For special geological conditions, SANY can also provide special drilling tools accordingly to improve working efficiency of the rotary drilling rigs. With different drilling tool, the piling machine is able to get the pile foundation work done in a wider range of construction projects whether it is in cities or fields.The latest special drilling tools developed by SANY are as follows:

Pilot drilling bucket

Integrate bailing bucket and barrel; The design of arc reinforcing plate, outside of reinforcing plate welded with transition bending plate; Hinge is made of high tension steel;

Applicable layers: cave, occlusal pile.

Underreaming bit

Driven by hydraulic cylinder, it can meet the requirements of different pile holes; The whole process of lowering drilling tool, drilling and lifting drilling tool is visible; the design of pressure plate is convenient for dumping slag;

It is suitable for drilling soil, highly weathered hard rock and medium weathered rock soft.

Core barrel with centralizer

Suitable for stage drilling of large diameter bore hole; The cutting teeth and roller bits are interchangeable; Centralizer supports the hole wall to avoid drilling an inclined hole;

Applicable layers: medium or slightly decomposed bedrock, hard or superhard bedrock.

Cross-shaped core barrel

Core barrel with cross-typed guide plates in thecentre; During annular cutting, guide plates mill down therocks; The capacity of soil conveying and orientation is better than common barrels;

Applicable layers: backfill, pebble layer and highly or medium decomposed dipping formation.