Patent ID: 8157013

Claim:
A tensioner system with independently operable recoil controls for an offshore drilling rig for drilling wells, the tensioner system comprising a plurality of removable independently operable riser tensioner assemblies, wherein each removable independently operable riser tensioner assembly comprises: a. an independently operable fluid containment storage comprising a goose neck for connecting to a flexible jumper, wherein the independently operable fluid containment storage is disposed on an independently operable hydraulic cylinder that powers a rod, wherein the rod engages a clevis, wherein the independently operable hydraulic cylinder engages a blind end clevis opposite the clevis, wherein the clevis engages a tension ring on a drilling riser, and wherein the independently operable fluid containment storage is connected directly to and attached directly to the independently operable hydraulic cylinder; b. an integrated independently operable bidirectional riser recoil valve in direct fluid communication between the independently operable hydraulic cylinder and the independently operable fluid containment storage, wherein the integrated independently operable bidirectional riser recoil valve is connected directly to the independently operable fluid containment storage and is connected to the independently operable hydraulic cylinder; and c. an integrated independently operable recoil controller connected to and in communication with the integrated independently operable bidirectional riser recoil valve for regulating flow of the hydraulic fluid through the integrated independently operable bidirectional riser recoil valve to control a disconnect process of the drilling riser supported by the offshore drilling rig by controlled raising or lowering of the drilling riser, and wherein the integrated independently operable recoil controller is disposed at a location on the independently operable fluid containment storage or the independently operable hydraulic cylinder.