We are Chengdu History Petroeum Technology Co., Ltd( CDHP) specializes in R& D, production and technical support for various PDC bits, tricone bits, diamond bits and supply drill pipes also well....
Chengdu History Petroleum Technology Co., Ltd.( CDHP) specializes in R& D, production and technical support for precious PDC bits, tricone bits, diamond bits and can supply drill pipes and well....
Sichuan Linray Industrial Co., Ltd. is located at one of important cemented carbide area in China, it is about 100 km from chengdu or zigong. it specialize in cemented carbide products for many years....