METHOD OF FLUID RECOVERY FROM WELL AND DEVICE FOR ITS EMBODIMENT Russian patent published in 2001 - IPC

FIELD: oil and gas producing industry, more specifically, intensification of fluid recovery by variation of fluid pressure in well. SUBSTANCE: method includes pimping of fluid into well. Supplied fluid is transformed by deep-well pump into high-velocity jet which entrains well fluid and transports mixture of fluids to wellhead. Installed at wellhead is vessel from which one part of fluid is transported into well and transformed by deep-well pump into circular jet directed upward at angle to axis of deep-well pump. Mixture of fluids is withdrawn from well into vessel. Excessive mixture is withdrawn from vessel into transportation line. Well operation under conditions of depression and repression is regulated by variation of fluid flow rate from vessel to well or by shutoff of vessel. Device for embodiment of claimed method has pump at wellhead, pipes for fluid transportation into well and withdrawal of fluid from well, deep-well pump an packer. Installed at wellhead is vessel with regulated fluid withdrawal from it or its shutoff. Pipes for fluid transportation into well and its recovery from well communicate vessel with pump and with well. Deep-well pump has circular channel with its axes positioned upward at angle of 0-90 deg to axis of deep-well pump. EFFECT: higher deep-well pump delivery in performance of not only auxiliary operations but fluid recover from well as well, both, in process of well completion and research, and in process of recovery of fluids, extended range of depression and repression values, increased stability of deep-well pump. 2 cl, 3 dwg