CROWN BLOCKS
Design 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 . It is equipped with metal base plate, handrail, and toeboard. A ladder has an opening.
□A deviation fast-line sheave.
□The sheaves 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.
□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 gin pole 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 traveling block.
□Crown blocks conform to API Spec 4F, 8A, 8C and have the API monogram on them.
Specifications of Crown Blocks
|
Modle
|
TC135
|
TC170
|
TC225
|
TC315
|
TC450
|
TC585
|
|
Max. hook load kN
|
1350
|
1700
|
2250
|
3150
|
4500
|
5850
|
|
O.D. of sheaves
mm(in)
|
915(36)
|
1005(40)
|
1120(44)
|
1270(50)
|
1524(60)
|
1524(60)
|
|
Number of Sheaves
|
5
|
6
|
6
|
7
|
7
|
8
|
|
Dia. of wire line mm(in)
|
26 (1)
|
29 (1)
|
32(1)
|
35(1)
|
38(1 )
|
42(1)
|
|
Overall Dimension
(L×W×H) mm
|
2500×2050
×1920
|
2687×2150
×2046
|
3200×3347×3640
|
3295×2776×2514
|
3068×2906×3576
|
3070×3000×3600
|
|
Weight kg
|
2400
|
2920
|
5310
|
7400
|
9500
|
10000
|
|
