METHOD OF INCREASING OIL WITHDRAWAL AND FACILITY FOR IMPLEMENTATION OF THIS METHOD Russian patent published in 2009 - IPC E21B43/16 E21B43/24 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil and gas industry and can be implemented for increasing rate of flow of low-producing wells and for development of oil reservoirs with high viscous oil. The method consists in simultaneous vibrating and heat effect onto the bottomhole zone of a bed. Ultrasonic radiation is directed from the above surface part of the well inside the well along oil-well tubing, along the rod of a well pump and along an immersed waveguide located in the oil well tubing and/or in a gap between the oil-well tubing and casing tubes. This effect is performed during extracting oil from well without well shutdown. The specific ultrasonic power supplied to the waveguides is chosen within limits from 0.1 to 10 kilowatts per square centimeter of waveguides cross section area. The facility for implementation of the method consists of an ultrasonic frequency electric oscillation generator and electromechanical converters. The electromechanical converters are made in form of tubular or solid or multilayer, or composite ultrasonic converters designed to be connected with oil-well tubing of wells, with the rod of the pump and with the immersed waveguide located in the oil well tubing and/or in a gap between the oil-well tubing and casing tubes. The converters are arranged successively one after another and/or parallel around them.

EFFECT: facilitating continuous and everyday influence on bed during oil extraction from well without well shutdown and also high efficiency of combined heat and ultra-sonic effect in perforated zone to intensify oil withdrawal and to increase permeability of bottomhole zone.

2 cl, 1 dwg, 1 tbl