Allis-Chalmers Energy to Participate in the Tristone Capital Global Energy Forum

Allis-Chalmers Energy Inc. (NYSE:ALY) today announced that it will be participating in the Tristone Capital Global Energy Forum. The conference is being held May 12-16, 2008, in Paris, France.

Micki Hidayatallah, Allis-Chalmers’ Chief Executive Officer is scheduled to make a presentation on Wednesday, May 14, 2008, at approximately 10:40 am. To listen to the live audio webcast and view Allis-Chalmers’ slideshow, visit the link below or Tristone Capital’s website at www.tristonecapital.com.

https://tristonecapital-ls.webex.com/tristonecapital-ls/onstage/g. php?p=2&t=m (Due to its length, this URL may need to be copied/pasted into your Internet browser’s address field. Remove the extra space if one exists.)

A replay of the webcast and slideshow will also be available on Tristone Capital’s website for approximately six months.

About Allis-Chalmers

Allis-Chalmers Energy Inc. is a Houston-based multi-faceted oilfield services company. We provide services and equipment to oil and natural gas exploration and production companies, domestically primarily in Texas, Louisiana, New Mexico, Colorado, Oklahoma, Mississippi, Wyoming, Arkansas, West Virginia, offshore in the Gulf of Mexico, and internationally, primarily in Argentina and Mexico. Allis-Chalmers provides directional drilling services, casing and tubing services, underbalanced drilling, production and workover services with coiled tubing units, rental of drill pipe and blow-out prevention equipment, and international drilling and workover services. For more information, visit our website at http://www.alchenergy.com or request future press releases via email at http://www.b2i.us/irpass.asp?BzID=1233&to=ea&s=0.