您要查找的是不是：
- Keywords horizontal drilling whipstock drill stem motion; 水平钻井;转向器;钻柱;运动;
- horizontal drill stem 水平钻柱
- Analysis of friction on drill string in horizontal drilling. 水平井管柱下入摩阻分析及应用。
- 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。
- 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。
- 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。
- The calculation of critical compressive force of drill stem in horizontal well 水平井眼中受压钻柱的临界载荷计算
- The contact between drillstring and bore hole wall in the process of horizontal drilling is of large area and geometrically nonlinear. 长中半径水平井钻柱与井壁的接触问题是大面积接触的几何非线性问题。
- 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。
- Most downhole power drills for horizontal drilling are constituted basically by positive displacement drills. 绝大多数的水平井井下动力钻具是以螺杆钻具为基础构成的。
- Based on the analysis of woodworking drilling process,the design plan of a horizontal drilling machine is determined. 通过对木材钻孔工艺的分析,确定卧式木工钻孔机的设计方案。
- 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。
- The technology of sidetrack horizontal drilling is a new type of oilfield development technology. 侧钻水平井技术是一项新型的油田开发技术，但是，侧钻水平井能否获得好的效益，关键是井位筛选。
- 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。
- And it is used successfully in shield tunneling, horizontal drilling, deep drilling, slotted walls and bore piles construction projects. 主要应用于盾构隧道挖掘，水平钻孔，深层钻孔，开凿围墙和钻桩的建筑项目。
- In order to raise integral development efficiency,the horizontal drilling techniques have been applied in Sulige region of Changqing Gas Field. 为提高整体开发效率,在长庆气田苏里格区块应用了水平井钻井技术。
- Advances in horizontal drilling and the hydraulic fracturing of rock have made it possible to get previously inaccessible gas out. 但水平钻井的发展以及水力压裂岩石可以获得以前不可能开采的该类天然气。
