固井套管扶正器应用技术研究

发布时间：2018-01-08 08:21

本文关键词：固井套管扶正器应用技术研究　出处：《重庆科技学院》2017年硕士论文　论文类型：学位论文

【摘要】：在定向井固井施工过程中,套管居中度是影响固井质量的重要因素之一。为提高套管居中度,现场采用套管扶正器。不同类型的套管扶正器由于结构和特性不同以及套管扶正器安装距离的不同,套管柱下入过程中的摩阻力也存在较大差异。因此,对于定向井、特别是大位移井,确定合适的套管扶正器及安装距离,对于套管柱的顺利下入及提高固井质量具有重要的意义。本文在调研国内外文献的基础上,对现场常用的套管扶正器的结构和特点进行了调研分析,认为刚性套管扶正器使用范围有限,液压式套管扶正器结构复杂、可控性差,而弹性套管扶正器结构简单、现场应用较多,在随套管下入过程中弹性套管扶正器下入摩阻力还可进一步降低,以使套管柱可下深度进一步加大。本研究在对现有弹性套管扶正器结构进行分析的基础上,对弹性套管扶正器结构进行了改进设计,采用摩擦系数较低的硬塑料材料作为与井壁接触的支撑块,其摩擦系数约是原弹性套管扶正器的弹簧片摩擦系数的十分之一,运用二维画图工具设计出硬塑料扶正块零件图以及改进后的弹性套管扶正器的装备图,改进结构设计申请获国家实用新型专利(专利号:ZL201621089458.X)。考虑套管内外密度差影响因素分析计算载荷,参照石油与天然气行业标准方法SY/T5334-1996,修正了套管扶正器安装间距计算方法,使分析计算弹性套管扶正器安放间距更适合用于工程实际。在此基础上,运用VB语言编写的计算程序,可实现套管扶正器下入摩阻力、安装间距等参数的快速计算,对于套管柱的优化和下入作业,具有一定的指导意义。根据计算程序,结合工程实际井草平6井和南华1井,计算出原弹性套管扶正器和改进后的弹性套管扶正器下入过程的摩阻力,计算结果进行对比分析表明:改进的弹性套管扶正器摩阻力降低了原来的百分之九十左右,更有利于定向井、大位移井下套管作业的顺利实施。
[Abstract]:In the directional well cementing process, casing center degree is one of the important factors affecting the cementing quality. In order to improve the casing center degree, the centralizer. Different types of casing centralizer due to the structure and characteristics of different and different casing centralizer installation distance, casing down into the friction in the process of existence big difference. Therefore, for directional well, especially the large displacement wells, determine the centralizer and the appropriate installation distance, is of great significance for the improvement of casing and well cementing quality. Based on the investigation of domestic and foreign literature on the structure and characteristics of the centralizer of the site research and analysis that rigid casing centralizer with limited scope, structure of hydraulic casing centralizer is complex, poor controllability, and elastic centralizer has the advantages of simple structure, widely used in the scene, with the casing In the process of elastic centralizer in friction can be further reduced, so that the casing can further increase the depth. This research is based on the existing elastic centralizer structure on the analysis of elastic centralizer structure was designed by using hard plastic materials as low friction coefficient the supporting block and wall contact, the friction coefficient is about spring friction coefficient of elastic casing centralizer 1/10, using two-dimensional drawing tools to design the equipment figure elastic centralizer hard plastic centralizer piece part drawings and improved the improvement of structure design for the national utility model patent (Patent No.: ZL201621089458.X) considering the internal and external casing. The density difference analysis on the influencing factors of the load calculation, according to the SY/T5334-1996 oil and gas industry standard method, fixed centralizer spacing meter installation The analysis calculation method, calculation of elastic casing centralizer spacing is more suitable for engineering practice. On this basis, using the calculation program of VB language, can achieve the centralizer in friction resistance, fast calculation of installation distance and other parameters for optimization of casing and operation, which has a certain guiding significance. According to the calculation procedure, combined with the engineering practice well Cao Ping 6 well and South China 1 wells, friction elastic centralizer calculated elastic centralizer and improved in the process, by comparing the calculation results analysis show that: the improved elastic centralizer friction reduces about ninety percent of the original, more conducive to well, the smooth implementation of large displacement casing operations.

【学位授予单位】：重庆科技学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE925.2

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