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- drill stem failure 钻柱损坏
- Supporting vector machine technology for drilling stem failure in oil drilling engineering 石油钻井中钻具失效的支持向量机技术
- The traditional DST (Drill Stem Test) is long in operation time, high in cost and easy of polluting environments. 传统的DST钻杆测试作业时间长、测试费用高、易造成环境污染。
- A series of simulating tests of movement of drill stem in a vertical wellbore was conducted on a testing rack. 在自行设计建立的钻柱模拟实验来上做了直井中钻柱运动状态模拟试验，并用计算机采集和处理数据。
- FAILURE CAUSE AND PREVENTIVE MEASURES OF DRILL STEM 钻柱失效原因及预防措施
- Calculating results show that fluctuation pressure decrease with eccentricity between drill stem and well bore increase. 计算结果表明：随钻柱与井眼间偏心度增大，波动压力减小。 全偏心情况下的波动压力大约只有同心情况下的一半。
- Such motion produces what I call a" pry bar" effect on your long stem resulting in premature heaadset and folding stem failure. 这是我们称之为“撬杆”的动作，它作用于你的头管后，将会使你的把杆过早损坏或折叠竖管发生故障。
- Such motion produces what I call a "pry bar " effect on your long stem resulting in premature heaadset and folding stem failure. 这是我们称之为“撬杆”的动作，它作用于你的头管后，将会使你的把杆过早损坏或折叠竖管发生故障。
- DST (Drill Stem Test), a fast test for show of oil and gas while drilling. DST (Drill-Stem-Test),即中途测试,是指油井在钻井过程中,对有油气显示的地层进行快速测试。
- The working mechanism of turbulent sensor waE described and turbulent sensors used for measurement of movement state of lower portion of drill stem were designed and made. 介绍了涡流式传感器的工作原理，并设计制作了测试下部钻柱运动状态的涡流传感器。
- Pick up drill stem test tool. 提起钻杆测试工具。
- Field operation shows that, by using the hydrodynamic propulsor, not only the penetration rate is increased, the vibration of the bit and drill stem is reduced as well, thereby the service life of the bit is extended. 1995-1998年井下液力推进器在大港油田等地区不同区块20余口井上施工的实践证明，使用这种推进器不但可以提高机械钻速，而且减轻了钻头和钻杆的振动，进而延长了钻头寿命。
- Owing to its unique design feature, this drillstem vibration absorber sereves the function of buffering or eliminating both the longitudinal and the twisting vibration of a drill stem. 双作用钻具减振器由于其独特的结构而具有减缓或消除钻具纵向振动和扭转振动的双重功能。
- Failure analysis of drill stem bracket on rotating drill machine 旋挖钻机钻杆托架失效分析
- Drill stem tests are taken from some wells almost immediately after drilling and completion operations. 有些井刚钻完并进行完井作业后，就立即采取钻杆测试。
- He tried to put a bold face on his failure. 他对自己的失败装出一副满不在乎的样子。
- The cake we made was somewhat of a failure. 我们做的蛋糕不大成功。
- The reversing sub is also called reversing spear which is a special tool for revering stuck drill stem above stuck point in drilling and work over operation. 倒扣接头也叫倒扣矛，是指在钻井、修井过程中倒出卡点以上被卡钻柱的专用工具。
- Specification for Rotary Drill Stem Elements 旋转钻柱规范
- Keywords drill stem;antenna;telemetering; 钻杆;天线;遥测;
