Load bearing pump rotor tag bar

Details Load bearing pump rotor tag bar Load bearing pump rotor tag bar

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2317032

A rotating tag bar is positioned below a progressive cavity pump stator for supporting at least a portion of a rod string a rotor. A tubular housing is secured to the stator and is fitted with a rotatable platform. The platform blocks downward stretch of the rotor and then rotatably support the rotor on a thrust bearing. Thereby, rotor-imposed loads on the platform translate into tensile loads directed into the stator, which is suspended from tubing string, lessening the load on the rod string and thereby both reducing the need for extreme accuracy in rotor positioning and reducing rod string and tubing wear. Optionally, a no-turn tool transmits load from the stator into the casing. In operation, the rotor is landed to contact the platform. The rotor is then lifted a distance less than the anticipated stretch so that when in operation, the rotor sets down on the platform and transfers at least a portion of the rod string load into stator.

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