Drilling Rig Crown Blocks

Drilling Rig Crown Blocks

Standard of crown blocks: API Spec 4F;
Strucutre: crown basement, fast-line sheave, dead-line sheave, main sheave, sand-line sheave,
drillng line protector and sheaves for hydraulic and air winch, bumper wood for the crown-o-matic and guardrail.
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Product Details

1. The standards of drilling rig crown blocks

The crown blocks complies with API Spec 4F, and conforms to the SY/T5527 standard. 


2. The structure and parameters of drilling rig crown blocks

The crown block consists of crown basement, fast-line sheave, dead-line sheave, main sheave, sand-line sheave, drilling line protector and sheaves for hydraulic and air winch, bumper wood for the Crown-O-Matic and guardrail. It’s designed with closed type and open type. The traveling system 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 adopts centralized lubrication for convenient operation.


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