首页> 外国专利> Equipment and method of maintaining or expanding of the inner diameter of wellbores, intended for the prevention of the backfilling sand filters clogging during their starting-up

Equipment and method of maintaining or expanding of the inner diameter of wellbores, intended for the prevention of the backfilling sand filters clogging during their starting-up

机译:保持或扩大井眼内径的设备和方法,旨在防止回填砂滤器启动时发生堵塞

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