RE:Lol..walnut shells and micaWallnut shells and mica are types of LCM or lost circulation materials that I mentioned in a post referring to a 50 bbl LCM sweep. So Dfly knows operations.
Ok now you can arrange 4 numbers in 24 different ways: 1234, 1243, 1324, 1342, 1423, 1432, 2134, 2143 and so on. So they lost circulation at what depth?