Improvements in lubricant pumping devices in petroleum well installations. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in lubricant pumping devices in oil well installations, of the type comprising a casing pipe, a production pipe located concentrically inside the casing, a pump of the alternative type in the lower part of the pipe, a string of pump bars with reciprocating movement in the tube to operate the pump, characterized in that each device is provided with a set of tubing incorporated in the production tube and comprising a sub-assembly or auxiliary piece for sealing the bar, means releasably securing the seal sub-assembly of the rod to the pipe assembly, and a recovery tool incorporated in the pump rod to be coupled to the auxiliary part or sealing subassembly of the pump rod and extracting it of the pipe assembly and the production pipe without removing the production pipe from the casing pipe. (Machine-translation by Google Translate, not legally binding)