Spud mud

{
  "id": "MLC-T-OAG-003557",
  "term": "Spud mud",
  "field": "Oil and gas",
  "definition": "A high-viscosity drilling fluid used for the initial, shallow section of a wellbore. Its primary functions are to carry large cuttings generated by the top-hole bit and to seal unconsolidated surface formations, preventing fluid loss and hole collapse. This simple fluid, frequently a mix of bentonite clay and water, is later displaced by a more specialized mud system as drilling progresses into deeper geological zones.",
  "subject": "Drilling Fluids",
  "url": "https://mlchart.com/terminology/oil-and-gas/spud-mud/"
}