Well drilling construction "Donut Drill Method" (Old Well Restoration)

Many achievements! A groundbreaking method that completely revitalizes the structure of old wells as if they were brand new. It allows for the use of existing land and facilities, contributing to cost reduction!

Using a donut drill machine developed independently, we excavate the outer circumference of old wells in a donut shape down to the bottom of the well, extracting all structural components from the screen and casing pipes to the filling gravel, thereby regenerating the well structure. Our method, utilizing the latest technology in materials and finishing techniques, offers excellent water lifting efficiency and provides high-quality wells that do not produce sand. 【Benefits】 1. Unlike conventional double casing construction or renovation work, we fundamentally resolve various troubles. 2. The well is reborn as a high-quality well that does not produce sand. * We conduct sand discharge measurement, with a delivery condition of 5 mg/L or less, but the actual sand discharge is below 1 mg/L. 3. There is no need to acquire new land. 4. Existing water supply pipes and electrical equipment can be reused, reducing overall construction costs. The "Donut Drill Method" is widely adopted in public facilities and private factories across the country.

Renovation and repair methodsSpecial Construction Method