73632421
Nov 25, 1986
Oct 11, 1988
SUBSURFACE OIL WELL COMPLETION, ANCHORING, INSERTING, REMOVING AND FLOW CONTROL DEVICES, NAMELY LOCKING MANDRELS, PLUGS, PACKOFFS, COLLAR AND TUBING STOPS, CROSSOVER SUBS, ROPE SOCKETS, JARS, BAILERS, WELLHEAD ADAPTERS, LUBRICATORS, STUFFING BOXES, UNIONS, SHIFTING TOOLS, KEYS, RUNNING AND PULLING TOOLS, RUNNING AND PULLING PRONGS, KICKOVER TOOLS AND PARTS THEREOF
Machinery