Oilfield Organoclay Grade Selection Guide

Start with the drilling fluid system, base oil, target bottomhole temperature, rheology and gel-strength target, mixing energy, activator availability, and document requirements. Use this guide to shortlist a grade path, then confirm with the current TDS and a sample test in your own formulation. As a first screen: OD-05 and OD-20 suit general and economical oil-based mud, OD-28 and OD-E29 suit easier dispersion, and OD-29 suits high-temperature and deep wells. Do not choose by model name alone; send your conditions to the technical team for a recommendation.

For general oil-based mud, OD-20 is the lead economical OBM viscosifier and gelling-agent path, with OD-05 as a related economical grade. The best choice still depends on base oil, temperature, density, and the rheology target, so confirm with the TDS and a sample test. If mixing energy is limited, an easier-dispersing grade such as OD-28 or OD-E29 may be reviewed instead. Share your OBM system details with the technical team so the recommendation matches your field conditions rather than a generic default.

For HPHT and deep wells, OD-29 is the lead high-temperature review path because it is selected to hold viscosity, gel strength, and suspension as downhole temperature rises. A single temperature rating is not published because thermal performance depends on the base oil, weighting, and the complete mud design, not the organoclay alone. Confirm the usable limit with the current TDS and a sample test at your target bottomhole temperature before scaling to a bulk order.

For faster wetting and dispersion, OD-28 is the dispersion-focused path, while OD-E29 is an easy-dispersing, typically self-activating grade that can need little or no polar activator. These are reviewed when mixing energy or mixing time is limited, or when a uniform yield point is needed quickly. Real dispersion behavior depends on base oil, temperature, addition rate, and equipment, so confirm on a sample before scaling. The dispersion procedure page gives step-by-step mixing guidance.

No. A high-temperature grade is selected for HPHT and deep well conditions, but for standard-temperature or economical wells a conventional or easy-dispersing grade may be the better and more cost-effective choice. Matching the grade to the actual system, temperature, and rheology target matters more than picking the highest-rated option. Use the selection tables here to narrow the path, then confirm with the TDS and sample testing rather than assuming a higher rating always improves performance.

Before purchase, review the current TDS and run a sample test in your own formulation at your target base oil, density, and bottomhole temperature. Check viscosity, yield point, gel strength, suspension or sag behavior, and dispersion under your mixing conditions. Request SDS/MSDS for safety review and COA where available for batch-level confirmation. Final selection should be confirmed through document review and actual formulation testing before any large order or long-term supply decision.