دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a mechanism for anchoring a bottomhole pump in a well;located on the lower end of the pump. Compare top hold-down.

n: a mechanism, located at the top of the working barrel, for anchoring a sucker rod pump to the tubing. Compare bottom hold-down.

n: a sucker rod insert pump in which the working barrel travels and the plunger remains stationary. The working barrel is connected to the sucker rod string through a connector and the traveling valve;the standing valve is connected to the top of the plunger, which in turn is connected to the bottom hold-down.