【作者】 秦笃国；

【导师】 刘宏； 何贯中；

【作者基本信息】 大庆石油学院 ， 石油与天然气工程， 2007， 硕士

【摘要】 针对大庆油田聚驱后大量抽油机井杆管严重偏磨、检泵周期缩短,生产成本增加,严重影响油田正常生产的问题,开展了含聚抽油机井杆管偏磨治理技术研究。本研究通过粘弹性流体动力学理论研究,建立了粘弹性流体的本构方程和在偏心环空的流动方程,找出了粘弹性流体在油管及泵筒内流动时的运动规律及影响法向力大小的相关因素。通过粘弹性流体在油管和抽油杆环空流动试验研究,在国内外首次发现了不同浓度粘弹性流体的法向力大小与流速及抽油杆偏心度的关系,确定了粘弹性流体流过井筒、泵阀及泵筒时流动阻力的变化规律,提出了含聚抽油机井杆管偏磨的主要原因是粘弹性流体法向力的偏磨机理。在上述研究的基础上,提出了由抽油杆全井扶正、大流道三级泵(低磨阻泵)、统一杆径(加重)、旋转抽油杆组成的防偏磨配套措施。现场6266口井试验证明,该防偏磨配套措施有效地解决了抽油机井杆管偏磨问题,经济效益显著。更多还原

【Abstract】 The serious sucker-rod wear exits in many polymer flooding pumping units in Daqing Oilfield, so that the pump inspection cycles are shorten, the production cost increases and normal production is influenced severely. therefore, the research on the technology of disposal of the sucker-rod wear in polymer flooding pumping units.In this project, the constitutive equation and the flow equation in eccentric annulus of viscoelastic fluid are established by the research of the viscoelastic fluid kinetics theory. The motion rules of the flow of viscoelastic fluid in oil pipe and pump barrel and the correlation factor which influences the magnitude of normal force are found. The relation between the magnitude and the velocity rate of normal force of viscoelastic fluid in different concentration and eccentricity of rod string is found firstly in domestic and broad, the conversion law is ascertained when the viscoelastic fluid flows the well bore ,pump valve and pump bore, that the reason for the sucker-rod wear mechanism in polymer flooding pumping units is the normal force of viscoelastic fluid is brought forward.Based on the above research, the measures about serious sucker-rod wear that centralizing the hole well, the third level pump (low friction pump) of large drainage, unifying the diameter of rod and rotating rod string are brought forward. Testified by the trials on 6266 wells in the Oilfield, the sucker-rod wear of pumping units is solved effectively, the economic benefit is prominent.更多还原