Particle Drilling Technologies, Inc. to Present at
the RBC Capital Markets North American Energy Conference 2005

Houston, Texas--(BUSINESS WIRE)—May 26, 2005—Particle Drilling Technologies, Inc. (PDRT.OB) announced today that John D. Schiller, Jr., President and Chief Executive Officer, will present at 9:35 a.m. eastern time in Boston on Tuesday, June 7, 2005 at the RBC Capital Markets North American Energy Conference.

The archived webcast and presentation will be available on the Company’s website at / beginning Wednesday, June 8, 2005 until the close of business Thursday, June 30, 2005.

About Particle Drilling Technologies, Inc.

PDTI is a development stage oilfield service and technology company owning certain patents and pending patents related to the Particle Impact Drilling technology. PDTI’s technology is designed to enhance the rate-of-penetration function in the drilling process, particularly in hard rock drilling environments. PDTI is headquartered in Houston, Texas.

Contact:

For further information please contact: J. Chris Boswell, Chief Financial Officer, Particle Drilling Technologies, Inc. +1-713-223-3031 x 204, .