All casings for wells shall be handled, set, run and cemented in place in accordance with the rules, regulations and orders of the State Geologist and in accordance with good oilfield practice. In addition to such requirements, no person shall re-enter such well for the purpose of doing additional drilling or deepening the same until not less than twentyfour hours after such casing has been cemented, provided, however, that such hole shall not be re-entered for the purpose of drilling or deepening the same until after forty-eight hours has elapsed after the cementing of the casing through which oil and gas is to be produced. At all times after the setting of the surface casing and the completion of the well, an adequate blowout preventer or other similar device of at least 4,000 p.s.i. test rating shall be properly installed and continuously maintained in good working condition. Not less than 500 feet of surface casing shall be set and cemented so as to protect any and all water bearing formations above such depth.
(Ord. 907. Passed 9-26-77.)