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</div> <div class="CSpages_R_title_R"> <span><a href="/">首页</a> > <a href="/news/zgxf/">é’ÀL†ä¿®å¤</a> > 详细内容</span> </div> <div class="clearit"></div> </div> <div class="CSpages_R_cont"> <!--CSpages_R_cont--> <div class="content"> <h3>é’ÀL†ä¿®å¤æ—¶å‘现钻杆管体失效的原因</h3> <h6>来源åQ?a href='http://www.lapucelletactics.com/news/44.html'>http://www.lapucelletactics.com/news/44.html</a>    å‘布旉™—´ : 2016-09-30</h6> <p><a href="http://www.lapucelletactics.com/">é’ÀL†ä¿®å¤</a>åQ?a href="http://www.lapucelletactics.com/">油管清洗</a>åQ?a href="http://www.lapucelletactics.com/">抽æÑa杆清‹z—设å¤?/a>首选ã€?a href="http://www.lapucelletactics.com/">‹È®é˜³åˆ›ç«‹çŸÏxÑa机械</a>ã€?/p> <div class="detail" id="zoom"> <p><span style="font-size:14px;line-height:2;">       é’ÀL†½Ž¡ä½“中部失效的原因在äº?é’ÀL†ç”׃ºŽåœ¨è…èš€ä»‹è´¨ä¸‹é•¿æ—‰™—´å­˜æ”¾è€Œäñ”生蚀å?蚀坑周围存在微裂纹在钻井过½E‹ä¸­,因承受弯曲交变应åŠ?卛_œ¨èš€å‘底部这个应力集中的地方产生初始裂纹,随着服役˜q‡ç¨‹çš„推¿U?微裂¾U¹ä¼šæ…¢æ…¢æ‰©å±•ã€‚由于该部位的正常磨损和偏磨,使壁厚变è–?则ä‹É裂纹扩展加快,òq¶è¿…速达到管体刺½I?甚至断裂,造成失效事故ã€?/span><br 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