Inflation Casing Technology In The Application Of Casing-damage Wells

With the deepening of the oilfield development, because of the effect of factors such as the frequent measures works and well body structure, the cementing quality, tube material and rot ,the speed of the casing damage oil wells up obvious trend. Repairing casing wells is the important work for development of oil field. The difficulty of the casing wells repair is mainly to repair the fault fracture, and the deformation of wells.Adopting the expansion tubing subsidies technology can solve this problem. The expandable tubing technology is a new casing technologies of drilling technology,the technology uses the plastic deformation characteristics of metal ,the casing string in underground will be radial expansion to plastic deformation area,Thus reach the purpose of sealing casing wells section, restoring the normal production of oil wells.This paper, through studying the principle of expansion tubing subsidies technology and the advantage of expandable casing technology characteristic and expansion tools structure, combining Tuha oil field construction site, by opening the tunnel,enlarging eyes and taking into the expansion pipe, tube expanding such mechanical method makes tube permanent plastic deformation, That effectively resolving the problems of the field , while reducing work over time and reducing the production cost.