Complaint
BOBAN Crown Block consists of crown basement, fast-line sheave, dead-line sheave, main sheave, sand-line sheave, drilling line protector and sheaves for hydraulic and air winch, bumper wood for the Crown-O-Matic and guardrail. It's designed with closed type and open type. The traveling system is divided into 7×6, 6×5, 5×4, and 4×3, which fit to Φ7/8"~Φ1 1/2" drilling lines. The sheave groove conforms to the requirements of API RP 9B. The sheave groove surface is processed with a quenching treatment. The bearing adopts centralized lubrication for convenient operation.
* The drilling line is reeved in parallel.
* The crown frame is made of high strength steel shapes & plates. The lug plate for top drive is provided. The crown block is equipped with metal base plate, handrail, and toeboard. A ladder has an opening.
* A deviation fast-line sheave.
* The sheave cluster is titled to counteract traveling block's torque. The side plate assembly is faced with derrickman for ease of picking off & suspending elevators.
* The sheave grooves are intermediate frequency quenched so as to improve surface hardness and extend service life of sheaves.
* All sheaves have double-row conical roller bearings and each bearing has individual lubricating channel.
* The rope guard prevents the wire rope from running out of the sheave grooves.
* Equipped with wooden bumper blocks and retainer net.
* Equipped with a gain hole for use in repairing the sheaves cluster.
* Equipped with sand line sheaves and auxiliary sheaves.
* The sheaves and the bearings are interchangeable with those of matching travelling block.
* The crown blocks conform to API 4F 8A/8C.
Model | Travelling system | Drilling line diameter (in) | Load (lbf) | Main sheave diameter (in) | Fastline sheave diameter (in) | Sandline sheave diameter (in) | Overall Dimension(ft) | Self-weight(lb) |
TC60 | 3×2 | 7/8 | 134885 | 19.68 | 19.68 | 5.37×4.36×4.89 | 1305 | |
TC70 | 4×3 | 7/8 | 157366 | 24.02 | 24.02 | 4.86×2.05×2.07 | 1598 | |
TC90C | 4×3 | 1 | 202328 | 24.02 | 24.02 | 4.46×3.28×4.1 | 1764 | |
TC135 | 4×3 | 1 | 303492 | 29.92 | 36.02 | 6×4.95×4.27 | 2866 | |
TC158 | 5×4 | 1;1 1/8 | 355198 | 29.92 | 36.02 | 19.68 | 7.64×4.69×4.82 | 3263 |
TC158 | 6×5 | 1;1 1/8 | 355198 | 29.92 | 36.02 | 19.68 | 7.64×5.38×4.82 | 3472 |
*TC160 | 4×3 | 1 1/8 | 359694 | 36.02 | 36.02 | 19.68 | 2.23×3.23×3.41 | 4393 |
*TC170C | 5×4 | 1 1/4 | 382175 | 36.02 | 44.09 | 15.75 | 7.97×3.28×4.43 | 6095 |
*TC180D | 6×5 | 1 1/4 | 404656 | 36.02 | 36.02 | 8.14×2.7×3.18 | 4574 | |
*TC225 | 6×5 | 1 1/4 | 505820 | 44.09 | 50 | 8.14×2.7×3.18 | 12306 | |
TC225 | 6×5 | 1 1/4 | 505820 | 36.02 | 36.02 | 19.68 | 6.56×4.59×4.43 | 5158 |
*TC315 | 7×6 | 1 3/8 | 708148 | 50 | 60 | 30 | 12.84×10×9.24 | 19294 |
*TC450 | 7×6 | 1 1/2 | 111640 | 60 | 60 | 29.92 | 11.38×10×9.8 | 21459 |
Note: * Marked items for the mast of skid-mounted drilling rig. | ||||||||
