Rig Finite Element Analysis Of The Derrick And Bearing Capacity Assessment Study

Lifting drilling rig derrick is an important part of the equipment, its bars and more complicated stress,frequent use in the oilfield operations,the finite element analysis is derrick important part of the design and application.This thesis focuses on a wide Western Oilfield JJ225/43-K mast for mechanical analysis,and based on the carrying capacity of the derrick for safety assessment,this structural design for the derrick and oil field production has important significance.In this paper,inite element analysis derrick research status,through the establishment of JJ225/43-K mast of the finite element analysis model,using ANSYS analysis software,for three typical operating conditions of stress and deformation analysis of derrick,to find out derrick in the condition of maximum stress and deformation,has been static analysis of the derrick in the weak link.Then apply the dynamic analysis of the way,Block Lanzcos method using modal analysis derrick,won the first 10 natural frequencies and vibration pattern map, and based on transient analysis and calculation of dynamic response obtained derrick in the dynamic loading of the deformation and stress,and the derrick at the top,two-story platform and Renzi Jia and other major sites at different times in response to changes in laws and vibration.The above calculation is mainly to find the weak links derrick and stress variation,the final study is to analyze the bearing capacity of derricks,derrick to do this under the previous simulation model,applying different loads on the model,get the maximum stress position derrick,the maximum stress and load is linear relationship between the inferred based on this ultimate bearing capacity of the derrick,and field test to compare the stress-strain data,the feasibility study of theory.And according to the strength and stability theory-based evaluation theory,the simulation analysis and experimental tests two perspectives to assess the carrying capacity of derricks in order to achieve the right JJ225/43-K mast carrying capacity assessment and analysis of the study, has important theoretical and practical value.