System and method for riser recoil control
AssigneeCooper Cameron Corporation
InventorLarry Russell Jordon
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AssigneeCooper Cameron Corporation
InventorLarry Russell Jordon
Estimating the term…
A riser recoil control system (10) adjusts tension forces (F1, F2) applied to a marine riser (60), which is attached to an anchored, floating vessel (30) and a wellhead (80). The riser (60) is attached to the vessel (30) using tension forces (F1, F2) asserted by riser tensioners (20). Each tensioner (20) has an air shutoff valve (110), and an orifice-controlled fluid valve (120). A disconnection sensing means (200) provides a disconnect signal when the riser (60) is disconnected from the wellhead (80), which closes the valves (110, 120) and adjusts the tension forces (F1, F2) applied by the tensioners (20). The invention includes a method for adjusting the tension forces (F1, F2) applied to the riser (60), including sensing the disconnect signal and adjusting the tension forces (F1, F2) supplied to the riser (60) by closing the air shutoff valves (110) and partially closing the orifice-controlled fluid valves (120).
A riser recoil control system for adjusting a plurality of tension forces applied to a riser conductor attached to a floating vessel, wherein the riser is adapted to be connected to and disconnected from a wellhead, comprising:
A method for adjusting a plurality of tension forces applied to a marine riser attached to a floating vessel by a plurality of riser tensioners in mechanical communication with the vessel and the riser, each one of the plurality of riser tensioners having an air shutoff valve and an orifice-controlled fluid valve set to a first preselected flow limit value, wherein the riser is adapted to be connected to and disconnected from a wellhead, and wherein a disconnection sensing means is adapted to provide a disconnect signal to the plurality of air shutoff valves and orifice-controlled fluid valves when the riser is disconnected from the wellhead, comprising the steps of:
Dependencies are inferred from the claim text.