System and method for heading control of a floating LNG vessel using a set of real-time monitored cargo containment system strain data
First Claim
1. A system for offshore production of liquefied natural gas (LNG) from a floating liquefied natural gas (FLNG) vessel, wherein the system is connected to a natural gas receiving system, wherein the system comprises:
- a FLNG vessel comprising a hull and a deck;
a topsides hydrocarbon processing facility installed at or above the deck of the hull of the FLNG vessel;
a FLNG vessel cargo containment system comprising one or more insulated FLNG vessel cryogenic storage tanks installed within the hull of the FLNG vessel, the FLNG vessel being un-moored to a sea bed so as to facilitate dynamic positioning of the FLNG vessel during system operation;
a dynamic positioning control system operatively associated with a system of thrusters onboard the FLNG vessel wherein the dynamic positioning control system maintains the FLNG vessel at a desired heading around a station keeping point during LNG cargo offloading operations; and
a computer processor for receiving a set of real-time monitored environmental data, wherein the computer processor is programmed with a mathematical algorithm to;
(i) compare the set of real-time monitored environmental data to a set of stored set points held in a data storage means;
(ii) generate a heading control correction signal when the set of real-time monitored environmental data exceeds or falls below one or more of the set of stored set points for the FLNG vessel; and
(iii) transmit the heading control correction signal to the dynamic positioning control system;
wherein the set of real-time monitored environmental data includes a set of real-time monitored cargo containment system strain data associated with a level of strain experienced by the FLNG vessel cargo containment system, and, the set of stored set points held in the data storage means includes a set of real-time monitored cargo containment system integrity set points.
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Accused Products
Abstract
A system for offshore production of LNG from an FLNG vessel includes a floating LNG vessel including a hull and a deck, a topsides hydrocarbon processing facility installed at or above the deck of the hull of the FLNG vessel, a FLNG vessel cargo containment system comprising one or more insulated FLNG vessel cryogenic storage tanks installed within the hull of the FLNG vessel, a dynamic positioning control system operatively associated with a system of thrusters onboard the FLNG vessel where the dynamic positioning control system maintains the FLNG vessel at a desired heading around a station keeping point during LNG cargo offloading operations, and a computer processor for receiving a set of real-time monitored environmental data.
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Citations
22 Claims
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1. A system for offshore production of liquefied natural gas (LNG) from a floating liquefied natural gas (FLNG) vessel, wherein the system is connected to a natural gas receiving system, wherein the system comprises:
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a FLNG vessel comprising a hull and a deck; a topsides hydrocarbon processing facility installed at or above the deck of the hull of the FLNG vessel; a FLNG vessel cargo containment system comprising one or more insulated FLNG vessel cryogenic storage tanks installed within the hull of the FLNG vessel, the FLNG vessel being un-moored to a sea bed so as to facilitate dynamic positioning of the FLNG vessel during system operation; a dynamic positioning control system operatively associated with a system of thrusters onboard the FLNG vessel wherein the dynamic positioning control system maintains the FLNG vessel at a desired heading around a station keeping point during LNG cargo offloading operations; and a computer processor for receiving a set of real-time monitored environmental data, wherein the computer processor is programmed with a mathematical algorithm to; (i) compare the set of real-time monitored environmental data to a set of stored set points held in a data storage means; (ii) generate a heading control correction signal when the set of real-time monitored environmental data exceeds or falls below one or more of the set of stored set points for the FLNG vessel; and (iii) transmit the heading control correction signal to the dynamic positioning control system; wherein the set of real-time monitored environmental data includes a set of real-time monitored cargo containment system strain data associated with a level of strain experienced by the FLNG vessel cargo containment system, and, the set of stored set points held in the data storage means includes a set of real-time monitored cargo containment system integrity set points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for offshore production of LNG from an FLNG vessel, the FLNG vessel comprising a hull and a deck, a topsides hydrocarbon processing facility installed at or above the deck of the hull of the FLNG vessel, and a FLNG vessel cargo containment system comprising one or more insulated FLNG vessel cryogenic storage tanks installed within the hull of the FLNG vessel, the method comprising:
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maintaining, via a dynamic positioning control system that operates a system of thrusters onboard the FLNG vessel, the FLNG vessel at a desired heading around a station keeping point during LNG cargo offloading operations and while the FLNG vessel is un-moored to a sea bed; receiving a set of real-time monitored environmental data; and via the computer processor; comparing the set of real-time monitored environmental data to a set of stored set points held in a data storage means; generating a heading control correction signal when the set of real-time monitored environmental data exceeds or falls below one or more of the set of stored set points for the FLNG vessel; and transmitting the heading control correction signal to the dynamic positioning control system; wherein the set of real-time monitored environmental data includes a set of real-time monitored cargo containment system strain data associated with a level of strain experienced by the FLNG vessel cargo containment system, and, the set of stored set points held in the data storage means includes a set of real-time monitored cargo containment system integrity set points.
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Specification