METHOD AND DEVICE TO TREAT BOREHOLE WITH FLUID MEDIUM (VERSIONS) Russian patent published in 2013 - IPC E21B43/26 

Abstract RU 2492318 C2

FIELD: oil and gas industry.

SUBSTANCE: method of treatment includes the following stages: deployment of multiple sliding couplings on a flow string in an annular space of the borehole, besides, multiple sliding couplings include at least the first sliding coupling and at least one second sliding coupling; opening of the first sliding coupling for supply of fluid medium pressure from the flow string into the annular space of the borehole by drop of the first plug downwards along the flow string and pumping of the fluid medium under pressure in the flow string; and opening of at least one second sliding coupling, at least by fluid medium pressure supplied into the annular space from the opened first sliding coupling, by application of the specified pressure of the fluid medium in the annular space of the borehole relative to the pressure chamber on at least one second sliding coupling.

EFFECT: higher reliability and manufacturability of applied facilities for treatment of multiple well zones.

29 cl, 17 dwg

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RU 2 492 318 C2

Authors

Zimmerman Patrik Dzh.

Uord Dehvid

Garsija Sezar G.

Dates

2013-09-10Published

2011-09-07Filed