天然气工业2018，Vol.38Issue(5)：87-93,7.DOI:10.3787/j.issn.1000-0976.2018.05.010
脉冲射流式液动冲击工具的研制及现场应用
Development and field application of a pulse–jet hydraulic impactor
摘要
Abstract
The current studies on hydraulic pulse jet mainly focus on the pulse jet flow field and its effect, but have never extended to the collaboration of hydraulic impact and pulse jet for rock breaking. In this paper, both hydraulic impact and pulse jet were combined effectively to develop a pulse–jet hydraulic impactor for drilling after analyzing the working principles and realization conditions. The rock breaking capacity of this tool was verified through laboratory experiments and field tests. The following results were obtained. First, the tool can run when the mass of the impactor body is less than 60 kg. Second, the rock breaking capacity of the drilling assembly under the synergistic action of hydraulic impact and pulse jet is obviously better than that of other drilling tools, and the tool is much more efficient than other tools in ROP enhancement. Third, the impact effect is dependent on the mass and impact frequency of the impactor and the impactor with the mass of 30 kg is better in impact effect. Fourth, the larger the impulse jet, the higher its rock breaking capacity is. The pulse jet can be increased by reducing the diameter of the tool's nozzle. Fifth, hydraulic impact can help accelerate the breaking of high-hardness rocks, and the breaking of less-cemented rocks can be greatly enhanced by increasing the pulse jet. Field application results show that the ROP of the drilling tool based on the collaboration of hydraulic impact and pulse jet is 2.52 m/h, which is 72.5％ higher than that of conventional drilling assemblies. It is concluded that this developed pulse–jet hydraulic impactor provides a new idea to solve the problems in deep wells and horizontal wells, such as low drilling speed, obvious chip hold down effect and difficult cuttings removal.关键词
液动冲击/脉冲射流/协同破岩/钻井工具/实验室试验/现场实验/破岩能力/钻井提速Key words
Hydraulic impact/Pulse jet/Collaborative rock breaking/Drilling tool/Laboratory experiment/Field test/Rock breaking capacity/ROP enhancement引用本文复制引用
李玮,李世昌,闫立鹏,秦东,孙士慧,赵欢..脉冲射流式液动冲击工具的研制及现场应用[J].天然气工业,2018,38(5):87-93,7.基金项目
国家科技重大专项子课题"高频低幅扭转冲击器及配套工艺技术" (编号:2016ZX05020-002) （编号:2016ZX05020-002）
国家科技重大专项"钻井工程一体化软件" (编号:2016ZX05020-006). （编号:2016ZX05020-006）
