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Crown Block

Stringing is done clockwise.

The crown block frame is made of highly intense materials and steel plate, equipped with top drive installing lug and metal support plate, rectangle pipe guardrail and foot retainer as well as with stair opening.

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Features of Drilling Rig Crown Blocks:

1. Working pulley group is placed leaning, which offsets the twist of travelling block and makes the lateral plate face the derrick man. It is convenient for rolling off elevator.

2. It has an bias fast line pulley.

3. Pulley groove is medium-frequency quenched to improve the surface hardness in order to prolong the service life.

4. All the pulleys are equipped with double cone roller bearing, each with independent lube pipe.

5. The rope guard prevents the wire rope from running out of the sheave grooves.

6. It is equipped with wooden bumper blocks and retainer net

7. It is equipped with a frame crane for use when repairing the sheave groups.

8. It is equipped with sand line sheaves and auxiliary sheaves.

9. The sheaves and bearings are interchangeable with those of matching travelling block.

10. The crown blocks conforms to API specification 4F and API monogram is permitted to be used.

Crown Block

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