PPA

{
  "id": "MLC-T-OAG-002892",
  "term": "PPA",
  "field": "Oil and gas",
  "definition": "The abbreviation for the permeability plugging apparatus, also called the particle plugging apparatus, a high-pressure, high-temperature filtration cell fitted with a ceramic disk in place of filter paper. The disk stands in for permeable rock of a chosen pore throat size, and the test records spurt loss and filtrate volume over 30 minutes at an applied differential pressure. It shows how well sized bridging solids seal a formation, which a standard API filter press cannot do.",
  "subject": "Drilling Fluids",
  "url": "https://mlchart.com/terminology/oil-and-gas/ppa/"
}