TigerBullets A newly created wood-plastic product to control lost circulation in oil drilling

摘要

Drilling fluids, often referred to as drilling muds in the oil industry, are used in well drilling operations. The drilling fluid - which may be a water-, oil- or synthetic-based formulation -circulates within the well bore, carries cuttings to the surface, lubricates the drilling equipment and acts as a cooling agent. Lost circulation occurs when drilling fluids or muds enter into a porous or fractured formation and are lost to the drilling operation rather than returning to the surface for recycling and reuse. Many drilling hazards such as hole collapse, struck pipe and even blowout have been the result of lost circulation. Lost circulation costs the industry about $1 billion per year in the United States alone. Various lost circulation materialshave been developed to cure the problem.