The invention discloses a horizontal well cementation and completion integrated
pipe string device for secondary spudding and belongs to the technical field of
drilling engineering. The horizontal well cementation and completion integrated
pipe string device for secondary spudding comprises a casing
pipe, a pipe string positioned in the casing pipe, ball-actuated sliding sleeves, a differential-pressure sliding sleeve, at least three
open hole packers and a float shoe, wherein the pipe string comprises a vertical section, an inclination section and a horizontal section from top to bottom, and the ball-actuated sliding sleeves, the differential-pressure sliding sleeve, the
open hole packers and the float shoe are arranged on the horizontal section. The horizontal well cementation and completion integrated pipe
string device for secondary spudding is characterized by comprising a float collar and a self-packing ball seat, the ball-actuated sliding sleeve is arranged between each two adjacent
open hole packers, and the pipe string is in screwed connection with the float shoe, the float collar, the self-packing ball seat, the differential-pressure sliding sleeve, the open hole packers and the ball-actuated sliding sleeves sequentially from bottom to top. The horizontal well cementation and completion integrated pipe string device for secondary spudding has the advantages that suspension packers are not required; when the pipe string is down to reach a predetermined well depth, the well is cemented and reservoir reformation is conducted directly after
cement slurry cementation, so that safety is greatly improved; drilling speed can be increased effectively,
well drilling and completion periods are shortened, cost of development is reduced and oil
recovery is improved.