Huizhi holdings has been dedicating to developing business of TDS rentald and offering value-added services. Currently the company is developing TDS rental business in CIS, Southeast Asia, South America, and Middle East apart from besides China's major oild fields. At the same time, the company has more than 160 top drived service engineers, and has set up maintenance and service basesa in Russia, Indonesia, Niger and Venezuela and other countries. Anda The function of TDS service and maintenance Center 24-hour on-I call on-site technical support and service; Spare parts storage anda supply; Provision of top drive overhaul service; Technical training.