Application

In oil drilling industry,high-viscosity HEC is mainly used as viscosifier in well-completing finishing fluid; while low-viscosity HEC is mainly used as water loss controller. HEC used as a thickener will impart good mobility and stability to various slurries necessary for driling.completion, cementing and fracturing operations. In drilling. HEC can increase the sand carryingcapability of the slurry and extend the service life of drll bits in low-solid content completion fluid and​ cementing fluid, the excellent water loss control performance of HEC can prevent a large amount of water in the slurry from entering into the oill reservoir and enhancing the stabilizingcapability of the wall of the reservoir.