72064731
Dec 22, 1958
Apr 12, 1960
OILFIELD TOOLS AND EQUIPMENT-NAMELY, HOISTS; PUMPS AND PUMP DRIVES; MASTS; DERRICKS; RIGS; ROTARY TABLE DRIVE ASSEMBLIES; SPUDDING ASSEMBLIES; CLUTCHES; CATHEADS; TRACTOR-MOUNTED BOOMS AND CRANES; SINGLE AND MULTIPLE ENGINE DRAW WORKS; WINCHES; VARIABLE SPEED DRIVES; CORE-DRILL SLUSHPUMP MOUNTINGS; BACK FILLERS; PIPE BENDERS; TRACTOR-TYPE GENERAL WELL SERVICING UNITS WITH VARIOUS ASSEMBLIES FOR CLEANOUT, DEEPENING, OR DRILLING IN WITH CABLE TOOLS, AND FOR ROTARY AND CORE DRILLING OPERATIONS
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