Stewart & Stevenson is a leading designer, manufacturer and provider of specialized equipment and aftermarket parts and service for the oil and gas and other industries that we have served for over 110 years. Our wide range of products support hydraulic fracturing, well stimulation, workover, intervention and drilling operations. These products include pumping, acidizing, coiled tubing, cementing and nitrogen units, drilling rigs and workover rigs, power generation systems and electrical support and distribution systems. - See more at: