A containment system for recovering hydrocarbon fluid from a leaking device comprising a wall extending from a base level to a first level for surrounding the leaking device, and a dome situated above the wall and forming a cavity for accumulating hydrocarbon fluid. The dome comprises an upper output opening for extracting the hydrocarbon fluid. The containment system further comprises a lower output opening extending up to a dome level. The wall and the dome are independent members so as the wall can be landed on the seafloor before the dome is installed.

A containment unit for containing fluid leaks in an ambient liquid. The containment unit comprises a weighted base for being disposed around the fluid leak. The weighted base is positioned on top of one or more suction piles. Further, the containment unit comprises a curtain unit coupled to the weighted base. The curtain unit comprises a helical spring and facilitates containing the fluid leak in the ambient fluid. The containment unit further comprises a flotation unit coupled to the curtain unit. The containment unit also comprises thrust roller bearings to allow rotation of the curtain unit with respect to the weighted base and the flotation unit. The invention further discloses a containment system comprising multiple containment units as needed depending on the depth of ambient liquid and a surface flotation unit comprising pumps, sensors and skimming units to allow for the fluid leaked to be transferred to a vessel.