Device for storage of tubulars, apparatus for handling tubulars and a method for disassembling a pipe string
First Claim
1. An apparatus for storing tubulars on a floating semi-submersible vessel, comprising a storage device for storing tubulars in a submerged position, essentially below a splash zone, whereinthe storage device is generally open to the surroundings so that the tubulars are externally exposed to surrounding water,the storage device is substantially vertically moveable relative to the floating vessel, andthe storage device is moveable on a track that is fastened to the floating vessel.
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Accused Products
Abstract
An apparatus for storing tubulars on a floating semi-submersible drilling or production vessel. The apparatus comprises a storage device for storing tubulars in a submerged position, essentially below a splash zone. The storage device is generally open to the surroundings so that the tubulars are externally exposed to surrounding water. It is also described an apparatus for transporting tubulars between a storage and a derrick on an offshore drilling and/or production platform having a platform deck. The apparatus is situated below the platform deck and is adapted for movement under the platform deck. A method for disassembling a pipe string is also described.
31 Citations
21 Claims
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1. An apparatus for storing tubulars on a floating semi-submersible vessel, comprising a storage device for storing tubulars in a submerged position, essentially below a splash zone, wherein
the storage device is generally open to the surroundings so that the tubulars are externally exposed to surrounding water, the storage device is substantially vertically moveable relative to the floating vessel, and the storage device is moveable on a track that is fastened to the floating vessel.
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13. An apparatus for storing tubulars on a floating semi-submersible vessel, comprising a storage device for storing tubulars in a submerged position, essentially below a splash zone, wherein the storage device is generally open to the surroundings so that the tubulars are externally exposed to surrounding water;
- and a retrieving apparatus for lifting tubulars from the storage device to a position close to or above a deck on the floating vessel, wherein the retrieving apparatus comprises a trolley equipped with grippers for gripping one or more tubulars, the trolley being moveable between a position close to or above the deck of the vessel to a position close to the storage device.
- View Dependent Claims (14, 15, 16)
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17. An apparatus for storing tubulars on a floating semi-submersible vessel, comprising a storage device for storing tubulars in a submerged position, essentially below a splash zone, wherein the storage device is generally open to the surroundings so that the tubulars are externally exposed to surrounding water;
- and a retrieving apparatus for lifting tubulars from the storage device to a position close to or above a deck on the floating vessel, wherein the retrieving apparatus is moveable in a horizontal plane by at least one traverser carriage.
- View Dependent Claims (18, 19, 20)
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21. Method for disassembling a pipe string on an offshore platform having a deck and a derrick, comprising:
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hanging off a lower part of the string at a level below the platform deck, disconnecting the string above the hang off level, moving the lower part of the string away from the drilling axis, bringing a retrieving apparatus into the drilling axis, transferring the upper part of the string to the retrieving apparatus, moving the retrieving apparatus and the upper part of the string away from the drilling axis, moving the lower part of the string into the drilling axis, lifting the lower part of the string into the derrick, repeating the previous steps until the string has been disassembled.
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Specification