2) directional measure in the silo
井下定向测量
3) bottom hole orientation sub
井下定向接头
5) underground localization
井下定位
1.
Aiming at the problem that mobile node couldn t be located while the number of the reference nodes was less than 3 in underground localization and tracing system based on wireless sensor networks,an assistant localization algorithm of underground GIS was presented which was based on Zigbee.
针对无线传感器网络井下定位与跟踪系统中移动节点在参考节点数目小于3的情况下无法定位的问题,提出了基于Z igbee技术的井下GIS辅助定位算法,依据Z igbee网络的测量数据通过对GIS中图层、图元的操作来完成移动节点在信标节点不足情况下的定位跟踪和无信标节点情况下的区域估计。
6) directional well drilling
定向井钻井
1.
The common drilling assembly was introduced used in directional well drilling in the"straight-by-steady-down-stability"phase.
介绍了定向井钻井过程中"直-增-稳-降-稳"阶段常用的钻具组合,结合现场所用钻具,分析了各个阶段所用钻具的特点,并优选了钻具组合。
补充资料：白银有色金属公司深部铜矿主井和副井
白银有色金属公司深部铜矿主井和副井
白银有色金属公司深部铜矿主井和副井
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条