PROCEDURE FOR EXTRACTION OF RESERVOIR DEGASSED FLUID Russian patent published in 2011 - IPC F04F1/08 

FIELD: oil and gas production.

SUBSTANCE: procedure consists in lifting fluid with pumps. Continuous flow of fluid is created by alternating cycles of reception and replacement in working chambers of interchangeable two-chamber well pumps of replacing connected with pipelines of produced fluid, pipes of withdrawal of spent gas and with a cable of electric current. For this purpose there is raised pressure in sealed annular space. Static level of fluid in it is dropped to a level below placement of a lower step of the well pump of replacing due to difference between built-up pressure in annular space of the well and pressure in the pipeline for exhaust of spent gas connected to atmosphere and with one of a working chambers of the pump of a lower step of the installation. Further, fluid is received, while replacement of produced fluid from another chamber of all pumps through the pipeline to the pumps of upper steps is performed due to intake of compressed gas from annular space. Fluid is received with working chambers of pumps positioned higher owing to replacement of fluid from the working chambers of the pumps positioned lower.

EFFECT: extraction of de-gassed fluid with mechanic impurities from shallow and big depth and from wells of low yield.

7 dwg