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- XM-230/80 rotary seal head is a rotary seal unit on wellhead, specialized for negative pressure and low pressure drilling, characterized by reliable sealing effect, ease of opration and safe service. XM-230/80型钻井旋转密封头是一种专用于负压、低压钻井的井口旋转密封装置,具有密封可靠、操作简单和防爆、安全等优点。
- Negative pressure drilling 负压钻进
- The negative pressure loop should be noted. 应该注意到负压的腹点。
- This negative pressure phase is of short duration. 负压周期的延续时间很短。
- The Gating Design for Negative Pressure EPC. 负压消失模铸造原料磨衬板的浇注工艺设计
- Intrapleural pressure is usually negative pressure. 胸膜腔内压通常为负压。
- Distinct variations of managed pressure drilling exhibit application potential. 控制钻井压力的不同变化可解决钻井中存在的压力问题。
- The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus. 井底负压值控制是欠平衡钻井技术的基础,而井底负压值的大小与环空多相流的有关压力计算有关。
- Operated at sealed negative pressure and designed by GMP. 密封负压操作，按gmp规范设计。
- The gas underbalance pressure drilling test for protecting reservoir was carried out in two holes. 开展了2口保护储层的天然气欠平衡钻井试验。
- Using negative pressure air pipe to ventilate for the being constructed tunnel. 使用负压风管对在建隧道进行通风换气。
- Negative pressure aspirator is necessary to every clinical sections. 负压吸引器是各个临床科室所必备的医疗设备。
- In light of the geological features of reservoirs in Changqing Gas Field, the study and test of gas underbalance pressure drilling technology have been carried out in the field. 摘要针对长庆气田储层地质特征，开展了长庆气田天然气欠平衡钻井技术研究及试验。
- This paper compared several testing methods of carburized depth of high air pressure drill and evaluafed their accurately and practicality. 比较了高风压钻头渗碳层深度的不同检验方法,并对其正确性和实用性进行了探讨。
- A vacuum pump creates negative pressure for correct operation of the filtrate recovery system. 真空泵产生的负压是保证滤液回收系统的正确运行。
- Positive pressure and negative pressure combines together, making veneer more stable and durable. 正负压力结合，使贴面更牢固持久。
- Can ensure furnace negative pressure automatic and relative protection to normally running. 可确保炉膛负压自动及有关保护的正常投运。
- The negative pressure causes the acceleration of the Universe, as observed from the type Ia supernova observations. 负压强令宇宙膨胀不断加速,就有如从观测Ia型超新星所得出的结论一样。
- A reversal of normal flow in the system caused by a negative pressure (vacuum or partial vacuum) in the supply piping. 由供应管道内的负压力(真空或部分真空)产生的系统内正常流体的倒流。
- The vital signs of The beagles of the negative pressure suction group were stable, could not be observed transparent limb tic and total body reactions. 负压抽吸组犬术中生命体征较平稳，未发现明显的肢体抽动及全身反应。
