Angular and radial self-aligning coupling

A coupling mounted on a telescoping joint suspended within a riser swivel tension ring for connecting a fluid line on the telescoping joint to an auxiliary fluid line on said riser swivel tension ring, comprising:

• a first body having a first flow bore therethrough forming first and second ports, said first body being adapted for mounting said first port to the fluid line;
• said first body having an enlarged counterbore around said second port, said counterbore forming a convex surface around said first flow bore at said second port;
• a first plate having a bore therethrough aligned with said first flow bore and having an annular bearing surface on one side and a concave surface on another side, said concave surface matingly engaging said convex surface and being slidable thereon to a limited extent to form an angular joint;
• a second plate having a bore therethrough and aligned with said first flow bore, said second plate having a bearing face on one side and a stab counterbore on another side, said bearing face engaging said bearing surface and being radially movable thereon to a limited extent to form a radial joint;
• a second body mounted on the riser swivel tension ring and having a cylinder receiving a piston reciprocably mounted therein, said piston having a second flow bore therethrough;
• and
• said piston having a stabbing position wherein said piston is received within said stab counterbore for communicating said first and second flow bores, said angular joint and radial joint allowing the stabbing of said piston within said stab counterbore where the piston is not angularly or radially aligned with said stab counterbore.