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Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0000354204-10-001178
Filing Date
2010-02-08
Accepted
2010-02-08 10:39:25
Documents
1

Document Format Files

Seq Description Document Type Size
1 SCHEDULE 13G rrd450.htm SC 13G/A 50163
  Complete submission text file 0000354204-10-001178.txt   52439
Mailing Address 5075 WESTHEIMER SUITE 890 HOUSTON TX 77056
Business Address 5075 WESTHEIMER SUITE 890 HOUSTON TX 77056 713-369-0550
Allis Chalmers Energy Inc. (Subject) CIK: 0000003982 (see all company filings)

IRS No.: 390126090 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-30534 | Film No.: 10579558
SIC: 1389 Oil & Gas Field Services, NEC

Mailing Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746
Business Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746 (512) 306-7400
DIMENSIONAL FUND ADVISORS LP (Filed by) CIK: 0000354204 (see all company filings)

IRS No.: 222370029 | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 0000