The invention relates to
a site-limited long-distance large-aperture horizontal
directional drilling pipeline back-dragging construction process, and relates to the technical field of pipeline installation. The site-limited long-distance large-aperture horizontal
directional drilling pipeline back-dragging construction process comprises the following steps that S1, hole cleaning treatment is carried out; S2, back-dragging operation is tested; S3, back-dragging operation preparation is carried out, specifically, the following preparation work is carried out, specifically, (1) back-dragging pipes are arranged and paired, (2) anti-
corrosion layers and protective
layers of the back-dragging pipes are constructed, (3) the balance weight of the back-dragging pipes is increased so as to reduce the back-dragging force, (4) the back-dragging pipes are hoisted, (5) a
drill rod and a
drill bit are selected and checked, and (6)
slurry is prepared and water is stored; S4, the first section of back-dragging
pipe is dragged back; S5, the second section of back-dragging
pipe is dragged back; S6, the step S5 is repeated until the last section of back-dragging
pipe is dragged back into a pipe hole; and S7, the quality of the back-dragging pipes is inspected after the back-dragging is completed. According to the site-limited long-distance large-aperture horizontal
directional drilling pipeline back-dragging construction process, the construction difficulty of the back-dragging pipes in the back-dragging construction process can be reduced conveniently.