... bottom hole packer井底封隔器 bottom hole pattern井底形状 bottom hole plug packer塞式井底封隔器 ...
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The bottom hole pattern of a well is the aggregation of the pits on the bottom rock cut by the bit teeth in the course of drilling.
井底模式就是钻头在钻凿岩石的过程中，钻头牙齿在井底岩石上打出凹坑的集合。
The formation of the bottom hole rock-disintegrating track of the mono-cone bit with wedge teeth was studied, and simulation software for the track pattern was developed.
在此基础上以楔形齿为对象研究了偏心单牙轮钻头井底破岩轨迹的形成，并编制了井底轨迹图仿真软件以模拟牙齿的凿岩轨迹。
The critical buckling load is influenced by the pattern of bottom-hole assembly directly.
下部钻具组合的具体方式将直接影响其所能承受临界失稳载荷的大小。
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