screw-feed pump

By taking 135 three-screw pump as an example, the geometric parameter design, the forming of spiral surface and the characteristic of screw gearing are investigated.

以135型三螺杆泵为例，对螺杆几何参数设计、螺旋型面的形成、螺杆啮合特性进行了探讨。

Research and application of the forging thread off prevention hollow sucker rod used in the screw pump

镦锻式螺杆泵防脱空心抽油杆的研制与应用

Creation of dummy model of main screw and accessorial screw of screw pump

螺杆泵主从螺杆虚拟建模

The level of screw pump well being managed is more improved and that sucker rod break and collar thread off is delayed effectively, the exempt workover period is prolonged.

该技术的应用进一步提高了螺杆泵井的管理水平，有效的减缓了抽油杆的频繁断、脱问题，延长了检泵周期。

Disabled Analysis of Axial Pre-tighten Screw Thread on Super High-Speed Turbo-Pump of a Certain Servo System

某伺服系统超高速涡轮泵轴系预紧螺纹联接失效分析

A thermal expansion valve and an electronic expansion valve was tested in a Air Cooled Screw Heat Pump respectively.

在风冷螺杆热泵机组上对电子膨胀阀与热力膨胀阀进行了机组性能的对比试验。

The single screw oil pump is a new type extracting oil pump, which is simple in structure and high in performance with low working cost.

单螺杆抽油泵是一种新型的采油泵，结构简单，性能可靠，作业成本低。

Three kinds of pumps, hydraulic jet pump, electrical submersible pump ( ESP) and screw pump, have been used for artificial production in the oilfield and the hydraulic jet pump driven by processed production waste water has showed the best performance.

该油田采用过的人工举升采油方式有射流泵、电潜泵和螺杆泵采油3种，其中以用生产污水为动力液的射流泵采油效果最好。

Apparatus for centralization and thread off prevention of rod string in screw pump holes

螺杆泵杆柱扶正防脱扣装置及其应用

Aimed at the problems that sucker rods of the ground drive screw pump break and collars thread off frequently, the frequency conversion timing equipment of screw pump wells and the automatic control system are developed.

针对地面驱动螺杆泵抽油杆断、脱频繁，单井提液调参难以控制等问题，开发了螺杆泵井的变频调速装置及自动控制系统。