Structure Design And Parameters Optimization Of Power Slip

In the current domestic workover operations process, the Wellhead operations is mainly manual operations, the labor intensity of workers is too large, easily lead to major projects and personal accident. Thus, in China appeared a large number of automated wellhead equipments. Power Slip is an important part of the device.Firstly, This paper introduces the status of Slips, and the development process, summarizes the design features of the power slips.Secondly, establish of the metal under uniaxial loading the stress - strain characteristics and idealized models, and discuss a typical basic metal stress - strain relationship; according to the established model ,reach the general state of stress the initial yield condition,Tresca criterion and Von Mises criterion; Introduced a function of subsequent yield condition, and proposed three kinds of loading method that describing the formation of reinforced materials.Describes the features of probability method mechanical design,two kinds of reliability of the general expression, the stress intensity for the exponential distribution and normal distribution, and the calculation of affected by the unstable alternating stress fatigue strength.Finally, This paper analyzes the main parts of Power Slips, using the finite element analysis and Msc.Adams,including: slips tooth angle, slips tooth height, slips tooth spacing, eating into the pipe's depth; discussed the slip body, slip seat invalidation modality and factors affecting the reliability of slip work; optimize a variety of combination using Orthogonal optimization method.