Floating platform well production apparatus
AssigneeVetco, Inc.
InventorPhilippe C. Nobileau
Life of this patent
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Abstract
A plurality of wells are clustered around a central riser which is maintained under tension from a floating platform. A plurality of spiders on the riser carry funnels in vertical alignment with the wells. The funnels are sufficiently large to permit the passage of wellhead connectors and master block valves, and the production risers include centralizers which brace the production riser from the funnels through a limited vertical range. Tensioning of the production riser is with a lower force and through a limited range which precludes disengagement of the centralizers from the funnel. Some centralizers are located to facilitate entry and attachment to the wellhead.
Claims12
A cluster well production apparatus for floating platform production comprising:
- a central large diameter riser having a vertical axis, a plurality of wellheads surrounding the vertical axis of said central riser;
- a plurality of spiders fastened to said central riser at selected elevations, a plurality of guide funnels on each spider secured in spaced relationship with said central riser and in axial alignment with said wellheads;
- a production riser running directly upwardly from each wellhead and passing through corresponding guide funnels, said production riser including a tubing string;
- the openings through said guide funnels being significantly larger than said tubing string;
- and centralizers attached to said production riser at elevations corresponding to at least some of the spider elevations and sized to be in closely-spaced relationship within said funnels.
Dependencies are inferred from the claim text.