PROCEDURE FOR WELL SWABBING BY VISCOUS FLUID AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2015 - IPC E21B43/24 

FIELD: oil-and-gas industry.

SUBSTANCE: method of well swabbing by viscous fluid includes stages where: swab if preliminary run to the viscous fluid border with preset temperature 40°C minimum and 100°C maximum; swab is submersed under the viscous fluid level with preset speed 0.3m/s minimum and 1m/s maximum; power is directly supplied to the swab from surface equipment using the geophysical cable, then the power is supplied through the cable lug by means of the electric energy channel to the swab lower part; electric energy by means of the converter installed in the lower part of the swab is converted to the thermal electric energy and is transmitted under the viscous fluid level ensuring its local heating to temperature of the fluid liquefaction with simultaneous swab run; at that run speed and well fluid temperature are monitored during the entire swab run; in case of deviation of the swab run speed and temperature from the preset values the electric energy quantity supplied from the surface is changed; the viscous fluid sampling and lifting to surface are performed using the swab.

EFFECT: improved efficiency of development of high viscous oil or bitumen well by means of swabbing.

17 cl, 1 dwg