Bi-directional wellhead seal

A method for using a bi-directional wellhead seal comprising:

• providing an inner pipe having external threads on an upper end of the inner pipe and an abutment shoulder below the external threads;
• providing an outer pipe for sealing with the inner pipe;
• providing a sealing ring having a shaped outside diameter including a frustro-conical upper surface and a lower surface;
• providing a spring ejector ring maintaining axial pressure on said sealing ring lower surface upon axial compression of said rings, said spring ejector ring having a shaped outside diameter including a frustro-conical upper surface and having the outside diameter less than the sealing ring outside diameter;
• providing a sleeve nut having internal threads for attaching to external threads of the inner pipe;
• placing the spring ejector ring in contact with an abutment shoulder of the inner pipe;
• placing the sealing ring against the spring ring;
• and
• screwing the sleeve nut on the external threads of the inner pipe sufficient to deform the sealing ring such that the inner pipe and outer pipe are sealed from gas or fluid leakage.