The supervision certificate of PetroChina is not easy to test. Because its application requirements are very strict, it is difficult to achieve. Requirements are/kloc-more than 0/5 years working experience in drilling engineering operation or in charge of commanding drilling operation, rich field experience, control training certificate, health certificate, academic certificate, etc. At present, there are two places in China that can receive training, namely CNOOC Supervision Center and Sinopec Dongying Training Center. Only by passing the training and examination can you obtain the certificate of drilling supervision.