自进式旋转射流钻头破岩效果

doi:10.7623/syxb201605012

石油学报 ›› 2016, Vol. 37 ›› Issue (5): 680-687.DOI: 10.7623/syxb201605012

自进式旋转射流钻头破岩效果

毕刚¹, 李根生², 屈展¹, 牛继磊², 黄中伟², 席仲琛³, 窦亮彬¹

1. 西安石油大学石油工程学院陕西西安 710065;
2. 中国石油大学油气资源与探测国家重点实验室北京 102249;
3. 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司陕西西安 710021

收稿日期:2015-11-22 修回日期:2016-03-01 出版日期:2016-05-25 发布日期:2016-06-06
通讯作者: 毕刚,男,1984年11月生,2008年获中国石油大学(北京)学士学位,2014年获中国石油大学(北京)博士学位,现为西安石油大学石油工程学院讲师,主要从事微小井眼径向水平井钻井及井壁稳定相关技术研究。Email:8bigang@163.com
作者简介:毕刚,男,1984年11月生,2008年获中国石油大学(北京)学士学位,2014年获中国石油大学(北京)博士学位,现为西安石油大学石油工程学院讲师,主要从事微小井眼径向水平井钻井及井壁稳定相关技术研究。Email:8bigang@163.com
基金资助:
国家重大科技专项"煤层气水平井;多分支水平井钻井技术研究"(2011ZX05036-002);国家自然科学基金项目"力学与化学耦合下泥页岩井壁蠕变损伤失稳研究"(No.51174162)和陕西省自然科学基础研究计划"超临界CO₂微小井眼径向水平井开发煤层气机理研究"(2015JQ5147)资助。

Rock breaking efficiency of the self-propelled swirling jet bit

Bi Gang¹, Li Gensheng², Qu Zhan¹, Niu Jilei², Huang Zhongwei², Xi Zhongchen³, Dou Liangbin¹

1. School of Petroleum Engineering, Xi'an Shiyou University, Shaanxi Xi'an 710065, China;
2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
3. Changqing Downhole Technology Company, CNPC Chuanqing Drilling Engineering Company Limited, Shaanxi Xi'an 710021, China

Received:2015-11-22 Revised:2016-03-01 Online:2016-05-25 Published:2016-06-06

摘要/Abstract

摘要：

利用有限的排量实现高效的破岩效率并尽可能增大径向水平井眼的延伸能力是实施新型径向水平井技术的关键,射流钻头的性能是该关键技术要解决的首要问题。在多孔射流钻头的基础上,设计研制了自进式旋转射流钻头,分析了其工作原理,并通过试验对自进式单孔旋转射流钻头、自进式单孔直旋混合射流钻头、自进式多孔旋转射流钻头以及自进式多孔直旋混合射流钻头随时间、射流压力和喷距的破岩钻孔规律进行了研究。研究结果表明:当喷距范围为9~12 mm、射流压力为20~35 MPa时,在相同的射流压力和喷距条件下,自进式多孔直旋混合射流钻头的破岩效果优于自进式多孔旋转射流钻头,其中1+4孔的多孔直旋混合射流钻头的破岩效果最好。设计得到的新型射流钻头可以提高径向水平井的钻进速度。

关键词: 旋转射流, 直旋混合射流, 单孔射流, 多孔射流, 破岩效果

Abstract:

To achieve high rock breaking efficiency using the limited discharge rate and increase the extension capacity of radial horizontal wellbore is a key to perform new radial horizontal well technology. The performance of jet bit is the primary problem solved by this key technology. Based on the multi-jet bit, the authors developed a self-propelled swirling jet bit, and analyzed its working principle. Based on experiments, a study was conducted on the rock breaking and drilling laws of jet bits with the changes in time, jet pressure and standoff distance, including self-propelled swirling single-hole jet bit, self-propelled straight-swirling single-hole jet bit, self-propelled swirling multi-hole jet bit and self-propelled straight-swirling multi-hole jet bit. The results indicate that when standoff distance is 9-12 mm and jet pressure is 20-35 MPa, and under the same conditions of standoff distance and jet pressure, the rock breaking efficiency of self-propelled straight-swirling multi-hole jet bit is better than that of self-propelled swirling multi-hole jet bit, and that of self-propelled straight-swirling multi-hole jet bit (1+4 holes) was optimal. The designed new jet bit is able to improve the drilling rate of radial horizontal well.

Key words: swirling jet, straight-swirling jet, single jet, multi-jet, rock breaking efficiency

中图分类号:

TE246

毕刚, 李根生, 屈展, 牛继磊, 黄中伟, 席仲琛, 窦亮彬. 自进式旋转射流钻头破岩效果[J]. 石油学报, 2016, 37(5): 680-687.

Bi Gang, Li Gensheng, Qu Zhan, Niu Jilei, Huang Zhongwei, Xi Zhongchen, Dou Liangbin. Rock breaking efficiency of the self-propelled swirling jet bit[J]. Acta Petrolei Sinica, 2016, 37(5): 680-687.

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自进式旋转射流钻头破岩效果

Rock breaking efficiency of the self-propelled swirling jet bit

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