Complex sentence: The drilling fluids flow directly into the shale shaker after it returns to the surface of the well, and it is the first stage of solids control system, and the solids with diameter above 75μm can be separated first by the shale shaker.
Split into simpler sentences: The drilling fluids flow directly into the shale shaker after it returns to the surface of the well. The solids with a diameter above 75μm can be separated first by the shale shaker.