X0202 4 2007-04-24 0 0000060849 LUFKIN INDUSTRIES INC LUFK 0001185394 TROUT H J JR 12335 KINGSRIDE #147 HOUSTON TX 77024 1 0 0 0 COMMON STOCK 2007-04-24 4 S 0 1000 62.50 D 381804 D COMMON STOCK 2007-04-24 4 S 0 2000 63.00 D 379804 D COMMON STOCK 2007-04-24 4 S 0 1000 63.50 D 378804 D H. J. Trout, Jr. 2007-04-26