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- double action rod pump 双作用抽油泵
- Anti-sand rod pump with helically-grooved barrel. 泵筒带螺旋槽的新型防砂卡抽油泵。
- Double Action: hammer fully down and all chambers may be loaded. 双动式:击槌完全释放并且所有的药室中都可以上弹。
- For double action self-loaders and revolvers the hammer must be down. 如果是双动式自动手枪和转轮手枪,则击槌必须释放。
- Once producing by socker rod pump, the velocity and pressure of liquid are changing with the time in unsteady flow. 在有杆泵抽油生产条件下,流体的速度和压力都随时间变化,处于非稳定流动状态。
- This article recommends the process of direct quenching after carburizing for sucker rod pump liners. 介绍了抽油泵衬套渗碳后直接淬火处理工艺。
- The corrosion and wear of rod pump well cause the damage of downhole equipment and seriously affect the normal production of oil well. 有杆泵井中的腐蚀和磨损，造成油井的井下设备损坏，严重影响油井的正常生产。
- An exfoliationg double action treatmenr with apple& lemon glycol acid peel of the surface layer of skin that bears all imperfections. 是一种拥有双重脱皮作用，能有效刺激细胞更生，减少面部一切瑕疵。
- An exfoliationg double action treatmenr with apple &lemon glycol acid peel of the surface layer of skin that bears all imperfections. 是一种拥有双重脱皮作用，能有效刺激细胞更生，减少面部一切瑕疵。
- When using the mechanical recovery method with sucker rod pump in directional and horizontal wells,it needed install to centralizer on sucker rod string. 在定向井、水平井中使用有杆泵机械采油方法时,需要在抽油杆柱上安装扶正器。
- This paper proposes double action parallel indexing cam mechanism,and studies cams profile by methods used in gear meshing. 提出了双作用式平行分度凸轮机构,并按研究齿轮啮合的方法研究其凸轮廓线。
- The apple has stop have diarrhoea and aperient double action, because the special material such as tannic acid, pectic, prandial fiber is contained in the apple,be. 苹果之所以有止泻和通便的双重作用，是因为苹果中含有鞣酸、果胶、膳食纤维等特殊物质。
- Determination of pump setting depth and selection of suction parameters are key to rod pumping. 有杆泵采油时,泵挂深度的确定和抽吸参数的优选始终被人们所关注。
- The new unit adopts hollow sucker rod working with pump and as fluid passage instead of conventional sucker rod, and uses a new hanger to fix the one-piece barrel rod pump on the casing wall, improving the operation stability of the subsurface pump. 针对这种情况，大港油田新世纪机械制造有限公司研制成功一种新型无油管采油装置，这种装置以空心抽油杆代替实心抽油杆带泵工作并兼作出油流道，还通过一种新型悬挂器将整筒抽油泵固定在套管壁上，提高了抽油泵的工作稳定性。
- To solve the problem of rod floating during the operation of conventional rod pumps in heavy oil wells, a telescoping sucker rod pump is developed. 针对普通抽油泵在稠油井中使用时存在抽油杆柱下行困难的问题,提出一种套装式抽稠油泵。
- The article analyses the reason of downhole corrosion and wear, shows the destinguish method of downhole corrosion and wear and puts forward measures to retard corrosion and wear in rod pump well. 分析了油井井下腐蚀和磨损的产之原因，阐述了井下腐蚀和磨损的鉴别方法，提出了减缓有杆系井腐蚀和磨损的措施。
- Compressible gas spring, Lockable gas spring,Balanced gas spring, Pressure adjustable gas spring, Pull Stretch Gas Spring, Double damping force gas spring, Double action gas spring and damper. 压缩气弹簧、角调气弹簧、平衡气弹簧、压力可调气弹簧、拉伸气弹簧、双向阻尼气弹簧、双向气弹簧、阻尼器。
- The oil producing method with electric pump is the second common method in use less than rod pumping in Shengli petroliferous province. 电泵采油是胜利油区仅次于有杆泵采油的第二大采油方式。
- A steep slope zone is recognized between the central uplift and the eastern depression and can be classified as a slope break zone resulted from the double action of tectonism and erosion. 研究发现，在盆地中部隆起与东部坳陷之间存在着一个陡坡带，可将其归为构造与侵蚀双重作用成因的坡折带。
- The structure of closed valve bonnet influences the perfor-mance of sucker rod pumps. 闭式阀罩是影响抽油泵使用性能的零件。
