连续管多孔喷嘴射流工具研制与清洗参数优化

Development of Coiled Tubing Jet Tools with Multi-Hole Nozzles and Cleaning Parameter Optimization

赵金 赵星 蔡鹏 彭齐 饶嘉骐

ZHAO Jin ZHAO Xing CAI Peng PENG Qi RAO Jiaqi

长江大学机械工程学院, 湖北荆州 434023 成都北方石油勘探开发技术有限公司, 四川成都 610501 中海油安全技术服务有限公司湛江分公司, 广东湛江 524057 中国石油集团工程技术研究院有限公司, 北京 102206 中国石油玉门油田分公司环庆采油厂, 甘肃庆阳 735019

School of Mechanical Engineering, Yangtze University, Jingzhou, Hubei, 434023, China Chengdu North Petroleum Exploration and Development Technology Co. Ltd., Chengdu, Sichuan, 610501, China Zhanjiang Branch of CNOOC Safety & Technology Services Co. Ltd., Zhanjiang, Guangdong, 524057, China CNPC Engineering Technology R&D Company Limited, Beijing, 102206, China Huanqing Oil Production Plant, PetroChina Yumen Oilfield Company, Qingyang, Gansu, 735019, China

连续管尺寸与喷嘴射流参数、泵车参数不匹配导致清洗效果较差，针对该问题，模拟了连续管、喷嘴组合及泵车水力参数的匹配关系，通过试验分析了射流速度、喷嘴直径、喷嘴数量、移动速度和除垢剂对油管清洗效果的影响，基于分析结果研制了新型多孔喷射清洗工具，并进行了清洗参数优化。研究表明，在管柱安全和管内空间允许的条件下，选择大尺寸连续管，可降低管内摩阻和提高流体返出速度；针对井深不超过 3 000 m 的井 ϕ73.0 mm 油管除垢，选用ϕ50.8 mm连续管，柱塞直径114.3 mm、泵冲90 min−1、功率580 kW的泵车，可获得最优施工排量。针对七个泉油田油管除垢，采用清水+5%盐酸+1%除垢剂，射流除垢工具安装 5个ϕ3.5 mm喷嘴，施工排量550～600 L/min，移动速度为5 m/min时，除垢效果较好。连续管射流除垢技术具有安全、环保、无污染等特点，应用前景广阔。

To solve the problem of poor cleaning effects caused by incorrect matching of coiled tubing (CT) sizes with nozzle jet parameters and pumper parameters, the influences of jet velocities, nozzle diameters, number of nozzles, movement velocities, and scale removers on tubing cleaning effects were studied through laboratory experiments by simulating the matching relationship among CTs, nozzle combinations, and hydraulic parameters of pumpers. Based on the analysis results, a new type of multi-hole jet cleaning tool was designed, and the parameters of which were optimized. The research shows that under the condition that the string is safe, and the space in the tubing is large, the CT with a large size can be selected to reduce the friction in the tubing and increase the flow return velocity. For the scale removing of ϕ73 mm tubing with the well depth of less than 3000 m, the optimal construction displacement can be obtained by selecting a ϕ50.8 mm CT,a pumper plunger diameter of 114.3 mm, a pump speed of 90 min−1, and a power of 580 kW. For the scale removing of tubing in Qigequan Oilfield, clean water was mixed with hydrochloric acid of 5% and a scale remover of 1%, the jet scale removing tool was equipped with five ϕ3.5 mm nozzles. In that case, the construction displacement is 550–600 L/min, and the movement velocity is 5 m/min. The results shows a good scale removing effect. CT jet scale removing technology is safe, environmentally friendly, and pollution-free, it has a great prospect for broad application.

国家自然科学基金项目“多物理场流固耦合支撑剂动态架桥缝网时空演化规律研究”(编号：52204025) 资助

https://doi.org/10.11911/syztjs.2023061