The purpose of the surface string is to provides blowout protection during drilling. Setting depth is often chosen to isolate troublesome formations, loss zones, shallow hydrocarbons, water sands, or protects the build-up section of deviated wells.
The purpose of the surface string is to provides blowout protection during drilling. Setting depth is often chosen to isolate troublesome formations, loss zones, shallow hydrocarbons, water sands, or protects the build-up section of deviated wells.