API RP 40

API RP 40 is a set of guidelines created by the American Petroleum Institute to help ensure the safe, reliable, and efficient operation of oil well cementing activities. It provides best practices for preparing, placing, and assessing cement in oil wells to prevent issues like leaks or well failures. Essentially, it offers industry-standard procedures and recommendations to maintain well integrity and safety during the cementing process, supporting responsible and consistent operations in the oil and gas industry.