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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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Hoisting System 527<br />

Power output lo Rotary<br />

i Rotary Brake 2 0 x 6" (Opt<br />

Rotary Dnve Clutch<br />

Fawick 24VC650<br />

Figure 4-10. The drive group of a large DC electric rig. Note that this rig<br />

may be equipped with either two or three traction motors.<br />

1. Driller's coneole. 2. Spinning cathead.<br />

3. Sand reel. 4. Main drum (grooved). 5. Hydromatic brake. 6. Manual brakes<br />

(with inspection plates indicated).<br />

Figure 4-11. The hoist on the rig floor.

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