A subsea return fluid recovery system for recovering drilling fluid and
cuttings ("return fluid") from a subsea wellbore in one embodiment
includes a hub at the opening of the subsea wellbore that directs fluid
into a transport device. In one embodiment, the hub includes a stand pipe
that forms a return fluid column, the hydrostatic pressure of which
causes return fluid to flow into the transport device rather than up the
stand pipe. One or more buoyant members attached to the transport device
convey the transport device toward the surface. A preferred recovery
method includes collecting return fluid at the seabed, passively
transporting the collected fluid to the surface, and processing the
collected fluid at a local (offshore) or land based treatment facility.
The retrieval and processing of the return fluid is done outside the
critical path of the drilling activities at an offshore platform.