Pressure-containing tubular connections for remote operation

摘要: This invention is a method and apparatus for making pressure-containing threaded tubular connection, suitable remotely operated connection separation, utilizing electrical heating to reduce the amount of make up torque required produce reliable preloading connection. One aspect present comprises: 1) first hub with male threads on its exterior having sealing face axial flow passage, b) second an passage carrying annular seal which can be mated mounting rotatable nut female interior integral means. After stabbing initial make-up heated thereby expanded in controlled manner retightened. Following cooling, structural fully preloaded compressed so that it seals. Reversing procedure permits disconnection.