Development and Application of Coiled Tubing Fatigue Analysis Software
Coiled tubing is easy to break once it becomes fatigue after plastic deformation under the action of tensile force and internal pressure,which seriously affects the safety of oil and gas production.Based on the data of coiled tubing fatigue test,a fatigue life prediction model for coiled tubing was established through multidimensional curve fitting,and a coiled tubing fatigue analysis software was developed by using C++and Visual Studio.This software can be used to determine how the parameters such as bending radius and internal pressure affect the fatigue life of coiled tubing,and it supports the uniform management over fatigue analysis events in the lifecycle of coiled tubing.The field test and application results indicate that the software can accurately analyze the fatigue life of coiled tubing and track each tube operation from the factory to ensure accurate fatigue assessment of the coiled tub-ing.When the circulating pressure is high and the operation is repeated at a certain depth,the maximum fatigue of the coiled tubing increases sharply.Such operation should be avoided.The study results provide important guid-ance for site application and safety assessment of coiled tubing.
coiled tubingfatigue lifefatigue testfatigue managementsoftware development
NETL
NSTL
万方数据
