Teamwhole concentric casing drilling systems

Usually the land surface of the earth is covered with loose, unconsolidated material such as soil, clay, 

silt, sand, gravel and boulders, which varies in depth from a few centimeters to hundreds of meters.

Use concentric system can drill this complex formation very well.

The systems are available through the whole product range the smallest being for 114 mm (4 1/2") casing and 

largest size available at the moment is for 1220 mm (48") casing.

Application Range

Applied to over burden formations with complex topographic and geological conditions,such

as gravel,fissured formation,boulder,landfill of construction refuse etc.

Drill at any angle

good  straightness of borehole

Maximum depth of borehole can reach 150 meters

Intergrated ring bit and casing shoe(permanent)

Intergrated ring bit and casing shoe with retrievable available

Solitary ring bit(permanent)