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US 5,706,897 AGranted
Drilling, production, test, and oil storage caisson
AssigneeDeep Oil Technology, Inc.
InventorEdward E. Horton, III
Life of this patent
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AssigneeDeep Oil Technology, Inc.
InventorEdward E. Horton, III
Estimating the term…
A drilling, production, test, and oil storage caisson for use in deep water offshore well operations. Separate low pressure and high pressure drilling risers are independently supported on buoyancy modules. Multiple drilling and production risers are left in the water and connected to the drilling rig and well(s) as needed to prevent the need for the raising and lowering of different risers during the various steps involved in beginning and completing wells. Surface and lower BOP stacks are utilized. Means for controlling the accelerations and velocity of the drilling riser buoyancy modules in the event of riser failure is provided. A subsea tree with dual master valves allows for production directly through a vertical production riser, flowline, to the production manifold on the caisson. A twisted tubing production riser is formed from three strings of tubing that are used for the flowline, annulus, and conduit for control lines.
In a drilling, production, test, and oil storage caisson for use in deep water offshore well operations wherein a drilling or production riser extends down to the seafloor and is attached to a wellhead, with said drilling riser designed to receive a drill string therethrough, said caisson being self buoyant such that a portion of the caisson extends above the water surface, the caisson being held in position by mooring lines, and the caisson having a drilling rig positioned on the upper end of said caisson so as to be moveable laterally relative to said caisson, the combination of:
In a drilling, production, test, or oil storage caisson for use in deep water offshore well operations wherein a drilling or production riser extends down to the seafloor and is attached to a wellhead, with said drilling riser designed to receive a drill string therethrough, said caisson being self buoyant such that a portion of the caisson extends above the water surface, the caisson being held in position by mooring lines, and the caisson having a drilling rig positioned on the upper end of said caisson so as to be moveable laterally relative to said caisson, the combination of:
In a drilling, production, test, and oil storage caisson for use in deep water offshore well operations wherein a drilling or production riser extends down to the seafloor and is attached to a wellhead, with said drilling riser designed to receive a drill string therethrough, said caisson being self buoyant such that a portion of the caisson extends above the water surface, the caisson being held in position by mooring lines, and the caisson having a drilling rig positioned on the upper end of said caisson so as to be moveable laterally relative to said caisson, the combination of:
In an offshore structure designed to drill for and produce hydrocarbons, a twisted tubing production riser, comprising:
Dependencies are inferred from the claim text.