... Bore: 9-5/8 in to 20 API 6A oil drilling equipment- christmas tree consists of the casing head ... technical specifications:1, W.P.:2000Psi~20000Psi 2, Medium:Oil,Gas,Mud3, T.C.:-46°C~121°C(L ... heads/spools, tubing head adapters, casing hangers, tubing hangers, base plates, secondary seals, FC type slab gate valves, M ... 2 plants in Yancheng, Jiangsu→Over 200 employees oil drilling equipment -christmas tree