There are several types of oil platforms used to extract oil and natural gas from offshore sites. Fixed platforms are anchored directly to the seabed using concrete or steel legs. Jackup platforms have legs that can be lowered to the seabed for drilling but are raised during operations. Semi-submersibles have good stability in rough seas and are commonly used for offshore drilling in deep waters. Compliant and floating platforms are connected to the seabed and can move with external forces.

2.  An oil platform, also referred to
as an offshore platform or oil rig
is a large structure facilities to
drill well and also to extract oil
and natural gas (Hydro carbons).
 They may be fixed, complaint and
floatable.

4.  These are fixed structures built
with concrete or steel legs
anchored on the sea bed.
 Gravity platforms
 Jacket platforms

8.  These are jacked up above the sea
using legs that can be lowered, much
like jacks. They are employed only for
drilling wells and in shallow waters
around 550 feet.
 The body structure and legs are
connected by RACK and PINION
mechanism.

10.  A semi-submersible is a specialized marine
vessel with good stability
and seakeeping characteristics. The semi-
submersible vessel design is commonly used in a
number of specific offshore roles such as
for offshore drilling rigs, safety vessels, oil
production platforms and heavy lift cranes.

14.  These are small in size but operates in deep
waters.
 Guyed tower
 TLP’s
 SPAR
 Articulate tower
 These are connected to sea bed allowing
them to move freely to external forces.