Innovative Milling Technology Enhances PA Performance to Save 11 RigDays

摘要

With the increase in Plug and Abandonment activities worldwide,Oil and Gas Exploration and ProductionCompanies are always looking for ways to reduce rig time and overall costs involved in such activities.Oneof the plug and abandonment objectives is to seal the well and isolate permanently.This requires millinga window inside the casing to set a cement plug to seal the reservoir and prevent hydrocarbon leakage tosurface or hydrocarbon movement between different formations,as well as preventing contaminations ofaquifers.In most of the wells,where the cement plug is to be set there are two overlapping casing strings.Instandard Plug and Abandonment applications,this will need pilot milling of the inner casing string fromsurface (couple of 100s to 1000s meters) to the required depth and then section milling a window in theouter casing string,then opening the formation to set a cement plug and seal the reservoir.Responding to such application,the plug and abandonment research and development team fromthe service company carried out several studies and conducted multiple simulations to optimize millingperformance,which resulted in a new mill cutting structure design called WavEdge technology.New cutting structure is enhancing the performance of milling by achieving increase in ROP,Durabilityand getting better swarf quality for easy handling.