XI‘AN ZZTOP OIL TOOLS CO.，LTD
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Oil Well Drilling Rig Components API 8A/API 4F Crown Block TC 450
The crown blocks as the part of the drilling rig is conform to API 4F standard and SY/T5527. The drilling rig crown block is composed with
crown basement, fast-line sheave, sand-line sheave, dead-line sheave, main sheave, drilling line protector and sheaves for hydraulic and air winch, bumper wood for the Crown-O-Matic and guardrail.
The traveling system of crown block 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 of crown block adopts centralized lubrication for convenient operation.
Specification of Crown Block
| Model | TC-30 | TC-50 | TC-90 | TC-135 | TC-170 | TC-225 | TC-315 | TC-450 |
| Max. Load kN (1bs) | 300 (66000) | 500 (110000) | 900 (200000) | 1350 (300000) | 1700 (374000) | 2250 (500000) | 3150 (700000) | 4500 (1000000) |
| Drilling line size mm(in) | ≦24 (15/16) | ≦24 (15/16) | 26 (1) | ≦29 (1-1/8) | ≦29 (1-1/8) | ≦32 (1-1/4) | 35 (1-3/8) | 38 (1-1/2) |
| Sheaves O.D mm(in) | 475 (18-3/4) | 610 (24) | 660 (26) | 1016 (40) | 1016 (40) | 1120 (44) | 1270 (50) | 1524 (60) |
| Number of sheaves | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 7 |
About JC Wellhead
Jingcheng Petroleum Machinery Manufacturing Co.,Ltd was established in 2008, we are specialized in design and manufacturing of the oilfield wellhead equipment. We - YCJC are a registered supplier for CNPC, GWDC, CCDC in China.
In 2012, JC wellhead jointed with ZZ TOP Oil tools to expand the international business, in order to meet the customers' various requirement, we work with other large drilling rig companies to supply the other oilfield equipments, such as drilling rig components (mud pump & parts, rotary swivel, travelling block, hook etc), handling tools ( slip, elevator, spider, casing tong, power tong, mual tong etc.) and so on.
Welcome to contact us for more information!!