MOTION COMPENSATING FLOOR SYSTEM AND METHOD
First Claim
1. A motion compensating system usable on a vessel during well intervention operations through a riser, wherein the motion compensation system comprises:
- an upper floor having an opening therethrough;
a lower base having an opening therethrough, the lower base positioned below the upper floor,a first plurality of cylinders extending between the upper floor and the lower base, wherein each cylinder of the first plurality of cylinders is pivotally connected to the upper floor and the lower base for moving the upper floor with respect to the lower base; and
a riser tensioner having an upper portion, a lower portion, and a central cavity extending longitudinally through the upper portion and the lower portion, wherein the upper portion is adapted for connection with a riser or an intermediate tubular member that is connectable to the riser, wherein the lower portion is connected to the lower base within or about the opening of the lower base, wherein the riser tensioner comprises a second plurality of cylinders connected between the upper portion and the lower portion.
1 Assignment
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Accused Products
Abstract
A motion compensating system and method for use on a vessel during well intervention operations through a riser. The system can comprise an upper floor having an opening therethrough, a lower base having an opening therethrough positioned below the upper floor, a first plurality of cylinders extending between the upper floor and lower base, and a riser tensioner. Each cylinder of the plurality of cylinders can be pivotally connected to the upper floor and lower base for moving the upper floor with respect to the lower base. The riser tensioner can have an upper portion, lower portion, and central cavity extending longitudinally through the upper and lower portions, wherein the upper portion can be adapted for connection with a riser or an intermediate tubular member that is connectable to the riser. The lower portion can be connected to the lower base within or about the opening of the lower base.
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Citations
20 Claims
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1. A motion compensating system usable on a vessel during well intervention operations through a riser, wherein the motion compensation system comprises:
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an upper floor having an opening therethrough; a lower base having an opening therethrough, the lower base positioned below the upper floor, a first plurality of cylinders extending between the upper floor and the lower base, wherein each cylinder of the first plurality of cylinders is pivotally connected to the upper floor and the lower base for moving the upper floor with respect to the lower base; and a riser tensioner having an upper portion, a lower portion, and a central cavity extending longitudinally through the upper portion and the lower portion, wherein the upper portion is adapted for connection with a riser or an intermediate tubular member that is connectable to the riser, wherein the lower portion is connected to the lower base within or about the opening of the lower base, wherein the riser tensioner comprises a second plurality of cylinders connected between the upper portion and the lower portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A motion compensating system usable to stabilize personnel or equipment located thereon during well intervention operations through a riser, wherein the motion compensation system comprises:
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an upper floor having an open space therein; a lower base having an open space therein positioned below the upper floor, wherein the upper floor is movable with respect to the lower base; a plurality of cylinders extending between the upper floor and the lower base, wherein each cylinder of the plurality of cylinders is pivotally connected to the upper floor and the lower base for moving the upper floor with respect to the lower base; and a riser tensioner apparatus comprising a bracket and a base portion each having a central open space, wherein the upper bracket is connectable with a riser or another member that is connectable with the riser, wherein the base portion is connected to the lower base, and wherein the bracket is movable toward and away from the base portion. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for stabilizing a riser platform on a vessel, the method comprising:
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positioning the riser platform above a base platform connected to the vessel; actuating and pivoting a first plurality of hydraulic cylinders connecting the riser platform and the base platform in response to motion of the vessel relative to the riser platform; and actuating a second plurality of hydraulic cylinders connecting a riser tensioner to the riser platform in response to motion of the riser platform relative to a riser, wherein the first plurality of cylinders are actuated to keep the riser platform at a constant level, and wherein the second plurality of cylinders are actuated to keep the riser at a constant tension. - View Dependent Claims (17, 18, 19, 20)
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Specification