钻井机器人偏心流道冲蚀实验及数值模拟研究

doi:10.11885/j.issn.1674-5086.2020.11.02.01

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (2): 167-177.DOI: 10.11885/j.issn.1674-5086.2020.11.02.01

钻井机器人偏心流道冲蚀实验及数值模拟研究

肖晓华¹, 代继樑², 朱海燕³, 赵建国²

1. 西南石油大学网络与信息化中心, 四川成都 610500;
2. 西南石油大学机电工程学院, 四川成都 610500;
3. 油气藏地质及开发工程国家重点实验室·成都理工大学, 四川成都 610059

收稿日期:2020-11-02 出版日期:2021-04-10 发布日期:2021-04-23
通讯作者: 肖晓华,E-mail:xiaoxh@swpu.edu.cn
作者简介:肖晓华,1965年生,女,汉族,四川资阳人,副教授,主要从事机械设计及理论和井下智能钻完井工具研究工作。E-mail:xiaoxh@swpu.edu.cn
代继樑,1994年生,男,汉族,四川达州人,硕士研究生,主要从事井下井下智能钻完井工具的研究。E-mail:daijl666@163.com
朱海燕,1984年生,男,汉族,安徽亳州人,教授,博士生导师,主要从事石油钻采岩石力学及智能钻完井应用基础研究。E-mail:zhuhaiyan040129@163.com
赵建国,1988年生,男,汉族,四川中江人,讲师,博士,主要从事井下机器人等钻完井工具及工艺研究。E-mail:469650774@qq.com
基金资助:
国家自然科学基金（52004232，U19A2097，2018YFC0310200）；四川省科技计划资助（2019YFG0458，2021YJ0403）

Experimental and Numerical Simulation Research on Eccentric Flow Channel Erosion of Drilling Robot

XIAO Xiaohua¹, DAI Jiliang², ZHU Haiyan³, ZHAO Jianguo²

1. Network & Information Center, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China

Received:2020-11-02 Online:2021-04-10 Published:2021-04-23

摘要/Abstract

摘要： 为解决大位移水平井连续油管钻井管柱屈曲的难题，提出了钻井液驱动的“钻井机器人+动力钻具”的连续油管钻井新方法。依据机器人外形尺寸、水力压耗、内部结构、加工制造等优化设计出了三段式偏心圆流道结构。提出了三段式偏心圆流道冲蚀分析方法，首先，建立了钻井机器人三段式偏心圆流道流固耦合冲蚀数值模型，分析了粒径参数、速度参数等对冲蚀速率的影响规律；其次，开展了钻井机器人偏心流道冲蚀实验，校准了钻井机器人三段式偏心圆流道流固耦合冲蚀数值模型；基于此进一步开展了钻井机器人三段式偏心圆流道数值仿真研究。研究表明，钻井机器人三段式偏心圆流道最佳倾角为5°，当流道壁厚5 mm时，偏心流道寿命超过300 h，满足一般井下工具的工作寿命要求；流道主要冲蚀点位置和冲蚀形态数值仿真与实验基本符合。研究为钻井机器人结构设计及工程化应用提供了理论依据，对促进连续油管钻井技术在大位移水平井的推广及应用具有重要的意义。

关键词: 连续油管钻井, 钻井机器人, 流道设计, 冲蚀, 数值模拟

Abstract: In order to solve the problem of coiled tubing buckling drilling in extending reach in horizontal wells, a new coiled tubing drilling method of "drilling robot + power drilling tool" driven by drilling fluid was proposed. According to the dimensions, hydraulic pressure consumption, internal structure and manufacturing of the robot, a three-stage eccentric circular flow channel structure is designed. A numerical simulation-unit experiment-numerical simulation method was proposed for the erosion analysis of drilling robot's three-stage eccentric circular flow channel. Firstly, a numerical model for the fluid-structure coupling erosion of drilling robot's three-stage eccentric circular flow channel was established, and the influence laws of particle size parameters and velocity parameters on the erosion rate were analyzed. Secondly, the experiment of drilling robot eccentric channel erosion was carried out to calibrate the numerical model of drilling robot three-stage eccentric circular channel fluid-structure coupling erosion. Based on this, the numerical simulation research of drilling robot three-stage eccentric circular flow channel is further carried out. The results show that the optimal inclination Angle of the three-stage eccentric circular flow channel is 5°. When the flow channel wall thickness is 5 mm, the eccentric flow channel life is more than 300 h, which meets the working life requirements of general downhole tools. The position of main erosion point and erosion pattern of flow passage are in good agreement with the experiment. This provides a theoretical basis for the structural design and engineering application of the drilling robot and is of great significance for promoting the popularization and application of coiled tubing drilling technology in extended-reach horizontal wells.

Key words: coiled tubing drilling, drilling robot, runner design, erosion, numerical simulation

中图分类号:

TE928

肖晓华, 代继樑, 朱海燕, 赵建国. 钻井机器人偏心流道冲蚀实验及数值模拟研究[J]. 西南石油大学学报(自然科学版), 2021, 43(2): 167-177.

XIAO Xiaohua, DAI Jiliang, ZHU Haiyan, ZHAO Jianguo. Experimental and Numerical Simulation Research on Eccentric Flow Channel Erosion of Drilling Robot[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(2): 167-177.

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钻井机器人偏心流道冲蚀实验及数值模拟研究

Experimental and Numerical Simulation Research on Eccentric Flow Channel Erosion of Drilling Robot

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