Specifications

Overburden Drilling System
1.Efficient energy transfer
2.Faster drilling speed
3.Lower oil consumption

Symmetric Overburden Drilling System(NOD90):

1. 10 years manufacturing experience;

2. Certificate: ISO9001:2008

3. Material: Carbide

 

Eccentric Reamer System Step-by-step

 

1. When drilling starts, the reamer swings out and reams the pilot-hole wide enough for the casing tube to slide down behind the drill bit assembly.

 

2. When the required depth is reached, rotation is reversed carefully, whereupon the reamer swings in , allowing the drill bit assembly to be pulled up through the casing.

 

3. Casing tubes that are to be left in the drill hole should be sealed at the bottom of the hole by means of cement grout or some other sealing agent.

 

4. Drilling continues to the desired depth in the bedrock using a conventional drill string.

 

 NOD90  Symmetric Overburden Drilling System

 

 

  

Our advantages:

 

We have advanced production equipments & talented researchers & technicians & rich experiences in R & D and production.
We use the best quality raw materials.
We adopt advanced production technology & strict testing procedure.
We passed ISO9001 quality management system certification.
We accept OEM manufacturing and produce on your design.