Drilling Fluids Additives

Drilling fluids, are used to aid the drilling of boreholes into the earth. Often used while drilling oil, gas and even water wells.
The three main categories of drilling fluids are:
water-based muds (WBs), which can be dispersed and non-dispersed; non-aqueous muds, usually called oil-based muds (OBs); and gaseous drilling fluid, in which a wide range of gases can be used.
Along with their formatives, these are used along with appropriate polymer and clay additives for drilling various oil and gas formations.
The main functions of drilling fluids include providing hydrostatic pressure to prevent formation fluids from entering into the well bore, keeping the drill bit cool and clean during drilling, carrying out drill cuttings, and suspending the drill cuttings while drilling is paused and when the drilling assembly is brought in and out of the hole.
The drilling fluid used for a particular job is selected to avoid formation damage and to limit corrosion.
The functions of the drilling fluids can be summarized;

  • Remove cuttings from well
  • Suspend and release cuttings
  • Control formation pressures
  • Seal permeable formations
  • Maintain wellbore stability
  • Minimizing formation damage
  • Cool, lubricate, and support the bit and drilling assembly
  • Transmit hydraulic energy to tools and bit
  • Ensure adequate formation evaluation
  • Control corrosion (in acceptable level)
  • Facilitate cementing and completion

Drilling Fluids Additives;