抽油机

• Air balanced sucker rod pumping unit
  气动平衡抽油机
• Study and application of packing feeder for pumping unit on oil well
  游梁式抽油机井口盘根旋进器的研制与应用
• The research on lower super - long stroke pumping unit with a cylinder - chain
  圆柱链低矮式超长冲程抽油机的研究
• Design of a new - style and long - stroke pumping unit with variable diameter wheel
  新型双变径天轮式抽油机的设计
• Study on calculating method of magnifying multiple of pumping unit stroke
  抽油机冲程无级放大倍数计算方法探讨
• Development of special welding machine for round foint in oil pumping unit
  抽油机驴头圆弧主焊缝焊接专机的研制
• Development of epicyclic gear for wheel - on sky pumping unit with stroke increased
  行星齿轮增程式天轮抽油机的研制
• Neural network - based fault diagnosis expert system for rod pumped well
  基于神经网络的抽油机井井下故障诊断专家系统
• Reforming beam pumping unit into dual variable - diameter wheel pumping unit
  由游梁式抽油机改造成的双变径轮式抽油机
• Study of load characteristic and power factor enhance for pump oil machine
  抽油机的负载特性及提高功率因数措施的研究