1、

Three-dimensional bottomhole assembly model BHA directional behavior

三维井底钻具组合模式底部钻具组合定向特性

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2、

The study shows that the integrated method proposed considering bottomhole pressure change more properly reflects the dynamic reserves in pre-production phase.

由于提出的方法考虑了井底压力的变化,计算结果更能反映试采过程中的动储量。

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3、

influence of wellhead back pressure and gas injection rate on bottomhole pressure

井口回压和注气量对井底压力的影响

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4、

experimental study on the characteristics of fluid distribution at bottomhole of pdc bits

PDC钻头井底液流分布特性的实验研究

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5、

and the jet flow field of 4 nozzles of a pdc bit is tested by simulating the bottomhole flow field of the bit.

在模拟PDC钻头井底流场的条件下,对PDC钻头4个喷嘴的射流流场进行了测试。

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6、

by studying the shape of bottomhole pattern, the paper has mainly made an approach to the bottomhole pattern characteristics, presented a group of characteristic parameters, and obtained the close relation between these parameters and the type of rock bit by fuzzy cluster.

通过对井底模式形状的研究,对井底模式特征进行了探讨,提出了一组特征量,并用Fuzzy聚类方法分析得出特征量和钻头结构密切相关。

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7、

drawing and fuzzy cluster analysis of characteristic parameters of bottomhole pattern

井底模式特征量的提取与模糊聚类分析

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8、

calculating model of critical bottomhole pressure of sand production and its application

油井出砂临界井底流压计算模型及应用

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9、

development of a real-time bottomhole pressure acquisition transmission system

一种井底压力实时采集传输系统的研制

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10、

whole structural design of the diaphragm pressure converter used in bottomhole

分隔式井下增压器的整体结构设计

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11、

a study of characteristic bottomhole flow field of jet bit

喷射钻头井底流场特性的研究与应用

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12、

mechanism and parameter study of jet hydraulic drilling for decreasing bottomhole pressure

射流式水力降压钻井机理与参数研究

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13、

analysis of vibration property for drilling string and discussion on recognition method of bottomhole lithology

钻柱振动特性分析与井底岩性识别方法初探

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14、

a numerical study on cross flow characteristics of a jet impinging on the bottomhole

撞击射流井底漫流特性数值研究

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15、

numerical simulation of pressure characteristics of multi jets impinging on the bottomhole

多股受限撞击射流井底压力特征的数值模拟

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16、

the hydraulic design principle and field test of bottomhole differential pressure decreasing nipple are introduced.

提出了最新研制的井底降压差短节的设计原理,介绍了其水力参数设计和现场试验情况。

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17、

many calculating methods of bottomhole flowing pressure on multiphase vertical tube flow have been proposed.

半个多世纪以来,国内外学者已经提出了许多垂直管多相流井底流压的计算方法。

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18、

nonlinear dynamic analysis for bottomhole assembly

下部钻具组合的几何非线性动态特性分析

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19、

relation between bottomhole pattern and hit structure

井底模式与钻头结构关系

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20、

three-dimensional differential equations for bottomhole assembly under large deflection

下部钻具组合三维大挠度微分方程的详细推导

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