SMART Under Reamer offers a simple and reliable solution for expanding an existing wellbore or expanding a wellbore while drilling concentrically to provide smooth wellbore. Provides maximum durability, regardless of any operating parameters. Ideal for use with rotary steerable systems and for drilling extended reach wells. Produces a full wellbore and improves the overall level of drilling efficiency.
SMART Under Reamer designed as one -piece forged body with large expansion range to ensure a robust design with enhanced hole cleaning efficiency, tool cutting structure can be customized to match with drill bit dynamics to deliver the best performance and reliability for challenging applications. The tool is activated by a ball drop or pre-set central nozzle controlling pressure drop. The Z-pattern grooves guarantee the tool full expansion and
retraction consistently.
| SMART Under Reamer | |||
|---|---|---|---|
| Tool Series | 575 | 825 | 1175 |
Max. Tool OD (in) |
5-3/4" | 8-1/4" | 11-3/4" |
Min. Pilot Hole Size (in) |
5-7/8" | 8-3/8" | 11-7/8" |
Max Hole Opening Size (in) |
8-1/2" | 12-1/4" | 17-1/2" | Top Connection |
3-1/2" IF Box | 4-1/2" IF Box | 6-5/8" Reg Box |
Bottom Connection |
3-1/2" IF Pin | 4-1/2" IF Pin | 6-5/8" Reg Pin |
Number of Cutter Blocks |
3 | 3 | 3 |
Cutter Type |
PDC | PDC | PDC |
Cutter Size |
13 mm | 13 mm or 16 mm | 13 mm or 16 mm |
Cutter Blocks Application-formation |
Soft/Medium/Hard | Soft/Medium/Hard | Soft/Medium/Hard |
Internal Bore Diameter (in) |
1.375" | 1.375" | 2-1/4" |
Nozzles |
3 X N40 Series | 3 X N40 Series | 3 X N40 Series |
Max. Flow Rate (GPM) |
350 | 750 | 1,700 |
Standard Activation Method |
Ball Drop | Ball Drop | Ball Drop |
Optional Activation Method |
Pressure Drop | Pressure Drop | Pressure Drop |
Back Reaming Capability |
Yes | Yes | Yes |
Tensile Strength (lbs) |
775,000 | 1,010,000 | 1,700,000 |
Max. Torque Limit (ft/Lbs) |
12,000 | 30,000 | 50,000 |
Max Operating Mud Weight(ppg) |
18 | 18 | 18 |