Common Defects and Defects of Oil Casing Thread


1. Black top oil casing threads
2. Wire Break
3. Burrs
4. tremor
5. Max
6. Score threads
7. Dimples, indentations
8, below standard thread height
9, Flash
10, tear
11. Kamid is not enough. The slope fails.
12, numb thread
13. Casing malformation buckle