Tethys Petroleum offers Doris to Hong Kong investors

For an oil exploration company to mutate into a something with real value, the Hollywood clichés of elated wildcatters in cowboy boots dancing a jig as a spurting well douses them with black gold are basically true. An oilman needs to get a strike before burning through all his cash. 'Doris' is the name of an oil strike in the Kazakh desert owned by Toronto-listed Tethys Petroleum. Dr David Robson, a veteran oilman who used to work for energy major Mobil and is now chairman of Te…