A SCREEN FOR USE IN A SHALE SHAKER AND METHOD FOR USING SAME

摘要

A screen assembly for a vibratory separator, the screen assembly comprising at least two ridge-valley series of screening material comprised of a plurality of alternating ridges and valleys of screening material, and at least one fl at area of screening material adjacent at least one of the ridge-valley series. According to another aspect of the invention, there is provided a screen assembly for a vibratory separator, the screen assembly comprising a ridge- valley series of undulating screening material comprised of a plurality of alternating ridges and valleys of screening material, each of said ridges having two spaced-apart ridge ends, a ridge top and a ridge bottom, and each ridge end comprising a portion of screening material that tapers down from i ts corresponding ridge's ridge top to a level of screening material at its correspoding ridge's ridge bottom.