Definition(s)
Pressure-Down Rate (Rpd)
Rate at which pressure is reduced from the bottom-hole pressure, pBH, to the pressure at the top of cement column, pTOC, during a thickening-time test.
Source: API RP 10B-2, Recommended Practice for Testing Well Cements, First Edition, July 2005 (Reaffirmed: July 2010). Global Standards