Patent ID: 7000777
Filing Date: 2006-02-21
Classification: B01D,B07B,B21F,B32B

Abstract:
1. A screen assembly for a shale shaker for treating drilling fluid with solids therein, the shale shaker having a basket for holding a screen assembly, a vibratory device for vibrating the basket and the screen assembly, and a lower receptacle for receiving drilling fluid passing through the screen assembly, the screen assembly comprising at least two screening members, each screening member having a surface area, the screen assembly having a top, the at least two screening members connected by sewing material, the screen assembly mountable on the basket so that solids separated from the drilling fluid are moved off the top of the screen assembly by motion imparted to the screen assembly by the vibratory device, the sewing material comprising thread in a stitch pattern across the at least two screening members, a pattern of expandable material on and corresponding to the stitch pattern, and the thread passing through holes in the pattern of expandable material, the expandable material expanded within the holes following extraction of a needle therefrom, the needle used to apply the sewing material, to inhibit tearing of either of the at least two screening members between holes.