Floating and top drive casing running for CP3-D18-XX in Dagang Zhaodong Oilfield
CP3-D18-XX,a horizontal production well in Dagang Zhaodong Oilfield,has a total depth of 3 064 m and a horizontal displacement of 2 288 m,with the setting depth ofϕ244.5 mm casing reaching 2 998.69 m.Due to the long open hole with a diameter of 311.1 mm,complex borehole trajectory,and the difficulty in hole cleaning,the casing running process encountered high friction resistance and insufficient suspended load,failing to succeed using the conventional method.The technologies of floating and top drive casing running were combined for ϕ244.5 mm casing running.The on-site application and evaluation show that this comprehensive technology is recommended when conventional casing running methods cannot meet the operation requirements.It can not only overcome problems such as high resistance and insufficient hook load of casing running but also quickly rotate retrievable casings to reduce the risk of casing sticking,ensuring the safety of on-site operation.
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