X0101 EFFECT 33 LIVE 2009-10-14 11:00:00

S-4

0001109189 BASIC ENERGY SERVICES INC 333-161693 0001448567 JS Acquisition LLC 333-161693-20 0001448564 JetStar Holdings, Inc. 333-161693-19 0001448566 Acid Services, LLC 333-161693-18 0001448563 JetStar Energy Services, Inc. 333-161693-17 0001448593 Sledge Drilling Corp. 333-161693-16 0001471139 Permian Plaza, LLC 333-161693-15 0001448584 Xterra Fishing & Rental Tools Co. 333-161693-14 0001368910 Basic Energy Services GP, LLC 333-161693-13 0001368909 Basic Energy Services LP, LLC 333-161693-12 0001368911 Basic Energy Services L.P. 333-161693-11 0001368912 Basic ESA, Inc. 333-161693-10 0001448592 Chaparral Service, Inc. 333-161693-09 0001368915 Basic Marine Services, Inc. 333-161693-08 0001368916 First Energy Services CO 333-161693-07 0001448590 Hennessey Rental Tools, Inc. 333-161693-06 0001368918 Oilwell Fracturing Services, Inc. 333-161693-05 0001448589 Wildhorse Services, Inc. 333-161693-04 0001368917 LeBus Oil Field Service Co. 333-161693-03 0001368922 Globe Well Service, Inc. 333-161693-02 0001368923 SCH Disposal, L.L.C. 333-161693-01