Deck mounted pull riser tensioning system
First Claim
1. A deck mounted pull riser tensioning system for a floating platform or vessel, comprising:
- at least two hydraulic or pneumatic cylinders having a cylinder body supported at a lower end on a tensioner support structure of said platform or vessel in spaced apart relation and having cylinder rods extending downwardly from said cylinder body lower ends through the deck;
a load structure member connected to lower ends of said cylinder rods and having an opening therethrough for receiving a portion of a riser extending from the seafloor; and
a vertically adjustable riser attachment supported on said load structure member over said opening for attachment to a portion of a riser extending through said load structure opening and generally centrally between said cylinders, said riser attachment adjustably positioned on the riser to accommodate variations in riser stack-up relative to the seafloor;
said cylinders, when activated, pulling upwardly on said load structure member to exert an upward force on the riser at the location of the riser attachment.
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Accused Products
Abstract
A deck mounted pull riser tensioning system for a floating platform or vessel includes at least two cylinders having a cylinder body supported at an upper or lower end on a deck or tensioner support structure of the platform or vessel in spaced apart relation with the cylinder rods extending downwardly from the cylinder body, or vice versa. A load structure member is connected to lower ends of the cylinder rods or bodies and has an opening therethrough for receiving a portion of a riser extending from the seafloor. A vertically adjustable riser attachment supported on the load structure member over the opening attaches to a portion of the riser extending through the opening and generally centrally between the cylinders. The cylinders pull upwardly on the load structure member to exert an upward tensioning force on the riser at the location of the riser attachment.
33 Citations
17 Claims
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1. A deck mounted pull riser tensioning system for a floating platform or vessel, comprising:
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at least two hydraulic or pneumatic cylinders having a cylinder body supported at a lower end on a tensioner support structure of said platform or vessel in spaced apart relation and having cylinder rods extending downwardly from said cylinder body lower ends through the deck;
a load structure member connected to lower ends of said cylinder rods and having an opening therethrough for receiving a portion of a riser extending from the seafloor; and
a vertically adjustable riser attachment supported on said load structure member over said opening for attachment to a portion of a riser extending through said load structure opening and generally centrally between said cylinders, said riser attachment adjustably positioned on the riser to accommodate variations in riser stack-up relative to the seafloor;
said cylinders, when activated, pulling upwardly on said load structure member to exert an upward force on the riser at the location of the riser attachment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A deck mounted pull riser tensioning system for a floating platform or vessel, comprising:
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at least two hydraulic or pneumatic cylinders having a cylinder body supported at an upper end in a generally vertical orientation beneath a tensioner support structure of said platform or vessel in a spaced apart relation and having cylinder rods extending downwardly from lower ends of said cylinder body;
a load structure member connected to lower ends of said cylinder rods and having an opening therethrough for receiving a portion of a riser extending from the seafloor; and
a vertically adjustable riser attachment supported on said load structure member over said opening for attachment to a portion of a riser extending through said load structure opening and generally centrally between said cylinders, said riser attachment adjustably positioned on the riser to accommodate variations in riser stack-up relative to the seafloor;
said cylinders, when activated, pulling upwardly on said load structure member to exert an upward force on the riser at the location of the riser attachment. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A deck mounted pull riser tensioning system for a floating platform or vessel, comprising:
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at least two hydraulic or pneumatic cylinders having a cylinder body supported on a tensioner support structure of said platform or vessel in spaced apart relation and having cylinder rods extending downwardly from said cylinder body lower ends through said tensioner support structure;
a load structure member connected to lower ends of said cylinder rods and having an opening therethrough for receiving a portion of a riser extending from the seafloor; and
a vertically adjustable riser attachment supported on said load structure member over said opening for attachment to a portion of a riser extending through said load structure opening and generally centrally between said cylinders, said riser attachment adjustably positioned on the riser to accommodate variations in riser stack-up relative to the seafloor;
said cylinders, when activated, pulling upwardly on said load structure member to exert an upward force on the riser at the location of the riser attachment.
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17. A deck mounted pull riser tensioning system for a floating platform or vessel, comprising:
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at least two hydraulic or pneumatic cylinders having a cylinder rod supported at an upper end in a generally vertical orientation beneath a tensioner support structure of said platform or vessel in a spaced apart relation and having a cylinder body extending downwardly from said cylinder rod;
a load structure member connected to lower ends of said cylinder body and having an opening therethrough for receiving a portion of a riser extending from the seafloor; and
a vertically adjustable riser attachment supported on said load structure member over said opening for attachment to a portion of a riser extending through said load structure opening and generally centrally between said cylinders, said riser attachment adjustably positioned on the riser to accommodate variations in riser stack-up relative to the seafloor;
said cylinders, when activated, pulling upwardly on said load structure member to exert an upward force on the riser at the location of the riser attachment.
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Specification