X0101 EFFECT 33 LIVE 2014-10-02 09:00:00

S-4

0000320575 PIONEER ENERGY SERVICES CORP 333-198422 0001497341 Pioneer Drilling Services, Ltd. 333-198422-08 0001497880 Pioneer Global Holdings, Inc. 333-198422-07 0001497879 Pioneer Production Services, Inc. 333-198422-06 0001497878 Pioneer Wireline Services Holdings, Inc. 333-198422-05 0001497884 Pioneer Wireline Services, LLC 333-198422-04 0001497882 Pioneer Well Services, LLC 333-198422-03 0001497886 Pioneer Fishing & Rental Services, LLC 333-198422-02 0001616734 Pioneer Coiled Tubing Services, LLC 333-198422-01