However, some time ago, there was an emergency, and the number of COVID-19 patients in Shanghai increased. For the safety of the people, our government lockdown Shanghai, nucleic acid testing for all. This means, in this order, our tricone bits cannot be sent from Shanghai. Then we need to choose another port for Marlon to ship and export. Plan B, Tianjin, Qingdao, Shenzhen, etc
Polycrystalline diamond materials, for use in polycrystalline diamond compact (PDC) bits, are one of the most important material advances for oil drilling tools in recent years. Fixed-head bits rotate as one piece and contain no separately moving parts. When fixed-head bits use PDC cutters, they are commonly called PDC bits. Since their first production in 1976, the popularity of bits using PDC cutters has grown steadily, and they are nearly as common as roller-cone bits in many drilling applications.