Huifeng participated in the INTERTECH 2015 conference in the United States
Drag bits Include PDC Drag Bit and step drag bit .
They are usually designed for use in soft formations such as sand, clay, or some soft rock. Their uses include drilling water wells, mining, geothermal, environmental and exploration drilling.
Whenever possible, they should be used to drill pilot holes, for they produce cuttings are easiest to log.
Normally drag bits are 3 wings, but we can make 4 or 5 wings following your drawings or samples.
Many special designs are available upon your request.
Drag Bit Drag Bit , Drag Drill Bits , Step-Type Drag Bit , Drilling Drag Bit China Drag Bit , China Drag Drill Bits , China Step-Type Drag Bit CANGZHOU GREAT DRILL BITS CO., LTD , https://www.triconerockbits.com
INTERTECH 2015 conference is dedicated to showcasing the latest application progress and research results of industrial diamond, cubic boron nitride, CVD diamond, polycrystalline, nano-diamond and other super-hard abrasives in different industries, for international suppliers, manufacturers, research institutions, academics. Experts in the field, end users, equipment manufacturing and other fields provide a platform for discussion and exchange to promote the development of the superhard materials industry. 
