Your Source for Oilfield Equipment and Supplies R. Katz Tool & Supply specializes in oilfield equipment. Our Headquarters is located in the town of Cuero in South Central Texas. We supply a wide variety of oilfield equipment including drilling equipment, workover equipment and production equipment. All equipment meets the rigorous industry standards established by the American Petroleum Institute (API). As a global supplier of quality oilfield equipment to the oil and gas industry, we ship products around the world.