Optimization Under Ream Applications to Save Rig Time in Gulf of Mexico Shallow Wells

The current conditions of the oil market have lead the industry to implement comprehensive solutions in order to reduce operating times and costs. The constant search for areas of improvement for systems, operative practices and procedures, as well as the timely identification of problems and technical solutions, are the key to achieve the reduction in the final cost of the drilling projects. This document describes the events and results obtained during the execution of a complex under ream application in 17.5” x 20” section on a Shallow Water well, located in South West Gulf of Mexico. Any under ream application involve issues of their own; the presence of a second cutting structure in the BHA increases the levels of torque experienced, as well as drilling vibrations, which can be the cause of electronics failures in directional assemblies, fatigue in connection and general reduction in the life spam of the drill string