METHOD FOR UNDERWATER PRODUCTION OF HYDROCARBONS AND DEVICE FOR ITS REALISATION Russian patent published in 2013 - IPC E21B43/01 

FIELD: oil and gas industry.

SUBSTANCE: well is drilled on a sea bottom to an oil-bearing horizon, closed with a shell, and hydrocarbons are transported along the pipe to the surface. According to the invention, a process of forced controlled formation of gas hydrates is established. For this purpose oil containing gas is mixed with the necessary water amount from the surface in a cone, comprising facilities of mechanical mixing in the form of an impeller rotated by water that arrives via nozzles fixed at the impeller's level in the cone wall, until formation of gas hydrates. A mixture of products of gas hydrates destruction in the form of a gas-hydrate sludge - sand, water and oil - is transported to the surface. The casing pipe on the well head comprises a plug damaged by a signal. The shell is made in the form of a cone, the top of which is connected with a pipeline, and edges - with a ballast ring. Inside the cone on its axial line there is an impeller fixed, at the level of which along the ring in the cone wall there are controlled nozzles fixed, which have an angle to the cone tangent, providing for maximum speed of impeller rotation as water arrives from the surface.

EFFECT: reduced probability of clogging of a transport pipeline and delivery of hydrocarbons of any type, gas or liquid, with the help of one process complex from the bottom to the surface.

2 cl, 2 dwg