EXHIBIT 23
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No.
File No. 33-57345, 333-59132, 333-70444, 333-41369, 333-84069 and 333-99187 and 333-124697) and
Form S-3 (File No. 333-131066) of Parker Drilling Company of our report dated February 28, 2007
relating to the financial statements, financial statement schedule, managements assessment of the
effectiveness of internal control over financial reporting and the effectiveness of internal
control over financial reporting, which appears in this Form 10-K.
Houston, Texas
February 28, 2007