METHOD FOR ISOLATION OF WATER INFLUX IN HORIZONTAL SHAFT OF PRODUCT WELL Russian patent published in 2005 - IPC

FIELD: oil extractive industry.

SUBSTANCE: method includes lowering a pipe column, pumping of high-viscous hydrophobic liquid into range, after lowering of pipe column with open latch at inter-pipe space whole hollow of horizontal shaft is filled with high-viscous hydrophobic liquid, then when closing said latch, said pumping is performed with amount of liquid 2-10 m³ of high-viscous hydrophobic liquid for one length meter of water influx range, and after that with open said latch isolating compound is pumped into well and positioned oppositely to water influx range, said latch is closed and isolating compound is pressed into water influx range by said liquid, while density of isolating compound is equal to density of high-viscous hydrophobic liquid or is different for no more than 60 kg/m³, and viscosity of hydrophobic liquid is equal to from 750 mPa to 2500 mPa with displacement speed of 2-600 s^-1. As isolating compound acid-soluble or easily drilled compound hardening in bed can be utilized.

EFFECT: higher efficiency.

1 ex, 2 cl