螺杆驱动旋冲钻井工具设计及试验研究

The Design and Experimental Study of PDM Driven Rotary Percussion Drilling Tool

马广军 王甲昌 张海平

MA Guangjun WANG Jiachang ZHANG Haiping

中国石油大学(华东)石油工程学院, 山东青岛 266580; 中国石化石油工程技术研究院, 北京 100101

School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao, Shandong, 266580, China; Sinopec Research Institute of Petroleum Engineering, Beijing, 100101, China

为提高石油钻井破岩效率,将螺杆高速旋转与冲击器高频冲击相结合,设计了一种螺杆钻具驱动的新型机械式旋冲钻井工具。在设计旋冲钻井工具结构的基础上,建立了直井中单次冲击功、冲击频率等关键参数的计算模型,并进行了实例计算分析。计算结果表明,直井中单次冲击功仅是凸轮推程和钻压的函数,当钻柱结构确定且存在一定长度(大于500 m)的φ127.0 mm钻杆时,单次冲击功与钻压成正比关系,改变钻压可实时调整冲击功。工程样机测试表明,该工具结构设计合理,能够实现螺杆驱动钻头高速旋转和高频冲击,进一步提高工具的耐磨性能后具有良好的应用前景。

In order to improve the efficiency of rock-breaking in drilling operation, a new type of mechanical rotary percussion drilling tool driven by PDM has been designed, which combined high-speed PDM with high-frequency percussion device. On basis of structural design, a calculation model with single-time percussion power, percussion frequency and other key parameters has been established for vertical wells, and converted into a model calculation and analysis. Calculation results showed that single-time percussion power is only a function of cam stroke and WOB. When the drill string assembly is determined and has a certain length of greater than 500 m, and is composed of drill pipe with the size of φ127.0 mm, a single percussion power is positively proportional to the WOB, thus the percussion power can be adjusted by changing the WOB. The engineering prototype testing showed that the newly developed tools had a suitable structure, which can make high-speed rotation and high-frequency percussion to the bit that driven by the PDM, it has the potential to further improve its wear resistance.

国家科技重大专项"海相碳酸盐岩油气井井筒关键技术"(编号:2011ZX-05005-006)部分研究内容。

https://doi.org/10.11911/syztjs.201603009