TC90 Crown Block for Oilfield Drilling Rig

API Crown Block

Features of crown block:

1.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.

2.A deviation fast-line sheave.

3. The sheave cluster is tilted to counteract traveling

block’s torque. The side plate assembly is faced

with derrick man for ease of picking off & suspending

elevators.

4.The sheave grooves are intermediate frequency

quenched so as to improve surface hardness and

extend service lift of sheaves.

5.All sheaves had double-row conical roller bearings

and each bearing has individual lubricating channel.

6.The rope guard prevents the wire rope from running

out of the sheaves grooves.

7.Equipped with wooden bumper blocks and retainer net.

8.Equipped with a gin pole for use in repairing the sheaves cluster.

9.Equipped with sand line sheaves and auxiliary sheaves.

10.The sheaves and the bearing are interchangeable with those of matching travelling block.

11.The crown blocks conform to API Spec. 4F,8A/8C and API monogram is permitted to be used.

The main technical performance and specification for crown block