This article includes review of evolution of multistage fracturing completions for conventional oil reserves in continental Russia and focuses on attempts of the LLC "RN-Yuganskneftegaz", the one of the largest operator company in Russia, to solve the challenge of well life extension by implementing new completion technologies allowing reliable means of re-fracturing on the well after several years of service as well as the means to isolate gas or water break-through. A comparative analysis of different types of multistage fracturing completions was performed by LLC "RN-Yuganskneftegaz" with the aim to select the most suitable technology to address the above-mentioned goals without sacrifice of time required to drill, complete and stimulate the well. As the result of the analysis the technology of the frac valves activated by single-sized dissolvable balls was selected as a most appropriate. The successful field trial on 2 wells is described in this paper.