In this topic, we will apply the effective mud density formula to determine maximum ROP before fracturing formation.

**Figure 1** – Max ROP before Fracturing Formation

These two equations that will be used to determine the maximum ROP are listed below;

Effective mud density due to cuttings in the hole can be determined by the empirical equation below;

**Where;**

ρ_{eff }is effective mud density in ppg.

ρ_{m }is mud density in ppg.

Q is flow rate in gpm.

ROP is rate of penetration in fph.

d_{b }is wellbore diameter or bit diameter in inch.