• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (20): 320-329.doi: 10.3901/JME.2018.20.320

• 其他应用领域 • 上一篇    下一篇

一种新型井下排水采气泵的设计与仿真

童华, 陈明旸, 祝效华   

  1. 西南石油大学机电工程学院 成都 610500
  • 收稿日期:2017-10-30 修回日期:2018-04-28 出版日期:2018-10-20 发布日期:2018-10-20
  • 通讯作者: 祝效华(通信作者),男,1978年出生,教授,博士研究生导师。主要研究管柱力学与井下工具。E-mail:zxhth@163.com
  • 作者简介:童华,女,1979年出生,副研究员。主要研究管柱力学与井下工具。E-mail:tonghua@swpu.edu.cn;陈明旸,男,1988年出生,硕士研究生。主要研究方向为石油天然气钻采井下工具。E-mail:869804782@qq.com
  • 基金资助:
    四川省青年科技创新团队项目(2017TD0014)。

Design and Simulation of New Type of Drainage Gas Recovery Pump

TONG Hua, CHEN Mingyang, ZHU Xiaohua   

  1. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500
  • Received:2017-10-30 Revised:2018-04-28 Online:2018-10-20 Published:2018-10-20

摘要: 为进一步满足低压、低产气井的排水采气作业需求,降低运行成本,完善排水采气工艺,提出一种适用于直井、斜井、水平井,仅依靠储层中的天然气作为动力来源的新型井下排水采气泵。该泵基于气动增压原理,利用多级气缸增压并以机械闭环的控制方式驱动往复泵机构工作,从而将井筒内的积液泵送至地面。介绍新型排水采气泵的结构和工作原理,阐述工作流程并具体分析驱动气缸的控制方式与运动换向逻辑;建立排水采气泵的数学模型;最后,利用MATLAB/Simulink进行动态特性仿真,研究包括驱动气缸活塞直径、驱动气缸活塞行程、控制阀开关行程和换向阀阀芯直径在内的结构参数对系统动态特性的影响以及在不同载荷、驱动压力与增压比下的工作特性。通过仿真计算,确定了排水采气泵的结构参数,同时为实际运用中的选型提供了参考。

关键词: 模拟仿真, 排水采气, 气动增压, 数学模型

Abstract: To further meet the requirement of drainage gas recovery in low-pressure low-yield gas well, reduce operation cost and improve drainage gas recovery technique, this paper proposes a novel natural-gas-powered drainage gas recovery pump which is suitable for straight, inclined, horizontal wells. The proposed pump is designed based on pneumatic pressurization principle. The reciprocating pump is driven by pressure boost of multiple force cylinder in a closed-loop control mode, so that pumping fluids can be delivered from wellbore to ground. There are mainly three works presented. First, we introduced the structure and working principle of the novel drainage gas recovery pump, illustrated the working procedures, and made in-depth analysis of the control method and inverting logic of drive cylinder; second, the mathematical model of pump was established; Finally, the dynamic behaviors of proposed pump was simulated using MATLAB/Simulink. The influence of structure parameters (cylinder piston diameter, cylinder piston stroke, control valve switch stroke, commutator valve core diameter) on the dynamic behaviors of pump system was investigated. The pump working performance under different loads, driving forces and supercharge ratios was analyzed. Through simulation calculation, the structural parameters of drainage gas recovery pump was determined, which provides reference for model section in practical application.

Key words: drainage gas recovery, mathematic model, modeling simulation, pneumatic pressurization

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