API RP 13B-1

Recommended Practice for Field Testing Water-based Drilling Fluids, Fourth Edition

ISO 10414-1:2008 (Identical), Petroleum and natural gas industries—Field testing of drilling fluids—Part 1: Water-based 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.

This edition of API 13B-1 is the identical national adoption of ISO 10414-1:2008, Petroleum and natural gas industries—Field testing of drilling fluids—Part 1: Water-based fluids.