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1. Wellhead Casing Structure Wellhead casing usually consists of four-way, casing hanger, top wire assembly, flange parallel gate valve, connector, pressure display mechanism, etc; 2. Working principle of Rubber Seal The wellhead casing consists of the wellhead casing body, BT seal, casing hanger, dovetail seal , lockdown screw seal and sealing gasket. The casing hanger seat is hung on the steps o...
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