POLY-PLUS 2000 Liquid Clay Inhibitor | SLB


Liquid clay inhibitor

Amber liquid.

POLY-PLUS 2000 liquid clay inhibitor is a multifunctional synthetic copolymer developed for use in freshwater-, potassium-, and saltwater-based drilling fluids. Water-free dispersion has excellent freeze or thaw stability and is not subject to phase separation or premature activation inside the pail or drum.

This inhibitor provides the same benefits as POLY-PLUS high-molecular-weight liquid clay inhibitor but at lower concentration.

  • Viscosity: This inhibitor is a cost-effective viscosifier in low-salinity fluids. Its shear-thinning properties maximize penetration rates at the bit under high shear rates and exhibit excellent hole-cleaning characteristics under low shear rates. It also allows for easy solids deposition in settling pits.
  • Shale stabilization and inhibition: POLY-PLUS 2000 inhibitor can be used alone or in conjunction with KCl to stabilize active shales. It protects by encapsulating reactive shales, forming a protective coating on the wellbore and around cuttings. Coating reduces the shale’s tendency to absorb water, swell, and slough.
  • Foam stabilization: The long-chain polymer of this inhibitor creates a tighter, stronger foam, which improves the fluid’s cuttings carrying capacity.
  • Flowline flocculant: Small concentrations of the inhibitor (.01 to 0.05 lb/bbl [0.028 to 0.14 kg/m3) economically flocculate drill solids. Additions should be made at the flowline to optimize settling time of drill solids in the pits.
  • Friction reduction lubrication: The inhibitor’s shear-thinning properties reduce power losses at points of high shear, especially at the drill bit and at other restrictions, such as the pump discharge, drill collars. The polymer structure also helps reduce turbulence, which reduces erosion and the likelihood of washouts in weak formations.
Person in coveralls and hard hat standing in front of drilling rig.

POLY-PLUS 2000 inhibitor conforms to NSF/ANSI 60.

Typical Physical Properties
Physical appearance
White liquid dispersion
Slightly hydrocarbon
Viscosity (typical)
200–500 cP
Specific gravity
pH (1% solution)
Flash point
248 degF [120 degC]