Types of offshore rigs

A flat-bottomed rig, used in shallow water.

• jack-up rig

• drilling barge

• drillship

• semi-submersible rig

a rig which has two hulls and at least

three vertical legs through the hulls.

• jack-up rig

• drilling barge

• drillship

• semi-submersible rig

a light platform designed to sway with

the wind, waves and currents.

• jack-up rig

• drilling barge

• drillship

• compliant platform

a platform held in position by heavy

weights connected to hollow steel tubes.

• tension-leg platform

• drilling barge

• drillship

• compliant platform

a platform which has steel legs that sit on

the seabed, held by concrete piles.

• tension-leg platform

• drilling barge

• steel-jacket platform

• compliant platform

a platform with a steel-reinforced concrete

base, held to the seabed by gravity.

• tension-leg platform

• drilling barge

• steel-jacket platform

• gravity-base

  fixed production platform

a ship with a drilling rig mounted in

the center.

• tension-leg platform

• drilling barge

• steel-jacket platform

• drillship

a rectangular shaped platform floated with

pontoon below the surface of the water.

• tension-leg platform

• semi-submersible rig

• steel-jacket platform

• drillship