| 射流泵系统在非开挖HDD中的应用研究 |
| 投稿时间：2018-07-18 修订日期：2018-07-18 点此下载全文 |
| 引用本文：朱俊毅,孙平贺,曹函,等.射流泵系统在非开挖HDD中的应用研究[J].钻探工程,2018,45(10):11-15.ZHU Jun-yi,SUN Ping-he,CAO Han,et al. Field Study on Jet Pump System in Horizontal Directional Drilling[J]. Drilling Engineering, 2018,45(10):11-15. |
| 摘要点击次数: 757 |
| 全文下载次数: 653 |
|
| 基金项目:国家自然科学基金项目“细观和宏观下离子稳定剂对煤层气钻孔的化学与力学护壁机理研究”（编号：41602372）；国土资源部复杂条件钻采技术重点实验室开放基金项目“煤层气储层保护离子固结钻井液技术研究”（编号：DET201612）；“油气藏地质及开发工程”国家重点实验室（西南石油大学）资助项目“湘中页岩气孔内原位探测及钻井液关键技术研究”（编号：PLN201609）；国家留学基金访问学者项目“智能钻进与非开挖水平定向钻进关键系统集成”（编号：201706375018） |
|
| 中文摘要:非开挖HDD技术被广泛应用于给排水、电力、通信、油气等领域的新管道敷设和既有管线修复中。当在浅部地层以及上覆地层应力较小的区域进行HDD施工时，易出现“溢浆”现象。本文结合国内外“溢浆”防控技术研究现状，对德国某公司的孔内新型射流泵系统在非开挖工程中的应用进行了论述。该系统利用在近钻头位置安装的高压射流泵系统收集前端钻头扩孔后形成的钻屑，从而减少钻孔环状空间的钻屑含量。系统主要由钻屑收集装置、射流泵体和连接装置3部分组成，可实现98%左右孔内钻屑的清理。根据工程需要，可采用清孔、软土扩(清)孔、组合以及管道回拉等4种模式进行工程作业。工程实践表明，采用该系统后单日最长掘进长度达到122 m。同时提出了存在的问题：由于小直径复杂地层钻进中易出现钻屑团积，从而对筛格产生堵塞。在管道回拉模式中，如何改变钻屑返排的回路等问题仍是该系统在应用中亟待解决的关键问题。 |
| 中文关键词:水平定向钻进 非开挖 溢浆 射流技术 孔壁稳定 |
| |
| Field Study on Jet Pump System in Horizontal Directional Drilling |
|
|
| Abstract:As one method of Trenchless, HDD technology is widely used in new pipeline laying and existing pipeline repair in the fields of water supply and drainage, electric power, communications, oil and gas. The phenomenon of “overflow” is easy to occur when the HDD construction is carried out in the shallow stratum and the area where the stress of the overburden is small. This paper which combines the research status of "overflow" prevention and control technology domestic and foreign areas discusses the application of a new in-hole jet pump system design by a German company in trenchless engineering. The system sets a high-pressure jet pump system installed near the drill bit to collect cuttings formed during reaming process, thereby reducing the number of cuttings in the borehole space. The system is mainly composed of drill cuttings collection device, jet pump and connecting device, which can clean up about 98% of cuttings in the borehole. According to the needs of the project, four modes, such as borehole clearing, soft ground reaming & cleaning, combination and pipe pullback, can be used for pipeline laying. Field practice indicates that the longest drilling length can reach 122m per day associated with the system. At the same time, the existing problem is present in this paper. The screen will be blocked due to the formation of cuttings aggregation in complex formations with small diameter drilling. For the pipe pullback mode, how to change the return loop of cuttings is still the key problem to be solved in the jobsite. |
| keywords:horizontal directional drilling trenchless drilling fluid overflow jet technology borehole stability |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
