| 低温电铸孕镶脉冲钻头及其水力性能数值模拟 |
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| 引用本文： | 李大佛,龙新平,李天明,陈洪俊,雷艳,刘红旗,许少宁,杨雪龙.低温电铸孕镶脉冲钻头及其水力性能数值模拟[J].地球科学,2012,37(3):598-604. |
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| 作者姓名： | 李大佛 龙新平 李天明 陈洪俊 雷艳 刘红旗 许少宁 杨雪龙 |
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| 作者单位： | 1.中国地质大学长江钻头有限公司, 湖北武汉 430074 |
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| 基金项目： | 中国石油化工集团2010年科研项目SG10028 |
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| 摘 要： | 对于特别坚硬、研磨性强、互层频繁、含有石英和砾石夹层的地层, PDC钻头无法钻进, 机械钻速较低, 且破坏形式磨损快, 复合片容易破裂, 因此寿命很低.而牙轮钻头钻进也因为该类地层坚硬等缘故, 钻进效率很低, 并容易造成孔内掉牙轮等事故出现.针对这种问题, 研制了一种低温电铸孕镶脉冲石油钻头, 对钻头的流场进行了数值模拟.该钻头在现场的应用表明, 它具有寿命长、机械钻速高的特点.
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| 关 键 词： | 孕镶钻头 射流 脉冲 数值模拟 |
| 收稿时间： | 2011-12-03 |
Pulsing Impregnated Bits with Low-Temperature Electroplating and Numerical Simulation for Bit Hydraulic Performance |
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| Abstract: | For the strata with features of extreme hardness, strong abrasiveness, high frequency of interbedding, with quartz and gravel interlayer, PDC bit is barely to be employed as a result of low ROP and service life, embodied as fast wear of working layer, easily breaking of diamond compact, etc. The roller bit is not suit for this kind of strata either, and drilling accident might be caused by losing teeth. To solve this problem, the pulsing impregnated petroleum bit with low-temperature electroplating is developed, and numerical simulation is employed for the hydraulic performance of bit flow field. Field applications show that this kind of new bit enjoys the advantage of long service life and high ROP. |
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