Polyanionic-cellulose filtration-control additive
Controls fluid loss in freshwater, seawater, potassium chloride, and salt muds.
High-molecular-weight liquid clay inhibitor
POLY-PLUS high-molecular-weight liquid clay inhibitor is an anionic liquid designed to provide cuttings encapsulation and shale stabilization. It also acts as a viscosifier, friction reducer, and flocculant.
POLY-PLUS inhibitor can be used in mud systems using makeup waters from freshwater to saltwater. It is also effective in salt muds, although slightly higher concentrations may be required compared with typical concentrations of 0.75 to 3 lb/bbl [2.1 to 8.5 kg/m3].
In clear-water, solids-free drilling fluids, POLY-PLUS inhibitor increases viscosity and enhances solids removal by flocculating the undesired solids. It also provides cuttings encapsulation and improved wellbore stability. This system is frequently used in slimhole, continuous-coring applications. Adding 0.5 to 1.75 lb/bbl [1.4 to 5 kg/m3] enhances solids removal by flocculating solids.
Low-solids, nondispersed (LSND) muds
POLY-PLUS inhibitor is well suited to LSND systems. In reduced-bentonite muds, the inhibitor serves as a bentonite extender to increase viscosity and as a flocculant to more efficiently remove drill solids. It also encapsulates cuttings and improves wellbore stability.
In weighted muds, this inhibitor provides cuttings encapsulation, improved wellbore stability, secondary viscosity, and improved filtercake integrity.
Viscous POLY-PLUS inhibitor sweeps are effective for periodic hole cleaning. Circulating a sweep through the well or borehole helps clear accumulated cuttings and maintain a clean hole.