TUBING ANCHOR CATCHER WITH ROTATING MANDREL

摘要

A cased wellbore extends downhole to a pay zone which isproduced by a rod actuated downhole pump that lifts fluid from thebottom of the wellbore up through a tubing string to a wellhead.The pump is seated in a pump cavity, and the tubing string is ten-sioned and is rotated. The upper end of the tubing string is at-tached to a fluid conveying swivel means and a tubing rotator. Acombination tubing anchor having a fluid conveying rotatable man-drel is attached adjacent to and forms part of the lower end ofthe tubing string by which the lower end of the tubing string isrotatably and releasably affixed to the casing in proximity to thelower end of the wellbore. A plurality of radially active slipsare actuated in response to manipulation of the tubing string toextend the slips into engagement with the casing wall and to re-tract the slips in order to remove the tubing string from theborehole.