Global Drilling Fluids and Chemicals Limited at its manufacturing Facility in Gujarat, India manufactures Bentonite used as a Viscosifier and Weighing material for Drilling applications . GDFCL manufactures Sodium Bentonite as per API 13 A Section 9, Section 10, Section 11 The various Grades of Bentonite manufactured by us are : GLO BEN 1000 : Sodium Bentonite as per API 13 A Section 9 also Known as API Grade Drilling Bentonite GLO BEN 2000 : Sodium Bentonite as Per API13 A Section 11 also Known as OCMA Bentonite GLO BEN 3000 : High Yeild Bentonite as per API 13 A Section 10 Also known as Wyoming Bentonite