One of the major impacts on progressing cavity (PC) pump performance is sand handling. PC pumps can handle increased amounts of sand; but under certain conditions, this can have detrimental consequences on pump life, decreasing pump performance and increasing intervention rates. What is the maximum sand cut a PC pump can handle? It is a very common question, but it will depend on different factors such as flow rate, fluid velocity, viscosity, water cut, grain size, grain density, well completion and PC system design. Most of these variables are reservoir characteristics, so they cannot be changed; but selecting a suitable PC geometry design can greatly contribute to PC Pump performance. The effect of the PC geometry design-increasing cross section area, shorter pitch length, and aggressive helix angle while assuring the right fit and elastomer-can definitely improve PC performance for sand handling. The study was completed in La Hocha field. This is an unconsolidated sandstone formation with flow rates between 100 and 300 bbls/d per well of 16° API oil. The "Fat Boy project" is the first in Colombia. It consists of improving PC pump performance operating with high sand cut and challenging conditions to result in fewer interventions, well services, production delays, and associated costs. The project started in mid-2012. Because of successful results, it has been expanded and now includes 85 percent of the wells in the La Hocha field. This is all part of a combined effort looking for reliable and cost-effective solutions for challenging applications. This document will show the methodology applied by Hocol and Weatherford to deal with the high frequency of interventions because of pump failures and sanded-in wells. This document shows the statistics and consistent results from the past 2 years and validates the rationale for using aggressive-geometry PCPs. Adjusting the proper pump geometry has been the main contributing factor improving PCP performance during the past 3 years.