U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
(a) You must perform a casing diagnostic test within 30 days after first observing or imposing casing pressure according to the following table:
| If you have a . . . | you must perform a casing diagnostic test if . . . |
|---|---|
| (1) fixed platform well, | the casing pressure is greater than 100 psig. |
| (2) subsea well, | the measurable casing pressure is greater than the external hydrostatic pressure plus 100 psig measured at the subsea wellhead. |
| (3) hybrid well, | a riser or the production casing pressure is greater than 100 psig measured at the surface. |
(b) You are exempt from performing a diagnostic pressure test for the production casing on a well operating under active gas lift.
