Method and apparatus to control fluid flow from subsea wells

摘要

The present invention is directed to methods and apparatus to construct subsea wells with redundant parallel fluid flow control systems to allow new methods to stop subsea blow outs. More specifically, this invention provides methods and apparatus to construct subsea wells with a plurality of redundant parallel paths allowing for the first time drill pipe and other intervention conduits, wire line, and fluids to be deployed below a damaged drilling riser and or a damaged blow out preventer through a separate blow out preventer and riser system presented in this invention.

主权项

1. A method of controlling the fluid flow from a subsea well, comprising:
connecting at least two separate subsea blowout apparatus above different proximal end branches of a subsea multi-path apparatus, wherein said multi-path apparatus comprises at least two proximal ends that define separate injection conduits converging to a common distal end; connecting above the respective proximal end of at least one of said at least two separate subsea blowout apparatus at least one riser conduit wherein said riser conduit has a proximal end at or near the surface; inserting at least one injection conduit having a proximal end at or near the surface into at least one of said riser conduit; pumping fluids from the surface into said subsea well through the at least one conduit having a proximal end at the surface and a distal end below the surface, wherein different fluids are injected down the separate injection conduits through the separate subsea blowout apparatuses with said pumping from surface of said fluids.