①The pipe is light. Compared with steel well pipes, zhuan cast iron well pipes and reinforced concrete well pipes, the dead weight of PVC shaft wall pipes can be reduced by 76%, 85% and 82% respectively.
②The running time is short, which is conducive to well completion. The length of each section of plastic well pipe is generally 6m, which can reduce the number of joints by 1/3 compared with other pipe materials. Moreover, the connection method of plastic well pipe adopts socket and screw riveting method, which can save money compared with other well pipes. About 1/2 of the time. After actual measurement, the construction of a 300m deep well, plastic well pipes can save 39%, 59% and 63% of the running time compared with cast iron well pipes, steel well pipes and reinforced concrete well pipes, respectively. The shortening of the running time will greatly improve the completion rate and quality of the deep well.
③Anti-corrosion, prolong the service life of the motorized well, and completely avoid the secondary pollution of the pipe to the well water.
④ The tubing is cheap, which can reduce the cost of a single well by 22% and 31% respectively compared with steel well pipes and cast iron well pipes.
⑤ Conducive to safe construction. The volumetric mass of the plastic well pipe is about 14, and the volumetric mass of the mud in the borehole before running down the pipe is about 107. According to the well depth of 300m, the total weight of the well pipe in the borehole after deducting the buoyancy is only about 720kg, so the construction depends on plastic The self-weight of the well pipe can make the well pipe fall smoothly, so that the drilling rig equipment and construction personnel are very labor-saving and safe.
