Develop and run a test with deformed casing where a load is applied to the casing throughout the test much as it would be down hole. Set the frac plug in the deformed casing and complete a pressure test while the load is continuously applied and monitored.
The 360 PSC was tested in 4.5”13.5 ppf casing and the 340 PSC was tested in 4.5” 15.1 ppf casing. The oval casing tests were performed twice in each size case, once at 2.5% ovality and once at 5% ovality.
In all four test cases the PSC plugs held 10,000 psi for one hour in deformed casing. Upon post-test inspection the 2.5% ovality tests revealed little difference from typical tests. Slips and cones from 5% ovality tests had evidence of uneven loading; the peak pressure capability of the plug was compromised however PurpleSeal plugs still met the max treatment pressure requirement of 10,000 psi.
2.5% and 5.0%