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target="_blank">xaL</a>在钻井中是传递动力的主要工具Q在摩擦撞下,易出现钻pUҎ核、扩展、刺漏以致穿孔和断裂。钻杆的材料一般ؓ抗硫材料、铝合金材料、钛合金材料、超高强度钢及新型碳U维复合材料、凯夫拉材料{,q些材料才抗腐蚀、刚损、抗疲劳{方面各有所不同Q下面让我们看看<b>xaL</b>出现的应力失效断裂进行分析:<br /> <strong>1.L失效分析的作?nbsp;</strong><br /> <p> 失效分析是判断钻杆失效Ş式、分析失效原因、研I失效处理方法,从而达到改善钻q设计原理和完善加工工艺Q减和预防L因同一原因引v的重复失效断裂的不良现象Q降低石沚w采的l济成本。钻杆是xaM讑֤中必不可的工具Q一般都在恶劣的环境下应用,是,应用频率高,旉长,影响使用寿命的因素多Q是xa钻采中更薄弱的环节?</p> <p style="text-align:center;"> <img src="/uploads/image/20181019/20181019093043_6664.jpg" alt="" /> </p> <strong>2.造成失效的宏观和微观因素 </strong><br /> <strong>1)宏观因素 </strong><br /> L承受的内压力、受腐蚀造成的内表面产生的敏感缺P如裂UV脱落、刺孔等{。从断口形貌的断裂方向看Q切向蝲荷生扭矩对裂纹的u向扩展破坏;旋{作用弯矩使裂U生u向扩展;合力产生的应力超q抗拉强度极限,造成q蝲断裂。从观察表明裂纹的v始和扩展方向看与表面~陷有关Q钻杆疲x心在子的表面。但是,宏观特征q不能说明引h裂的裂纹形成原因Q钻杆自w用材料的~陷和环境因素都有可能Ş成内表面~陷Q如涂层自n~陷可以D内表面局部腐蚀QŞ成裂UҎQ外载荷可以D涂层破裂Q引起内表面局部腐蚀Q?材料内部~陷可以形成应力集中。可以看出钻杆的断裂l与材料中的孔洞、缺口、裂U和应力集中有密切的联系Q是造成l构破损的更重要的原因。这些早期出现的裂纹和应力集中大都在锥Ş体与柱之间q渡区域的圆周上Q伴随着疲劳断裂始终。所以宏观因素就是疲x裂和刺孔IK?nbsp;<br /> <strong>2)微观因素 </strong><br /> 对引起钻杆宏观因素进行进一步研IӞ扑և破坏机理是微观影响因素。用光学和电子显微镜Ҏ裂和刺孔的上qC|进行观察ƈ对化学成分和力学性能q行分析Q获取热处理和热加工寚w杆的影响Q管Dc过渡段、加_段、断口的金相l织变化QB内表面裂纹金相l织变化。对刺孔q行电子昑־镜能谱分析、断口电子显微镜观察 <br /> lg所qͼ疲劳断裂是断裂的主要原因Q穿透性是刺孔的主要危宛_特征。在xaL的用过E中Q我们要Ҏ影响的因素和M的地质构造情况对L做好相应的处理和保护措施Q提高钻杆的使用寿命?nbsp;<br /></h3> <p><a href="http://www.couivm.tw">xaL</a><font color="red">,</font><a href="http://www.couivm.tw">q口L</a><font color="red">,</font><a href="http://www.couivm.tw">地质L生厂家</a>-<a href="http://www.couivm.tw">Ȯ阳中泰xad</a></p> <div class="newArtiNext"><div>上一?<a href="259.html">地质L断裂的原因有哪些Q?/a></div> <div>下一?<a href="257.html">【图文?14xaL生厂家_140xaL怎么l护保养</a></div> </div> </div> <div class="tag">相关标签Q?a href='/key.aspx?k=%ca%af%d3%cd%d7%ea%b8%cb'>xaL</a>,<a href='/key.aspx?k=%ca%af%d3%cd%d7%ea%b8%cb'>xaL</a>,</div> <div class="relate"> <div class="inProTit"> <span class="fl"><b>相关新闻</b></span> </div> <div class="inNewsCon"> <ul class="insProList"> <li><a href="/news/315.html" target="">如何提高地质L生厂家的效?/a><span>2019-08-03</span></li> <li><a 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href="/supply/7.html" title="新石沚w?>新石沚w?/a></h3> </li> <li> <h2><a href="/supply/68.html" title="89反扣L"><img src="http://cmsimgshow.zhuchao.cc/23774/201903211138272362377463463.jpg?path=www.couivm.tw/uploads/cp/201903211138272362377463463.jpg" onload="imgZoomer(this,219,146)" width="219" height="146" alt="89反扣L"></a></h2> <h3><a href="/supply/68.html" title="89反扣L">89反扣L</a></h3> </li> </ul> <h6 class="clearfix"></h6> </div> </div> </div> <h6 class="clearfix"></h6> </div> <h6 class="clearfix"></h6> </div> <div class="ifooter"> <div class="wfixed"> <div class="ft_nav tac"> <a href="/" rel="nofollow">首页</a>| <a href="/news/zgjs/">L技?/a>| <a href="/news/zggg/">L规格</a>| <a href="/supply/">产品中心</a>| <a href="/news/">新闻资讯</a>| <a href="/contact/" rel="nofollow">联系我们</a>| <a href="/4g/" title="手机|站">手机|站</a> <script type="text/javascript" src="http://home.nestcms.com/cmode/"></script> <script type="text/javascript" src="http://home.nestcms.com/year/2015-09-26/"></script> <a 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