"OILWELL"

[BULL PLUGS, SWAGED NIPPLES, FLOW T'S, CASING HEADS, [TUBING HEADS, AND COMBINATION CASING AND TUBING HEADS ], ALL BEING IN THE NATURE OF FITTINGS FOR PIPES, TUBES, AND CASING]

[ CABLE TOOL WELL DRILLING UNITS, ] CROWN AND TRAVELLING BLOCKS, DRAW WORKS OR HOISTS, DRIVES FOR DRAW WORKS AND PUMPS, [ DRILL COLLARS, DRILL OR GRIEF STEMS, FEED CONTROLS FOR WELL DRILLING, GAS BOOSTER UNITS, ] [INTERNAL COMBUSTION ENGINES,] [ POLISHED ROD JACKETS, PORTABLE DERRICKS, PORTABLE MASTS, (PULL RODS ] , [ PULL ROD CLAMPS) ] ,PUMPS AND PARTS THEREOF, [ (PUMPING JACKS),((PUMPING POWERS)), ] PUMPING UNITS, [ REDUCTION GEARS, ] ROTARY DRILLING UNITS, [ ((STEAM ENGINES)), STUFFING BOXES, ((SUBSTRUCTURES FOR DERRICKS AND DRIVES)), SUCKER RODS, SUCKER ROD COUPLINGS, ] SWIVELS, TRANSMISSIONS, WELL DRILLING ROTARIES [ AND ((WELL PACKERS)) ]