SYSTEM FOR IMPROVEMENT OF AIRLIFT EFFICIENCY AT PUMPING FORMATION FLUID FROM SUBSURFACE RESOURCES Russian patent published in 2015 - IPC E21B43/24 F04F1/20 

FIELD: oil and gas industry.

SUBSTANCE: system for pumping formation fluid from subsurface resources comprises at least two wells. Each of these wells is completed with two tubing strings coupled by channels of pressure communication. An injection well is intended for caldo injection through its one channel and for caldo decomposition initiating agent through its other channel with potential heating of pressure communication channels by products of exothermal reaction and for oil oxidation in the formation. A producing well is intended to control oil oxidation in the formation against output of carbon dioxide. Besides in the injecting well there are tools intended for stoppage of exothermal reaction and air bleeding through pressure communication channels with provided airlift and flowing of formation fluid in the producing well and potential control of pressure communication between wells, temperature, airlift power and operational safety. To this end in the ejecting well there is a packer set at outer production string, and inside inner production string there is a cable connecting pressure and temperature sensors mounted close to the packer and below it. In the producing well the above sensors are mounted at output from the production string and there is possibility to control composition of outgoing gas.

EFFECT: efficiency of airlift is improved and temperature and pressure monitoring is provided.

1 dwg