Claim: The Integrated asset modelling tools are from different vendors including the Schlumberger (oilfield services company), Weatherford (multinational oil and gas company) and Caesar Systems.
Evidence: Schlumberger Weatherford Caesar Systems Schlumberger Limited (French: [ʃlum.bɛʁˈʒe, ʃlœ̃-) is an oilfield services company. Weatherford International plc is an American Irish-domiciled multinational oil and gas company which is one of the largest in the world.