PARTICLE DRILLING TECHNOLOGIES ANNOUNCES SECOND QUARTER RESULTS

Operational Highlights

• Fourth Commercial Field Trial completed, this time with One of North America's Largest Independent Oil and Gas Companies;
• Most recent trial resulted in best overall performance to date;
• Testing and Evaluation of New Extruder-Injector System Progresses

Houston - May 10, 2007 – Particle Drilling Technologies, Inc. (NASDAQ: PDRT) (the "Company") today announced its financial results for the fiscal quarter ended March 31, 2007.

The Company successfully completed its fourth commercial trial and its first drilling in the Travis Peak formation in Texas, achieving its best overall performance to date during its second fiscal quarter. During this trial, the Company drilled nearly as much footage as in all of its previous field trials combined. In addition, it demonstrated a substantial improvement in productive drilling time ("PDT") - moving to more than 50% on the most recent trial from 19% on its first trial. Particle Drilling Technologies attributes the improvement in PDT to the use of its new PID Unit, which the Company rolled out just prior to the Travis Peak trial.

The Company expects to make another big leap in PDT when it deploys a new particle-injection system. The current system is being replaced due to limitations related to hydraulics and the strains associated with continuous operation. These limitations resulted in a majority of the non-productive time experienced during the Travis Peak trial. Fluctuations in the stand pipe pressure as drilling progresses requires frequent increases or decreases in the pressure required to consistently inject particles into the drilling rig's high-pressure line. This hydraulic balancing act often results in an inconsistent stream of particle-injection which prevents continuous PID drilling and affects the rate-of-penetration (ROP). In addition, the harder the frac pump runs, the more often various components on the injection system need to be replaced. These issues must be addressed to improve productive drilling time and achieve the desired level of performance.

The Company is currently testing and evaluating the new particle-injection system, which is based on an extruder design. The new system was developed to mechanically inject the particles on a continuous basis regardless of the range of stand-pipe pressures - eliminating the factors affecting the performance of the existing frac pump-based system. In addition, the new system should deliver a more reliable volume of shot into the stand-pipe and to the PID bit downhole. The end result should be an improvement in the PID system's overall performance and reliability.

The Travis Peak trial marked the first time the company ran an 8.5 inch PID bit in the field, as opposed to the 7 7/8 inch PID bit used in all of its previous trials. While the average ROP was the highest achieved with PID and considerably higher than that of the conventional bits used before and after the PID run, the ROP multiple was not as high as the multiples observed in previous trials using the 7 7/8 inch PID bit. The reduced multiple was the result of the newly designed 8.5 inch PID bit having drilled off-center during the trial. To correct this situation, the Company is making modifications to the 8.5 inch PID bit that it believes will further improve ROP on the next commercial trial.

"This most recent quarter represents another big step forward in the development of our PID technology," said Jim B. Terry, President and CEO, Particle Drilling Technologies. "Most notably, we demonstrated our best performance to date in a new formation, with a new customer using a newly designed bit - while integrating on a different drilling rig. Overall, the new PID unit performed very well."

"While we will always continue to make some slight modifications to our bit," added Terry. "We will now aggressively focus on replacing the frac-pump driven injector system with something less expensive and more reliable. I feel confident that we are on the right path to make the successful transition from the old injection system to the new injection system, which should allow our performance to dramatically improve on the next commercial trial."

Particle Drilling Technologies' financial results reflect its status as a development stage company during the second quarter of fiscal 2007 generating no revenue. The following is a summary of the quarterly results:

The Company will hold a conference call at 10:00 a.m. Eastern Time on Friday May 11, 2007, to discuss its quarterly results and to provide a further operational update. To participate in the call, dial 303-262-2138 and ask for the Particle Drilling call at least 10 minutes prior to the start time, or access it live over the Internet by logging onto the web at www.particledrilling.com, on the "Investor Relations" section of the Company's website. To listen to the live call on the web, please visit the web site at least fifteen minutes prior to the call to register, download and install any necessary audio software.

If you cannot listen to the live webcast, an archive will be available shortly after the call for a period of 90 days on the "Investor Relations" section of the Company's website. A telephonic replay of the conference call will be available through May 18, 2007 and may be accessed by calling 303-590-3000 and using the pass code 11089291.

Particle Drilling Technologies, Inc., headquartered in Houston, Texas, is a development-stage oilfield service and technology company owning several patents and pending patents related to its Particle Impact Drilling technology. The Company's technology is designed to enhance the rate-of-penetration function in the drilling process, particularly in hard rock drilling environments.

Certain statements in this press release that are not historical but are forward-looking are subject to known and unknown risks and uncertainties, which may cause PDTI's actual results in future periods to be materially different from any future performance that may be suggested in this press release. Such risks and uncertainties may include, but are not limited to, PDTI's ability to raise capital, if necessary, and its ability to obtain financing on acceptable terms, if at all, a worldwide downturn in the energy services sector, working capital constraints and other risks described in PDTI's filings with the SEC. Further, PDTI is a development stage company that operates in an industry sector where securities values are highly volatile and may be influenced by economic and other factors beyond PDTI's control such as announcements by competitors and service providers.

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