Conductor string is a string which is installed to cover unconsolidated formations, to seal off shallow water sands and to provide protection against shallow gas flows. The string is cemented to the surface or sea bed if possible, and is always the first string onto which one or more BOPs are installed.
- prevent poorly consolidated formations from sloughing into the hole
- provide a full mud-circulation system,
- protect fresh water sands from contamination by the drilling mud
- provide protection against shallow hydrocarbons.
This string is . . .