§ 250.521. When do I have to perform a casing diagnostic test?
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/us/cfr/t30/s§ 250.521·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(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. ``` \[76 FR 64462, Oct. 18, 2011. Redesignated at 77 FR 50894, Aug. 22, 2012\]