PORTRUSH PETROLEUM CORP#AUG 21 2007

Portrush Petroleum Corporation wishes to announce that field operations have begun in preparation to drill the next well on the Mission River lease. The well will be drilled to a depth of 7,950 feet and is anticipated to take approximately fourteen days to drill.  Four drilling units (40 acres per unit) are being surveyed and a "Permission To Drill" application for the first location is being prepared for filing with the Texas Railroad Commission in Austin, Texas. This well location will be constructed immediately and the operator is working with the drilling rig company to schedule the rig move to the drillsite.  The operator anticipates drilling the first well will confirm the results of the 3-D seismic data shot in December 2006 and January 2007 and thoroughly reviewed since the completion of the Scanio Sheldon No. 8 drilled earlier this year. The re-worked seismic clearly identifies the intended payzones expected to be penetrated by this first well. A successful well would then be followed by three additional wells.  The Mission River lease is being developed by McAlester and is located at the south end of the town of Refugio, Refugio County, Texas. The field has multiple pays at depths ranging from 2,000 to 8,800 feet.  Portrush has a 10% working interest in the field. To date nine wells have been drilled and all nine wells have been placed on production.