The following companies are subsidiares of Halliburton: Geophysical Services Inc., HESI Holdings B.V., Hal Global Netherlands Cooperatief U.A., Halliburton (Barbados) Investments SRL, Halliburton AS, Halliburton Affiliates LLC, Halliburton Affiliates Services LLC, Halliburton Canada Holdings B.V., Halliburton Canada ULC, Halliburton Energy Cayman Islands Limited II, Halliburton Energy Services Inc., Halliburton Far East Pte Ltd, Halliburton Global Affiliates Holdings B.V., Halliburton Group Canada, Halliburton Holdings (No.3), Halliburton Holdings LLC, Halliburton International B.V., Halliburton International Holdings, Halliburton Manufacturing and Services Limited, Halliburton Mediterranean Limited, Halliburton Netherlands Holdings B.V., Halliburton Partners Canada ULC, Halliburton Produtos Ltda., Halliburton Technology Inc., Halliburton U.S. International Holdings Inc., Halliburton Worldwide GmbH, Halliburton de Mexico S. de R.L. de C.V., Intelligent Well Controls, Knowledge Systems Inc., Landmark Graphics, Landmark Graphics Corporation, Landmark Technology Holdings Inc., Magic Earth, Multi-Chem Group, Oilfield Telecommunications LLC., PSL Energy Services, Permedia Research Group, Pinnacle Technologies Inc., Protech Centerform, Red Spider, SensorTran, Summit ESP, Ultraline Services Corp., and WellDynamics.