Depulsators before Oil & Gas Field Plants and Equations for Calculating the Main Element of Depulsators, Venturi Nozzles

Pipe depulsators are preliminary gas separation devices (PGSD). Professor E.P. Zaporozhets, the author, developed alternative depulsators – Autonomous Venturi nozzles (AVN) and depulsators-distributors of flows (FDD) with a Venturi nozzle (VN) at the entrance. There is a new method of selecting depulsators of new generation on the basis of Venturi nozzle. This method allows selection of Venturi nozzle neck diameter that does not allow overflow of separators. The main size of Venturi nozzle is the diameter (reduced diameter) of the Venturi nozzle critical section. The article presents refined system of equations to determine VN geometric parameters and equation to calculate the area of Venturi nozzle critical section. Speed of liquid and gas in critical section should be no more than 20 m/sec, 320 m/sec respectively. AVN depulsators can be installed a few kilometres from the plant. AVN depulsators are more compact, PGSD are smaller in size, length and height. Depulsators of any type are installed before oil&gas plants, mainly before inlet separators. Depulsators are installed in Western Siberia and Krasnodar region and are recommended at marine oil & gas platforms.