Exhibit 16.1 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 May 7, 2002 Ladies and Gentlemen: We have read the second and third paragraphs of Item 4 included in the Form 8-K dated May 7, 2002 of Lufkin Industries, Inc. to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP Arthur Andersen LLP cc: Mr. R.D. Leslie, Vice President, Chief Financial Officer, Treasurer