Exhibit 23
Consent of Independent Registered Public Accounting Firm
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-118325) of Nomac Drilling Corporation of our report dated June 28, 2007 relating to the financial statements of the Nomac Drilling 401(k) Plan, which appears in this Form 11-K.
/s/ PricewaterhouseCoopers LLP |
Tulsa, Oklahoma |
June 28, 2007 |