【作者】 许宏奇；

【导师】 肖文生； 张宝生；

【作者基本信息】 中国石油大学 ， 机械工程， 2007， 硕士

【摘要】 闸板防喷器是井控系统中最重要的设备,闸板胶芯和侧门密封等是闸板防喷器的关键密封件。目前国内闸板防喷器关键密封件存在的突出问题是:变径闸板密封范围小;侧门密封不可靠;橡胶材料不耐硫化氢,不能完全满足现场井控工艺要求。本课题针对上述问题开展了设计与研究。以FZ35-70闸板防喷器为研究对象,对其2 7/8″～5″变径闸板前密封进行了结构设计,应用MSC.Marc有限元软件对橡胶变形和应力进行了非线性分析,进行了产品型式试验;对侧门密封的失效原因进行了分析,计算了侧门变形,设计和试验了新型密封结构;对闸板胶芯橡胶材料的耐硫化氢性能进行了全面测试和评价。通过上述研究,研制成功2 7/8″～5″变径闸板前密封,探索了非线性有限元分析用于复杂弹性体模拟计算的新方法;提出了侧门变形的简化计算模型和计算方法,设计了两种新型密封结构,试验效果良好;测试表明氢化丁腈橡胶可用作耐高浓度硫化氢闸板胶芯,常用的丁腈橡胶闸板胶芯可在低浓度硫化氢环境短时间工作。更多还原

【Abstract】 Ram BOP(Blowout preventer) is the most important equipment of well control system, ram packer and bonnet seal and so on are the key for the ram BOP. At present, there are some serious problems existing in ram BOP interiorly, for example, the sealing rang of VBR (variable ram) is narrow, sealing of the bonnet seal is unreliable, rubber material can not resistant H2S and can not meet with the requirements of the drilling location. Therefore, this article has a design and research for the rubber seal of ram BOP. In this article ,we focus on the FZ35-70 ram BOP, and have a structure design for the front seal of 2 7/8″～5″VBR, and have a non-linear analyse for the distortion and stress of rubber by using the FEA software , MSC.Marc, and then have a product test. At the same time, we have analyzed the failure reasons of bonnet seal, calculated the bend of bonnet, and designed and test new structure bonnet seal. Further more, we have test and evaluated the trim H2S material performance at all. We have developed and manufactured the ram packer of 2 7/8″～5″VBR, developed a new method to calculate the complicated elastomer by using non-linear FEA software, and brought a simple calculation model and control method. Then, we designed two kinds of new seal structure, the testing result is very well. According the test, it shows that the HNBR can be used as ram packer to resistant high concentration H2S, and NBR that we usually use can be worked in lower concentration H2S service in short time as ram packer.更多还原