Petrovietnam Technical Services Corporation (PTSC) is a Vietnam-based provider of oil and gas related services and equipment industry. The Company provides petroleum storage services and marine transportation services using sea-borne tankers and specialized vessels. It is also involved in the provision of engineering services, geophysical surveying and mapping services and ship repair services. Moreover, it manufactures and installs tanks and gas pipelines. The Company also offers marine port services and offshore facility management and maintenance services. Other operations include the trading of petroleum and other petrochemicals. As of December 31, 2012, the Company was a subsidiary of Vietnam National Oil and Gas Group (Petrovietnam), and it had 13 subsidiaries, three joint ventures, five affiliates, along with six branches.