Cause Analysis of Casing Leakage in HXA7-7 Directional Well

Casing leakage occurred during the cementing process of HXA7-7 directional well. Causes analysis of casing leakage in the directional well were analyzed by late time test of volume method, and the casing string was checked by logging. The results show that the original defects in the HXA7-7 directional well casing. In the process of cementing, the original defects spread through the wellbore and eventually lead to the leakage of the casing.