X0202 4 2005-11-28 0 0001133260 UNION DRILLING INC UDRL 0001008024 ZIEGLER WILLIAM R 230 PARK AVENUE, 11TH FLOOR NEW YORK NY 10169 1 0 1 0 Common Stock, par value $0.01 per share 2005-11-28 4 S 0 3884011 13.055 D 9278925 I By Union Drilling Company LLC Common Stock, par value $.01 per share 138558 D The Reporting Person is the Chairman and CEO, and one of five members of the Board of Representatives, of Union Drilling Company LLC, a Delaware limited liability company ("UDC LLC"). The Reporting Person disclaims beneficial ownership of the shares of common stock sold and/or owned by UDC LLC, except to the extent of any pecuniary interest that he has in such shares through other entities that hold membership interests in UDC LLC. /s/ William R. Ziegler 2005-11-28