APPLICATION OF DEGRADABLE FIBERS IN SOLUTIONS OF INVERTED EMULSIONS FOR WELL KILLING Russian patent published in 2013 - IPC E21B43/12 C09K8/487 

FIELD: oil-and-gas industry.

SUBSTANCE: method of processing underground bed comprises injection of emulsion inverted solution in cased borehole cutting the bed to well killing. Said method comprises: oily continuous phase, nonoleaginous disperse phase and at least one bridging agent. formation contact with well killing solution and possibility for degradable material to degrade at least partially. Proposed method comprises: production of inverted emulsion for well killing including: oily continuous phase, nonoleaginous disperse phase and at least one bridging agent, injection of said solution in encased perforated borehole, production of filtration crust and its destruction to mallow the material to degrade. Proposed method comprises: production of inverted emulsion for well killing including: oily continuous phase, nonoleaginous disperse phase and at least one bridging agent. Placing the well killing solution in said borehole, formation of filtration crust and destruction of said crust whereat hydrolysis of degradable material destructs said crust.

EFFECT: higher efficiency, minimised bed damages.

25 cl, 2 tbl, 5 dwg