wellhead equipment working pressure: 2000~15000psi nominal size: 2 1/16~ ... AA~FF,PR1, P.U connect: flange,clamp wellhead equipment 1.Fix drilling wellhead, connect wellhead casing string, seal and control the annular of ... casing, suspend tubing, control wellhead pressure and adjust flow rate, also induce oil into outlet ... 8.Material class: AA,BB,CC,DD,EE,FF wellhead equipment