Separating collector for subsea blowouts

Hydraulic and earth engineering – Fluid control – treatment – or containment – Floatable matter containment

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Details

210923, 405210, E02B 1700, E02D 2300

Patent

active

044405235

ABSTRACT:
A collector apparatus and method for use with a blown-out seabottom wellhead comprising a plurality of collector elements each having an extended, open base and an upper portion enclosing a volume to receive fluid comprising gas and lesser quantities of oil rising, in the water, from the wellhead, and risers connected to the collector elements and extending thereabove to conduct fluid therefrom. One collector element is disposed below at least one other collector element with an open volume defined therebetween, the first element positioned to intercept fluid rising from the wellhead, and the second element positioned to receive and collect excess flow of fluid that is not collected by the first element. A riser extends from the first collector element to the surface of the sea, and a second riser extends from the second collector element to a storage tank above the second collector element. The first riser includes an adjustable valve adapted to restrict flow through the riser whereby only a portion of gas from the blown-out wellhead is allowed to flow through the first riser and a further portion of gas and oil are rejected by the first collector element and flow into the second collector element, and the second riser is adapted to conduct gas in a gas-lift pumping flow rate capable of carrying water and accompanying oil from the second collector element to the storage tank.

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