GAS TIGHT SHALE SHAKER FOR ENHANCED DRILLING FLUID RECOVERY AND DRILLED SOLIDS WASHING

摘要

A gas tight shale shaker for enhanced drilling fluid recovery and drilledsolids washing. A process and apparatus for liquid phase-solid phaseseparation ofoil base drilling mud-containing drill cuttings is described including flowingthedrilling mud-containing drill cuttings over a vibrating screen bed to cause aleast aportion of the drilling mud to pass through the screen bed and the drillcuttings toremain on the screen bed. A diluent is added to the oil base drilling mudcontaining drill cuttings prior to flowing the drilling mud containing drillcuttingover the screen bed. The entire process is performed in a gas-tightenvironmentpreventing escape of diluent from the process into the external atmosphere andpreventing introduction of gases into the process from the externalatmosphere.