Cluster wells drilling technology and its application in Sulige gas field

The cluster wells drilling technology is to meet the requirement of developing and constructing a“scientific, harmonious, and enviromental friendly”Sulige gas field. During the construction of directional cluster wells in the area, there exist some difficulties, such as the strong abrasive formation, the difficult trajectory control, low speed and high speed of drilling. So research and field test are launched from the perspectives of the optimization of casing profile, the optimization and improvement of drill bits, the trajectory control, and the application of drilling speed system. Judging from the applicatioin results of the Su 14-20-13 well, drilling speed is enhanced remarkably, and systematic technologies for fast drilling are developed. In additioin, new thoughts and methods are probed into for the speed-up of clusters wells drilling in Sulige gas field, making the direction of further steady speed-up more clearly.