CUTOFF VALVE Russian patent published in 2013 - IPC E21B34/16 

FIELD: oil and gas industry.

SUBSTANCE: cutoff valve consists of a body connected to a pipeline by means of a flange connection, a thread, a quick-detachable connection, a bayonet connection; a seat of the valve in the form of plane, a cone from elastic material or that combined with metal, plastic; a shutoff element in the form of a ball, a plate; a conical or a flattened cylindrical multi-sided prism from material with density that is higher than that of oil or oil products and lower than water density or in combination with light-alloy material; a guide and a cell from metal, elastic plastic or their combination with a thrust against the housing on elastic surface, which is spring-loaded, or their combination. In the tank on the suction line of individual liquid pumping-out pipelines there installed are at least two cutoff valves at different levels. Besides, on individual liquid pumping-out pipelines there installed are liquid pressure sensors, which are electrically connected to a pumping-out control automation system.

EFFECT: improving reliability of separation of two-phase liquids; simplifying the design.

2 dwg