A roller bit with parallel inlayed compacts
A roller drill pipe protector
A rotary drill bit and a roller cutter for rock drilling
A rotating dry drilling bit
A seal for a longitudinally movable drillstring component
A self energizing seal element
A shoe for wellbore lining tubin
A silicate breaker for silicate drilling fluids in...
A simplified sealing and anchoring device for a well tool
A single cone bit with offset axis and composite cones
A sinker bar for cable-operated well apparatus in a...
A sleeve arrangement
A sleeve for orientating a tool
A sleeve valve for controlling fluid flow between a...
A spearhead assembly
A steam-gas-solvent (sgs) process for recovery of heavy...
A steerable drilling assembly for mounting on the end of a...
A subsurface formation monitoring system and method
A subterranean apparatus for deflecting a cutting tool
A subterranean drainage pattern and a method for drilling...