Harvill Drill Stem Testing (HQ: Brownfield, TX) is a drilling and completion services company specializing in the innovative use of acoustic systems that allow for the analysis and gathering of real-time measurements. The company specializes in drill stem testing, which involves running a suite of tools on drill pipe and isolating a section of the open hole for the purpose of evaluating the well. Harvill also provides other essential services to oil and gas producers, including heliarc welding, drilling,