| Weighting materials | Barite; hematite | Increase drilling-fluid density to help control formation pressure. | Confirm particle-size distribution, density, contaminants, packaging, and suitability for the planned mud system. Barite specifications may be assessed against API Specification 13A. | Product specification, certificate of analysis, safety data sheet, and applicable API 13A test results. |
| Viscosifiers | Bentonite; xanthan gum | Build viscosity and help suspend drill cuttings and weighting solids. | Check compatibility with water salinity, temperature, other fluid additives, and local water quality. Performance can vary with source material and mixing practice. | Technical data sheet, safety data sheet, batch certificate, and recommended mixing procedure. |
| Fluid-loss control agents | Polyanionic cellulose (PAC); carboxymethyl cellulose (CMC); starch-based products | Help limit fluid loss into permeable formations and support filter-cake formation. | Review the grade, salt tolerance, temperature range, and compatibility with the complete drilling-fluid formulation. | Technical data sheet, filtration test results, safety data sheet, and certificate of analysis. |
| Shale inhibitors | Potassium chloride; selected polymer-based inhibitors | Help reduce shale swelling or dispersion in water-based drilling fluids. | Selection depends on formation mineralogy, fluid design, discharge requirements, and applicable local environmental rules. | Product specification, safety data sheet, compatibility guidance, and environmental information where available. |
| Lubricants and torque reducers | Water-based lubricants; ester-based additives; graphite products | Reduce friction in the drilling system and may help manage torque and drag. | Confirm performance in the intended fluid, material compatibility, operational temperature range, and environmental restrictions. | Technical data sheet, safety data sheet, compatibility data, and environmental declarations where applicable. |
| Defoamers | Silicone-based and non-silicone defoamer formulations | Control unwanted foam in drilling-fluid preparation and circulation systems. | Check dosage guidance and compatibility with fluid additives, downstream treatment, and site-specific discharge requirements. | Technical data sheet, safety data sheet, and dosage recommendations. |
| Corrosion inhibitors | Formulated inhibitors for drilling and completion fluids | Help protect metal components from corrosion under specified operating conditions. | Match the product to the metallurgy, fluid chemistry, temperature, and exposure conditions; confirm handling and environmental requirements. | Technical data sheet, safety data sheet, corrosion test information, and handling instructions. |
| Biocides | Formulated products for controlling microbial growth in fluid systems | Help manage bacteria that can degrade fluid additives or contribute to operational problems. | Verify local registration and permitted uses before import or use. Requirements differ by jurisdiction and intended application. | Safety data sheet, product label, registration or authorization documents where required, and use instructions. |
| Blending and technical support | Fluid-system design support; laboratory testing; field troubleshooting | Help buyers select and apply products for specific wells, formations, and operating conditions. | Ask about local technical coverage, sample testing, language support, response times, and the scope of field-service availability. | Fluid program, laboratory reports, product compatibility guidance, and field-service records where applicable. |
| International logistics and compliance | Bulk, bagged, or liquid shipments; export and import documentation | Support delivery to drilling locations, ports, warehouses, or regional supply bases. | Confirm Incoterms, lead times, shelf life, packaging, dangerous-goods classification, customs requirements, and destination-country chemical rules before shipment. | Commercial invoice, packing list, safety data sheet, certificate of origin where needed, and transport documents appropriate to the shipment. |