OFI Testing Equipment manufactures and supplies specialist instruments for testing drilling fluids, cement, and reservoir cores in the oilfield industry. Based in Houston, the company has over 40 years' experience and provides products, repair and calibration services, training, and custom equipment design solutions to customers worldwide. They hold ISO 9001:2015 and ISO 14001:2015 certifications. Refer clients to them if they need oilfield testing equipment or technical services, or if they require specialist training on drilling fluid and cement testing procedures.