DIN EN ISO 13500:2011-04

This document describes physical properties and test procedures for materials manufactured for use in oil- and gas-well drilling fluids. The following materials are covered: barite, haematite, bentonite, nontreated bentonite, OCMA-grade bentonite, attapulgite, sepiolite, technical-grade low-viscosity carboxymethylcellulose (CMC-LVT), technical-grade high-viscosity carboxymethylcellulose (CMC-HVT), starch, low-viscosity polyanionic cellulose (PAC-LV), high-viscosity polyanionic cellulose (PAC-HV) and drilling-grade Xanthomonas campestris (Xanthan gum). This International Standard is intended for the use of manufacturers of named products. For Germany, Working Group NA 109-00-01-03 AK "Bohrspülung und Zemente - Spiegelausschuss zu ISO/TC 67/SC 3" ("Drilling and completion fluids, and well cements - Mirror Committee of ISO/TC 67/SC 3") of the Petroleum and Natural Gas Industries Standards Committee (NÖG) at DIN, the German Institute for Standardisation e. V., has collaborated in the preparation of this standard.