(a) (1)All casing, including surface protection and production strings, shall be either seamless steel or equivalent quality oil-well casing. Each production string of casing must comply with at least the following minimum internal pressure yield strength, computed in accordance with the A.P.I. standards:
Depth of String in FeetInternal Pressure Rating (psi)
7" Casing
0' - 3,400'2,720 lbs.
3,400' - 4,400'3,740 lbs.
4,400' - 5,850'4,360 lbs.
5,850' - 7,650'6,340 lbs.
7,650' - 9,450'7,240 lbs.
9,450' - 11,300'8,160 lbs.
5-½" Casing
0' - 4,400'3,110 lbs.
4,400' - 5,600'4,270 lbs.
5,600' - 6,900'4,810 lbs.
6,900' - 8,000'5,320 lbs.
8,000' - 10,005'7,740 lbs.
(2) Each joint and length of each particular casing string shall have prior to setting unconditionally passed a complete cold-water test.
(b) No well shall be drilled within the city limits without properly setting surface casing to a minimum depth on one thousand (1,000) feet. No well shall be drilled within the city limits without cementing the surface casing by the pump-and-plug method with sufficient cement to completely fill all of the annular space behind such casing to the surface of the ground, and without cementing the production string by the pump-and-plug method with sufficient cement to completely fill all the annular space behind the production string to at least 600 feet above the highest oil and/or gas bearing horizon. In the event a protection string of casing is required under the terms of this chapter, without cementing the protection string by the pump-and-plug method with sufficient cement to completely fill all the annular space behind the protection string to at least 600 feet above the highest oil and/or gas bearing horizon.
(Ord. 39817, passed 10-2-79) Penalty, see § 170.99