It shall be the duty of the applicant to seal gas and oil wells to protect fresh water wells from salt water pollution. To that end the applicant shall notify the State Division of Mines of his intention to plug or abandon a well and the mudding and plugging shall be done under the supervision of a representative of the State Division of Mines, in one of the following methods:
(a) The Casing Method consists of setting a string of casing between the potable water (Injun) and the sale water (Berea). This string of casing is to remain in place during the life of the well, unless another approved method of separation is used.
(b) The Casing Packer Method consists of setting a string of casing through the sale water (Berea) with a packer between the potable water (Injun) and the sale water (Berea). Prepared mud should be added on top of the packer after completion. This string of casing is to remain in place during the life of the well, unless some other approved method of separation is used.
(c) The Casing Bentonite-Clay Method consists of setting a string of casing through the sale water (Berea) and filling outside the casing with bentonite-clay by circulating under pressure, before further drilling is done. This string of casing is to remain in place during the life of the well, unless some other approved method of separation is used.
(d) If a well is found productive, the ten-inch casing set through the Big Injun sand is withdrawn and replaced by an eight-inch string of casing with a ten-inch Swage attached to the bottom. The annular space between the eight-inch casing and the wall of the hole on top of ten-inch Swage shall be filled with ground prepared Fire Clay to the surface.
(e) A bridge shall be set above the top water in the Big Lime and sufficient fill made to support the setting of a lead plug between the top water in the Big Lime and the top of the Big Lime. The hole immediately above such lead plug shall be filled to 200 feet with prepared clay, rock sediment or cement.
(f) The hole shall be filled from the top of the plug immediately above the Berea sand to the surface with prepared clay, rock sediment or cement.
(Ord. 64-40. Passed 6-16-64.)