Composition and function of drilling and workover winch

Drilling winch is not only the lifting system equipment, but also the core component of the whole drilling rig, and it is one of the three major working machines of the drilling rig.

1. function

1) trip the drilling tool and run the casing;

2) control WOB and feed drilling tools during drilling;

3) Auxiliary work such as loading and unloading drilling tool threads and lifting heavy objects with the help of cat head;

4) As a speed change mechanism or an intermediate transmission mechanism of the turntable;

5) Lift and lower the derrick as a whole.

2. Structural composition

1) drum and drum shaft assembly, which are the core components of the winch;

2) Braking mechanism, including mechanical braking and water braking (electromagnetic braking);

3) Cat head and cat head shaft assembly, which are used to tightly unload threads and lift heavy objects; The winch of the heavy drilling rig also comprises a sand-fishing drum for taking out the core barrel;

4) Transmission system, which introduces and distributes power and transmits motion. For internal variable speed winch, besides transmission shaft, drum shaft and cat head shaft, it also includes chain, gear, shafting parts, and middle transmission shaft of turntable.

5) Control system, including pliers, jaws, pneumatic clutch, driller console, control valve, etc. , which is an integral part of the drilling rig control system;

6) Lubrication system, including butter lubrication, dripping lubrication, sealed transmission, splash or forced lubrication;

7) Support system, including welded frame bracket or pedestal of closed box shell.