A casing patch can be required in the following situations:
- the casing has to be set high before the casing hanger has landed, (well control requirements may dictate that an emergency slip cannot be set)
- a leak has been found in a casing string.
The following guidelines shall be used in the preparation of the casing patch programme provided by the service company:
1. Ensure that ditch magnets have been installed prior to cutting the casing.
Supporting the casing above the cut shall improve the effectiveness of . . .