ISO 13501:2011

Overview

ISO 13501:2011 - "Petroleum and natural gas industries - Drilling fluids - Processing equipment evaluation" - defines a standard, field-oriented procedure for assessing and modifying the performance of solids‑control and drilling‑fluids processing equipment. The standard covers whole‑system evaluation (not intended for ranking or direct comparison of similar individual pieces of equipment) and provides lab and rigsite methods to evaluate removal of drilled solids from drilling fluids used in petroleum and natural gas operations.

Key topics and technical requirements

• System performance of drilled‑solids removal: principles, apparatus, sampling and procedures to assess overall solids‑control effectiveness.
• Rigsite evaluation: sampling of streams for capture analysis, determination of mass fraction (percent) solids, calculation of capture, interpretation of results and characterization of removed solids (including low‑gravity solids and particle size assessment).
• Practical operational guidelines: design and operational recommendations for shale shakers, degassers, desanders, desilters, mud cleaners, centrifuges, pumps, addition/suction/discharge sections and use of mixing/blending equipment.
• Shale shaker screen testing: conductance testing, calibration and flow/pressure‑drop procedures; procedures for screen designation including D100 separation measurement and non‑blanked area calculations.
• Labelling and documentation: requirements for shale shaker screen labelling and shipping/container marking.
• Economics and performance interpretation: guidance on operational economics and interpreting capture results.
• Normative references: references and equivalences to ISO 3310‑1 (test sieves) and ISO 10414 (field testing of drilling fluids); based on API RP 13C and API RP 13E material.

Practical applications

• Field evaluation and tuning of solids‑control systems to improve drilling fluid quality and reduce waste handling costs.
• On‑rig sampling and testing workflows for capture efficiency, solids mass fraction and particle sizing to inform operational adjustments (e.g., screen selection, shaker settings, hydrocyclone/centrifuge tuning).
• Guidance for equipment manufacturers and rental companies to document performance characteristics and for buyers to validate rigsite performance.
• Training and quality assurance for drilling‑fluid engineers, mud engineers and rig crews focused on solids control and fluid handling.

Who should use ISO 13501:2011

• Drilling and mud engineers, rig site supervisors and operations teams
• Equipment manufacturers, rental companies and test laboratories
• Procurement, QA/QC and regulatory stakeholders in petroleum and natural gas drilling projects

Related standards

• API RP 13C / API RP 13E (source material referenced in the introduction)
• ISO 3310‑1 (test sieves) and ISO 10414‑1/‑2 (field testing of water‑ and oil‑based drilling fluids)

Keywords: ISO 13501:2011, drilling fluids, solids control, shale shaker, centrifuge, desander, desilter, mud cleaner, screen conductance, D100 separation, rigsite evaluation.