High-Performance Hydroxyethyl Cellulose (HEC) for Water-Based Drilling Fluids 1. Company Profile Shanghai Prior Chemical Scientific And Technical Co., Ltd. (Grade A Tax Credit) was founded in 2016 and specializes in the international trade and distribution of industrial chemicals. With access to resources associated with China North Industries Group Corporation (NORINCO GROUP), the company offers a diverse range of cellulose e-t-h-e-r-s and specialty chemical materials,