Abstract: At present, wireline logging cannot be used for extended-reach directional wells, horizontal wells, and wells with complex well conditions, while other methods such as drilling instrument transportation logging and storage logging have the problems of long operation time and high risks, which affect the efficient exploration and development of oil and gas fields. This article compares the characteristics of existing logging technologies, introduces the performance of over bit logging instruments, construction steps, and improvements in the matching drill bit technology. It demonstrates the application of over bit logging technology in the actual construction of X oilfield and evaluates the construction effect. The on-site application results show that over bit logging has shortened the logging operation time of complex wells, ensured safe operation, obtained qualified logging data, and achieved good application effects and economic value. This technology can be promoted and applied in offshore oil and gas fields, further reduce the operation period and cost of offshore drilling.