SINO AMERICAN OIL COMPANY SIGNS MOU WITH ESTACADO ENERGY, LLC FOR PURCHASE OF OIL PRODUCING PROPERTY IN TEXAS Cheyenne, WY, Nov. 16, 2021 (GLOBE NEWSWIRE) -- Sino American Oil Company, (OTC PINK: OILY) ($OILY), an emerging Oil and Gas exploration company, is pleased to announce the signing of a Memorandum...