Abstract: Deep water area is becoming increasingly the focus of offshore oil & gas exploration and development. Because of the special sedimentary environment, the deep water drilling faces many challenges, such as unstable seabed, low formation fracture pressure, low temperature at seabed and so on. Jetting technology can solve the challenge faced in deep water top hole. Jetting technology can avoid fracturing the formation because of the high mud density and avoid impacting the cementing quality due to the low formation temperature. This paper presents how to design the depth and string structure through conductor force analysis, and how to optimize jetting parameters and technical measures taken to ensure conductor jetted in place. It provides a good reference for deep water drilling.