- hole opener
- 2017-01-13 22:03
- Horizontal Hole Openers, also known as HDD Reamers, are used to enlarge the pilot hole inHorizontal Directional Drilling
- pilot bits
- 2017-01-13 22:03
- Formations: long intervals of very soft poorly compacted shales ,sandstone, clays, salts and soft li mestones. Size and
- steel teeth roller cones pilot bit
- 2017-01-13 22:03
- our company can supply all kinds of tricone bits to you for hole drilling.All bits have high quality and low price.118--