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Hawke's Bay Herald-Tribune, Issue 116, 2 June 1937, Page 6

A new process, patented by a St. Louis (U.S.A.) inventor, is . said to make "dnied-up" wells produce oil. Such simple chemicals as hydrochloric acid aiid sodium fluoride, properly emulsified and injected into tho well, are the basis of the invention. It is explained that many oil wells which st'op producing are not really dry in the sense that tlieir supply is exhausted. In many cases, the output • of oil is stoiiped onlv by tho building up of solid deposits of inorganie salts or wav, which clog Ihe channels or pores of the cil-bearing rock. Tho ehomical mixture has the prox>erty of dissolving such deposits, and, it is claiiied, will make the rock more porous than it was originally, by eating out new opening.s. Tlie eompositiou is 'inactxvo until it roaches the clogging niinerals deep down in the well, and thcrefore does not attack the casing and other parts of the oil- well machinery.