Oil Rig Equipment Oil Well Lifting Equipment API 4F Crown Block
The 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.
Features
* 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 derrick man 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. |
