What does a drilling engineer do?
A drilling engineer is a specialist at drilling wells.  They will create a plan for drilling different types of wells - vertical and horizontal wells.  They have to have a very good understanding of the subsurface and how temperatures, pressures and depth affect the drilling of a well in real time.  They will also oversee all drilling operations and are involved in completion design, well design and well abandonment.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What does a drilling engineer do?
### Input: 
### Response: A drilling engineer is a specialist at drilling wells.  They will create a plan for drilling different types of wells - vertical and horizontal wells.  They have to have a very good understanding of the subsurface and how temperatures, pressures and depth affect the drilling of a well in real time.  They will also oversee all drilling operations and are involved in completion design, well design and well abandonment.