Liner running techniques for extended reach wells in Liuhua 11-1 field

To run a ?177.8 mm OD liner to the target depth in Liuhua 11-1-24C3ST02 extended reach well, five main technical measures were taken, which were drilling the ?215.9 mm open hole with reaming while drilling technique; drilling the ?215.9 mm open hole with rotary steerable drilling technique; first applying floatation technique in running the liner string in South China Sea; first taking SWIVELMASTERTM to run the liner in China; utilizing 32 joints of ?139.7 mm OD high weight drill pipe in upper section to increase available slack off weight. By the measures above, the ?177.8 mm OD liner was successfully put in the target depth, and valued experience was obtained, which would make the operator more confident in future to treat more difficult extended reach wells in Liuhua field.