|Table of Contents|

Drop force analysis and tool angle optimization in eddy current tool(PDF)


Research Field:
Publishing date:


Drop force analysis and tool angle optimization in eddy current tool
Liu ChengtingLiu GangYan Zuoxiu
Petroleum Engineering Institute,Northeast Petroleum University,Daqing 163318,China
eddy current tool equation of motion force analysis drainage and gas recovery optimization
The eddy current tool can change the flow field of the downhole flow field and is a new type of drainage and gas recovery technology. The helix angle determines the status of the downhole flow field. The well bore flow for installation of the eddy current tool is different from that for conventional gas well. For this reason,the forces acting on droplets in gas production well bore are applied. Then the effects of gravity,buoyancy,centrifugal force,Saffman force,Magnus force and other typical forces on the droplet are analyzed and the causes of the formation of the forces are discussed. Equations of droplet motion are established. After comparing the magnitudes of different forces,the equation is simplified and the mathematical formula of the optimum helix angle is obtained. Finally,the reliability of the mathematical model is verified by comparing the numerical simulation of field production data.


[1] 叶长青,熊杰,康琳洁,等. 川渝气区排水采气工具研制新进展[J]. 天然气工业,2015,35(2):54-58.
Ye Changqing,Xiong Jie,Kang Linjie,et al. New progress in the R&D of water drainage gas recovery tools in Sichuan and Chongqing gas zones[J]. Natural Gas Industry,2015,35(2):54-58.
[2]杨涛,余淑明,杨桦,等. 气井涡流排水采气新技术及其应用[J]. 天然气工业,2012,32(8):63-66.
Yang Tao,Yu Shuming,Yang Hua,et al. A new technology of vortex dewatering gas recovery in gas wells and its application[J]. Natural Gas Industry,2012,32(8):63-66.
[3]Ali A J. Investigation of flow modifying tools for the continuous unloading of wet-gas wells[D]. College Station:Texas A&M University,2003.
[4]Mingaleeva G R. On the mechanism of a helical motion of fluids in regions of sharp path bending[J]. Technical Physics Letters,2002,28(8):657-659.
[5]杨旭东,李丽,张军. 井下涡流工具排水采气机理研究[J]. 石油机械,2015,43(5):81-86.
Yang Xudong,Li Li,Zhang Jun. Study on drainage and gas recovery mechanism of downhole eddy tools[J]. Petroleum Machinery,2015,43(5):81-86.
[6]徐建宁,邵乐,梁慧荣,等. 基于正交实验的涡流排水采气影响因素分析[J]. 石油矿场机械,2014,43(11):52-56.Xu Jianning,Shao Le,Liang Huirong,et al. Analysis of influencing factors on eddy drainage gas recovery based on orthogonal experiment[J]. Petroleum Field Machinery,2014,43(11):52-56.
[7]Surendra M,Falcone G,Teodoriu C. Investigation of swirl flows applied to the oil and gas industry[J]. SPE Projects,Facilities & Construction,2009,4(1):1-6.
[8]Turner R G,Hubbard M G,Dulker A E. Analysis and prediction of minimum flow rate for the continuous removal of liquids from gas wells[J]. Journal of Petroleum Technology,1969,21(11):1475-1482.
[9]李雪斌,袁惠新,曹仲文. 旋流场内分散相颗粒的受力特性分析[J]. 金属矿山,2007(12):101-103.
Li Xuebin,Yuan Huixin,Cao Zhongwen. Charac-teristics analysis of forces on dispersal particles in swirling flow field[J]. Metal Mine,2007(12):101-103.
[10]郭烈锦. 两相与多相流动力学[M]. 西安:西安交通大学出版社,2002.
[11]曹仲文,袁惠新. 旋流器中分散相颗粒动力学分析[J]. 食品与机械,2006,22(5):74-76.Cao Zhongwen,Yuan Huixin. Dynamic analysis of dispersed particles in the swirling flow fleld[J]. Food & Machinery,2006,22(5):74-76.
[12]Rubinow S I,Keller J B. The transverse force on a spinning sphere moving in a viscous fluid[J]. Journal of Fluid Mechanics,1961,11(3):447-459.
[13]Saffman P G. The lift on a small sphere in a slow shear flow[J]. Journal of Fluid Mechanics,1965,22(2):385-400.
[14]刘承婷,刘钢,张维薇. 脉冲周期对射流泵引射液体量的影响[J]. 南京理工大学学报,2018,42(5):609-614,621.
Liu Chengting,Liu Gang,Zhang Weiwei. Effect of pulse period on the amount of jet pumped by jet pump[J]. Journal of Nanjing University of Science and Technology,2018,42(5):609-614,621.
[15]朱诚,郑林. 基于格子Boltzmann方法的热毛细对流数值模拟研究[J]. 南京理工大学学报,2017,41(6):773-778.
Zhu Cheng,Zheng Lin. Numerical simulation of thermocapillary convection based on lattice Boltzmann method[J]. Journal of Nanjing University of Science and Technology,2017,41(6):773-778.


Last Update: 2019-09-30