PPT 1
PPT 1 :
(1) (n.) Drilling Fluids. A test performed in a specialized filtration-type apparatus (particle-plugging apparatus) to determine the effectiveness of additives to prevent fluid loss into a permeable medium. Alt. form: particle-plugging test. See: Sintered. (2) (n.) Drilling Fluids. A laboratory test used to determine if a drilling fluid blocks movement of filtrate through pore spaces of a shale sample. The PPT device monitors the increase in pore pressure in a shale when exposed to a drilling fluid over a period of time. Shale cores from 1 to 3-inches long are fitted into a modified Hassler cell that has sensitive pressure transducers in reservoirs on each end of the cell. Alt. form: pore-pressure transmission. See: Pore Pressure
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