Original oil and gas trade magazine vintage ad for JOY RICHART & JACK RENFRO, was located at 4 Corners, Santa Fe Springs, CA. A Laxative for Oil Wells. Chemical pressure wash to increase production in sluggish wells, reopen abandoned wells and clean the rotary mud out of new wells. This unique 1934 old fractional page oilfield petroleum industry magazine advertisement would display beautifully matted and framed. Great graphics. Approximate size 5 x 13 inches.