METHOD OF OIL WITHDRAWAL FROM HIGH GAS CONTENT WELL AND ELECTROLOADING EQUIPMENT FOR IT Russian patent published in 2010 - IPC E21B43/00 F04D15/00 

FIELD: oil-and-gas industry.

SUBSTANCE: descend an assembly into borehole at a defined depth, which includes a centrifugal pump (CP) and a submersible asynchronous motor (SAM).Set up current frequency f_s, feeding SAM, in a range f_s=(0.74-0.78)f, start up SAM, extract a damping fluid from a production string (PS) until dynamic level. After the SAM descending pump compressed inert gas in to the bottomhole clearance. At that control dynamic level with a frequency (4-6) times per hour. Bleed the bottomhole clearance inert gas into a oil collector system with a rate of overburden pressure depression (2-4) at/hour and limit the current value, feeding SAM till a nominal one. At that keeps the mentioned value simultaneously changing current frequency inversely to the current variation value. Also in side of the PS a tubing string located, equipped with CP in its bottom part. SAM stiffly connected to the CP shaft. PS wellhead connected with a tubing system via shut off valve and fitting, and via the second shut off valve and a return valve - with a nipple chamber and oil collector. A sonic depth finder installed on the wellhead fitting for identification of dynamic level current value. A control station installed on the well surface, which includes a frequency converter, connected via transformer, a power cable, equipped with a high temperature cable cover, to the SAM, controller connected with its output through PI regulator to the frequency convector driving port, and with input - to a remote sensing submersible block.

EFFECT: light hydrocarbons with a high content of associated gas extraction assembly operation regime stability increase.

2 cl, 2 dwg