This part of ISO 10414 provides standard procedures for determining the following characteristics of water-based drilling fluids: a) drilling fluid density (mud weight); b) viscosity and gel strength; c) filtration; d) water, oil and solids contents; e) sand content; f) methylene blue capacity; g) pH; h) alkalinity and lime content; i) chloride content; j) total hardness as calcium. Annexes A through K provide additional test methods which may be used for - chemical analysis for calcium, magnesium, calcium sulfate, sulfide, carbonate and potassium; - determination of shear strength; - determination of resistivity; - removal of air; - drill-pipe corrosion monitoring; - sampling, inspection and rejection; - rig-site sampling; - calibration and verification of glassware, thermometers, viscometers, retort-kit cup and drilling-fluid balances; - permeability-plugging testing at high temperature and high pressure for two types of equipment; - example of a report form for water-based drilling fluid.