TWD150 Towable Trailer Hydraulic Water Well Drilling Rig The TWD150 is a compact towable trailer hydraulic water well drilling rig designed for shallow and medium depth borehole drilling. It can be towed by vehicles such as SUVs or pickup trucks, making transportation between job sites much easier. With 150 m drilling depth and 90 to 254 mm drilling diameter, it is suitable for rural water wells, irrigation wells, domestic water supply, and small scale drilling projects.