Бурение нефтяных скважин!
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![[Нефтяники] Конструкция нефтяной скважины. Обсадные колонны нефтяной скважины.](https://sun9-74.userapi.com/impg/002IBtPj8IHCCX1qQxSkXY3W-UMnSpruIyAwOw/VXNG2T2w-bY.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=f3d319c40da1388d9d0ac6ba0b71410e&c_uniq_tag=mtjM3UNQ-RY3s-nPtl_slD_u5sdmOnhnr_gOxV-_tLw&type=video_thumb)
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