A Study on Contact Stress of Packer Slip
封隔器卡瓦接触应力研究

The slips in the packer is for supporting packer and for locking rubber after anchoring.The capability of the slips influences directly on oil well yield and productive safety.Distribution of occlusive force between slip and sleeve is a key for success of packer in engineering application.The rational distribution of occlusive force is related to the damage level of sleeve and lifespan of slip.In this article,the finite-element method and 3-D photoelastic technique were both performed to analyze the contact stress of the packer slip.The formation of the experimental model,experimental procedure,the formation of calculation model and the consideration of boundary conditions were presented.The numerical results were compared with the experiment data of 3-D photoelastic model and the induced error is analyzed.The results of experimental stress analysis offer important assurance for construction of finite element model and confirmation of boundary conditions.Some important results are gained from present study and some correlative parameters are provided for optimum design of the packer slip.