Lower sealing body of environmental protection closed rotary BOP

Upper sealing body of environmental protection closed rotary BOP

New drive for offshore drilling

New sealer for offshore drilling

Improved cylindrical throttle valve

Valve seat sealing ring

20 transfer tray assembly for underbalanced drilling rotary assembly

20 ferrule casing head

20 mud umbrella assembly of environmental protection closed rotary BOP

Carbon dioxide silencing emission device

Carbon dioxide heating deep buried device

Automatic water make-up device for boiler of pressure injection equipment for carbon dioxide production