cones, and Drill Bits Incorporating Such Roller Cones

Hardfacing compositions, methods of applying the hardfacing compositions, and tools using such hardfacing compositions

Composite sintered carbides

Rolling cutter

HIGH PRESSURE SINTERING WITH CARBON ADDITIVES

Multiple processes of high pressures and temperatures for sintered bodies

Drill bit reservoir with controllable relief pressure

Seal with dynamic sealing surface at the outside diameter

Rolling cutter

Drill bit and insert having bladed interface between substrate and coating

Simulation and modeling of rock removal control over localized zones for rock bit

Drill bit and cutter having insert clusters and method of manufacture

Rock-bit seals with asymmetric contact profiles

Method of designing and drilling systems made using rock mechanics models

Elastomeric seal assembly having auxiliary annular seal components

Drill bit and cutter element having multiple extensions

Multi-part energizer for mechanical seal assembly

Metal seal with impact-absorbing ring

Shaped cutter surface

Cutting structure for single roller cone drill bit

Drill bit cutter element having multiple cusps

Drill bit arcuate-shaped inserts with cutting edges and method of manufacture

Dynamic seal with soft interface