Patent ID: 6530482
Filing Date: 2003-03-11
Classification: B01D,B07B

Abstract:
A shale shaker comprising:a base; at least one upper shaker screen; at least one lower shaker screen; a basket mounted movably with respect to and on the base; wherein the at least one upper and lower shaker screens are releasably mounted on the basket and the at least one lower screen is mounted at a level below a level of the at least one upper shaker screen and underlying the at least one upper shaker screen; at least one distribution conduit; a flowback pan disposed between the at least one upper shaker screen and the at least one lower shaker screen, the flowback pan overlying at least a portion of the at least one lower shaker screen for preventing at least a portion of the screened material falling through the at least one upper shaker screen from contacting the at least one lower shaker screen and for directing said screened material to the at least one distribution conduit; a flow director for selectively directing screened material flowing through the at least one distribution conduit (a) to the at least one lower shaker screen or (b) away from the at least one lower shaker screen; and a distribution apparatus for selectively directing unscreened material to the at least one lower shaker screen.