Special Drive Rod Device for Screw Pumps
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The Special Drive Rod Device for Screw Pumps is a newly developed type of sucker rod specifically designed for surface-driven screw pump oil recovery systems. It improves the strength of the drive rod column and enhances the reliability of connection points, thereby reducing common issues such as rod breakage, thread stripping, and detachment.
The special drive rod for screw pumps is available in two types: solid and hollow. The connection forms include the following two structures (as shown in Figures 1 and 2):
Double-shoulder straight thread structure
Wedge-type left-hand thread structure