BHP = (1.7)(BPD)(PSI)/[(100,000)(Eff)]		Where:	BHP = Required Brake Horsepower
			BPD = Flow in barrels per day
			PSI = Differential pressure in psi
			Eff = System efficiency (drive and pump)
BHP = (4.083)(BPH)(PSI)/[(10,000)(Eff)]		Where:	BHP = Required Brake Horsepower
			BPD = Flow in barrels per hour
			PSI = Differential pressure in psi
			Eff = System efficiency (drive and pump)
BHP = (G)(H)(S)/[(3957)(Eff)]		Where:	BHP = Required Brake Horsepower
			G = Flow in gallons per minute
			H = Head in feet
			S = Specific Gravity
			Eff = System efficiency (drive and pump)