EXHIBIT 21
SUBSIDIARIES OF THE REGISTRANT
Consolidated Subsidiaries of the Registrant
(Jurisdiction of incorporation):
         
Parker Drilling Company of Oklahoma, Incorporated (Oklahoma)
    100 %
Parker Technology, Inc. (Oklahoma)
    100 %
Parker-VSE, Inc. (formerly Vance Systems Engineering, Inc.) (Nevada)(1)
    100 %
Parker Drilling Company International Limited (Nevada)(2)
    100 %
Parker Drilling Company Limited LLC (Delaware)
    100 %
Parker North America Operations, Inc. (Nevada)(3)
    100 %
Parker Drilling Company (Bolivia) S.A. (Bolivia)
    100 %
Universal Rig Service LLC (Delaware)
    100 %
Certain subsidiaries have been omitted from the list since they would not, even if considered in the aggregate, constitute a significant subsidiary. All subsidiaries are included in the consolidated financial statements.
(1)   Parker-VSE, Inc. (formerly Vance Systems Engineering, Inc.) owns 100% of Parker Drilling Company Limited (Bahamas) and 93% of Parker Drilling Company Eastern Hemisphere, Ltd. (Oklahoma). Parker Drilling Company Limited (Bahamas) owns 7% of Parker Drilling Company Eastern Hemisphere, Ltd. (Oklahoma).
 
(2)   Parker Drilling Company International Limited owns 100% of Choctaw International Rig Corp. (Nevada); Creek International Rig Corp. (Nevada) and Parker Drilling Company of Argentina, Inc. (Nevada). It also owns 65% of Parker Drilling Eurasia, Inc. (Delaware) and 74% of Parker Drilling Pacific Rim, Inc. (Delaware).
 
(3)   Parker North America Operations, Inc. owns 100% of Parker Drilling Company North America, Inc. (Nevada); Parker USA Drilling Company (Nevada) and Parker Drilling Offshore Corporation (Nevada).*
 
*   Parker Drilling Offshore Corporation owns 100% of the following entities:
    Mallard Argentine Holdings, Ltd. (Cayman Islands)
 
    Mallard Drilling of South America, Inc. (Cayman Islands)
 
    Mallard Drilling of Venezuela, Inc. (Cayman Islands)
 
    Parker Drilling Offshore International, Inc. (formerly Mallard Drilling International, Inc.)(Cayman Islands), which owns 100% of Parker Drilling (Nigeria) Limited (Nigeria) and 100% of KDN Drilling Limited (Nigeria).
 
    Parker Drilling Offshore USA, L.L.C. (Oklahoma), which owns 100% of Parker Drilling Company of Mexico, LLC (Nevada), 98% of Parker Drilling de Mexico, SRL (Mexico), 2% of PD Servicios Integrales, SRL and 100% of Parker Enex, LLC (Delaware).
 
    Parker Technology, L.L.C. (Louisiana)
 
    Parker Tools, LLC (Oklahoma), which owns 99% of Quail Tools, L.P. (formerly Quail Tools, L.L.P.) (Oklahoma).
 
    Quail USA, LLC (Oklahoma), which owns 1% of Quail Tools, L.P. (formerly Quail Tools, L.L.P.)(Oklahoma).
*   Parker Drilling Offshore Corporation owns 98% of PD Servicios Integrales, SRL (Mexico).
 
*   Parker Drilling Offshore Corporation owns 2% of Parker Drilling de Mexico, SRL.
 
*   Parker Drilling Offshore Corporation owns 35% of Parker Drilling Eurasia, Inc. (Delaware), which owns 100% of Parker Drillserv, LLC (Delaware), 100% of Parker Drilltech, LLC (Delaware) and 99.96% of PD Offshore Holdings C.V. (Netherlands) which owns 100% of Parker 3source, LLC (Delaware) and 99.97% of PD Selective Holdings C.V. (Netherlands) which owns 100% of the following entities:
    Parker Cyprus Ventures Limited (Cyprus)
 
    Parker Drillex, LLC (Delaware)
 
    Parker Drilling AME Limited (Cayman Islands)
 
    Parker Drilling Company of New Guinea, LLC (Delaware)

 


 

    Parker Drilling Company of Sakhalin (Russia)
 
    Parker Drilling Company of Singapore, LLC (Delaware)
 
    Parker Drilling Netherlands B.V. (Netherlands)
 
    Parker Drillsource, LLC
 
    PD Labor Services, Ltd. (Cayman Islands)
 
    PD Labor Sourcing, Ltd. (Cayman Islands)
              and 99.9% of Parker Drilling Company Kuwait Limited (Bahamas).
 
*   Parker Drilling Offshore Corporation owns 26% of Parker Drilling Pacific Rim, Inc. (Delaware), which owns 100% of Parker Rigsource, LLC (Delaware) and 99% of PD International Holdings C.V. (Netherlands) which owns 100% of Parker 5272, LLC (Delaware) and 99.96% of PD Dutch Holdings C.V. (Netherlands) which owns 100% of the following entities:
    Parker Cyprus Leasing Limited (Cyprus)
 
    Parker Drilling (Kazakstan), LLC (Delaware)
 
    Parker Drilling Company International, LLC (Delaware)
 
    Parker Drilling Company of New Zealand Limited (Nevada)
 
    Parker Drilling Dutch B.V. (Netherlands)
 
    Parker Drilling International of New Zealand Limited (New Zealand)