您要查找的是不是：
- Downhole Pipe String 井下管柱
- High-performance downhole sand pump and its accessory pipe string 高效井底抽砂泵及其配套管柱
- In addition, the instance of pipe string stress is suited, as a result of interlamination pressure difference i... 为层流注水工艺解决层间矛盾,调整油层平面上注水分布的均匀性提供了理论依据。
- Research and analysis have been made for buckling of long pipe string under gravity. 详细分析和研究了自重作用下竖直长管柱的屈曲问题。
- WBT point may be affirmed in terms of synthetical analyses of both changes of the liquid level in the pipe string and the card of pressur... 起出管柱后对环空的变化情况及压力计的压力卡片进行综合分析以确认窜通点。
- By using dual packer technique, separate-layer fracturing has been run smoothly, with matching instrument, pipe string design, sand ... 较好地解决了分层压裂技术,并在工具技术、管柱设计技术、压裂填砂技术、施工技术等方面进行了配套。
- Wire rope is linked to pipe string by attached guide sheave to well head so that it can finish quickly workover treatment.It can ... 高效修井作业车是将钢丝绳缠绕在滚筒上,通过安装在井口上的导轮,带动钢丝绳连接的管柱,进行快速修井作业。
- The buckling equation of pipe string in horizontal boreholes is a fourth non-linear ordinary differential equation with a small parameter. 管柱在水平井眼中的屈曲方程是一个含有小参数的四阶非线性常微分方程。
- Fictive force will be proved to be the liquid force under bending state of pipe string in the paper,and its characteristic will be analysed. 文中将证明“虚力”是管柱在弯曲状态下的流体作用力,并对其特点进行分析,以便为封隔器管柱受力分析计算奠定严密的科学基础。
- Abstract This paper introduces the structure,principle and field testing situation of the pipe string recently deve loped for chemical water plugging. 介绍了一种新近研制成功的化学堵水管柱的结构、原理、现场试验情况；
- It uses anchor claw spacing design to reach double functions: stabilizing pipe string and grappling pipe string and to raise sealing effect of packer. 采用锚爪限位设计，达到扶正管柱及锚定管柱的双作用，使封隔器密封效果大大提高。
- Mounting an accelerator on the jarring pipe string is an effective approach to improving the success rate of jarring releasing. 在震击管柱中配接使用加速器，是提高震击解卡成功率的有效途经。
- The procreative blanking plug of the "Y type" pipe string has check valve function and it can conveniently for reverse circulation well cleanup. 型管柱中的生产堵塞器具有单流阀作用,可方便进行反循环洗井;同时,具有独特外泄压系统,使堵塞器打捞在压力平衡状态下进行,且密封可靠,保证所取资料的准确性。
- This paper presents the analytical solutions for descr ibing the initia l and subsequent buckling of pipe string in crooked hole. 给出了描述弯曲井眼中管柱屈曲及后屈曲行为的解析结果。
- When profile control of partial slant hole is carried out, some problems appear frequently such as unsealed, pipe string creeping, the seal of packer can be checked and so on. 针对部分斜直井在调剖时,经常出现不密封、管柱蠕动和不能验封等问题,研制出一种防蠕动、密封性能好、可验封的新型斜直井调剖管柱。
- I need a piece of string to tie this parcel up. 我需要一根细绳把这包裹扎起来。
- This paper points out that due to the low production capacity, it is uneconomic to use the existing pump pipe string to produce oil from the low permeability reservoir. 通过研究表明,采用虹吸尾管结构管柱,可减少流体通过的压力损失,提高泵的吸入压力、入泵液速度及脉冲解堵等功能。
- The pipe string includes double hydraulic cylinder with anchorage packer、double hydraulic cylinder without anchorage packer、releasing tool、reversing valve and centralizer. 该工艺管柱主要由双缸液压锚定封隔器、双缸液压无锚定封隔器、液压丢手工具、换层开关、扶正器等工具组成。
- The most important problems are frequent seizing in fishing pressureout set,poor packer setting effect,and low pipe string sealing,resulting in high rework rate. 其中现场出现的最主要问题是生产过程中打捞憋压套发生卡阻几率高,以及封隔器坐封效果不好,管柱密封率低,造成高作业返工率。
- The flexural deformation equation is formulated for pipe string under vertical and horizontal bending condition based on vertical and horizontal bending beam theory. 运用纵横弯曲梁的理论，建立了管柱在纵横弯曲条件下的挠曲变形方程；
