Reverse circulation is achieved by blowing air down the annulus of the rod, the differential pressure creating air lift of the water and cuttings up the inner tube which is inside each rod. It reaches the deflector.
[pdf] Reverse circulation is achieved by blowing air down the annulus of the rod, the differential pressure creating air lift of the water and cuttings up the inner tube which is inside each rod. It reaches the deflector.
[pdf] Drilling at an angle can seem difficult, but don't worry, there's several methods you can use to create angled holes. You can try some basic tricks if you don't need your angles to be too exact. Otherwise, try.
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