Drilling reamer Ⅰ

This is a concentric mass-balance underreamer , which has several innovative design features to maximize operational efficiency and flexibility and reduce costs.

It has 6 series with dozens of opening diameters, capable of enlarging holes up to 25% beyond bit diameter during hole enlargement operations.

The versatile tool can underreaming-while-drilling with rotary-steerable system ( RSS ) or rotary bottomhole assembly, saving rig time and associated costs.

 

Applications

Expanding existing pilot holes

Underreaming below casing with tight restrictions

Optimizing cement jobs

Facilitating solid expandable installations, openhole , gravel-pack, and oversized liner completion

Advantages

Durable PDC cutting structure offers high impact strength and erosion resistance

Cutter blocks are engineered to be specified opening diameter, enabling consistent cutting structures

The balanced, concentric design minimizes vibration while drilling

Activated mechanically with a drop-ball mechanism, enhance the reliability of operation

Special indicator assembly indicates when the cutter arms are fully extended 

 

Specifications