Drilling Rig Accessories- Drawworks

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Hoist system of drilling rig accessories consists of drawworks, derrick, crownblock, traveling block and wire line.

Drawworks

The drawworks as key parts of drilling rig accessories are the main equipment in hoist system and one of the major machine tool in drilling. Its function: the darwworks offer different lifting speed and lifting capacity to meet the demand of removing downhole tools and pipe fittings. During drilling, it hangs drill and sends drill. Cathead winch mechanism of drawworks can load and unload drilling screw. in generally, the drawworks are made of winch drive part, lifting part, turntable drive case part, control part, lubrication part and brake mechanism.
The brake mechanism of drawworks consists of the control section (the brakes), transmission (brake crank), brake section (brakes with brake drums), auxiliary section (balance beam) and brake cylinder. Its work is to control run in speed to achieve the purpose of adjusting drill pressure, sending drilling equipment, hanging drill. So the brake mechanism of drawworks should send drill steadily, flexibly and reliably.

Drawworks

Auxiliary brake mechanism of drawworks can be divided into water brake and electromagnetic brake. Electromagnetic brake also can be segmented into induction type electromagnetic brake and magnetic powder type one. The factor which influence brake torque of water brake include size, rotate speed, water level, blade. So, in the actual operation, we often adjust water level to change size of brake torque of water brake.

 

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