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.