MLchartDataset catalogue

Breakout cathead

Term · Oil and gas · MLC-T-OAG-000451

A clutch-engaged spool on the catshaft of the drawworks, usually on the side opposite the driller, that uses drawworks power to pull a line attached to the breakout tongs. That pull applies the high torque needed to unscrew a drill pipe connection when pipe is racked back. It differs from the makeup cathead, which handles the tightening of connections.

Table 1. Record
IdentifierMLC-T-OAG-000451
FieldOil and gas
SubjectDrilling
Record as JSON 
{
  "id": "MLC-T-OAG-000451",
  "term": "Breakout cathead",
  "field": "Oil and gas",
  "definition": "A clutch-engaged spool on the catshaft of the drawworks, usually on the side opposite the driller, that uses drawworks power to pull a line attached to the breakout tongs. That pull applies the high torque needed to unscrew a drill pipe connection when pipe is racked back. It differs from the makeup cathead, which handles the tightening of connections.",
  "subject": "Drilling",
  "url": "https://mlchart.com/terminology/oil-and-gas/breakout-cathead/"
}

Record 484 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.