总装图
井控节流阀的结构设计
[摘要]在石油的钻采和开发的过程中，常常需要实施压井作业，给井底适当的回压从而来平衡与地层的压力，压井作业原理是通过调节井控节流阀的开度的调节对井中的流体产生一定的阻力，来产生一定的回压，因此，井控节流阀在钻井控压的过程中起到了关键性的作用，通过流阀的开度的调节节来控制井内的压力，从而防止井喷等事故的发生。
本文主要针对井控节流阀在现场工作中泥浆通过节流口后易向壳体冲去，对阀座以及侧壁造成冲击磨损和腐蚀等问题，主要对公称通径DN52.4、设计压力70MPa的井控节流阀进行研究。首先通过对国内外几种井控节流阀阀芯的优缺点分析，最终选择楔形阀芯结构，并在原有基础上对其进行了结构改进；其次还对阀体、阀盖、阀杆、阀芯等主要零件进行了参数校核和结构优化，并重新进行材料选择；再次利用有限元软件对阀体，阀盖、阀杆和阀芯分别进行了有限元分析优化，校核了其强度，保证其安全可靠。
[关键词]井控节流阀；参数计算；有限元分析；阀芯结构
Structural optimization and design ofwell control throttlevalve
[Abstract] In the process of oil drilling, production and development, it is often necessary to carry out killing operation to balance the formation pressure by giving proper back pressure to the bottom of thewell. The killing operation principle is to produce certain back pressure by adjusting the opening ofwell-controlled throttlevalve to produce certain resistance to the fluid in thewell. Flowvalve plays a key role in the process of drilling pressure control. The pressure in thewell is controlled by adjusting the opening of the flowvalve, so as to prevent blowout and other accidents.
In this paper, aiming at the problems of slurry rushing to the shell easily after thewell-controlled throttlevalve passes through the throttle port in the fieldwork,which causes impactwear and corrosion to thevalve seat and sidewall, thewell-controlled throttlevalvewith nominal diameter DN52.4 and design pressure 70MPa is mainly studied. Firstly, by analyzing the advantages and disadvantages of several kinds ofwell-controlled throttlevalve spools at home and abroad, thewedge-shapedvalve spool structurewas selected and its structurewas improved on the original basis. Secondly, the main parts such asvalve body,valve cover,valve stem andvalve spoolwere checked and optimized, and the materialwas selected again. The finite element software carries on the finite element analysis and optimization to thevalve body, cover, stem and spool respectively, checks its strength and ensures its safety and reliability.
[keywords]well-controlled throttlevalve; parameter calculation; finite element analysis;valve core structure
目录
1前言1
1.1课题研究目的与意义1
1.2国内外研究2
1.3本文研究内容4
2井控节流阀的选型与改进6
2.1井控节流阀阀芯的常见形式6
2.2楔形节流阀9
2.3本章小结13
3参数确定与强度校核14
3.1阀体壁厚确定14
3.2阀座密封比压校核16
3.3阀杆强度校核18
3.4中法兰及连接螺栓的强度校核20
3.5阀杆螺母梯形螺纹强度校核24
3.6填料压盖及压紧螺栓强度校核26
3.7本章小结28
4井控节流阀主要零件结构优化29
4.1阀体结构优化29
4.2阀杆结构优化30
4.3法兰结构选型31
4.4阀芯结构优化33
4.5防冲蚀结构优化34
4.6本章小结35
5总结36
参考文献36
致谢37
短接本体
阀盖
阀杆
阀体
阀芯
设计所包含文件
所包含图纸
字数统计
参数确定与强度校核
说明书前三页
