solved Write a summary of the case as introduction of your

Write a summary of the case as introduction of your paper
Why offshore drilling?
Offshore drilling typically used three types, what are the three types of offshore drilling?
What was the reason for the fall of the company’s stock in 2014? Was the fall of the company’s stock related to the movement of Global Oil prices?
Was collaboration with Chevron a wise move for the company?
What were the challenges:

Competition in the market including the supply of shale oil, 
Technological challenges, and 
Dealing with fluctuations in the international oil prices