... acid fracturing and hydraulic fracturing of new and existing natural gas and oil wells, which can increase the output and ... extend the service life of oil & gas wells. A study of production rates published by the Society ... 12-20 mesh, 16-20 mesh, 16-30 mesh, 20-40 mesh, 30-50 mesh, 30-60 mesh, 40-60 mesh, 40-70 ... , Henan, ChinaNo.08 hydraulic frac sand for oil and gas 30/50 low density