... api qualified fty sale oilfield spart parts manufacturer of stud nuts,tubing hanger ,casing hanger,gasket ... domestic and overseas oil fields, it consists of caing head, casing spool,tubing spool,tubing ... ,studded cross, gate valve,choke valve and the tree cap. All wellhead tree manufctured by ... and life ! B.rgdsDavis oilfield spart parts manufacturer of stud nuts,tubing hanger ,casing hanger,gasket,wave ...