Solving problems of well workovers using new technological solutions

Authors: V.A. Strizhnev, A.Yu. Presnyakov (RN-UfaNIPIneft LLC), O.A. Tyapov (RN-Purneftegaz LLC), V.I. Nikishov (Rosneft Oil Company OJSC)
The paper presents the trial results of using different technologies to isolate extensive casing leaks and to shut off overlying gas zones. Also two algorithms are described for approved schemes to choose the technology of casing leaks isolation and shutting off overlying or intermediate layers.

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