Description
Crown Block
Crown Block is a fixed pulley block installed on the top
of the derrick and is one of the important components
of the drilling rig lifting system.It is connected traveling
block with wire line to form a pulley system,which
can greatly reduce the tension of the fast rope, thus
greatly reducing the load of the drilling rig draw
works in various drilling operations (trip,running
casing,drilling,hang drilling tool), and reducing the
power of the engine group
Features:
- The crown block is designed and manufactured in accordance with API4F and 8C standard, and have the right to use API symbol.
- Standard meets SY/T5527 requirements.
- After quenching pulley groove is anti-abrasive and has long service life.
- Stick and groove for rope will prevent wireline from drop out.
- Equipped with anti-collision cushion board and protective screening.
- Lifting plate for maintenance of crown block.
- Sand pulley and subsidiary assembly pulley shall deploy according to customers requirements.
- Pulley and bearing of Crown block can interchange with allied travelling block.
Technical parameter:
| Model | TC135 | TC170 | TC225 | TC315* | TC315 | TC450 | TC585 |
| Maximum hook load KN | 1350 | 1700 | 2250 | 3150 | 3150 | 4500 | 5850 |
| Sheave ODÂ mm (in) |
915(36) | 1005(40) | 1120(44) | 1120(44) | 1270(50) | 1524(60) | 1524(60) |
| Sheave number | 5 | 6 | 6 | 7 | 7 | 7 | 8 |
| Diameter of steel wire rope mm(in) |
29(1 1/8) | 29(1 1/8) | 32(1 1/4) | 32(1 1/4) | 35(1 3/8) | 38(1 1/2) | 42(1 5/8) |
| Dimension L W HÂ mm |
2500 2050 1920 |
2687 2150 2046 |
3200 3347 3640 |
3000 2300 2570 |
3295 2776 2514 |
3068 2906 3576 |
3070 3000 3600 |
| Weight kg |
2410 | 2917 | 5764 | 7400 | 7400 | 9500 | 12500 |