| SUBSIDIARY | STATE/COUNTRY | ||||
| GEODynamics, Inc. | Delaware | ||||
| GEODynamics (U.K.) Limited | United Kingdom | ||||
| Oil States Energy Services (Canada) Inc. | Alberta, Canada | ||||
Oil States Energy Services Holding, LLC. | Delaware | ||||
| Oil States Energy Services L.L.C. | Delaware | ||||
| OIS Cyprus Limited | Cyprus | ||||
| Oil States Industries, Inc. | Delaware | ||||
| Oil States Industries (Asia) Pte Ltd. | Singapore | ||||
| Oil States Industries do Brasil - Instalacoes Maritimas Ltda | Brazil | ||||
| Oil States Industries 1 B.V. | Netherlands | ||||
| Oil States Industries (India) Private Limited | India | ||||
| Oil States Industries Singapore Holdco B.V. | Netherlands | ||||
| Oil States Industries US, Inc. | Delaware | ||||
| Oil States Industries (UK) Limited | United Kingdom | ||||
| Oil States Management Inc. | Delaware | ||||
| Oil States Industries (Thailand) Ltd. | Thailand | ||||
| Oil States Skagit SMATCO L.L.C. | Delaware | ||||
| OSES International, LLC | Delaware | ||||
| Tempress Technologies, Inc. | Washington | ||||