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Standard: ANSI API RP 13I-2009 (Recommended Practice).
| Parameter | Test Apparatus | Key RP 13I Conditions | Unit | |—|—|—|—| | Density | Pressurized Mud Balance | Calibration with H₂O at 20 °C | ppg / g/cm³ | | Plastic Viscosity | Direct-Indicating Viscometer | 120 V / 60 Hz / Thermocouple | cP | | Filtrate Volume | LTLP Filter Press | 100 ± 5 psi / 7.5 min | mL / 30 min | | HTHP Filtrate | HTHP Filter Press | 500 psi / Temperature (BHCT) | mL / 30 min | | Oil/Water/Solids | Retort Kit | 450 °F (230 °C) /~30 min | % vol | | MBT | Methylene Blue Syringe | 3% H₂O₂ treatment for OBM | lb/bbl | | Property | Equipment | Critical Parameter per RP 13I-2009 | |—|—|—| | Density | Mud Balance | Calibration to 8.33 ppg | | PV / YP | Direct-Indicating Viscometer | 600 / 300 RPM readings, R1B1 rotor/bob | | API Filtration | LTLP Filter Press | 7.5 min, 100 psi filter paper | | HTHP Filtration | HTHP Press | Delta P = 500 psi, Heating jacket | | CEC / MBT | Methylene Blue Syringe | Swab test endpoint |
Q: What is the primary difference between ANSI API RP 13I-2009 and the later edition?
A: The 2009 edition is the base consolidated standard. Later revisions focused on specific clarifications for HTHP hardware and automated particle size distribution testing. 2009 is still widely used for contractual baseline testing.
A: The 2009 edition is the base consolidated standard. Later revisions focused on specific clarifications for HTHP hardware and automated particle size distribution testing. 2009 is still widely used for contractual baseline testing.
Q: Is this standard applicable for testing completion fluids as well?
A: Primarily drilling fluids, but many tests (brine density, viscosity, filtration) overlap with completion fluid testing if referenced in the well program.
A: Primarily drilling fluids, but many tests (brine density, viscosity, filtration) overlap with completion fluid testing if referenced in the well program.
Q: What is the required calibration frequency for the Mud Balance according to RP 13I?
A: The standard recommends daily calibration against fresh water (8.33 lb/gal / 1.0 g/cm³) at standard temperature. Overhaul/tare verification is recommended monthly.
A: The standard recommends daily calibration against fresh water (8.33 lb/gal / 1.0 g/cm³) at standard temperature. Overhaul/tare verification is recommended monthly.