快速产生钻井液连续波信号的往复阀阀口设计

发布时间：2019-07-21 07:39

【摘要】：针对锥阀式和旋转阀信号发生器存在正脉冲信号频率较低、阀口分布空间受钻柱径向尺寸限制和供液能力不足等问题,设计了能快速产生连续波信号的往复阀。在介绍该往复阀的组成及连续波信号产生机理的基础上,建立了阀口形状曲线的数学计算模型,并研究了阀口形状与阀口排布对连续压力波产生特性的影响。模拟计算结果显示,设计的阀口(单排阀口数量4个、沿轴向阀口排数3排)产生的压力波与理想正弦压力波的相关系数达到了0.965 7,最大频率达到了10Hz。研究结果表明,设计的往复阀阀口能够产生近似正弦波的连续压力波,并可以减小阀芯往复运动的位移、缩短往复运动周期,从而提高压力波信号产生的频率。
[Abstract]:In order to solve the problems of conical valve type and rotating valve signal generator, such as low positive pulse signal frequency, limited valve port distribution space by drill string radial size and insufficient liquid supply capacity, a reciprocating valve which can quickly generate continuous wave signal is designed. On the basis of introducing the composition of the reciprocating valve and the generation mechanism of continuous wave signal, the mathematical calculation model of valve port shape curve is established, and the influence of valve port shape and valve port arrangement on the characteristics of continuous pressure wave is studied. The simulation results show that the correlation coefficient between the pressure wave and the ideal sinusoidal pressure wave produced by the designed valve port (4 single row valve ports and 3 rows along the axial valve port) is 0.965 7, and the maximum frequency is 10 Hz. The results show that the designed valve port can produce continuous pressure wave similar to sine wave, reduce the displacement of valve core reciprocating motion, shorten the reciprocating motion period, and thus increase the frequency of pressure wave signal.
【作者单位】：石油工程教育部重点实验室(中国石油大学(北京));石油工程教育部重点实验室(中国石油大学(华东));
【基金】：国家自然科学基金项目“井下钻井液往复控制连续波信号的产生特性研究(编号:51474230)”;国家自然科学基金创新研究群体项目“复杂油气井钻井与完井基础研究”(编号:51521063) 国家重点研发计划课题“钻井工艺及井筒工作液关键技术研究”(编号:2016YFC0303303)资助
【分类号】：TE927

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