What are the three main types of drilling rigs? The three main types of drilling rigs are:

   1. Land Rigs – These are used for drilling onshore and vary in size and capability, from small mobile rigs for shallow wells to large, complex rigs for deep drilling.

   2. Offshore Rigs – These are used for drilling in bodies of water and include several subtypes such as jack-up rigs, semi-submersible rigs, and drillships, each suited to different water depths and conditions.

   3. Portable or Mobile Rigs – These include truck-mounted, trailer-mounted, and helicopter-transportable rigs, designed for quick deployment and drilling in remote or hard-to-reach locations.

   Each type is selected based on factors such as the location, depth, and purpose of the drilling operation.