There are common wellhead, thermal recovery wellhead, offshore wellhead,high pressure sulfur-resistant oil(gas) wellhead, Wellhead Device Basic Parameters:Working pressure:2000PSI~15000PSIWorking medium:petrol,natural gas containing H2S and CO2Working temperature:46°C~121°C (LU class)Matenal class:AA,BB,CC,DD,EE,FF,HHSpecification class:PSL 1~4Performance class:PR1~2 Casing head Basic Parameters: ...