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<P align="center" style="font-size: 14pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION<BR>
<FONT style="font-size: 12pt">Washington, D.C. 20549
</FONT></B>

<P align="center" style="font-size: 18pt"><B>FORM 8-K</B>

<P align="center" style="font-size: 12pt"><B>CURRENT REPORT<BR>
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</B>

<P align="center" style="font-size: 10pt"><B>Date of Report (Date of earliest event reported): May 6, 2009</B>

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<P align="center" style="font-size: 24pt"><B>ALLIS-CHALMERS ENERGY  INC.<BR></B>
<FONT style="font-size: 10pt">(Exact name of registrant as specified in its charter)
</FONT>

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    <TD style="border-bottom: 1px solid #000000"><B>Delaware</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>001-02199</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>39-0126090</B></TD>
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<TR valign="top">
    <TD>(State or other Jurisdiction of Incorporation)</TD>
    <TD>&nbsp;</TD>
    <TD>(Commission File Number)</TD>
    <TD>&nbsp;</TD>
    <TD>(IRS Employer Identification No.)</TD>
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    <TD width="49%">&nbsp;</TD>
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    <TD width="49%">&nbsp;</TD>
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    <TD style="border-bottom: 1px solid #000000"><B>5075 Westheimer<BR>Suite 890<BR>Houston, Texas<BR></B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>77056</B></TD>
</TR>
<TR valign="top">
    <TD>(Address of Principal Executive Offices)</TD>
    <TD>&nbsp;</TD>
    <TD>(Zip Code)</TD>
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<P align="center" style="font-size: 10pt">Registrant&#146;s telephone number, including area code: <B>(713) 369-0550</B>


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    <TD nowrap>(Former name or former address if changed since last report.)</TD>
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<P align="left" style="font-size: 10pt">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant
under any of the following provisions:

<P align="left" style="font-size: 10pt">
<FONT face="Wingdings">&#111;</FONT> Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))<BR>


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<P align="center" style="font-size: 10pt; display: none">1
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<P align="left" style="font-size: 10pt"><B>Item&nbsp;2.02 Results of Operations and Financial Condition.</B>


<P align="left" style="font-size: 10pt"><B>Item&nbsp;7.01 Regulation&nbsp;FD Disclosure.</B>


<P align="left" style="font-size: 10pt; text-indent: 4%">On May&nbsp;6, 2009, Allis-Chalmers
Energy Inc. (the &#147;Company&#148;) announced earnings results for the first quarter ended
March&nbsp;31, 2009. A copy of the Company&#146;s press release is attached as Exhibit&nbsp;99.1.


<P align="left" style="font-size: 10pt; text-indent: 4%">The exhibit described above is not being &#147;filed&#148; for purposes of Section&nbsp;18 of the Securities Exchange Act of
1934, as amended, but is being furnished solely to comply with Item&nbsp;2.02 of Form 8-K and Regulation&nbsp;FD promulgated by
the Securities and Exchange Commission.


<P align="left" style="font-size: 10pt"><B>Item&nbsp;9.01. Financial Statements and Exhibits.</B>


<P align="left" style="font-size: 10pt"><B>d) Exhibits</B>

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    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit Number</TD>
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    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Description</TD>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Press Release, dated May&nbsp;6, 2009.</TD>
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<P align="center" style="font-size: 10pt"><B>SIGNATURES</B>



<P align="left" style="font-size: 10pt; text-indent: 4%">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to
be signed on its behalf by the undersigned hereunto duly authorized.

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&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">ALLIS-CHALMERS ENERGY INC.</TD>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Date: May&nbsp;5, 2009
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">By: <u>/s/ Theodore F. Pound III</u></TD>
</TR>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Name: Theodore F. Pound III</TD>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Title: General Counsel &#038;
Secretary</TD>
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<P align="center" style="font-size: 10pt; display: none">2
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<P align="left" style="font-size: 10pt">EXHIBIT INDEX
<BR>
&nbsp;

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    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Description</TD>
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    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Press Release, dated May&nbsp;6, 2009.</TD>
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{"company-data": {"conformed-name": "Allis Chalmers Energy Inc.", "cik": "0000003982", "assigned-sic": "1389", "irs-number": "390126090", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-02199", "film-number": "09799605"}, "business-address": {"street1": "5075 WESTHEIMER", "street2": "SUITE 890", "city": "HOUSTON", "state": "TX", "zip": "77056", "phone": "713-369-0550"}, "mail-address": {"street1": "5075 WESTHEIMER", "street2": "SUITE 890", "city": "HOUSTON", "state": "TX", "zip": "77056"}, "former-company": [{"former-conformed-name": "ALLIS CHALMERS CORP", "date-changed": "19920703"}, {"former-conformed-name": "ALLIS CHALMERS MANUFACTURING CO", "date-changed": "19710614"}]}
Form 8-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): May 6, 2009
ALLIS-CHALMERS ENERGY  INC.
(Exact name of registrant as specified in its charter)
Delaware
001-02199
39-0126090
(State or other Jurisdiction of Incorporation)
(Commission File Number)
(IRS Employer Identification No.)
5075 Westheimer
Suite 890
Houston, Texas
77056
(Address of Principal Executive Offices)
(Zip Code)
Registrant's telephone number, including area code:
(713) 369-0550
(Former name or former address if changed since last report.)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant
under any of the following provisions:
o
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 2.02 Results of Operations and Financial Condition.
Item 7.01 Regulation FD Disclosure.
On May 6, 2009, Allis-Chalmers
Energy Inc. (the "Company") announced earnings results for the first quarter ended
March 31, 2009. A copy of the Company's press release is attached as Exhibit 99.1.
The exhibit described above is not being "filed" for purposes of Section 18 of the Securities Exchange Act of
1934, as amended, but is being furnished solely to comply with Item 2.02 of Form 8-K and Regulation FD promulgated by
the Securities and Exchange Commission.
Item 9.01. Financial Statements and Exhibits.
d) Exhibits
Exhibit Number
Description
99.1
Press Release, dated May 6, 2009.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to
be signed on its behalf by the undersigned hereunto duly authorized.
ALLIS-CHALMERS ENERGY INC.
Date: May 5, 2009
By:
/s/ Theodore F. Pound III
Name: Theodore F. Pound III
Title: General Counsel &
Secretary
EXHIBIT INDEX
Exhibit Number
Description
99.1
Press Release, dated May 6, 2009.