NOV Wilson 26 Quality Mat Company / Guzzler 7 Manufacturing / Gibson Energy ULC Grit Industries Inc. / Skycasters 10 Thomas Petroleum 33 Tooz Construction Inc. / Custom Fire Apparatus Inc. / DXP Enterprises / National Oilwell Varco / MFG CO. / Williston Basin Petroleum / Wilson 26 Quality Mat Company 1 Rush-Overland Manufacturing / 3M Abrasive Blast Supply Astro-Thermal-Tec Builders Choice Butler Machinery Cimarron Energy Inc. / Industries Inc / Dragon Products Ltd / Compression 32 Vactor Manufacturing / Houston Weatherford US LP / Clean Harbors ConleyMax Energy Inc. / /