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OILFIELD CEMENTATION EQUIPMENT NAMELY TUBING AND CASING CENTRALIZERS, CEMENT BASKETS, SCRATCHERS, WELLBORE WIPERS, AND STOP COLLARS; AND OIL FIELD * FLOAT EQUIPMENT-NAMELY, FLOAT SHOES, FLOAT * COLLARS, GUIDE SHOES, INSERT FLAPPER VALVES, LATCHDOWN BAFFLES AND PLUGS, BAFFLE COLLARS, FLOAT EQUIPMENT ACCESSORIES-NAMELY CROSSOVERS, COMBINATION COUPLINGS, BELL NIPPLES, AND ROTARY SUBS, AND STAGE CEMENTING TOOLS COMPRISING BODIES WITH CEMENTING PORTS, OPENING SLEEVES, CLOSING SLEEVES, AND PARTS THEREFOR