Products
TRANSFER
Transfer
TRANSFER multifunctional sub with stabilizing floating sections. Run in the open hole to damp vibrations and protect the drill pipe and BHA components.
About
Transfer lineup — operating effect
Stabilizing sections are kinematically decoupled. BHA-only — cuts torsional and axial shocks at the bit.
STICK-SLIP INDEX
−68%
SSI reduction
WOB
+2.5 t
WOB lift
ROP
+21%
ROP lift
How it works
01
Kinematically decoupled stabilizer
Stabilizing sections rotate and shift radially relative to the body. No reactive lateral load transferred to the drill string.
Design
02
Composite-reinforced bearing module
Adaptive floating bearing section reinforced with composite rings. Damps axial and torsional shocks.
Hydraulics
03
Constant flow ID
Low pressure drop inside the sub. No impact on mud flow rate or mud motor operation.
Sizes
| Parameter | 89 | 102 | 127 |
|---|---|---|---|
| Length, mm | 1225 | 1225 | 1225 |
| Body OD, mm | 127.0 | 136.7 | 168.3 |
| OD across blades, mm | 136.7–152.4 | 142.9–152.4 | 212.7 |
| Wall thickness, mm | 10.4 | 10.4 | 12.7 |
| Hydraulic diameter, mm | 134.1–147.6 | 138.7–147.6 | 203.2 |
| Max lateral load, kgf | 3500 | 3500 | 3500 |
| Service life, M revolutions | 5 | 5 | 5 |
When to use
- 01
BHA only — no surface Transfer sections
- 02
Drilling with high WOB
- 03
Suppress stick-slip and axial shocks at the bottom of the string
- 04
Protect PDC bits from cutter chipping
We reply within a day
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