Signa investigates failures in all grade casings to determine what caused the issue, especially recent P-110 grade casing and connection failures. Some were due to manufacturing issues, others to errors in hole design and operational misuse. or metallurgy.
- We proved an operator did not perform a formal casing design, rather used a cookie-cutter design from an offset well.
- We showed improper casing-running resulted in excessive stresses, which caused cold-working of the steel and premature failure.
- We testified that P-110 casing is highly susceptible to acid gases such as H2S and CO2 and explained the limited P-110 envelope.