How a rig works

An offshore drilling rig is a giant floating workshop. The crew drill a very deep, very thin hole under the sea to find oil and gas.

The Driller

Five simple steps

Read it together. Switch on the grown-up facts for the extra detail.

1

The derrick lifts

The tall tower is like a giant crane that lifts long steel pipes, one after another, and screws them together.

Grown-up fact: The pipe joints are about 9 to 13 metres long. A well can go down several kilometres, so the drill crew connect hundreds of joints.

2

The drill spins

A drill bit on the end of the pipe spins and grinds through rock, a little bit at a time.

Grown-up fact: Drilling mud is pumped down the pipe. It cools the bit, carries rock cuttings back up and holds back the pressure underground.

3

The crew keep it running

Everyone has a job, from the Mechanic fixing pumps to the Camp Boss cooking dinner. A rig never stops.

Grown-up fact: Rigs work around the clock. Crews usually do 12-hour shifts, day or night, for two weeks or more at a time.

4

Crew change by helicopter

The rig is far out at sea, so the crew fly out and home by helicopter, landing on the helideck.

Grown-up fact: Before flying offshore, workers train in sea survival, including how to escape a helicopter in water.

5

Safety first, always

If the alarm sounds, everyone goes straight to their muster point, where every pig is counted.

Grown-up fact: Rigs hold regular drills, so every person knows their muster point, their lifeboat seat and their job in an emergency.