| 旋流喷嘴钻头在NP32-3646井的现场应用分析 |
| 投稿时间：2014-07-21 修订日期：2014-07-21 点此下载全文 |
| 引用本文：董超,谭松成,吴华,等.旋流喷嘴钻头在NP32-3646井的现场应用分析[J].钻探工程,2014,41(12):31-33,36.DONG Chao,TAN Song-cheng,WU Hua,et al. Analysis on Field Application of Swirl Nozzle Bit Employed for NP32-3646 Well Drilling[J]. Drilling Engineering, 2014,41(12):31-33,36. |
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| 基金项目:中国石油集团公司“高效破岩工具”项目的子课题——“高效PDC与孕镶式金刚石钻头研制”课题的研究内容（2013E-38-04） |
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| 中文摘要:南堡32-3646井是一口四开三段制定向井，设计井深5798 m。3864～4265 m（井斜29.18°的稳斜段）试验了五刀翼旋流喷嘴PDC钻头（主切削齿直径16 mm， 3个φ11 mm常规水眼和4个φ18 mm旋流喷射水眼）。针对深井超深井钻进中常采用的相对较高的钻井液密度和粘度，不利于提高钻头破岩效率的问题，在系统介绍旋转射流发生机理和破岩机理的基础上，对NP32-3646井五刀翼旋流喷嘴PDC钻头现场应用情况进行了分析。试验结果表明，旋转射流因具有切向、轴向和径向三维速度，可在高粘钻井液条件下更好地改善井底清岩效果，并通过剪切、冲蚀、拉伸和磨削等多种方式实现辅助破岩，从而提高钻井效率。试验钻头进尺401 m，平均机械钻速4.45 m/h，可较好地满足现场钻进需要，具有良好的推广应用前景。 |
| 中文关键词:旋转射流 PDC钻头 深井超深井 破岩机理 冀东油田 |
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| Analysis on Field Application of Swirl Nozzle Bit Employed for NP32-3646 Well Drilling |
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| Abstract:NP32-3646 is a three-interval and four-spud directional well with designed depth of 5798m. The swirl nozzle PDC bit was tested in the section of 3864m to 4265m (well deviation angle of 29.18 ), which had 5 drag blades with diameter of 16mm for its main cutters and 7 nozzles (3 ordinary ones and 4 swirl ones with 11mm and 18mm in diameter respectively). In deep and extra-deep well drilling, higher mud density and viscosity are usually employed, which is against to improve bit drilling efficiency. To address this issue, based on the produce mechanism and rock-breaking mechanism of swirling jet flow, the analysis is made on the field application of swirl nozzle PDC bit with 5 drag blades in well NP32-3646. The field application indicates that duo to its three-dimensional velocity of tangential, axial and radial, swirling jet flow can improve the cuttings removal performance at well bottom and rock-breaking can be realized by shear, erosion, stretching and grinding so as to improve drilling efficiency. The swirl nozzle bit obtained a total footage of 401m with average rate of penetration of 4.45m/h, which can meet the needs of field drilling and has good popularization and application prospect. |
| keywords:swirling jet flow PDC bit deep and extra-deep well rock-breaking mechanism Jidong oilfield |
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