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裸眼中测封隔器胶筒骨架材质与力学分析及其改进
引用本文:姜学海,张福祥,嵇国华,窦益华. 裸眼中测封隔器胶筒骨架材质与力学分析及其改进[J]. 石油钻探技术, 2007, 35(4): 19-21
作者姓名:姜学海  张福祥  嵇国华  窦益华
作者单位:1. 中国石油大学(北京)石油与天然气工程学院,北京,昌平,102249
2. 塔里木油田分公司,勘探事业部,新疆,库尔勒,841000
3. 西安石油大学,机械工程学院,陕西,西安,710065
摘    要:针对裸眼中途测试封隔器胶筒骨架落井现象,在对压缩式裸眼测试封隔器胶筒骨架材质分析的基础上,运用有限元方法对胶筒骨架应力和变形进行了分析,并以胶筒骨架强度安全为前提提出了裸眼中测允许测试压差的计算方法。分析结果表明,"细脖子"与扣盘结合处应力最大,最易损坏;球墨铸铁虽有较高的强度和韧性,但脆性较大,在较大冲击载荷下易损坏。为此,提出用强度更高且易磨的优质合金结构钢35CrMo取代球墨铸铁作为胶筒骨架材料,并在胶筒骨架与橡胶接触部位加工了特殊形状的容胶槽,从而提高了胶体与胶筒骨架的结合强度。

关 键 词:封隔器胶筒  胶筒骨架  材质分析  受力分析
文章编号:1001-0890(2007)04-0019-03
修稿时间:2007-05-10

Mechanics Analysis and Improvement of the Material Property of Skeleton Structure of the Packer Rubber during Drill-Stem Testing in Open Holes
Jiang Xuehai,Zhang Fuxiang,Ji Guohua,Dou Yihua. Mechanics Analysis and Improvement of the Material Property of Skeleton Structure of the Packer Rubber during Drill-Stem Testing in Open Holes[J]. Petroleum Drilling Techniques, 2007, 35(4): 19-21
Authors:Jiang Xuehai  Zhang Fuxiang  Ji Guohua  Dou Yihua
Abstract:In order to solve the problem of packer rubber skeleton structure falling during drill-stem testing in open holes,the finite element method was used to analyze stress and deformation of the packer rubber skeleton structure based on the material analysis of the compression packer rubber during drill-stem testing in open holes.The allowed testing pressure difference during drill-stem testing in open hole was proposed considering on the strength safety of the packer rubber.The analysis results indicate that the maximum stress exists in the connection part between the bottle neck and gripping plate,which is also easily damageable.Though nodular cast iron with higher strength and toughness has higher brittleness and is easier to be damaged under larger impact loads.Therefore,an alloy named 35CrMo with higher strength was suggested to substitute nodular cast iron for raw material of rubber skeleton structure. In addition,rubber slot with special shape was also added on the interface between the skeleton structure and packer rubber to improve construction strength between the packer rubber and its skeleton structure.
Keywords:packer rubber  rubber skeleton  material analysis  force analysis
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