R 324.415 Elevations; well depth measurements.

Rule 415. (1) Drilling reference elevations of the kelly bushing or rig floor and a described point on the production casing shall be measured, recorded, and filed pursuant to R 324.418. (2) The depth of the top of key geologic strata shall be accurately determined and shall be entered in the drilling log book and become a part of the record and log of the well. Additional requirements for directional drilled wells are contained in R 324.421.