... Bore: 9-5/8 in to 20 API 6A oil drilling equipment- christmas tree consists of the casing head,tubing head ... ~20000Psi 2, Medium:Oil,Gas,Mud3, T.C.:-46°C~121°C(L.U)4, M.C.:AA,BB,CC,DD,EE,FF5, PSL ... Shanghai ,2 plants in Yancheng, Jiangsu→Over 200 employees oil drilling equipment -christmas tree