Multi-target Directional Well Casing Into The Lower Capacity Determination And Optimization Under The Condition

Under the multi-target directional well casing string into the process, in the column structure and weight factors, borehole curvature and inclination, hole enlargement ratio, stiffness, elasticity, etc. centralizer, string string bound to deform, resulting in the middle of the casing wells vary in different depths, while causing the casing to increase frictional resistance, resulting in hard down into the bottom of the casing string. To this end, we will conduct research on the issue by establishing and theoretical analysis column string mechanics model.For the next casing string into the difficult problem, a multi-target directional well casing string state overall force structure mechanics analysis model, using multi-target directional well casing string stress analysis theory and methods, directional well casing string Finite element analysis of the process, the status of the multi-target directional well casing string dynamics judgment obtained under the conditions of the casing string optimization theory and methods, the ability to make a casing according to this method is determined, the next Optimization methods and results of the evaluation of programming.In this paper, multi-target directional well casing string into the conditions under dynamic study and make the casing string according to the state under the conditions of optimization theory. With the ability to determine casing compiled under the conditions of optimization methods and software to evaluate the effect of La 2- oblique PS2916 site wells, wells La 2- oblique PS2728, PS2828 Wells and La La 2- 3- oblique slant wells PS2805 mechanical calculations to obtain the elastic four wells before and after optimization, rigid centralizer position, the number of casing strings and the cumulative total frictional resistance, to ensure that the four to five paragraphs to develop well under normal conditions Casing.