METHOD OF SEPARATING INTER-TUBULAR SPACE OF COMPLICATED WELL AT LATER STAGE OF EXTRACTION OF OIL DEPOSITS Russian patent published in 2004 - IPC

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes preparation of place for mounting separator in well shaft, lowering pipe column into the well until it stops against pit-face with separator. Its compacting element is positioned in operating position by creating axial load by weight of pipe column. Force pumping of fluid into the bed is restarted as well as picking of product from in producing well. Before lowering of separator into the well research is performed to determine its impermeability, physical wear. Also determined is technical resource of operation column, as well as remaining oil volumes and on their basis time of operation of well before exhaustion of said volumes. If remaining oil volumes may be extracted in less than 5-10 years, and technical resource of operation column is less than this time, and in case, if wear of operation column is higher than normal and oil volumes may not be precisely measured, then as pipe column tubing pipes are used or additional column with inner diameter greater than outer diameter of tubing pipes. Before positioning of separator compacting member in operating position, inter-tubular space is filled with anticorrosion fluid.

EFFECT: safety of operation column, which remains intact to physical wear.

2 dwg