Sidetracking mills designed with polycrystalline-diamond-compact (PDC) insert cutting structures are able to mill a casing window and drill a lateral in one trip. Application of this advanced PDC technology in the Fruitland formation coalbed-methane gas wells provided cost- and time-saving benefits. The full-length paper presents three case histories that illustrate how this new technology was first used in the San Juan basin to recomplete coalbed-methane gas wells.