beam-balanced pump

beam-balanced pump

[′bēm ‚bal·ənst ′pəmp]
(petroleum engineering)
An oil well pumping unit having a center-pivoted beam with the sucker rod plunger (pump) at the front end and a counterweight on the rearward extension.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.