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
History of Tricone Bit
It was invented in Ireland in 1847 by James J. Brett who founded Bits Limited – The cornerstone of our business today.
In 1909, Howard R.Hughes, an American, obtained the first patent of tricone bit. At that time, the rotary drill used a scraper bit, which could only hit the very soft ground. The hard ground could not be scraped, so it could only use a rotary drill bit.