Double-walled casings can be used universally, as they are designed especially for transmitting high rotational and vertical forces as created by the rotary drives and oscillators. The use of double-walled casings ensures a flush drill string.
Single-walled casings can be used for applications where weight reduction is important.
Single wall and double wall casings for foundation piling are also manufactured by UNICORN DRILL for different drilling conditions, UNICORN DRILL also manufactures other accessories used when drilling with casing e.g., Casing drive adapter, casing joints and casing shoes/blocks, etc.