The Oriented Straight Sub and Oriented Bent Sub are essential tools in directional drilling, designed to work in conjunction with a bend housing motor. These subs help with well trajectory control, enabling accurate deflection, azimuth control, and side-tracking for vertical well corrections and directional drilling applications.
The Oriented Bent Sub functions as a power deflection tool, applying continuous lateral force on the drill bit, allowing it to cut the wellbore wall laterally and progress along a curved trajectory.
✔ Directional Drilling Support – Assists in well deflection, azimuth control, and trajectory correction.
✔ Optimized Wellbore Path – Ensures precise side-tracking and correction of vertical wells.
✔ Efficient Deflection Power – The oriented bent sub continuously exerts lateral force on the drill bit, allowing for smooth directional control.
✔ Simple & Reliable – Easy to use, cost-effective, and durable for extended downhole operations.
✔ Compatible with Downhole Motors – Designed to work seamlessly with bent housing motors.
🔹 Directional Drilling – Used to guide the drill bit along a planned trajectory.
🔹 Wellbore Correction – Helps correct vertical wells for better positioning.
🔹 Side-Tracking Operations – Assists in re-entry drilling and multi-lateral wellbore creation.
🔹 Torque & Azimuth Control – Enhances wellbore stability by adjusting drilling force and angle.
Oriented Sub Specifications
Oriented Straight Sub Specifications
| OD (mm/inch) |
ID (mm/inch) |
OAL (mm/inch) |
Connection |
| 104.8 (4-1/8) | 44.5 (1-3/4) | 800 (31-1/2) | NC31 B × P |
| 120.7 (4-3/4) | 57.2 (2-1/4) | 900 (35-7/16) | NC38 B × P |
| 165 (6-1/2) | 71.4 (2-13/16) | 950 (37-13/32) | NC50 B × P |
| 197 (7-3/4) | 71.4 (2-13/16) | 610 (24) | 6-5/8REG B × P |
| 203.2 (8) | 71.4 (2-13/16) | 1000 (39-3/8) | 6-5/8REG B × P |
Oriented Bent Sub Specifications
| OD (mm/inch) |
ID (mm/inch) |
Bent Angle |
Connection |
| 104.8 (4-1/8) | 32 (1-1/4) | 1°, 1.5°, 2° | NC31 B × P |
| 120.7 (4-3/4) | 50.8 (2) | 1°, 1.5°, 2° | NC38 B × P |
| 152 (5-63/64) | 71.4 (2-13/16) | 1°, 1.5°, 2° | NC46 B × P |
| 165 (6-1/2) | 71.4 (2-13/16) | 1°, 1.5°, 2°, 2.5° | NC50 B × P |
| 197 (7-3/4) | 71.4 (2-13/16) | 1°, 1.5°, 2°, 2.5° | 6-5/8REG B × P |
| 203.2 (8) | 71.4 (2-13/16) | 1°, 1.5°, 2°, 2.5° | 6-5/8REG B × P |
