Regulatory
Citation(s):
78.83c. Intermediate and production casing.
(b)
If the well is to be equipped with an intermediate casing, centralizers shall
be used…
(c)
If the production casing is cemented in place, centralizers shall be used…
Question:
Do operators need to use store-bought
centralizers or can they make their own?
Response:
The
regulations do not specify whether centralizers must be purchased from an
established manufacturer or if they can be fabricated by the
driller/operator. Therefore, any
centralizers can be used provided they function effectively as centralizers,
i.e., they are capable of keeping the casing string centralized within the
wellbore, do not impede or cause bridging of cement, and are sufficiently
durable that they will not malfunction when casing is being run or cemented.