Mobile offshore drilling unit, a method of using such a unit and a system comprising such a unit
First Claim
1. An offshore well-processing system for performing one or more well-processing tasks on one or more wells in the seafloor of an off-shore oil or gas reservoir, the system comprising:
- a mobile offshore drilling unit and a remote well-processing device configured to be positioned on an offshore platform different from the mobile offshore drilling unit,the mobile offshore drilling unit defining one or more well centres and comprising at least one primary drill rig comprising at least one drill floor and at least one hoisting system for raising and lowering tubular equipment through one of said one or more well centres, wherein the mobile offshore drilling unit is a jack-up platform comprising a cantilever supporting said primary drill rig and configured to extend the cantilever above the offshore platform; and
wherein the remote well-processing device is configured to perform at least a first of the one or more well-processing tasks when positioned on said offshore platform at a position displaced from the one or more well centres defined by the mobile offshore drilling unit; and
wherein the mobile offshore drilling unit and the remote well-processing device are configured to be operationally coupled to each other when the remote well-processing device is positioned on said offshore platform; and
wherein the mobile offshore drilling unit is configured to assist in two or more of the well-processing tasks performed concurrently on respective wells, including the at least first well processing task performed by the remote well-processing device placed on the offshore platform at a position displaced from the one or more well centres and displaced from any cantilever of the mobile offshore drilling unit on a first of the one or more wells and a second of the one or more well-processing tasks concurrently performed by the primary drilling rig on a second of the one or more wells.
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Accused Products
Abstract
An offshore well-processing system includes a mobile offshore drilling unit and a remote well-processing device configured to be positioned on an offshore platform different from the mobile offshore drilling unit, the mobile offshore drilling unit defining at least one well center and comprising at least one primary drill rig including at least one drill floor and at least one hoisting system for raising and lowering tubular equipment through the at least one well center from/into a well in the seafloor. The mobile offshore drilling unit and the remote well-processing device are configured to be operationally coupled to each other; and the mobile offshore drilling unit is configured to assist in performing concurrent well-processing tasks on respective wells, including the first well processing task performed by the remote well-processing device on a first well and a second well-processing task concurrently performed by the offshore well-processing system on a second well.
28 Citations
25 Claims
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1. An offshore well-processing system for performing one or more well-processing tasks on one or more wells in the seafloor of an off-shore oil or gas reservoir, the system comprising:
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a mobile offshore drilling unit and a remote well-processing device configured to be positioned on an offshore platform different from the mobile offshore drilling unit, the mobile offshore drilling unit defining one or more well centres and comprising at least one primary drill rig comprising at least one drill floor and at least one hoisting system for raising and lowering tubular equipment through one of said one or more well centres, wherein the mobile offshore drilling unit is a jack-up platform comprising a cantilever supporting said primary drill rig and configured to extend the cantilever above the offshore platform; and wherein the remote well-processing device is configured to perform at least a first of the one or more well-processing tasks when positioned on said offshore platform at a position displaced from the one or more well centres defined by the mobile offshore drilling unit; and wherein the mobile offshore drilling unit and the remote well-processing device are configured to be operationally coupled to each other when the remote well-processing device is positioned on said offshore platform; and wherein the mobile offshore drilling unit is configured to assist in two or more of the well-processing tasks performed concurrently on respective wells, including the at least first well processing task performed by the remote well-processing device placed on the offshore platform at a position displaced from the one or more well centres and displaced from any cantilever of the mobile offshore drilling unit on a first of the one or more wells and a second of the one or more well-processing tasks concurrently performed by the primary drilling rig on a second of the one or more wells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of performing a plurality of well-processing tasks on a plurality of wells in the seafloor of an offshore oil or gas reservoir, the method comprising:
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positioning a mobile offshore drilling unit in a proximity of an offshore platform different from the mobile offshore drilling unit and located above the plurality of wells, the mobile offshore drilling unit defining one or more well centres and comprising a primary drill rig comprising a drill floor and a hoisting system for raising and lowering tubular equipment from/into at least one of the plurality of wells in the seafloor via one of said one or more well centres, wherein the mobile offshore drilling unit is a jack-up platform comprising a cantilever supporting said primary drill rig and configured to extend the cantilever above the offshore platform; providing a remote well-processing device positioned on said offshore platform different from the mobile offshore drilling unit at a position displaced from the one or more well centres defined by the mobile offshore drilling unit; operationally coupling the remote well-processing device to the mobile offshore drilling unit; performing, by the remote well-processing device positioned on the offshore platform displaced from the one or more well centres defined by the mobile offshore drilling unit and away from any cantilever of the mobile offshore drilling unit, the first well-processing task on the first well, assisted by the mobile offshore drilling unit via said operational coupling; and concurrently performing the second well-processing task on the second well, wherein the second well-processing task is performed by the mobile offshore drilling unit or by the primary drilling rig of the mobile offshore drilling unit. - View Dependent Claims (19, 20, 21, 22)
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23. A mobile offshore drilling unit defining one or more well centres and comprising a primary drill rig comprising:
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a drill floor and a hoisting system for raising and lowering tubular equipment through one of the one or more well centres defined by the mobile offshore drilling unit; wherein the mobile offshore drilling unit is a jack-up platform comprising a cantilever supporting said primary drill rig and configured to extend the cantilever supporting said primary drill rig and configured to extend the cantilever above an offshore platform different from the mobile offshore drilling unit; wherein the mobile offshore drilling unit is configured to establish an operational coupling with a remote well-processing device positioned on the offshore platform and at a position different from the well centre defined by the mobile offshore drilling unit and away from any cantilever of the mobile offshore drilling unit; and
to assist in performing two or more concurrent well-processing tasks performed on respective wells of an offshore oil or gas reservoir;wherein at least a first one of said well-processing tasks is performed by said remote well-processing device and a second one of said well-processing tasks is performed by said primary drilling rig. - View Dependent Claims (24, 25)
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Specification