Drilling Reamer Ⅱ

This drilling reamer enables the operator to simultaneously drill and ream generally below the casing.

The reamer blocks are hydraulically actuated. Hydraulic differential pressure acts on a piston that drives the cutter blocks open.

When the piston chamber opens for cutter block deployment, the drilling fluid will flow out of the jet nozzles, providing a pressure drop that indicates at the surface that the reamer is open.

 

Applications

Shoe-track drilling when cement must be cleared from casing

Post-shoe-track drilling in formations that require enhanced stabilization

Hole enlargement while drilling

The reamer has achieved success in a wide range of challenging applications, including

• Directional drilling
• Extended-reach drilling
• Strong back-reaming capability
• Highly abrasive formations

 

Advantages

Reliable hydraulic actuation to ensure a full-gauge concentric wellbore

Dependable cutter block retraction to avoid stuck BHAs

Aggressive PDC cutter blocks for higher ROP in a wide range of formation types

Integral backreaming capability to ensure construction of a full-diameter bore

Integrated jet nozzle and flow paths to improve cleanout while drilling

 

Specifications