The WellConstruction boreholeDiameter must be large enough to accommodate the casingDiameter plus the filter pack thickness plus the annular seal material on each side. State well construction standards typically require a minimum annular space — for example, two inches between casing and borehole wall — to ensure an adequate bentonite or grout seal can be placed. Regulators and well drillers reference boreholeDiameter alongside casingDiameter and filterPackType when reviewing well completion reports.
Technical section
Data model, API, and internals — visible to developers.