FIELD: oil industry. SUBSTANCE: apparatus has tank provided with oil bed, intermediate bed and water bed, inlet and outlet branch pipes, and pickups for determining thickness of the intermediate layer. The device for collecting and removing the intermediate bed is constructed as a flat hollow pipe provided with slots overlapped by shutters made up as rigid frames and corrugations. One of the faces of the pipe is open. The other face is connected with the electrically controlled gate through the pipe. The shutters are coupled with the reciprocating drive through the rigid tie. EFFECT: enhanced efficiency and decrease metal usage. 2 dwg
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