drilling_fluid
1. [ noun ] a mixture of clays and chemicals and water; pumped down the drill pipe to lubricate and cool the drilling bit and to flush out the cuttings and to strengthen the sides of the hole
Synonyms: drilling_mud
Related terms: lubricant
Similar spelling:   drilling_mud
  drilling_rig
  drilling_bit
  drilling_pipe
  drilling_platform
  dry_walling