GAS AND GAS CONDENSATE WELLS WITH LEAKY CASING STRING REPAIR METHOD Russian patent published in 2010 - IPC E21B33/13 

FIELD: oil-and-gas industry.

SUBSTANCE: execute well killing, lifting to the surface a tubing string together with well equipment, examination of the tubing string, a parker installation on the TS and its descending into the well. Fix the parker at the level under the casing string detected leakage interval. After that pump blocking composition into the hole clearance from the parker till level over the casing string leakage interval, the blocking composition later pressed in to cavity behind the casing string and into the reservoir with a displacement liquid, then keep the blocking composition under pressure during hardening period.

EFFECT: wells repair quality and the casing string leakage areas sealing reliability increase, also decrease well repair operation time consumption.

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