As there are no active servers for legacy WGLauncher update protocol, in order to unpack this release,
follow this steps sequence:

1. Create an empty folder, e.g. C:\Games\World_of_Tanks\
2. Use any archive management application, like 7-Zip or WinRAR to extract these files into an empty folder you created in step 1:

WoT_internet_install_ru\wot_86.2718_client.patch
WoT_internet_install_ru\wot_86.2719_86.2718_client.patch
WoT_internet_install_ru\wot_86.277204_content_ru.patch

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It's not required to unpack wot_81.141_launcher.patch package as it contains only the launcher,
there aren't any required files to run World of Tanks to watch an old replay, for example.
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To check if you had extracted everything correctly, try running the game using WorldOfTanks.exe executable.
You should get at least to login screen upon game client restart (if you are running the game for the first time)