What is casing shoe integrity test?

A casing shoe integrity test is a procedure used in the oil and gas industry to evaluate the strength and sealing capability of the casing shoe, which is the bottom part of a casing string that is designed to prevent fluid flow. This test typically involves pressurizing the casing or the annulus to check for leaks or weaknesses in the cement bond or the casing itself. By ensuring the integrity of the casing shoe, operators can help prevent wellbore collapse and fluid migration, thereby enhancing safety and operational efficiency.