| 摘要 |
<p>After an existing lower rod lock (100) is tightened to keep a pump rod (3000), which extends from a stuck pump rotor, from sliding down into a well, an existing upper rod lock/drive (300) is loosened to allow the rod to slide through the upper rod drive. The present invention is then mounted to the rod or an extension thereof, and locked in place by means of a temporary lifting rod lock (4000). When hydraulic fluid is passed through the system of the present invention, a hydraulic cylinder (s) (3600,3700) causes the rod to be pulled upwards, thereby pulling a pump rotor upwards out of sand buildup which entraps said pump rotor.</p> |
