Concentric Casing System

  • Max. depth for borehole drilling:150 meters
  • Advantages:Drills at any angle, Good straightness of borehole etc.
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Eccentric Casing System, is suitable for drilling water wells, geothermal wells, short mircopiles,medium mini-type grouting hole of building, diamond harbour project.

Economy: Eccentric is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole.

Working Principle:

When drilling, the reamer bit will rotate out to enlarge the hole which enough for the casing tube slide down behind the reamer. When reached required depth, the drill pipe will drill to the reverse direction and the reamer bit will retract, It is allowing the whole drilling system to pass through the casing.

Eccentric Casing drill bit

Eccentric Casing drill bit

Eccentric Casing drill bit

Eccentric Casing drill bit

Eccentric Casing drill bit

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