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1、螺杆泵 progressive cavity pump (PCP) ELSEVIER1. Numerical prediction on volumetric efficiency of progressive cavity pump with fluidsolid interaction model jie Chen,He Liu,Fengshan Wang,Guochen Shi,GangCao,Hengan Wu(刘合、师国臣，陈杰等)对流固耦合模型的螺杆泵的容积效率的数值预测 2013Surface-driven progressive cavity pump (PCP) has be

2、en widely used as an effective artificial lift equipment in various oilfield productions. During the operation of PCPs, the problem of internal slip, which defines the pump performance in terms of volumetric efficiency and lifting capacity, always occurs. However, due to the complex geometrical stru

3、cture and coupling interactions between the stator and the oil lifted, it is difficult to solve the volumetric efficiency analytically. In this study, we established a new finite element model of PCP, which consists of the stator, the rotor, the lifted fluid and the fluidsolid interaction. The contr

4、olling equations of solid deformation and fluid dynamics are solved using different solvers for solid domain and fluid domain respectively, and their results are exchanged through the fluidsolid interface. Partitioned solution algorithm is employed to tackle the problem of this two-way fluidsolid in

5、teraction. From our numerical simulation results, we found two leakage mechanisms: longitudinal slippage and transversal slippage. We took GLB500 PCP as a benchmark to validate our model and simulation method. Our computed volumetric efficiency of PCP with specified design parameters is consistent w

6、ith experimental result of laboratory test. Furthermore, the model with fluidstructure interaction was used to compare the hydraulic characteristic curves of conventional and even-thickness PCPs and study the influence of different material and structure parameters on internal slip of PCP. The inter

7、ference and stator thickness are found to be the two main factors influencing the volumetric efficiency, which can be used to optimize the design of PCP for specified purpose.地面驱动螺杆泵（PCP）作为人工举升设备已经在各种油田生产中广泛使用。在螺杆泵的使用过程中总是发生内部滑动，其中内部滑动定义了泵在容积效率和起重能力方面的性能，然而，由于在定子和举升液之间复杂的几何结构和耦合作用，容积效率的解析问题是难以解决的。在这

8、项研究中，我们建立一个新的螺杆泵的有限元模型，它由定子，转子，举升流体和流固耦合（fluidsolid interaction）组成。分别利用不同求解器对固体域和流体域求解得到固体变形和流体动力学的控制方程的结果，并且使它们的结果通过流体 - 固体界面交换。用分区求解算法来解决这个双向流固耦合的问题。从我们的数值模拟结果，我们发现了两个漏失机制：纵向漏失和横向漏失。我们用GLB500螺杆泵为基准来验证我们的模型和模拟方法。有指定的设计参数的螺杆泵的计算容积效率与实验室检测的实验结果是一致的。此外，用该流体 - 结构交互模型比较常规的和等壁厚螺杆泵水力特性曲线、研究不同的材料和结构参数对PCP内

9、部滑动的影响。我们发现干扰和定子厚度是影响容积效率的两个主要因素，它们可用于为特定目设计优化PCP。等壁厚螺杆泵流固耦合数值模拟研究建立考虑流固耦合作用的等壁厚螺杆泵三维动力学模型,模拟研究了等壁厚螺杆泵结构参数对定子温溶胀、负载扭矩、容积效率等主要性能的影响,分析总结出各参数的影响规律,形成一套比较完善的等壁厚螺杆泵结构参数优化体系;考虑螺杆泵定子橡胶与举升液的双向流固耦合作用,模拟得到等壁厚螺杆泵的两种漏失形态:横向漏失和纵向漏失,并对特定结构螺杆泵的容积效率进2. Three dimensional dynamics simulation of progressive cavity pu

10、mp with stator of even thickness等壁厚螺杆泵的三维动力学仿真 2013X.Z.Zhou,G.C.Shi,G.Cao,C.L.Sun,Y.He,H.Liu,H.A.Wu（刘合、吴恒安等）Surface-driving progressive cavity pump (PCP) has been widely used as an effective artificial lifting device in various oil field productions. However, non-uniform thermal and swelling expansi

11、on results in high laden torque of conventional PCP. New PCP with stator of even-thickness is a good alternative. To design and optimize even-thickness PCP, three-dimensional finite element simulation is employed to study the dynamics of the system of stator and rotor. Our computed laden torque for

12、the given design parameters is in good agreement with the experimental result of laboratory test, which can verify our model and the simulation method. The relationship between the laden torque and the design parameters, such as wall thickness, magnitude of interference, rotational speed and eccentr

13、icity, is investigated. Our results show that the laden torque of even-thickness PCP is significantly reduced. The magnitude of interference and the thickness of stator are the two main factors that influence the laden torque. Our fitted quadratic function can calculate the laden torque due to inter

14、ference more accurately than traditional linear function. Our work can be of great significance for guiding the design and optimization of new PCP.地面驱动的螺杆泵（PCP）作为人工举升设备已经广泛的在各种油田生产中使用。然而，非均匀的受热和膨胀导致常规的螺杆泵产生高扭矩。有等壁厚定子的PCP是一个很好的选择。为了设计和优化等壁厚PCP，用三维有限元仿真来研究定子和转子的系统的动态特性。我们用给定的设计参数计算出来的负载扭矩与实验室测试的实验结果是一

15、致的，这可以验证我们的模型和仿真方法。对负载扭矩与设计参数，诸如壁厚，干扰，转速和偏心大小之间的关系进行了研究。我们的研究结果表明，等壁厚PCP的负载扭矩显著减少。过盈量和定子的厚度是影响该负载扭矩的两个主要因素。我们的嵌合二次函数可以比传统的线性函数更准确地计算出由于干扰产生的负载扭矩。我们的工作对于指导新的PCP的设计和优化具有重要意义。*3. Modeling the design and performance of progressing cavity pump using 3-D vector approach 2014使用3-D向量方法对螺杆泵的设计和性能建模Tan Nguyen

16、, Eissa Al-Safran, Arild Saasen, Olav-Magnar NesProgressing Cavity Pumps (PCP), a type of Moineau pumps, is an artificial lift method often used for high viscosity and solids producing wells. In this paper, the three-dimensional vector theory and the theory of Hypocycloid were used to give a new mod

17、eling insight into the design and performance of PCPs. Specifically, a new design model and procedure of PCPs was developed and described in detail, in addition to a new mathematical model to determine the theoretical pump factor for any given PCP. A Sensitivity analysis was carried out to study the

18、 effects of the pump eccentricity, semicircle diameter and motor rotational speed on the pump performance. The results of this study are not only important for manufacturers to optimize PCPs design, but also for operators to improve the performance and efficiency of such PCPs.螺杆泵（PCP），一种Moineau泵，是通常

19、用于高粘度和固体生产井的人工举升方法。在本文中，用三维矢量理论和摆线理论建立一个新的模型用来洞察PCP的设计和性能。具体而言，一个新设计的PCP的模型和程序是详细描述的，此外，对于任意给定的PCP，都可以用一个新的数学模型来确定理论泵因素。用敏感性分析研究偏心、半圆的直径与电机转速对泵性能的影响。本研究的结果，对制造商优化PCP的设计、运营商改善这样的PCP的性能和效率都有重要作用。EI4. Back spin braking simulation analysis for direct-driven progressive cavity pump螺杆泵直驱地面装置防反转制动模拟分析，2011

20、Jiang,Xintong;Li Yong;Zhao,ZhenkuiProgressive cavity pump(PCP) petroleum production is a new mechanical mining style which is rapidly developed in the last 10 years. In this paper, a new PCP system of surface direct-driven is designed. Comparing with the traditional screw pump system, operational re

21、liability enhance for reducing the mechanical decelerator, and manipulation become flexible. Because back spin is a key problem of screw pump system, reversal braking function is increased to overcome hazard bring from it. In order to research sucker rod storage energy and system dynamic braking, a

22、mathematics model is built and system simulation is performed. Some conclusions and suggestions were given in the paper, which is some reference value to the design and control of surface direct-driven screw pump system.用螺杆泵（PCP）进行石油开采是一种新的机械采矿风格，在过去的十年中迅速发展。本文设计了一种新的地面直接驱动的螺杆泵系统。与传统的螺杆泵系统相比，减少了机械减速

23、器，使操控变得灵活，从而增强了操作的可靠性，因为反转是螺杆泵系统的一个关键问题，增加反转制动功能，以克服由它带来的危害。为了研究抽油杆储能系统和动态制动，建立数学模型和进行系统仿真。文中给出了一些建议和结论，这对于设计和控制地面直接驱动的螺杆泵系统具有一定的参考价值。5Slippage and abrasion mechanism of progressive cavity pump 2010螺杆泵的滑动和磨损机制Jin,Hong-jie;Wu,Heng-An;Liu,He;Wang,Xiu-Xi（刘合，吴恒安等）Three dimensional numerical simulations

24、are conducted to study the fluid dynamics and structural mechanics of the progressive cavity pump (PCP). The influences of lifted-fluid pressure are analyzed, and a new mechanism for the slippage and abrasion of PCP is presented. The computational fluid dynamics model of the connected cavity is cons

25、tructed, and the finite volume method is employed to compute the pressure distribution in the cavity. The pressure on the rotor is further obtained. A three-dimensional finite element model is also constructed to simulate the contact and interaction between the stator and rotor, with the forces and

26、torques acting on the rotor by cavity pressure. The stress and strain states of the stator are investigated. The results indicate that the force on the rotor is the main cause of slippage, while the torque on the rotor is the main cause of abrasion at the top and bottom of the stator.用三维数值模拟方法，研究了螺杆

27、泵（PCP）流体动力学和结构机理。对流体举升压力的影响进行了分析，并且提出了滑移和PCP磨损的新机制。构造了所连接的腔室的计算流体动力学模型, 用有限体积方法，计算所述腔中的压力分布。进一步获得转子上的压力。还构造了三维有限元模型来模拟定子和转子之间的接触和相互作用，模拟力和力矩通过模腔压力作用在转子上。对定子的应力和应变的状态进行了研究。结果表明，在转子上的力是滑动的主要原因，而在转子上的扭矩是在定子的顶部和底部发生磨损的主要根源。*6, Experimental Study of Two-Phase Pumping in a Progressive Cavity Pump Metal to

28、 Metal 2002双金属螺杆泵的两相泵实验研究Olivet, Aurelio1; Gamboa, José2; Kenyery, Frank3 Progressive cavity pump metal to metal has its two elements, rotor and stator, made from a metallic material. It has been demonstrated that this pump can reach an acceptable volumetric efficiency with high viscosity fluid

29、s. However, the performance of the pump with two-phase flow has never been investigated. There are not field or experimental tests which provide tools to predict the behavior of the pump in such applications. If progressive cavity pump metal to metal were able to handle high viscosity fluids with ga

30、s void fractions, as well as conventional progressive cavity pumps, it could be found a range of application for using this pump in heavy oil production. Its advantages would be valious, since it doesn't have the problems due to the use of elastomer stators. In this research the progressive cavi

31、ty pump metal to metal performance has been studied. Characteristic curves and instantaneous pressure profiles along the pump with single-phase and two-phase flow have been obtained experimentally. The results show that the internal slip with two-phase flow is a function of gas void fraction, differ

32、ential pressure and rotational speed. Under some conditions an increase in volumetric efficiency occurs when the gas void fraction is increased. Instantaneous pressure profiles explain the changes of internal sealing lines when gas void fraction changes, also show that longitudinal pressure distribu

33、tion along the pump have a linear behavior for single-phase and two-phase pumping. The knowledges acquired with this research are useful for understanding the progressive cavity pump metal to metal performance in two-phase pumping applications and also can be used in the future for theorical modelin

34、g of the pump.双金属螺杆泵有两个要素，转子和定子，由金属材料制成。已经证实，这种泵在高粘度的流体下可以达到可接受的容积效率。然而，二相流泵的性能从未被研究。有一些非现场或实验的测试提供工具来预测在这种应用中泵的行为。如果双金属螺杆泵能够处理有小气体空隙的高粘度流体，和常规的螺杆泵一样，那么它可以使此泵在重油生产中找到一个应用范围。它的优点是valious（多样化various），因为它不具有由于使用弹性体定子所产生的的问题，在此研究中对金属对金属螺杆泵的性能进行了研究。特性曲线以及单相和二相流泵的瞬时压力分布图已经通过实验获得。该结果表明，二相流的内部滑动是气体空隙率，差压和转速

35、的函数。在某些条件下，当气体空隙率增大时容积效率也增大。瞬时压力分布图解释了当气体空隙率改变时内部密封线的变化情况，也表明单相和两相泵沿泵的纵向压力分布具有线性特性。本研究获得的知识对于理解金属对金属螺杆泵在两相泵应用中的性能是非常有用的，也可以在将来用于泵的理论性的建模。7. Simulation research on unsteady helical flow of well liquid in surface-driven progressive cavity pump well对地面驱动螺杆泵井井液的不稳定螺旋流的仿真研究 2010Yanping, Lv1  Wu

36、, XiaodongSingle surface-driven progressive cavity pump(pcp) is mainly applied in viscous crude well and polymer flooding one. The liquid flowing in those wells complies with power law pattern. Well liquid in the annulus between the pumping rod and tubing of pcp well presents helical flow under the

37、action of rapidly rotating pumping rod and pcp pressure difference. At present in most research, this flow was considered as the axial flow of Newtonian fluid. For this, unsteady mathematical model of power law fluid in annulus helical flow between pumping rod and tubing of surface-driven pcp well w

38、as established. Finite difference method was adopted to solve the equation of motion. And numerical solution was obtained. Flow field parameters were analyzed with sensitivity. © 2010 IEEE.(9 refs)单一地面驱动螺杆泵（PCP）主要适用于稠油井，聚合物驱油井。流淌在这些井中的液体符合幂律模式，在抽油杆和螺杆泵井管之间环形空间的井液在快速旋转抽油杆和螺杆泵压力差的作用下呈现出螺旋流。目前，在大多

39、数研究中，这个流被认为是牛顿流体的轴向流动。为此，建立了在抽油杆和地面驱动PCP以及油管之间的环形空间的螺旋流幂律流体的不稳定的数学模型。用有限差分法，解决运动方程和获得数值解。对流场参数进行敏感性分析。 *8. Producing heavy oil by thermal progressive cavity pump in steam stimulation process 2009热采螺杆泵在蒸汽吞吐过程中的稠油生产（稠油的蒸汽热采）Zhang, Shoujun1; Zhong, Liguo2; Song, Fujun2; Lang, Baoshan2;&#

40、160;Wu, Fei2; Luo, EnyongAs a new potential mean of artificial lift production, production using progressive cavity pump (PCP) has many advantages such as energy saving, lower first investment, and convenient in management. However, it is more challenging to implement this lifting method to the

41、rmal production of heavy oil for the temperature limitation of elastomer stator and bonding agent, and hostile temperature vibration in the wellbore environment, as a result, up to date, there is no application of PCP to thermal heavy oil production in Liaohe Oilfield which is the largest heavy oil

42、field in China. An applicable thermal PCP developed based on extensive testing is introduced in this paper. It involves an applicable thermal fluororubber stator and bonding agent which could operate under high temperature conditions (up to 210°C) enough for the thermal requirement of steam inj

43、ection, and great temperature vibration condition in the wellbore ranging from 80°C to 210°C. The whole top-drive thermal pumping unit is designed in consideration of thermal wellbore environment in heavy oil production procedure of steam stimulation. The thermal PCPs have been applied to

44、5 wells and detailed field testing dynamic is monitored and investigated. Favorable performance of the thermal pumping unit is observed in the rugged production environment (the measured wellbore fluid temperature is up to 165 °C ) for more than 6 months, and the pump efficiency is about 60%70%

45、. Compared with the conventional rod pumping lift production, about 20% increase in periodical cumulative oil production and 50% lower horsepower requirements is obtained. In summary, the developed thermal progressive cavity pump is feasible for heavy oil production in steam stimulation process, whi

46、ch could operate under extensive temperature range, and the upper limitation is up to 210°C作为人工举升生产中的一个新的潜在的方式，使用螺杆泵生产有许多优势，如节能减排，降低一次投资，又方便管理。然而，由于弹性体定子和粘接剂的温度限制和井眼环境恶劣的温度振动，把这种举升方法实施到稠油生产中更加具有挑战性，其结果是，到目前为止，中国最大的稠油油田辽河油田没有应用PCP进行热稠油开采。本文介绍了基于广泛的测试研发的，可应用的热PCP。它涉及一个可应用的热氟定子和粘接剂，它可以在高温条件下操作（高达2

47、10），对于蒸汽注入的热需求是足够的，并且井筒的极大温度振动范围是从80到210的。整顶驱动热抽油机的设计中考虑了蒸汽吞吐稠油生产过程的热井眼环境。热的PCP已应用到5个井，并进行了详细的实地测试，动态监测和调查。热抽油机的有利性能是在粗糙的生产环境（所测量的井眼流体的温度高达165）下经过6个月以上时间观察到的，泵的效率为约6070。与传统的杆泵举升生产相比，可以增加大约20的定期累计采油量，降低50的功率要求。总之，发达的热采螺杆泵用于蒸汽吞吐过程中的重油生产是可行的，它可以在广泛的温度范围内操作，并且上限高达210。9.Mechanic model for crooked rod of

48、surface-driving progressive cavity pump 2003地面驱动螺杆泵井抽油杆弯曲的力学模型Shi, Guo-Chen1; Chen, Zhuo-Ru1; Wu, Xiao-Dong1; Wang, Shi-Zhan （师国臣等）When surface-driving progressive cavity pump is used for oil production, there are a lot of factors causing rod to be crooked such as winding well-bore or

49、 material anisotropy of rod. Then the force acting on the rod may be changed. In order to avoid the loss caused by uncertainty of acting force on rod, the force states of crooked rod were analyzed with the differential method and iteration method. The results show that crooked rod stands the shearin

50、g force, bending stress, fraction force and torque of friction for rod bending, except the torque and axial force on rod. The method for calculating torque and axial force may be changed with the extra forces on the crooked rod. A mechanic model for the crooked rod of the surface-driving progressive

51、 cavity pump was established on the above results. The calculation result of this model was compared with the measured data. It is proved that the model is suitable and accurate on site. 用地面驱动螺杆泵采油时 ,井筒的弯曲或者抽油杆材质的不均匀性会导致抽油杆在井筒中的弯曲 ,从而改变抽油杆的受力状况。为了最大限度地减少因抽油杆受力的不确定性而对生产造成的危害 ,采用微元分析和分段迭代的方法 ,对抽油

52、杆弯曲后的受力状况进行了研究。结果表明 ,除了正常作用在抽油杆上的扭矩和轴向力以外 ,抽油杆弯曲后还会受到由于弯曲变形引起的剪切应力、弯曲应力以及井筒与其接触的摩擦阻力和摩擦扭矩等。光杆扭矩和轴向力的计算方法应根据各种附加力的产生而发生改变。根据研究结果 ,建立了地面驱动螺杆泵抽油杆柱弯曲的力学模型 ,其计算结果与现场测试资料对比表明 ,该模型是比较准确的。10. Numerical simulation on unsteady temperature field of progressive cavity pump stator with double heat source双热源螺杆泵定子的非稳态温度场的数值模拟 2012Xue, Jian-Quan1; Zhang, Guo-Dong1; Wu, Shen-Qu1; Li, Min-Hui1; Gu, Guo-Ji