member extending from a lower end of the restraint cone the tension member configured to engage a lower end of the riser tensioner and maintain a wedging action between the restraint cone and the hydraulic cylinders application_number US 53785509 A description in one aspect embodiments disclosed herein relate to apparatus and methods to secure a direct acting riser tensioner when not connected to a riser referring to fig1 a typical direct acting hydraulic riser tensioner system on a drilling vessel 5 is shown hydraulic cylinders 1 may be very large with outer diameters above 20 inches and stroke lengths up to about 70 feet typically riser tensioner systems have an even number of hydraulic cylinders 1 commonly six hydraulic cylinders hydraulic cylinders 1 are attached on their lower ends to a riser ring 2 which is attachable to the upper end of the riser string not shown riser ring 2 may for example be hinged and hydraulically latched to the top riser joint for easier attachment hydraulic cylinders 1 may be attached at their upper ends 3 to a riser tensioner trolley 4 that runs on tracks 4 a tracks 4 a are attached to a structure of drilling vessel 5 typically to a drilling substructure that straddles the moon pool and supports the drill floor and derrick because the geometry of a drilling vessel dictates that the upper attachment points for a riser tensioner are farther apart than the diameter of the riser ring 2 the assembled hydraulic cylinders 1 attached to the drilling vessel 5 and the riser ring 2 generally form an.