WELLMASTER

Large-bore system for deepwater casing and liner running comprising a cementing head, dart alignment submersibles, surge reduction tool, a liner hanger system with associated running tools, namely, polished bore receptacle, liner top packer, liner hanger, darts, plugs, centralizer submersibles, plug indicator, mechanical ball seat, auto-fill float valves, debris reduction shoe, reamer shoe, a rotating guide shoe and retractable shoe for use in the hydrocarbon exploration and production field