1. It is designed for mining prospecting, geological purpose. with it, we can get core sample easily.
2. It can reach to 200m depth, diameter within 4 inches. also the cheapest model to reach to 200m depth. However, if drill in some bed rock layer, it will be slowly.
3. this type could be used for small diameter water well drilling, too.
4. Normally, this type need to change some seals regularly, need much maintainence after a long time working.
5. With pushing pressure, a little easier to get core sample or break through some rock layer.
6. Work with BW-160 mud pump. which is powerful to pump all cutting out.
7. Extra configuration, electric starter, trailer, sliding system. In China, there are three versions for similar type, capacity ranges from 100m-200m. this is 200m type.
YouTube Link: https://www.youtube.com/watch?v=N5mum_RPIYE&t=1476s