API RP 13B-1-ed.5

Annotation of standard text API RP 13B-1-ed.5 :

API RP 13B-1, 5th Edition, January 2023 - Field Testing Water-based Drilling Fluids

This recommended practice 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;

k) low-gravity solids and weighting material concentrations.

Annexes A through K provide additional test methods that 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, timers, viscometers, retort cup, and drilling fluid balances;

— permeability plugging testing at high temperature and high pressure for two types of equipment;

— Sag testing.