An experimental study on PDC bits' cutter parameters and formation adaptability

被引：2
|
作者：
Zou D. [1 ]
Xu C. [1 ]
Yi Y. [1 ]
Chen X. [2 ]
Yu J. [1 ]
机构：
[1] College of Petroleum Engineering, China University of Petroleum <East China>, Qingdao, 266580, Shandong
[2] Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla, 841000, Xinjiang
来源：
Xu, Chengkai (xchkai@163.com) | 2017年 / Natural Gas Industry Journal Agency卷 / 37期
关键词：
Back rake; Bench test; Cutter density; Cutter size; Formation adaptability; PDC bit; Rock breaking efficiency; Rock drillability;
D O I：
10.3787/j.issn.1000-0976.2017.09.011
中图分类号：
学科分类号：
摘要：
If a PDC bit is selected or designed rationally according to the formation properties, its drilling efficiency can be improved significantly. For providing reference for a rational selection and personalized design of PDC bits, 21 test bits were selected to perform the drilling test on six rock samples in different types and with different drillability grades. Then, the optimal values of cutter sizes, back rakes and cutter densities for different rock drillability grades were analyzed. It is shown that when the drillability grade is less than III, the drilling efficiency increases with the i ncrease of the cut ter sizes. Otherwise, the rock breaking ef ficiency is the highest when the cutter size is 16 mm; that the critical point of rock drillability grade at which the effect law of cutter size on the rock breaking efficiency changes is 3.11; that as for the rocks with different drillability grades, the rock breaking efficiency decreases linearly with the increase of back rakes. However, the higher the rock drillability grade is, the less the effect of back rake on the rock breaking efficiency is; and that with the increase of cutter density, the rock breaking efficiency is reduced by the power function. These research results provide a basis for the rational selection of PDC bits according to rock drillability g rades. © 2017, Natural Gas Industry Journal Agency. All right reserved.
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页码：85 / 90
页数：5
相关论文
共 25 条
  • [1] Mensa-Wilmot G., Soza R., Hudson K., Advanced cutting structure improves PDC bit performance in hard rock drilling environments, SPE Annual Technical Conference and Exhibition, (2003)
  • [2] Scott D.E., Isbell M.R., Innovative PDC cutter technology leads to step out performance improvements in diverse applications in shale plays, IADC/SPE Drilling Conference and Exhibition, (2012)
  • [3] Xu Z., Cai J., New approach to experimental studies of forces on PDC bit cutters, Journal of the University of Petroleum, China (Edition of Natural Science), 18, 4, pp. 31-36, (1994)
  • [4] Zou D., Wang R., Lateral force balancing design of blade PDC bits, Journal of the University of Petroleum, China (Edition of Natural Science), 29, 2, pp. 42-44, (2005)
  • [5] Ma Q., Wang R., Experimental study on force of PDC cutter breaking rock, Journal of China University of Petroleum (Edition of Natural Science), 30, 2, pp. 45-47, (2006)
  • [6] Zou D., Sun Y., Yu P., Hou X., Yang S., Experiment study on bench test of stinger PDC bit, Journal of China University of Petroleum (Edition of Natural Science), 39, 2, pp. 48-52, (2015)
  • [7] Chen S., Arfele R., Anderle S., Romero J., A new theory on cutter layout for improving PDC-bit performance in hard-and transit-formation drilling, SPE Drilling & Completion, 28, 4, pp. 338-349, (2013)
  • [8] Wang J., Zou D., Yang G., He R., Chen X., Interaction model of PDC cutter and rock, Journal of China University of Petroleum (Edition of Natural Science), 38, 4, pp. 104-109, (2014)
  • [9] Liu J., Computer-aided placement of tooth for PDC bit, Progress in Exploration Geophysics, 26, 3, pp. 225-227, (2003)
  • [10] Hareland G., Nygaard R., Yan W., Wise J.L., Cutting efficiency of a single PDC cutter on hard rock, Journal of Canadian Petroleum Technology, 48, 6, pp. 60-65, (2009)
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