Stress state analysis to casing-cement sheathformation system (CCSFS) is the foundation of the wellbore integrity design and examination. Many elastic mechanic models have been established to calculate the stresses and displacements of CCFS, but all analytical models and most finite element models took no account of the initial loaded state, and ignored the initial stresses and displacements on...

The casing damage of oil and water wells has seriously affected the normal production oilfield. This paper analyzes high occurrence in Saertu layer, finds that there is a contradiction between injection formation prevention control damage. Although wellhead pressure can be guaranteed to lower than its fracture during production, injected energy at includes potential kinetic energy. Because rela...

In recent years, the number of new wells has been increasing continuously, which a large impact on production. During drilling pass, formation pressure dropped greatly, casing loss rate is high, and water cut increased, affects overall development situation Zone A. this paper, by studying rule index change in process off periodic injection, technology combining injection formed, application A c...

Construction of geothermal wells that are effectively cemented and durable poses a significant operational challenge. Typically, lost circulation while drilling and cementing can make it seemingly impossible to place a complete column of cement behind casing strings. Incomplete cementation can lead to well failure caused by cyclic temperature loading on the casing that occurs throughout the lif...

The paper analyzes field data of the most effective geophysical methods to date monitor technical condition production casing using examples wells at Romashkinskoye oil in Tatarstan. results interpretation according a flaw detector together with caliper gauge are presented. significant intervals column subjected various stages corrosion have been identified and described, which allows us determ...

The main objective of this research work is to find the natural frequency and mode shape of truck transmission housing. Truck transmission housing or gearbox transmission casing is subjected to vibration induced by the excitation forces transmitted to the casing through bearings. So it is required to find the natural frequency for the accurate prediction of housing life and prevent it from frac...