Portrush Petroleum Corporation

Oil & Gas Company

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Message: Portrush Updates Ontario Project

Portrush Drilling No. 12 at Mission River

Vancouver, British Columbia CANADA, July 23, 2008 /FSC/ - Portrush Petroleum Corporation (PSH - TSX Venture, PRRPF - OTCBB), (http://www.portrushpetroleum.com) wishes to announce that drilling has begun on the Scanio/Sheldon No.12 well in the Mission River property in Texas. The well will be drilled to a total depth of 8,700 feet and is being drilled in conjunction with the No. 11 well which has been drilled and is awaiting completion. The wells are follow up wells to the number ten well that was recently placed on production at a rate of 550,000 MCF and 21 barrels of oil a day.

The Company expects to reach total depth at the number twelve well within the next six to seven days and will attempt to complete both wells as soon as possible. Both wells will be drilled to the Vicksburg formation.

Current production from the Mission River field is approximately 1.6 million cubic feet of gas and 50 barrels of oil/condensate a day. Portrush's share of the revenue is approximately $60,000 per month. The gathering system has sufficient capacity to handle any anticipated increase in production arising from the number 11 &12 wells.

Based on the success of the latest drilling the operator of the Mission River project is currently reviewing further development plans for the field. The results of this review will be released in due course.

About Portrush Petroleum Corporation:

To find out more about Portrush Petroleum Corporation visit our website at www.portrushpetroleum.com.

The statements made in this Press Release may contain forward-looking statements that may involve a number of risks and uncertainties. Actual events or results could differ materially from the Company's expectations and projections.

ON BEHALF OF THE BOARD
Mr. Martin Cotter, President & Director

The TSX Venture Exchange has not reviewed and does not accept responsibility for the Adequacy or accuracy of this release.

Contact Information:

Corporate
Telephone: 866-939-2555
info@portrushpetroleum.com

Source: Portrush Petroleum Corporation (TSX-V: PSH) (OTCBB: PRRPF) http://www.portrushpetroleum.com

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