1 [DAILEY INTERNATIONAL INC. LETTERHEAD] February 20, 1998 Re: Dailey International Inc. and Subsidiary Guarantors Withdrawal of Registration Statement on Form S-4 Registration Nos. 333-38203, 333-38203-01, 333-38203-02, 333-38203-03, 333-38203-04, 333-38203-05, 333-38203- 06, 333-38203-07, and 333-38203-08 - -------------------------------------------------------------------------------- Securities and Exchange Commission 450 Fifth Street, N.W. Judiciary Plaza Washington, D.C. 20549 Ladies and Gentlemen: Pursuant to Rule 477 under the Securities Act of 1933, each of the undersigned (the "Companies") hereby requests that its Registration Statement on Form S-4 for Dailey International Inc.'s ("Dailey") 9 3/4% Senior Notes due 2007, Series B (the "Registration Statement")(Reg. Nos. 333-38203, 333-38203-01, 333-38203-02, 333-38203-03, 333-38203-04, 333-38203-05, 333-38203-06, 333-38203-07 and 333-38203-08), be withdrawn. Pursuant to the Registration Statement, the Companies registered $115,000,000 aggregate principal amount of Dailey's 9 3/4% Senior Notes due 2007, Series B (the "Notes"), with a maximum aggregate offering price of $120,750,000 in connection with Dailey's Offer of Exchange. The Commission never declared the Registration Statement effective. Dailey has reacquired all of the Notes due and none of the Notes have been or will be issued or sold under the Registration Statement. Each of the Companies requests that the Commission consent to this withdrawal. Very truly yours, DAILEY INTERNATIONAL INC. By: /s/ William D. Sutton ---------------------------- William D. Sutton Senior Vice President, General Counsel and Corporate Secretary 2 DAILEY ENERGY SERVICES, INC. By: /s/ David T. Tighe ---------------------------------- David T. Tighe Vice President (Principal Financial and Accounting Officer) DAILEY INTERNATIONAL SALES CORPORATION By: /s/ David T. Tighe ---------------------------------- David T. Tighe Vice President (Principal Financial and Accounting Officer) COLUMBIA PETROLEUM SERVICES CORP. By: /s/ David T. Tighe ---------------------------------- David T. Tighe Vice President (Chief Financial and Accounting Officer) INTERNATIONAL PETROLEUM SERVICES, INC. By: /s/ David T. Tighe ---------------------------------- David T. Tighe Vice President (Principal Accounting Officer) 3 DAILEY ENVIRONMENTAL REMEDIATION TECHNOLOGIES, INC. By: /s/ David T. Tighe ---------------------------------------- David T. Tighe Vice President (Principal Financial and Accounting Officer) DAILEY WORLDWIDE SERVICES, CORP. By: /s/ David T. Tighe ---------------------------------------- David T. Tighe Vice President (Principal Financial and Accounting Officer) AIR DRILLING INTERNATIONAL, INC. By: /s/ David T. Tighe ---------------------------------------- David T. Tighe Vice President AIR DRILLING SERVICES, INC. By: /s/ David T. Tighe ---------------------------------------- David T. Tighe Vice President