Floating offshore facility and a method for drilling a well
First Claim
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1. A floating offshore facility for offshore hydrocarbon production, wherein the offshore facility comprises:
- an upper deck and a lower deck,a well bay located on the lower deck, said well bay being composed of a plurality of drilling slots and a plurality of production slots surrounding said drilling slots, each production slot being adapted to receive a production riser after a well is completed at a drilling slot neighbour of said production slot, the plurality of drilling slots forming one opening inside the lower deck,a cart located between the upper and lower deck, said cart supporting a drilling riser and being movable together with said drilling riser inside said one opening of the plurality of the drilling slots, anda drilling rig located above the upper deck, said drilling rig being movable above the well bay so as to be positioned in alignment above the cart to allow to drill the well in using the drilling riser inside the drilling slot.
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Abstract
A floating offshore facility for offshore hydrocarbon production, comprising an upper deck, a lower deck, a well bay comprising a plurality of drilling slots and a plurality of production slots surrounding said drilling slots, a cart supporting a drilling riser and being movable together with said drilling riser inside the opening of the plurality of the drilling slots, and a drilling rig movable above the well bay to drill the well through the drilling riser.
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Citations
16 Claims
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1. A floating offshore facility for offshore hydrocarbon production, wherein the offshore facility comprises:
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an upper deck and a lower deck, a well bay located on the lower deck, said well bay being composed of a plurality of drilling slots and a plurality of production slots surrounding said drilling slots, each production slot being adapted to receive a production riser after a well is completed at a drilling slot neighbour of said production slot, the plurality of drilling slots forming one opening inside the lower deck, a cart located between the upper and lower deck, said cart supporting a drilling riser and being movable together with said drilling riser inside said one opening of the plurality of the drilling slots, and a drilling rig located above the upper deck, said drilling rig being movable above the well bay so as to be positioned in alignment above the cart to allow to drill the well in using the drilling riser inside the drilling slot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for drilling a well, wherein said method is implemented on a floating offshore facility for offshore hydrocarbon production, said offshore facility comprising:
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an upper deck and a lower deck, a well bay located on the lower deck, said well bay being composed of a plurality of drilling slots and a plurality of production slots surrounding said drilling slots, each production slot being adapted to receive a production riser after a well is completed at a drilling slot neighbour of said production slot, the plurality of drilling slots forming one opening inside the lower deck, a cart located between the upper and lower deck, said cart supporting a drilling riser and being movable together with said drilling riser inside said one opening of the plurality of the drilling slots, and a drilling rig located above the upper deck, said drilling rig being movable above the well bay so as to be positioned in alignment above the cart to allow to drill the well in using the drilling riser inside the drilling slot, and wherein the method comprises the following initial steps; moving the cart to a drilling slot, and positioning the drilling rig in alignment above the cart, and connecting the drilling riser to the well at the seafloor. - View Dependent Claims (14, 15, 16)
and wherein the initial steps and the above drilling steps are repeated with an other drilling slot for drilling an other well.
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15. The method according to claim 14, further comprising the following production steps after the disconnecting step:
- installing a production riser at a production slot that is a neighbour of the drilling slot and connecting said production riser to the well at the seafloor that is completed and ready for hydrocarbon production.
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16. The method according to claim 13, wherein the facility further comprises a blow out preventer device located inside the cart and connected above the drilling riser, and wherein during the initial steps of the method, moving the cart moves the drilling riser and the blow out preventer device together without disconnecting blow out preventer device from the drilling riser.
Specification