The drilling duration of a residential well using professional expertise varies depending on several factors such as soil type, access, permit requirements, and depth needed. Generally, drilling a well can take anywhere from a few days to several weeks or even months. The drilling process includes the use of a drill rig, motor, well drill bits or drill point, stem, casing, well screen, pump, and drilling additives. The well drilling company will also need to ensure that the well is properly constructed, including adequate casing and sealing to prevent contamination. Professional expertise is necessary to ensure that the well is drilled safely and correctly, and to comply with any local regulations and permit requirements.