... 20 API 6A oil drilling equipment- christmas tree consists of the casing head,tubing head and christmas tree.The main technical specifications:1, W ... ,Gas,Mud3, T.C.:-46°C~121°C(L.U)4, M.C.:AA,BB,CC,DD,EE,FF5, PSL:PSL1 ... plants in Yancheng, Jiangsu→Over 200 employees oil drilling equipment -christmas tree