API 13B-1 : 2009 : INC : ERR 1 : 2014 : R2016

API Foreword
Foreword
Introduction
1 Scope
2 Terms and definitions
3 Symbols and abbreviated terms
   3.1 Symbols
   3.2 Abbreviations
4 Drilling fluid density (mud weight)
   4.1 Principle
   4.2 Apparatus
   4.3 Procedure
   4.4 Calculation
5 Alternative drilling fluid density method
   5.1 Principle
   5.2 Apparatus
   5.3 Procedure
   5.4 Calculation
6 Viscosity and gel strength
   6.1 Principle
   6.2 Determination of viscosity using the Marsh funnel
   6.3 Determination of viscosity and/or gel strength using
        a direct-indicating viscometer
7 Filtration
   7.1 Principle
   7.2 Low-temperature/low-pressure test
   7.3 High-temperature/high-pressure (HTHP) test
8 Water, oil and solids contents
   8.1 Principle
   8.2 Apparatus
   8.3 Procedure
   8.4 Calculation
9 Sand content
   9.1 Principle
   9.2 Apparatus
   9.3 Procedure
10 Methylene blue capacity
   10.1 Principle
   10.2 Reagents and apparatus
   10.3 Procedure
   10.4 Calculation
11 pH
   11.1 Principle
   11.2 Reagents and apparatus
   11.3 Procedure for pH measurement
   11.4 Care of electrode
12 Alkalinity and lime content
   12.1 Principle
   12.2 Reagents and apparatus
   12.3 Procedure - Phenolphthalein and methyl orange
        filtrate alkalinities
   12.4 Procedure - Phenolphthalein drilling fluid alkalinity
   12.5 Calculation of ion concentrations from P[f] and M[f]
   12.6 Estimation of lime content
13 Chloride ion content
   13.1 Principle
   13.2 Reagents and apparatus
   13.3 Procedure
   13.4 Calculation
14 Total hardness as calcium
   14.1 Principle
   14.2 Reagents and apparatus
   14.3 Procedure
   14.4 Calculation
Annex A (informative) - Chemical analysis of water-based
        drilling fluids
Annex B (informative) - Shear strength measurement using
        shearometer tube
Annex C (informative) - Resistivity
Annex D (informative) - Removal of air or gas prior to testing
Annex E (informative) - Drill pipe corrosion ring coupon
Annex F (informative) - Sampling, inspection and rejection
Annex G (informative) - Rig-site sampling
Annex H (informative) - Calibration and verification of glassware,
        thermometers, viscometers, retort-kit cup and
        drilling fluid balances
Annex I (normative) - High-temperature/high-pressure filtration
        testing of water-based drilling fluids using the
        permeability-plugging apparatus and cells
        equipped with set-screw-secured end caps
Annex J (normative) - High-temperature/high-pressure filtration
        testing of water-based drilling fluids using the
        permeability-plugging apparatus and cells
        equipped with threaded end caps
Annex K (informative) - Water-based drilling fluids report form
Bibliography

Describes 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.