Good day, I have tried breaking down the questions so as to enable understanding.

Briefly discuss the well barrier issues associated with drilling a subsea well (i.e. a subsea wellhead), using a jack-up rig compared to using a semisubmersible.

(c) Briefly discuss the well engineering steps required at the planning stage of subsea well drilling to avoid hazard or minimize their effect.

(d) Identify the formation damage risks for the primary and secondary reservoirs, and discuss the well engineering steps required to mitigate these risks.

Describe the differences in design and installation between hydraulic-set and mechanically-set  liner hangers.

Give examples of reservoir properties which influence the completion design, and explain how the completion is affected.

Describe types of lower completion that are commonly used for production wells. Briefly describe the pros and cons for each design.