PARTICLE DRILLING TECHNOLOGIES PROVIDES OPERATIONAL UPDATE

Houston - June 4, 2007 – Particle Drilling Technologies, Inc. (NASDAQ: PDRT) is providing an update on its progress to replace the existing frac pump based particle injection system. While the Company continues to evaluate other replacement options, this update will focus on progress made on its extruder based injection system.

• Over the last eight weeks, the Company’s research, development and operations resources have been dedicated to the testing, iterating, fabricating and retesting of the extruder based injection system.
• The results of testing under conditions that replicate what we have experienced and those that may be encountered in the field are driving modifications, additional testing and the timeline for the first field trial with this system.

The Company began an R&D program on the extruder based injection system in early April with an expectation that a 60 day period would be adequate to evaluate the strengths and weaknesses of the extruder injector design. Specifically, the Company has been evaluating the extruder’s ability to continuously inject a metered volume of particles into a variable range of high pressure in a safe and repeatable manner. The process of understanding test results and making hardware modifications such that the next logical test can be carried out have been slowed by the time it takes to fabricate the hardware modifications required for subsequent tests. The extension of the testing period is primarily related to fabrication delays resulting from today’s overextended machine shop capacity in Houston and the surrounding areas.

Integral to the extruder based injection system is the diffuser, which reduces pressure between the rig’s high pressure line and the extruder. In its simplest form, the diffuser is a length of pipe that, when fully packed with particles, is sufficient to diffuse the majority of gross pressure typical on oil and gas wells. There are several variables that contribute to the diffuser’s functionality. These variables are being evaluated in detail to determine the optimum conditions and to provide a complete understanding of the conditions that should be avoided for safe and efficient operations.

The Company’s full resources are currently devoted towards developing this system and therefore management believes that further field testing of the Particle Impact Drilling (“PID”) system should not be resumed until such time as a new injection system is ready for the field.

The Company has recently been in contact with both of its customers who have expressed continued interest and patience as the development of the PID system continues to evolve. While it is too early to accurately forecast the timing for the next field trial, the Company and its customers are in continuous dialog with all parties sharing the desire to prioritize a quality field trial rather than rushing to the next available opportunity.

The Company will hold a conference call at 9:00 a.m. Eastern Time on Tuesday, June 5, 2007, to discuss this operational update and to allow investors the opportunity to ask any further questions about the Company’s progress. To participate in the call, dial 303-262-2125 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 June 12, 2007 and may be accessed by calling 303-590-3000 and using the pass code 11091137.

About Particle Drilling Technologies, Inc.
Particle Drilling Technologies, Inc. (NASDAQ: PDRT) is a development-stage oilfield service and technology company commercializing its patented and patent-pending Particle Impact Drilling system. The Company’s technology is designed to enhance the rate-of-penetration function in the drilling process, particularly in hard-rock environments. It is headquartered in Houston, Texas. For more information, visit: www.particledrilling.com.

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.