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Crown Blocks
We can provide customers with various types of crown blocks for drilling and workover operation.
The safety coefficient conforms to API & A specification.
Design Features:
The retaining bar can prevent wirelines from jumping in or jumping off out of sheave grooves. Sheave groove sizes conform to API 8A specification and are medium-frequency induction hardened, prolonging the sheave service life.
Sheave bearings are lubricated individually with the grease cup at the shaft end.
Sheaves and bearings of the crown block may be interchanged with those of the traveling block. |
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TC450 Crown Block |
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Main Technical Parameters of Crown Blocks |
| Model |
TC-30 |
TC-50 |
TC-90 |
TC-135 |
TC-170 |
TC-225 |
TC-315 |
TC-450 |
TC-585 |
| Max. hook load |
kN
(lbs) |
300
(66,000) |
500
(110,000) |
900
(200,000) |
1,350
(300,000) |
1,700
(374,000) |
2,250
(500,000) |
3,150
(700,000) |
4,500
(1,000,000) |
5,850
(1,300,000) |
| Wireline diameter |
mm(in) |
<=24
(<=15/16) |
<=24
(<=15/16) |
26(1) |
<=29
(<=11/8) |
29
(11/8) |
32
(11/4) |
35
(13/8) |
38
(11/2) |
42
(15/8) |
| Sheave O.D. |
mm(in) |
475
(183/4) |
610
(24) |
660
(26) |
1,016
(40) |
1,016
(40) |
1,120
(44) |
1,270
(50) |
1,524
(60) |
1,524
(60) |
| Sheave no |
|
4 |
5 |
5 |
5 |
6 |
6 |
7 |
7 |
8 |
| Overall dimensionsmm (in) |
length |
738
(29) |
860
(337/8) |
1,208
(479/16) |
2,320
(9111/32) |
2,668
(105) |
2,667
(105) |
3,112
(123) |
3,407
(134) |
2,950
(116) |
| width |
472
(185/8) |
670
(267/16) |
1,092
(43) |
1,436
(5617/32) |
2,460
(97) |
2,709
(107) |
2,783
(110) |
2,722
(107) |
2,500
(98) |
| height |
575
(225/8) |
588
(231/8) |
1,207
(471/2) |
1,781
(701/2) |
1,855
(73) |
2,469
(97) |
2,800
(110) |
2,856
(112) |
2,000
(79) |
| Weight |
Kg
(lbs) |
245
(540) |
464
(1,023) |
1,500
(3,307) |
2,775
(6118) |
4,540
(9,988) |
5,270
(11,594) |
7,600
(16,720) |
9,750
(21,450) |
8,000
(17,637) |
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