Device for harnessing bittern burst of brine well by blasting

Abstract

This invention relates to a method for blast fathering the salt well bittern breakthrough, in addition to a device. The method comprises the following steps: a) sending the device having explosive, exposition packer and controlling device to the base rock section in the salt bed roof; b) igniting the device, destroying the well cementing tube and cement ring by the energy of explosion, forming the cylindrical cavity outwardly convex base rock exterior margin; the exposition packer will be expanded and fastened in the salt well, which can separating the lower cavity; c) pressure feeding cement to the cavity, making plugging base rock and fixed well layer integrated together, by which can cancel the bittern breakthrough absolutely. Said method can be also used in bittern breakthrough fathering of other liquid phase mine opening.

Description

Technical field: [0001] The invention relates to a method and a device for blocking brine wells and controlling brine channeling in salt wells. Background technique: [0002] At present, in the production of rock salt mining by drilling water solution in our country, brine is often encountered in salt wells. The main cause of brine channeling in salt wells is that the cementing quality defects such as cavities, honeycomb structures, and network cracks will be formed to varying degrees in the cement sheath during well completion. The cementing casing has been corroded by brine for many years, and under the action of ground pressure disturbance, etc., some cementing quality defect points or surfaces will be stressed, forming cracks, perforations and even fractures, resulting in casing isolation. The function of brine is invalid. The brine that gushes out through the casing damage point first enters the cement sheath, because the density, integrity and corrosion resistance of...

AI Technical Summary

Problems solved by technology

For this reason, methods such as plugging in salt wells, perforating plugging and cutting plugging have been proposed successively, because some of these methods do not involve destroying the cemented layer, some can only partially destroy the cemented layer, and some can destroy the cemented layer even in the radial direction. Cementing layer, but axially limited

However, in the undestroyed cementing layer, there will inevitably remain brine channeling channels that expand with time, or the plugging is too thin to keep the blocking channeling and sealing for a long time, resulting in treatment failure

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