Improved Solution to Design Model of Soft Landing in Borehole Trajectory

• 责任者：Zhao Mingjun (Liaohe Branch of Engineering & Technology Research Institute ; Great Wall Drilling Corporation ; PetroChina ; Panjin 124010 ; China)
• 刊名：Exploration Engineering
• 出版年：2010
• 卷期：37(5)
• 关键词：井眼轨迹 ; hole trajectory
• 页码：p.10-13
• 图表：1 illus., 8 refs.
• 分类号：2000
• issnNo：ISSN1672-7428
• isbnNo：CN11-5063/TD

The solution for design model of soft landing in borehole trajectory can come down to the solution with 7-element nonlinear equations. 7-element nonlinear equations are simplified to be one-variable polynomial equation by element elimination and simplification; and based on which, a new algorithm for design model of soft landing was developed. Theoretical analysis and practical calculation examples show that the new algorithm is mainly for the calculation of nonnegative real roots of polynomial equation, and calculation of functional relationship between other unknown number and real root is very less.