Rotation and Fluid Circulation
The swivel lets the drill string rotate freely while drilling fluid is delivered through the central passage.
Drilling Rig Component
SL Series Drilling Swivels
An essential drilling-rig component that allows the drill string to rotate freely while simultaneously delivering drilling fluid into it. The swivel is mounted on the hook block between the hoisting system and the drilling tool, prevents the drilling line from twisting, and carries the load of the entire suspended drill string.
Position in the Rig
It is installed on the hook block between the hoisting system and the drilling tool, preventing the drilling line from twisting.
Suspended-Load Support
The swivel carries the load imposed by the weight of the entire suspended drill string.
Construction Reference
SL Drilling Swivel Structure
Section and front views show the bail, body, central pipe and drilling-hose connection arrangement.
SL Series Reference Data
Models and Technical Specifications
The source catalog lists six models. Units have been restored and aligned with the correct values for clear comparison.
SL135 / SL160 / SL170 / SL225 / SL315 / XSL450
| Parameter | Unit | SL135 | SL160 | SL170 | SL225 | SL315 | XSL450 |
|---|---|---|---|---|---|---|---|
| Max. static load | kN | 1350 | 1600 | 1700 | 2250 | 3150 | 4500 |
| US ton | 150 | 180 | 190 | 250 | 350 | 500 | |
| Dynamic load rating | kN | 1000 | 1200 | 1300 | 1600 | 2200 | 3200 |
| US ton | 110 | 135 | 145 | 180 | 250 | 360 | |
| Maximum Rotational Speed | rpm | 300 | 300 | 300 | 300 | 300 | 300 |
| Maximum Working Pressure | MPa | 35 | 35 | 35 | 35 | 35 | 35 |
| psi | 5000 | 5000 | 5000 | 5000 | 5000 | 5000 | |
| Central-Tube Bore Diameter | mm | 64 | 64 | 64 | 75 | 75 | 75 |
| in | 2.52 | 2.52 | 2.52 | 3 | 3 | 3 | |
| Drilling-Hose Connection Thread | — | 4 LP | 4 LP | 4 LP | 4 LP | 4 LP | 4 LP |
| Sub connection | — | 6 5/8 REG-LH | 6 5/8 REG-LH | 6 5/8 REG-LH | 6 5/8 REG-LH | 6 5/8 REG-LH | 6 5/8 REG-LH |
| Overall dimensions (L × W × H) | mm | 2280 × 680 × 590 | 2280 × 680 × 590 | 2250 × 820 × 835 | 2800 × 980 × 790 | 3015 × 1096 × 830 | 3015 × 1096 × 830 |
| in | 90 × 27 × 23 | 90 × 27 × 23 | 100 × 32 × 33 | 110 × 39 × 31 | 119 × 43 × 33 | 119 × 43 × 33 | |
| Weight | kg | 1500 | 1500 | 1782 | 2500 | 2700 | 2700 |
| lb | 3307 | 3307 | 3928 | 5512 | 5950 | 5950 |