Marine riser tensioner

Details Marine riser tensioner Marine riser tensioner

E - Fixed Constructions

21

B

166/51

E21B 33/035 (2006.01) E21B 7/128 (2006.01) E21B 19/00 (2006.01) E21B 19/09 (2006.01)

Patent

CA 1205740

-21- ABSTRACT OF THE DISCLOSURE Motion compensating apparatus for maintaining a tension load on a marine riser supported from a floating platform which is subject to movement by wave action and the like. Bending movements induced by the roll and pitch of the vessel are decoupled by a resilient bearing member having an annular section of a substantially spherical laminated body of superposed layers of an elastic material and a relatively inelastic material. A tension load is applied to the riser by a hydraulic actuator which is supported by the resilient bearing member. The actuator includes a displacement compensating cylinder having an adjustable volume of hydraulic fluid presented to a piston in the cylinder for supporting the upper end of the marine riser. The displacement of fluid in the cylinder varies in response to the heave of the vessel to maintain a positive lifting force on the marine riser. An accumulator is connected in fluid communication with the pressure chamber of the hydraulic actuator for supplying hydraulic fluid to and for receiving hydraulic fluid from the pressure chamber in response to changes in its volume. Hydraulic fluid leakage past the actuator seals is monitored through a fluid circuit including pressure switches and leakage flow indicators.

422813

Affiliated with

Also associated with

Rating

Marine riser tensioner does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Marine riser tensioner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Marine riser tensioner will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1297955