Polymers are used as extenders. Increase in the drilling fluid viscosity provides improvement in the removal of cuttings and better control of fluid densities and lubrication of the drilling bit. In addition, during down time, the cuttings will be held in suspension, thus, not causing problems with solids settlement.

Typical DMY polymers or PHPA's are used along or in conjunction with bentonite, as extenders, to increase the drilling mud viscosity thereby resulting in improvements in (1) the removal of cuttings (2) better control of mud densities and (3) lubrication of the drill bit. Additionally, during downtime, due to the thixotropic nature of the drilling mud system, the cuttings will be held in suspension, which thereby would not cause any major problems with solids settlement.

The WELLDONEMUD® series polymers with a wide range of viscosity modifiers are effective in both freshwater and saline brines including seawater. Offering higher viscosity buildup, meaning less dosage, and better stability in high salinity and temperature environment.