M-13.1, r. 1 - Regulation respecting petroleum, natural gas and underground reservoirs

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24. A well drilling licensee shall make sure during drilling operations that casings and their cementation:
(1)  insulate all the geological horizons encountered containing water, oil or gas;
(2)  prevent any migration of oil, gas or water from one geological horizon to another;
(3)  can support any bursting, crushing, tension and any other physical stress to which they may be subjected.
O.C. 1539-88, s. 24.