| 摘要 |
An apparatus 1 for determining undesirable solids in drilling fluid from screen underflow of a shale shaker screen comprises a wet sifting device 2 dressed with one, two or three single-layered square mesh screen panels, a positive displacement pump 3 with a stroke counter for drawing a fluid sample into the apparatus and a containment vessel 4 to collect the undesirable solids. The screen panels may comprise pre-tensioned mesh. The wet sifting devices preferably generate a circular, horizontal and spiral pattern of travel to discharge any oversized fraction retained by the mesh screen. A method for monitoring undesirable solids in a circulating drilling fluid comprises pumping a drilling fluid from below a shale shaker screen to the apparatus of the invention, weighing the solids discarded by the wet sifting device and measuring the volume of drilling fluid pumped to the apparatus. |
