API SPEC 13A-2010 Specification for Drilling Fluids Materials (EIGHTEENTH EDITION; Effective August 1@ 2010; Incorporates ERTA 1: August 2014; ERTA 2: May 2015; ERTA 3: July 2015; ERTA 4: OCTOBER 2016)
This International Standard covers physical properties and test procedures for materials manufactured for use in oil- and gas-well drilling fluids. The materials covered are 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)@ drilling-grade Xanthan gum@ and barite 4@1. This International Standard is intended for the use of manufacturers of named products.