OILWELL
OIL-WELL RIGS, [ OIL-WELL DERRICKS, RIG PARTS, DERRICK PARTS, ] PORTABLE DRILLING-MACHINES, [ PORTABLE WELL-PULLING MACHINES, DRIVE-WELL AND TEST-BORING MACHINES, CORE-DRILLS, ] OUTFITS FOR SINKING WELLS OF LARGE DIAMETER THROUGH SOFT FORMATIONS, [ RIG-IRONS, ] STEEL CROWN-BLOCKS, [ SAND-REELS, STEAM-ENGINES, ] GAS-ENGINES; [ BOILER AND ENGINE FITTINGS--NAMELY, TUBE-EXPANDERS, FLUE-CLEANERS, STEAM-WHISTLES, INSPIRATORS, AND INJECTORS; ] STEAM-PUMPS, [ ROTARY PUMPS, JET-PUMPS, ] SLUSH-PUMPS, [...
Registered · June 23, 1920 · 71134086 ·