METHOD OF SELECTING ASSOCIATED PETROLEUM GAS AND COMPLEX OF UNITS FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and is intended to increase efficiency and reliability of mechanized extraction of carbonated oil fluids from wells by removing excess pressure of associated oil gas in annular space. Proposed method consists in pumping gas into field collector through side tap of well equipment. Gas extraction is performed by combination of constant gas pumping with its periodic replacement with process fluid. This fluid is accepted as compatible with production of well, which is supplied to annular space. Process fluid is fed at flow rate 25–30 % higher than that of process fluid flow and in volume required for 95–100 % of annular space. At the same time, supply of process fluid is taken in multiple steps exceeding that of submersible pump. Complex of units for implementation of the method comprises an assembly of a pump unit for pumping gas from the annular space. It is installed on field well header. Assembly for gas displacement from annular space consists of buffer tank for process fluid and pump interconnected by suction and delivery lines with buffer tank and annular space of well. There is pressure sensor installed in annular space. Assembly of pump unit for gas pumping is arranged in the form of jet pump. Its intake chamber is communicated with annular space of the well through side branch of well equipment.

EFFECT: higher well flow rate and capacity of well pump.

2 cl, 1 dwg