Particle Drilling Technologies, Inc. Announces Successful Results of Its Drill Bit Testing Program Conducted at TerraTek

HOUSTON, June 17 /PRNewswire-FirstCall/ -- Particle Drilling Technologies, Inc. (OTC Bulletin Board: PDRT - "PDTI") today announced that it has successfully completed the second phase of its laboratory test program evaluating several versions of its particle impact drill bit ("PID bit") at the independent Drilling and Completions Laboratory at TerraTek in Salt Lake City, Utah.

"We are very pleased with the better-than-anticipated results of our recent tests and remain on track to conduct a test of the entire PID system at the Gas Technology Institutes' Catoosa facility outside of Tulsa, Oklahoma ('Catoosa') currently scheduled to begin on July 18th of this year," stated John Schiller, Particle Drilling's CEO. "The Catoosa field tests are designed to further evaluate the performance of the entire PID system and to provide comparative analysis of the PID system with conventional drilling technologies in certain hard rock strata found at Catoosa. We look forward to the Catoosa tests as the next step towards commercialization."

Description of Testing Completed at TerraTek

From June 6 through 14, 2005, PDTI conducted a series of 11 full scale tests on three versions of the PID bit:

(1) a modified version of the high volume PID bit tested during phase 1 that is designed to operate with 600 or more gallons per minute ("GPM") of total fluid, including up to 16.5 GPM of shot;

(2) a modified version of the low volume PID bit tested during phase 1 that is designed to operate with 400 to 450 GPM of total fluid, including up to 16.5 GPM shot; and

(3) a next generation high volume PID bit designed to operate with 600 or more GPM total fluid, including up to 16.5 GPM shot. This bit features slight design changes associated with the nozzles and cutters on the bit.

All three bits exhibited consistent drilling performance throughout a number of separate tests including shot rates of 12, 14 and 16.5 GPM and with bit weights ranging from 5,000, 10,000 and 15,000 pounds.

"During this test phase overall penetration rates for all three bits met or exceeded our expectations," added Schiller. "In general, penetration rates for the modified high volume PID bit and the next generation high volume PID bit showed a greater than 10% improvement over the high volume PID bit we tested in March. Further, we successfully tested the modified low volume PID bit that we were unable to test reliably in March. The penetration rate of the modified low volume PID bit consistently performed as well as or better than the next generation high volume PID bit, and consistently exceeded the performance of the original high volume PID bit and the modified high volume PID bit."

Particle Drilling Technologies, Inc., headquartered in Houston, Texas, is a development stage oilfield service and technology company owning certain patents and pending patents related to the 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 equity capital, if necessary, and its ability to obtain equity financing on acceptable terms, if at all, a severe worldwide slowdown in the energy services sector and working capital constraints. 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.

Contacts: J. Chris Boswell, SVP & CFO, Particle Drilling Technologies, Inc., 713-223-3031 ext. 204. Ken Dennard, Managing Partner, Jack Lascar, Partner, DRG&E / 713-529-6600