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- annular pressure seals 环形密封
- Pressure Seal Swing and Tilting Disc Check Valves. 节能梭式止回阀。
- It can measure drilling engineering parameter,such as drilling pressure,torque,side pressure and annular pressure etc. 钻压、扭矩、侧向力、环空压力等钻井工程参数可以随钻进行测试。
- Inner row of studs establishes the initial seal of the pressure seal joint. 双头螺栓的内部排列组成压力密封连接的初始密封。
- Inner row of studs establish the initial seal of the pressure seal joint. 柱头螺栓的内部排列构成压力密封连接的初始密封。
- Downhole annular pressure is a key parameter.Conventional pressure loss calculation method is not applicable to a slin - hole. 井底环空压力是小井眼钻井的关键参数，通常的压力降计算方法对小井眼不适用。
- The pressure seal area can also be refinished with a simple honing tool. 压力密封区域也可以采用简单的镗磨工具进行表面整修。
- The paper introduces a new type slim - hole MWD tool, which is capable of accurately measuring downhole annular pressure and pressure effect caused by swabbing and waveness. 文章介绍一种新型小井眼随钻测井仪，它能够精确测量井底环空压力以及抽吸和波动引起的压力效应。
- Diplegs play an important role as pressure seals against the considerable back pressure generated. 料腿则起着对产生的相当大的背压加压密封作用。
- Based on the origins, the pressure seals include diagenetic seals, structural seals, capillary seals and filling seals. 成岩作用、构造作用、毛细管力作用、差异渗透作用和充填作用等是压力封闭层形成的主要机制。
- This paper presents a theoretical model for realistic annular pressure loss calculation in which the eccentricity is a function of the well depth and a simplified method for field calculations. 本文介绍偏心度为井深函数的实际环空中压降计算的理论模型和便于现场使用的简化计算方法。
- The effectiveness of pressure seals in the subsurface may be evaluated by making a calculated fluidpressure profile of the overlying shales. 在地下，压力封闭的有效性可以通过计算上层页岩的流体压力剖面来估计。
- In this paper, It talks about the application of having pressure seal technology in the LPC tank plain leakage. 本文所谈及正是此项技术在液化石油气储罐法兰泄漏时的实际应用。
- Our pressure seal fabricated yoke design allows for ease of adaptation for gear operators and actuation while reducing weight and increasing serviceability. 我们压力密封组装轭架结构使得配置齿轮操作机构和动力执行机构更加容易，是重量更轻，维修更容易。
- Coalbed methane reservoir is a pressure seal reservoir and its production characteristic is different from that of conventional natural gas. 煤层气是一种压力封闭型气藏,其生产特征不同于常规天然气。
- Live-loading automatically compensates for the transient loads which cause bonnet movement by maintaining a positive load on the pressure seal gasket as the pressure reduces. 动负载自动补偿波动转换中的变化,在压力减少时,阀帽会产生运动,维持压力密封垫圈上的正向负载。
- MATERIAL AND SERVICE ? Pressure Seal valves are available in a variety of body/bonnet materials and trims. Specified materials should be compatible with the service. 材料和应用?压力密封阀门具有宽广范围的阀体/阀帽材料和阀内件供用户选择。特殊的材料应该与应用场合相兼容。
- The annular markings on a tree indicate its age. 树的环形纹理显示其年龄。
- Pressure Seal ? uncomplicated design has segmented retaining ring and mild steel silver plated gasket to aid disassembly and provide maximum bonnet seal. 压力密封?结构简单，分段扣环，镀银低碳钢垫圈，有助于拆卸和最大限度的阀帽密封。
- The determination of trace silicon in high-purity barium titanate by GFAAS method is studied,in which the sample is dissolved in hydrofluoric acid with high pressure seal. 用石墨炉原子吸收光谱法研究钛酸钡中痕量硅的测定,在高纯钛酸钡新领域的研究及生产中都有重要的现实意义。
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- 农业及相关产业增加值 - the added value of agriculture and related industries
