JET DEVICE FOR ANNULAR GAS BYPASSING Russian patent published in 2014 - IPC E21B43/12 F04F5/00 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used for annular gas bypassing to the flow string in wells operated by submersible electric-centrifugal pumps. Object of the invention is to improve operational reliability and efficiency of a submersible electric-centrifugal pump by increasing efficiency factor of the submersible electric-centrifugal pump unit. This object is solved by usage of a jet device for annular gas bypassing to the flow string which is installed upstream of the dynamic head and communicates the annular space with a cavity of the flow string through a return valve, at that the jet device for annular gas bypassing is made as two symmetric halves in the longitudinal section; one half is installed rigidly with the return valve while the other half can be moved longitudinally inside the flow string and connected through permanent magnets to the piston actuated by springs from below and placed in parallel to the axis of the flow string in a cylinder; the lower end of the cylinder communicates with the annular space while the upper one communicates with the flow string capacity.

EFFECT: reducing gas pressure in the annular space of the wells operated by submersible electrical-centrifugal pump units thus allowing increase in fluid level over the submersible electrical-centrifugal pump, increase in the well flow rate, preventing formation of hydrate block in the annular space, improving efficiency factor for submersible electrical-centrifugal pump units, reducing setting depth of the submersible electrical-centrifugal pump and consumption of the flow string, increasing overhaul life for submersible electrical-centrifugal pumps.

2 dwg