Surface pressure

{
  "id": "MLC-T-OAG-003700",
  "term": "Surface pressure",
  "field": "Oil and gas",
  "definition": "The pressure measured at the wellhead of a producing, injection, or shut-in well. For a flowing well, this is the tubing head pressure or casing head pressure, reflecting the force exerted by the fluid column and any applied backpressure. In a shut-in well, the surface pressure combined with the hydrostatic weight of the fluid column in the wellbore is used to estimate the bottomhole pressure.",
  "subject": "Well Testing",
  "url": "https://mlchart.com/terminology/oil-and-gas/surface-pressure/"
}