期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2017
卷号：4
期号：5
页码：17-22
DOI：10.15587/1729-4061.2017.108822
语种：English
出版社：PC Technology Center
摘要：One of the effective methods of cleaning wells from ferromagnetic objects is the use of magnetic fishing tools. However, the known designs have a number of drawbacks. Therefore, new designs of high-efficiency fishing tools were proposed in the work. For development of these tools, magnetic systems consisting of cylindrical magnetic cores with segmented radially magnetized permanent magnets made of rare-earth materials between them were used. According to the results of theoretical research performed using the finite element method, rational parameters of the elements of the magnetic systems, namely, the length of the permanent magnets and the height of the magnetic system were established. This has made it possible to develop systems that are characterized by a maximum utilization of the power of permanent magnets. The paper presents results of experimental research into the hoisting capacity which confirm advantage of the developed fishing tools over the known counterparts. The use of new magnetic tools will increase efficiency of cleaning wells from ferromagnetic objects of varied shapes and weight during cutting “windows” in the casing and in the process of drilling branch holes.
关键词：fishing tool;magnetic system;permanent magnet;hoisting capacity;tractive characteristic;magnetic flux density
