Production ― Pipe String for the Ultra Short ― Radius Radial System

摘要

The URRS is a new type horizontal well, its curvature radius from vertical to horizontal is only 300mm or shorter. It is especially suitable for senescence wells to increase output and recovery efficiency of reserves. In this paper, the basic information of the URRS is simply introduced, the working condition of the production pipe string, one of the essential composition in the URRS, is briefly described, and the material, welding method, welded joint evaluation method of the production pipe string for URRS are introduced.