HERCULES

OIL WELL AND OIL FIELD TOOLS AND EQUIPMENT-NAMELY, CASING HEADS, TUBING HEADS, TUBING HANGERS, PUMPING AND FLOWING T'S, POLISH ROD STUFFING BOXES, [ FLOW HEADS, ANCHORS, SPIDERS, TUBING ROTATERS, OIL SAVERS, ] CASING HEAD ADAPTERS, RELIEF VALVES, AND LIKE ARTICLES FOR PUMPING AND FLOWING OIL WELLS