Solar Wind Storage LLC - Solving green energy storage problems

Underground hydrogen storage chambers

can be constructed using

Blind Bore Shaft Drilling commonly used in mining

Sequence of photos of mine shaft construction 
Courtesy of Abergeldie Complex Infrastructure (Australia - www.abergeldie.com

Drill site ready for shaft construction
Drill head assembly 
Drilling initiated
Shaft liner installation
Completed shaft with liner
Shafts up to 6.5 m (21 ft) in diameter