ME-XC 150

AMPS-Grafted Modified Xanthan Gum Suspension Agent for WBM

ME-XC150 meets API standard. It is AMPS-grafted modified xanthan gum (AMPS-g-XG). Using ammonium persulfate (APS) as initiator, AMPS monomer is grafted onto the xanthan-gum backbone through free-radical graft polymerization.

This proprietary grafting process delivers enhanced thermal stability. The product performs in most water sources regardless of salinity or hardness. ME-XC150 delivers outstanding suspension and shear-thinning properties, rated for service up to 320 °F. It acts as the primary suspension agent for the HARSHDRIL® high-performance WBM system. Biocide addition is recommended to avoid microbial fermentation.

At mud pH above 10.0, ME-XC150 becomes more sensitive to soluble calcium and may precipitate out of solution. To achieve balanced fluid-loss control and rheology, tailor formulations for target mud density and temperature by combining complementary products including ME-VIS HT® and ME-DRIST D POLYMER.

Lower viscosity degradation under high-temperature aging:

1 % loading conventional XG: viscosity decline 70.1 % @150 °C, 80.1 % @180 °C

1 % loading ME-XC150: viscosity decline 46.8 % @150 °C, 58.8 % @180 °C

Distinct high-temperature shear-thinning performance; viscosity drops sharply within shear-rate range 5–100 s⁻¹, then decreases slightly up to 800 s⁻¹

API compliant, with stable rheology after 150 °C / 16 h hot-rolling aging