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Abstract: To predict bottom-hole pressure accurately and project the achievable production rate from a gas well with large accuracy, a modelling of solid flow effect on pressure drop in a vertical gas well is proposed. This model incorporates the effect of turbulence, solid transport and Moody friction factor, it is an extension of Adekomaya et al (2011) and Sukkar and Cornell method for determination of pressure drawdown in vertical gas well. The results obtained show that solid transport contributes significantly to pressure drop which other models fail to take cognizance of. The pressure drop is higher when solid accompanies the flowing fluid than when solid is not present. It is concluded that the greater the specific gravity of solid and solid holdup, the higher the pressure drop. [Copyright &y& Elsevier]