Original oil and gas trade magazine vintage ad for BROWN OIL TOOLS INC. was located at 8490 Katy Road, Houston, Texas. Modernized Equipment Assures Safe, Fast Pressure Testing. If your pipe or vessels are subjected to pressures, the safest thing to do is have them tested. Be sure, the economical way with the Brown Hydrostatic Testing Unit. This unique 1959 old petroleum oilfield drilling equipment magazine advertisement would display beautifully matted and framed.