... wellhead assembled of tree cap and gauge bull plug,threaded nipple NB:2-9/16" to ... Mpa wellhead oil wellhead assembled of gauge bull plug, tree cap,threaded nipple,top connetctor,valves, ... casing spool,tubing spool,tubing head adapter,studded cross, threaded flanges,adapter spool,gate valve,choke valve and ... oil wellhead assembled of threaded nippe,solid bull plug,tree cap,cap flange,top connector, valves, ...