It can be divided into two categories according to mobility:
1. Fixed drilling platform
2. Mobile drilling rig (downhole drilling rig, self-elevating drilling rig, semi-submersible drilling rig, floating drilling ship, foot type, air cushion type)< /p>
According to the drilling method, it can be divided into:
1. Platforms used: semi-submersible, pontoons, tension leg type
2. Rigs used for stable (stable) drilling: fixed, self-elevating, bottom seated
What you said I I don't know how to distinguish the 3 types, I hope you will adopt them !