Methods for wellhead workover

Abstract

The method includes providing a wellhead comprising a first casing spool and an extended tubing spool disposed above the first casing spool, and a production tree comprising a wing valve disposed above the extended tubing spool. The method further includes decoupling the extended tubing spool from the wellhead, coupling a replacement tubing spool and an additional casing spool below the replacement tubing spool to the wellhead replacing the extended tubing spool. A combined length of the replacement tubing spool and the additional casing spool is the same as the length of the extended tubing spool. The method further includes maintaining a consistent vertical length between the first casing spool and the wing valve while replacing the extended tubing spool with the replacement tubing spool and the additional casing spool.

Dependencies are inferred from the claim text.