The process of sidetracking an existing borehole with a balanced cement plug has historically been time consuming and problematic for the drilling industry. In many instances long drilling times or even multiple plugs are required to achieve the objective of sidetracking the well. These problems lead to increased drilling time and increased cost for the operator. Traditional cement slurry systems for sidetrack applications have been focused on the development of high compressive strength through reduced water content. Conventional high compressive strength cement systems exhibit low resistance to impact and low resistance to fracture propagation through the set cement. Recent developments in oil well cement system have incorporated a unique micro-ribbon technology with an optimized particle size distribution to increase the durability, load bearing capacity and resistance to fracture propagation of set cement. Field tests with these cement systems have shown substantial improvements over conventional cement slurries in terms of plug success rate and time required to achieve the objective of sidetracking the well. These improvements have resulted in significant reductions in the total cost of the operation of sidetracking wells. This paper will discuss the improved mechanical properties of these new cement systems and the success of the numerous field tests

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