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, [ FORCE-PUMPS, EJECTORS, PITCHER-SPOUT PUMPS, HYDRAULIC RAMS, DRILLING AND FISHING TOOLS FOR CABLE SYSTEMS ] ROTARY WELL-DRILLING TOOLS; [ WELL EQUIPMENT--NAMELY, ELEVATORS, ANCHOR-CLAMPS, AND CASING-HEADS; OIL WELL PACKERS, ] PUMPING MACHINERY AND EQUIPMENT; [ OIL-WELL-PIPE TOOLS--NAMELY, PIPE-BENDERS, PIPE-CUTTERS, PIPE-THREADING MACHINES, STOCKS AND DIES, TONGS, WRENCHES, PIPE-DRILLS, AND PIPE-TAPPING MACHINES; OIL-WELL BLACKSMITH-TOOLS, ] AND PULLEY-BLOCKS