Screw pumps (twin and three screw pumps) are uniquely and largely playing a key role in the upstream and midstream environment of the oil and gas industry by offering long-term benefits to their users. Crude oil is highly viscous in nature and often requires diluents, steam, or other stimulation to flow the oil from the reservoirs to the pipelines. Vertical screw pumps are highly suitable for pumping these types of nontraditional grades of crude oil.