taking barrels apart???

[1965 wite]

i have a old 3 gallon bourbon barrel that has been used to age a few different cocktails. its been sitting full of water for a while now and when i emptied it out some weird fungus or mold came out with the water. Not a lot of it but a few chunks. I am thinking about trying to take it apart to clean and rechar the inside. anybody ever had any success taking barrels apart and them putting them back together and having them not leak?