X0101 EFFECT 33 LIVE 2010-09-02 11:00:00

S-4

0000320575 PIONEER DRILLING CO 333-168728 0001497341 Pioneer Drilling Services, Ltd. 333-168728-07 0001497880 Pioneer Global Holdings, Inc. 333-168728-06 0001497879 Pioneer Production Services, Inc. 333-168728-05 0001497878 Pioneer Wireline Services Holdings, Inc. 333-168728-04 0001497884 Pioneer Wireline Services, LLC 333-168728-03 0001497882 Pioneer Well Services, LLC 333-168728-02 0001497886 Pioneer Fishing & Rental Services, LLC 333-168728-01