Allis Chalmers Energy DEFA14A Additional proxy soliciting materials

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities
Exchange Act of 1934 (Amendment No.  )

Filed by the Registrantþ
Filed by a Party other than the Registranto

Check the appropriate box:

o Preliminary Proxy Statement

o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

o Definitive Proxy Statement

þ Definitive Additional Materials

o Soliciting Material Pursuant to §240.14a-12

ALLIS-CHALMERS ENERGY INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

þ No fee required.

o Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1)	Title of each class of securities to which transaction applies:
(2)	Aggregate number of securities to which transaction applies:
(3)	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
(4)	Proposed maximum aggregate value of transaction:
(5)	Total fee paid:

o Fee paid previously with preliminary materials.

o Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

(1)	Amount Previously Paid:
(2)	Form, Schedule or Registration Statement No.:
(3)	Filing Party:
(4)	Date Filed:

Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting of

ALLIS-CHALMERS ENERGY INC.

To Be Held On:

Thursday, June 17, 2010 at 9:00 A.M. CST

5075 Westheimer, Suite 890, Houston, Texas 77056

COMPANY NUMBER

ACCOUNT NUMBER

CONTROL NUMBER

This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting.

If you want to receive a paper ore-mail copy of the proxy materials you must request one. There is no charge to you for requesting a copy. To facilitate timely delivery please make the request as instructed below before June 3, 2010.

Please visithttp://www.amstock.com/proxyservices/viewmaterial.asp?CoNumber=15258, where the following materials are available for view:

	•Notice of Annual Meeting of Stockholders
	•Proxy Statement
	•Form of Electronic Proxy Card
	•Annual Report onForm 10-K
TO REQUEST MATERIAL:	TELEPHONE: 888-Proxy-NA(888-776-9962) and718-921-8562 (for international callers)
	E-MAIL: info@amstock.com

	WEBSITE:http://www.amstock.com/proxyservices/requestmaterials.asp
TO VOTE:	ONLINE:To access your online proxy card, please visitwww.voteproxy.comand follow the on-screen instructions. You may enter your voting instructions at www.voteproxy.com up until 11:59 PM Eastern Time the day before the cut-off or meeting date.
	IN PERSON:You may vote your shares in person by attending the Annual Meeting.
	TELEPHONE:To vote by telephone, please visithttps://secure.amstock.com/voteproxy/login2.aspto view the materials and to obtain the toll free number to call.
	MAIL:You may request a card by following the instructions above.

1.	Election of Directors: NOMINEES:      Saad Bargach Alejandro P. Bulgheroni Giovanni Dell’Orto Victor F. Germack James M. Hennessy Munawar H. Hidayatallah Robert E. Nederlander John T. Reynolds Zane Tankel	2. To ratify the appointment of UHY LLP as the Company’s independent registered public accounting firm. 3. To transact any other business as may properly be presented at the Annual Meeting or any adjournment or postponement thereof. The Board of Directors recommends a vote FOR proposals 1 and 2. These items of business are more fully described in the proxy statement. The record date for the Annual Meeting is April 20, 2010. Only stockholders of record at the close of business on that date may vote at the meeting or any adjournment thereof.
Please note that you cannot use this notice to vote by mail.