Oil&Gas's Drilling Equipment is provided to jackup and floating rig drilling applications, which is a drilling riser system for depp-sea at least 10,000ft. In ganeral, it consists of Risers, Diverters, Connectors, Tension Rings, Telescopic Joint and Hydril Pressure Control. Tension Ring is a part attached to telescopic joint forming termination point between riser system and tensioning system, which is used to provide better stability to riser string.