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</div> <div class="CSpages_R_cont"> <!--CSpages_R_cont--> <div class="content"> <h3>钻杆损坏的原因有哪些ï¼?/h3> <h6>来源ï¼?a href='http://www.eipituco.com/news/137.html'>http://www.eipituco.com/news/137.html</a>    å‘布时间 : 2020-09-05</h6> <p><a href="http://www.eipituco.com/">钻杆修复</a>ï¼?a href="http://www.eipituco.com/">油管清洗</a>ï¼?a href="http://www.eipituco.com/">抽油杆清洗设å¤?/a>首选ã€?a href="http://www.eipituco.com/">濮阳创立石油机械</a>ã€?/p> <div class="detail" id="zoom"> <p>钻杆在钻探全过程中非常容易出現毁坏,有很多缘故,必须大家用心剖析,濮阳市创立石油<a href="http://www.eipituco.com/zgxfsb/" target="_blank">钻杆修复</a>公司给大家整理了相关原因ã€?br /> <br /> 一、震动、弯折损å?br /> 钻杆柱做到临界值转速比时,会时钻杆产生震动,这一震动通常会导致钻杆弯折、过多损坏、快速损害和疲惫毁坏。非常是钻杆产生二种种类震动(波节震动与弹黄摆型震动)重叠时更为不好。临界值转速比随钻探设备的长短、钻探设备规格、钻铤规格和井孔尺寸而转变ã€?br /> <br /> 二、拉申毁å?br /> 拉申毁坏常产生在提拉紧致被卡的钻杆全过程中。成为提抗拉力超出屈服极限时,在钻杆壁的较弱一部分或最少横断面处,会产生“细颈部”形变。假如上提抗拉力超出刚刚的極限抗压强度,则钻杆将被扯断。拉申毁坏一般产生在钻柱的上端。由于上端钻探设备既要承受力,又要承担钻柱的净重ã€?br /> <br /> 三、疲惫毁å?br /> 疲惫毁坏是钻杆毁坏中普遍的,疲惫毁坏有三种基础种类ï¼?br /> 1、纯疲惫毁坏<br /> 钻杆要承担拉申、缩小、扭曲和弯折的规律性地应力。拉申和弯折是最风险的地应力。现阶段,钻杆疲惫毁坏的关键缘故是钻杆在弯折井孔中转动时产生规律性地应力引发。在弯折的井孔中,即便钻铤有充足的薄厚,依然很有可能产生疲惫毁坏,并且毁坏的部位不一定。当钻杆产生弯折时,钻杆每转动一圈,其相匹配的部位会因为可重复性的受拉和受力而造成规律性地应力ã€?br /> <br /> 挨近钻铤之上的钻杆最很有可能遭受弯折,由于钻铤具备很大的刚度,能抵御弯折,弯折将产生在钻铤之上的钻杆。另外钻杆上的较å¤?地应力产生于钻杆加厚型位置的尾端,约距连接头50公分的部位。如上所述,连接头不太可能弯折,弯折只有产生在壁厚较薄的钻杆体上,在这里横断面转变的部位,具有相近台钳固定不动的功效,使它变成弯折力的支撑点。假如钻杆在其总长上匀称地弯折,则功效于钻杆上的地应力会越来越低一些,疲惫毁坏的地应力周期时间数能够提升ã€?br /> <br /> 2、凹口疲惫损å?br /> 钻杆表层的不完好无损,不论是机械加工制造产生的,還是冶金工业全过程中产生的,都将大大的地危害钻杆的疲劳强度,其危害的水平在于缺点的部位、方位、样子和总数。假如凹口坐落于钻杆上的并不是关键地应力功效的位置,则对疲惫毁坏的危害较微ã€?br /> <br /> 可是,假如凹口坐落于距连接头50公分范畴内,因为这一位置是钻杆造成较大 的应力处,便会变成疲惫毁坏的关键。竖向凹口能外扩散地应力而无伤害。殊不知,一种即便是微小的但具备锐利底角的刻线,也会使地应力提升,并且造成毁坏。现将几类可导致凹口疲惫毁坏的钻杆表层状况列举如下:<br /> <br /> ï¼?)防伪标志图案设计:全部横着划痕都能变成应力点。假如在钻杆上的不适合部位打防伪标志,则防伪标志字体样式的横着划痕和随意部位的标识会变成钻杆疲惫的起止位置。不允许在钻杆体上复印。标识打在具备很大横截面积的钻杆加厚型消退位置,能安全性地消化吸收所造成的地应力。此外,可选用点印号以替代线印号,并使罗马数字防伪标志沿着钻杆竖向排序,也可具有安全性标识的实际效果ã€?br /> <br /> ï¼?)电孤烫伤:假如用钻杆做为接地装置用的搭铁线,通常会使搭忠实和火车轨道间产生电孤而使钻杆圆上上被烫伤,这种不容易注意到的小凹痕尽管极微小,但在钻杆上产生很宽的烫伤带。具备夹层玻璃硬延性,很容易加快疲惫毁坏ã€?br /> <br /> ï¼?)套胶护箍槽:在钻杆上的套胶护箍顶端产生的圆上槽是凹口疲惫毁坏的另一种缘故ã€?br /> <br /> ï¼?)大钳牙痕:在钻杆上的各种各样表层伤疤中,大钳牙痕是最普遍和最比较严重的。可是因为它是竖向的,不与作用地应力同一方向,因而对疲惫毁坏的危害不大。假如它略微偏移于竖直方位,就非常容易产生应力点。要把尖嘴钳打在接头顶而不必打在钻杆体上,因为它有可能损害钻杆ã€?br /> <br /> ï¼?)卡瓦伤疤:轮盘卡瓦一般不容易在钻杆上留出毁坏性的伤疤。可是假如卡瓦牙的生产加工欠佳,或实际操作不当,卡瓦牙会咬到钻杆ã€?br /> <br /> ï¼?)地质构造和管井粉碎金属材料对钻探设备表层的激光切割凹å?钻探设备在井旋转,表层会与硬实的井筒地质构造相擦,以致留有圆上刻线。这类刻线通常呈三角形,在钻杆和钻铤上均为普遍ã€?br /> <br /> 3、浸蚀疲惫毁坏<br /> 这类毁坏是现阶段使钻杆早上毁坏的广泛缘故。浸蚀很有可能以各种各样或多种综合性的毁坏方式(腐蚀、磨烂、疲惫)导致极其比较严重的毁坏。有时候,几类浸蚀方式会另外产生,可是一般说来,一直有一种浸蚀方式变成关键毁坏缘故ã€?br /> <br /> ï¼?)腐蚀剂:危害钻探设备不锈钢板材的关键腐蚀剂有:co2、二氧化碳、氯化氢、融解酸盐(氟化物、硫化物和硫酸钠、钙、镁)、各种各样异抗坏血酸(苯甲酸、冰醋酸等)ã€?br /> <br /> ï¼?)危害对流换热系数的要素<br /> PH值:低PH值的水性沙浆,会减少钻探设备的疲惫使用寿命。PH值是操纵浸蚀疲惫的关键要素,可是怎样精准测量出足够防止疲惫毁坏的最少PH值是艰难的。很多使用人觉得,沙浆PH值小äº?.5,会减少钻探设备的疲惫使用寿命。溫åº?绝大部分的对流换热系数会随溫度的提升而加速ã€?br /> <br /> 水流量:伴随着沙浆水流量的提升会加快浸蚀的速度。不匀称æ€?不锈钢板材成分或外部经济构造的部分差别,会提升对流换热系数ã€?br /> <br /> 高地应力:一般在承担高地应力的位置比低地应力位置的浸蚀率快ã€?br /> <br /> 更多钻杆知识关注濮阳市创立石æ²?a href="http://www.eipituco.com/supply/" target="_blank">钻杆修复</a>公司,多年的创新取得了十余项,一些主要技术指标达到国内石油行业水平,经验丰富,质量保证ã€?br /></p> <p><div>上一æ?<a href="138.html">钻杆修复公司分享:卡钻的原因和措æ–?/a></div> <div>下一æ?<a href="136.html">钻杆修复公司分享:怎样延长钻杆的使用寿命?</a></div> </p> <div class="tag"><span style="color:#a83838;">相关标签ï¼?/span></div> </div> </div> <div class="clearit"></div> <div class="comment"> <h2>相关新闻</h2> <h6 class="clear"></h6> <ul> <li><a target="_blank" href="/news/145.html" title="濮阳钻杆修复公司分享:旋挖钻机钻杆出现下滑的原因">濮阳钻杆修复公司分享:旋挖钻机钻杆出现下滑的原因</a></li> <li><a target="_blank" href="/news/144.html" title="钻具难拆装是怎么回事ï¼?>钻具难拆装是怎么回事ï¼?/a></li> <li><a target="_blank" href="/news/143.html" title="钻杆修复中耐磨带出现裂纹是什么原因?">钻杆修复中耐磨带出现裂纹是什么原因?</a></li> <li><a target="_blank" href="/news/142.html" title="钻杆修复中耐磨带也会出现一些小气孔是什么原因?">钻杆修复中耐磨带也会出现一些小气孔是什么原因?</a></li> <li><a target="_blank" href="/news/141.html" title="钻杆修复公司分享:耐磨带不竖直是什么原因?">钻杆修复公司分享:耐磨带不竖直是什么原因?</a></li> 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