API RP 13B-2:2023+ADD 1:2025
Superseded
View Superseded by
Field Testing Nonaqueous-based Drilling Fluids
English
04-01-2025
10-24-2025
This recommended practice provides standard procedures for determining the following characteristics of nonaqueous drilling fluids (NADFs): a) drilling fluid density (mud weight); b) viscosity and gel strength; c) filtration; d) nonaqueous fluid (NAF), water, and solids concentrations; e) alkalinity, chloride concentration, and calcium concentration; f) electrical stability (ES); g) lime and calcium concentrations, calcium chloride, and sodium chloride concentrations; h) low-gravity solids and weighting material concentrations; i) sand content; j) high-temperature, high-pressure (HTHP) filtration using the permeability plugging apparatus (PPA).
| DocumentType |
Standard
|
| Pages |
180
|
| PublisherName |
American Petroleum Institute
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| API RP 13C:2014(R2023) | Recommended Practice on Drilling Fluid Processing Systems Evaluation |
| API SPEC 13A:2019 | Drilling Fluids Materials<br> |
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