AUTOMATIC DEVICE FOR BYPASS OF ANNULAR GAS TO TUBING STRING Russian patent published in 2013 - IPC E21B34/06 

FIELD: oil and gas industry.

SUBSTANCE: device includes a housing, a check ball valve, a hydraulic channel with a central constriction, a string of pump rods, which is equipped with a flow diverter, which is located in annular space above level of well fluid. Besides, the device has a branch pipe in axial line of a hydraulic channel, which attaches the tubing cavity before the flow diverter and the check ball valve protected with a hinged cap against mechanical impurities and equipped with a travel limiter of the protective cap. The device is arranged in the housing fixed on the tubing string, to the walls of which a large base of an isosceles triangular stop is adjacent, with a flow diverter supported from it through a radial thrust bearing in the form of a cylindrical thickening having running fit to the housing walls. Besides, diameter of a circle drawn through the triangle vertex is larger than diameter of the pump screw.

EFFECT: improving reliability and efficiency of an automatic device for bypass of annular gas.

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