EXHIBIT 31.1

                                 CERTIFICATIONS

I, W. Brent LaGere, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of Chandler (U.S.A.),
    Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement
    of a material fact or omit to state a material fact necessary to make
    the statements made, in light of the circumstances under which such
    statements were made, not misleading with respect to the period covered
    by this report;

3.  Based on my knowledge, the financial statements, and other financial
    information included in this report, fairly present in all material
    respects the financial condition, results of operations and cash flows
    of the registrant as of, and for, the periods presented in this report;

4.  The registrant's other certifying officer(s) and I are responsible for
    establishing and maintaining disclosure controls and procedures (as
    defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
    registrant and have:

        a)  Designed such disclosure controls and procedures, or caused
        such disclosure controls and procedures to be designed under our
        supervision, to ensure that material information relating to the
        registrant, including its consolidated subsidiaries, is made known
        to us by others within those entities, particularly during the
        period in which this report is being prepared;

        b)  Evaluated the effectiveness of the registrant's disclosure
        controls and procedures and presented in this report our conclusions
        about the effectiveness of the disclosure controls and procedures,
        as of the end of the period covered by this report based on such
        evaluation; and

        c)  Disclosed in this report any change in the registrant's internal
        control over financial reporting that occurred during the
        registrant's most recent fiscal quarter that has materially affected,
        or is reasonably likely to materially affect, the registrant's
        internal control over financial reporting; and

5.  The registrant's other certifying officer(s) and I have disclosed, based
    on our most recent evaluation of internal control over financial
    reporting, to the registrant's auditors and the audit committee of
    registrant's board of directors (or persons performing the equivalent
    functions):

        a)  All significant deficiencies and material weaknesses in the
        design or operation of internal control over financial reporting
        which are reasonably likely to adversely affect the registrant's
        ability to record, process, summarize and report financial
        information; and

        b)  Any fraud, whether or not material, that involves management
        or other employees who have a significant role in the registrant's
        internal control over financial reporting.

Date:  November 12, 2007




                                               /s/ W. Brent LaGere
                                               --------------------------------
                                               W. Brent LaGere
                                               Chairman of the Board and
                                               Chief Executive Officer

                                                                 EXHIBIT 31.1
                                                                  (CONTINUED)

                                  CERTIFICATIONS

I, Mark C. Hart, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of Chandler (U.S.A.),
    Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement
    of a material fact or omit to state a material fact necessary to make
    the statements made, in light of the circumstances under which such
    statements were made, not misleading with respect to the period covered
    by this report;

3.  Based on my knowledge, the financial statements, and other financial
    information included in this report, fairly present in all material
    respects the financial condition, results of operations and cash flows
    of the registrant as of, and for, the periods presented in this report;

4.  The registrant's other certifying officer(s) and I are responsible for
    establishing and maintaining disclosure controls and procedures (as
    defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
    registrant and have:

        a)  Designed such disclosure controls and procedures, or caused
        such disclosure controls and procedures to be designed under our
        supervision, to ensure that material information relating to the
        registrant, including its consolidated subsidiaries, is made known
        to us by others within those entities, particularly during the
        period in which this report is being prepared;

        b)  Evaluated the effectiveness of the registrant's disclosure
        controls and procedures and presented in this report our
        conclusions about the effectiveness of the disclosure controls
        and procedures, as of the end of the period covered by this report
        based on such evaluation; and

        c)  Disclosed in this report any change in the registrant's internal
        control over financial reporting that occurred during the registrant's
        most recent fiscal quarter that has materially affected, or is
        reasonably likely to materially affect, the registrant's internal
        control over financial reporting; and

5.  The registrant's other certifying officer(s) and I have disclosed, based
    on our most recent evaluation of internal control over financial
    reporting, to the registrant's auditors and the audit committee of
    registrant's board of directors (or persons performing the equivalent
    functions):

        a)  All significant deficiencies and material weaknesses in the design
        or operation of internal control over financial reporting which are
        reasonably likely to adversely affect the registrant's ability to
        record, process, summarize and report financial information; and

        b)  Any fraud, whether or not material, that involves management or
        other employees who have a significant role in the registrant's
        internal control over financial reporting.

Date:  November 12, 2007



                                               /s/ Mark C. Hart
                                               --------------------------------
                                               Mark C. Hart
                                               Senior Vice President - Finance,
                                               Chief Financial Officer
                                               and Treasurer