Union Drilling Announces Second Quarter 2007 Earnings Release and Conference Call Schedule

FORT WORTH, Texas, July 9 /PRNewswire-FirstCall/ — Union Drilling, Inc. announced today that it will release its 2007 second quarter results after the market closes on Wednesday, August 1, 2007. In conjunction with the release, the company has scheduled a conference call, which will be broadcast live over the Internet, on Thursday, August 2, 2007 at 11:00 a.m. eastern time.

   What:    Union Drilling Second Quarter 2007 Earnings Conference Call    When:    Thursday, August 2, 2007 at 11:00 a.m. eastern time    How:     Live via phone — By dialing 303-262-2130, or live over the            Internet by logging onto the web at the address below    Where:   http://www.uniondrilling.com/, in the “Investor Relations” section            of the Company’s website   

For those who cannot listen to the live call, a telephonic replay will be available through August 9, 2007 and may be accessed by calling 303-590-3000 and using the pass code 11092919#. Also, an archive of the webcast will be available after the call for a period of 60 days on the “Investor Relations” section of the Company’s website.

Union Drilling, Inc., headquartered in Ft. Worth, Texas, provides contract land drilling services and equipment, primarily to natural gas producers, in the United States. Union Drilling currently owns 77 rigs and specializes in unconventional drilling techniques.

   Contacts:    Union Drilling, Inc.                Christopher D. Strong, CEO                A.J. Verdecchia, CFO                817-735-8793                 DRG&E                Ken Dennard / Ben Burnham                713-529-6600  

UDRL-E

Union Drilling, Inc.

CONTACT: Christopher D. Strong, CEO, or A.J. Verdecchia, CFO,+1-817-735-8793, both of Union Drilling, Inc.; or Ken Dennard or Ben Burnham,+1-713-529-6600, both of DRG&E, for Union Drilling, Inc.

Web site: http://www.uniondrilling.com/