Modular device for liquid/liquid gravity separation

摘要

A modular liquid/liquid gravity separation device for separating the aqueous phase and the oil phase of a crude oil at the sea bottom. The device has a plurality of separation modules coupled to a common manifold device. Each separation module has a fluid delivery pipe coupled to at least one gravity separation pipe by a tubular bend device. The common manifold device has a first tank fed with crude oil by a feed pipe resting on the sea bottom via a first inlet orifice, a plurality of first outlet orifices feeding crude oil to said delivery pipes. The aqueous and oil phases are separated within the separation pipes before being delivered into a second tank via second inlet orifices of the second tank to which the separation pipes are coupled. The oil phase is conveyed to the surface from the second tank via a first removal pipe. The aqueous phase is conveyed to the sea bottom.

主权项

1. A modular device for liquid/liquid gravity separation of two liquid phases of different densities from a liquid fluid, more preferably the aqueous phase and the oil phase of a crude oil, said modular separation device resting on the sea bottom, wherein the device comprises:
a) at least one separation module, each said separation module being supported by at least a first base resting on the sea bottom, said first base being anchored to the sea bottom by being fastened on an anchor, each separation module comprising:
a.1) a fluid delivery pipe extending in an axial longitudinal direction X1X1; anda.2) at least one gravity separation pipe extending in rectilinear manner in an axial longitudinal direction X2X2, and arranged in such a manner that:
a first end of said delivery pipe is connected to at least one first end of at least one separation pipe; andthe second end of said delivery pipe is connected to a first outlet orifice of a first cylindrical manifold tank, said second end of each separation pipe being connected to a second inlet orifice of a second cylindrical manifold tank; anda.3) a tubular bend device suitable for enabling said fluid to be transferred between said first end of said delivery pipe and each said first end of each said separation pipe of said separation module; and b) a common manifold device supported by a second base resting on the sea bottom, said second base being anchored to the sea bottom by being fastened on an anchor, said common manifold device having a first support structure supported by said second base and supporting:
b.1) said first cylindrical manifold tank comprising:at least one first inlet orifice, said first inlet orifice being connected, or configured for connection, to an undersea feed pipe resting on the sea bottom feeding or for feeding said first cylindrical manifold tank with said fluid; anda plurality of said first outlet orifices, each said first outlet orifice including or co-operating with a first closure valve, at least one said first outlet orifice being connected to a respective said second end of said delivery pipe, said first outlet orifices being arranged side by side in the longitudinal axial direction Y1Y1 of said first tank; andb.2) said second cylindrical manifold tank comprising:a plurality of second inlet orifices, each said second inlet orifice including or co-operating with a second closure valve, at least one said second inlet orifice being connected to a respective said second end of a separation pipe, said second inlet orifices being arranged side by side in the axial longitudinal direction Y2Y2 of said second tank;at least one upper second outlet orifice co-operating with a first export pump connected, or configured for connection, to a first removal pipe; andat least one lower second outlet orifice comprising or co-operating with a second export pump connected or for connection to a second removal pipe.