Casing head
　　Casing hanger for casing head and casing spool has straight type seat bore and 45°cone of hanging shoulder, with fine loading ability.
　　if required, it can be designed in integral or split structure.
　　The connecting type of casing head and surface casing is weld, thread and slip type.
　　The connecting type of side outlet includes thread, bolted flange and flange
　　Matched casing hanger structural type: slip, thread(mandrel);
　　In the bottom of casing head and casing spool sets casing secondary seal mechanism and sealing test port.

　　Casing head&Casing hanger
　　Casing hanger is classified into two kinds, i.e. the threaded (mandrel) and the slipped; slip casing hanger consists of G, W, WD, WE and other types, WD hanger is applicable for connection of casing head and surface casing and keeps the slip closing the casing fast in use of outer force, W hanger adopts self-weight energized sealing structure and WE & G hanger is manual-energized sealing structure.