| 磨损齿PDC钻头的切削性能试验 |
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| 引用本文： | 张春亮,王锦成,柯晓华,冯枭,杨迎新,任海涛,黄子轩. 磨损齿PDC钻头的切削性能试验[J]. 金刚石与磨料磨具工程, 2023, 43(1): 35-42. DOI: 10.13394/j.cnki.jgszz.2022.0084 |
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| 作者姓名： | 张春亮 王锦成 柯晓华 冯枭 杨迎新 任海涛 黄子轩 |
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| 作者单位： | 1.西南石油大学 机电工程学院, 成都 6105002.油气钻完井技术国家工程研究中心, 北京 1022063.中国地质大学（北京）, 北京 1000834.中国石油集团工程技术研究院有限公司, 北京 102206 |
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| 基金项目： | 国家自然科学基金（51374176）；四川省科技厅科技计划（23QYCX0251）。 |
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| 摘 要： | 为探究磨损齿PDC钻头的切削性能，避免其过早失效，通过单齿切削试验以及全尺寸磨损齿钻头钻进试验，分析磨损齿的受力状态以及钻头的钻进特性。结果表明：相比于新齿，磨损齿受载更大，且其“磨圆”后切岩过程中的钝搓现象普遍存在；在相同吃深条件下，齿的磨损高度越大，载荷波动越明显。相比于新钻头，磨损齿钻头更能产生光滑的井底，不利于其侵入地层。随齿的磨损高度增加，钻头的机械钻速下降，机械比能增加，振动程度减小，且钻头的径向加速值与齿的磨损高度无关。当齿的磨损高度大于3.0 mm时，钻头的机械比能和机械钻速对钻压不敏感。
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| 关 键 词： | 切削载荷 单齿切削 钻进特性 机械比能 机械钻速 |
| 收稿时间： | 2022-06-06 |
Experimental study on working mechanics of PDC bit with worn teeth |
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| ZHANG Chunliang,WANG Jincheng,KE Xiaohua,FENG Xiao,YANG Yingxin,REN Haitao,HUANG Zixuan. Experimental study on working mechanics of PDC bit with worn teeth[J]. Diamond & Abrasives Engineering, 2023, 43(1): 35-42. DOI: 10.13394/j.cnki.jgszz.2022.0084 |
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| Authors: | ZHANG Chunliang WANG Jincheng KE Xiaohua FENG Xiao YANG Yingxin REN Haitao HUANG Zixuan |
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| Affiliation: | 1.College of Mechanical Engineering, Southwest Petroleum University, Chengdu 610500, China2.National Engineering Research Center for oil & gas drilling and completion technology, Beijing 102206, China3.China University of Geosciences(Beijing), Beijing 100083, China4.CNPC Engineering Technology R & D Company Limited, Beijing 102206, China |
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| Abstract: | PDC bits have been working in a worn state for a long time. To explore its cutting performance and avoid premature failure of the bit, this paper analyzes the load on the worn teeth and the drilling characteristics of the bit through single tooth cutting experiment and full-scale wear bit drilling experiment. The result shows that the worn teeth bear larger load compared with the new teeth, and the phenomenon of blunt rubbing is common in the process of rock cutting after the cutting teeth are “rounded”. Under the same depth, the greater the wear height is, the more obvious the load fluctuation appears. Through the full-scale bit drilling experiment, it is found that compared with the new bit, the worn bit can produce a smoother bottom hole, which is not beneficial for PDC bits' teeth intruding into the rock. With the increase of wear degree, the mechanical rate of penetration decreases and the mechanical specific energy increases. When the wear is greater than 3 mm, the mechanical specific energy and mechanical rate of penetration are not sensitive to weight on bit. With the increase of wear degree, the vibration degree of the bit decreases, and there is little difference in the radial acceleration value of the bit regardless of the wear degree. |
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