High-pressure connection system

A connection system for a high-pressure screwed pipe joint of a pipe member, the pipe member having a radially outward facing peripheral enlargement, the peripheral enlargement having a first and a second surface, the system comprising:

• a coupling ring for producing a high-pressure connection, said ring mounted for contact with the first surface of the peripheral enlargement;
• a retention body, said retention body having a front surface;
• and means on said retention body and said coupling ring for connecting said coupling ring to said retention body;
• and
• a sealing ring disposed between said retention body and the peripheral enlargement to contact the second surface of the peripheral enlargement adjacent to the first surface thereof, said sealing ring having an inside surface facing an outer wall of the pipe member, a front surface immediately adjacent to said retention body front surface, a first recess containing a first sealing element adjacent to said front surface of said retention body to seal said sealing ring relative to said retention body, and a second sealing element disposed between said inside surface of said sealing ring and the outer wall of the pipe member to seal said sealing ring relative to the pipe member.