Injector pump

摘要

An injection pump comprising a barrel and plunger type tubing pump for pumping liquid from a deep borehole through tubing while injecting a treating liquid down through a hollow sucker rod. Just above the traveling valve is a blender coupling means. The hollow passage through the sucker rod communicates through an injector pipe to the top of a shallow bore in the top of the blender coupling means. There are two drilled openings through the wall so that liquid pumped down the sucker rod passes through the wall into the annular space between the traveling valve and the barrel where it can mix with the entering well liquids in a mixing zone between the traveling valve on the bottom end of the plunger and the standing valve of the barrel. There are a plurality of drilled holes in a circle surrounding the central bore in the blender coupling so that fluid passing up through the traveling valve can flow upwardly through these drilled holes into an annular space between the internal surface of the barrel and the injector pipe and through a hole in the wall of the plunger, and into the annulus between the sucker rod and the tubing. It then flows up the tubing as in conventional pumps.