Section R. 299.2361 - Casing other than surface casingRule 2361.
(1) A person who drills a well or causes a well to be drilled under R 299.2311 or rules that were in effect before the effective date of these rules shall case the well in a manner approved by the supervisor of mineral wells to prevent waste.(2) In addition to the surface casing, the supervisor of mineral wells may require or order a string of casing to be run to seal off any of the following: (a) A potentially productive oil or gas zone, or both.(b) A lost circulation zone.(c) A utilized natural brine or mineral zone.(e) A high-pressure zone.(f) A reservoir undergoing secondary recovery.(g) A disposal or injection zone and the confining layer above the disposal or injection zone.(3) All casing, except for casing set under R 299.2364, shall be of sufficient weight, grade, and condition to have a designed minimum internal yield of 1.2 times the greatest expected well bore pressure to be encountered.(4) For the purpose of proper sealing of wells and the prevention of waste, the minimum hole size for a given casing shall be as shown in Table 2361:TABLE 2361
MINIMUM HOLE SIZE CASING SIZE MINIMUM HOLE
SIZE OUTSIDE DIAMETER (O.D.) OUTSIDE INCHES DIAMETER - INCHES
UP TO 7 O.D. CASING O.D. + 1 1/2 MORE THAN 7 O.D. CASING O.D. + 2 MORE THAN 11 3/4 O.D. CASING O.D. + 3
An exception to the minimum hole size as shown in Table 2361 may be granted by the supervisor of mineral wells or authorized representative of the supervisor of mineral wells, upon a written request by the permittee or applicant, if it is determined that the proposal provides proper sealing of the well. The supervisor of mineral wells or authorized representative of the supervisor of mineral wells may require a larger hole size for the surface hole than the size shown in Table 2361 in order to prevent waste.
Mich. Admin. Code R. 299.2361