... ~346.17 3/8~13 5/8441~735120~50softClays, Soft Shale, Marl, Sands, Salts etc.295.2~174.63 3/4 ... .3~311.17 3/8- 12 1/4490-78480-40mediumHard Shale, Limestone, Medium/Hard Sandstone etc.495.2~174.63 3 ... .3~241.37 3/8-9 1/2539-83360-40hardSandy, Shale, Quartzite, Hard Dolomite, Hard Sandstone etc.695.~-174.63 3 ...