Main Specifications
Standards | API Spec 4F, API Spec 8C |
Maximum hook loads | 900 kN-6,750 kN ( lbs-1,488,400 lbs) |
Number of sheaves | 5-9 |
Designed to withstand highest loads, a Sovonex™ crown block assembly is the true crown on every rig. Single-piece sheaves with hardened sheave grooves, heavy-duty bearings, and mounted on a rugged steel alloy platform provide the stability needed for tough drilling operations.
Standards | API Spec 4F, API Spec 8C |
Maximum hook loads | 900 kN-6,750 kN ( lbs-1,488,400 lbs) |
Number of sheaves | 5-9 |
Sovonex™ crown blocks are strictly manufactured to the latest edition of API 4F and API 8C and authorized to carry the API monogram. We use them on all of our land drilling rigs, mobile rigs, and self-propelled workover rigs due to their reliability.
In addition to the main sheaves and a sand-line sheave, a Sovonex™ crown block assembly is are also equipped with a large fast line sheave and two sets of smaller sheaves for the auxiliary winches.
Sheaves are machined from an integral steel alloy body and subsequent heat treatment to eliminate rim cracks and enhance stability. Sheave grooves further undergo medium frequency hardening which significantly reduces wear from the wireline. Individually mounted on heavy-duty tapered roller bearings, each sheave rotates nearly frictionless.
Model | Max. hook load kN (lbs) | Wireline Ø mm (in) | Sheave OD mm (in) | Number of sheave | Dimensions (LxWxH) mm |
---|---|---|---|---|---|
CB30 | 300 (66000) | 24 (1 5/16) | 475 (18 3/4) | 4 | 738×472 ×575 |
CB50 | 500 (110000) | 24 (1 5/16) | 610 (24) | 5 | 860×670 ×588 |
CB90 | 900 (200000) | 26 (1) | 660 (26) | 5 | 1208×1092 ×1207 |
CB135 | 1350 (300000) | 29 (1 1/8) | 1005 (40) | 5 | 2320×1436 ×1781 |
CB170 | 1700 (374000) | 29 (1 1/8) | 1005 (40) | 6 | 2668×2460 ×1855 |
CB225 | 22250 (500000) | 32 (1 1/4) | 1120 (44) | 6 | 2668×2709 ×2469 |
CB315 | 3150 (700000) | 35 (1 3/8) | 1270 (50) | 7 | 3112×2783 ×2800 |
CB450 | 4500 (1000000) | 38 (1 1/2) | 1524 (60) | 7 | 3407×2722 ×2856 |