Abstract: The invention relates to a method and equipment to assist the flow of offshore production of hydrocarbon mixtures containing a high concentration of gas. A primary separating vessel is used and production is diverted to it. This vessel is designed to allow primary separate of the gas, which flows to the gathering center via a special line. Within the primary separating vessel there is a U-shaped length of pipe whose arms are connected to two flow lines which extend to the gathering center. A mechanical interface driven by high pressure gas periodically travels along these lines, carrying with it to the gathering center the volume of liquid phase which has accumulated in the lines. If liquid phase passes into the gas flow line, a mechanical interface can be passed along this line to remove the volume of liquid which has accumulated within it.

Abstract: This invention relates to a method and equipment to assist the flow of offshore oil production. At least three production flow lines are used, which are interconnected close to offshore well-heads or manifolds forming two U-shaped lengths of pipe acting as circuits for passage of the hydrocarbon mixture produced. A mechanical interface is periodically inserted into one flow line of the U-shaped branches of pipe and, driven by a volume of pressurized gas, travels along the one from among the two U-shaped pipe length to return to a gathering center. In its passage it pushes along the volume of hydrocarbon mixture which has accumulated in the flow lines.