Hejian City, Vientiane Drilling Machinery Co., Ltd. is a leading oilfield; mine; wells and other industrial and agricultural construction mining accessories provide professional services companies; business scope includes cone bit ( Jianghan; Chuan Shi; Li Lin; Mihara ), Tricone tipped drill bit; tricone steel tooth bit; cone palm sheet; large diameter drill assembly; air drill; reverse circulation drill; drill wells; oil drill; assembly drill; PDC drill bits; rock reamer; PDC PDC drill bit; three-wing concave; scraper