Patent ID: 8950473
Filing Date: 2015-02-10
Classification: E21B,F04B,Y10T

Abstract:
1. A counterbalance system for a cantilevered beam pumping unit, the counterbalance system including: (a) a support structure adapted to be mounted on a walking beam of a cantilevered beam pumping unit in an operating position in which the support structure extends transverse to the walking beam from a first lateral side of the counterbalance system at a first side of the walking beam to a second lateral side of the counterbalance system at a second side of the walking beam opposite the first side of the walking beam, the support structure including a forward support element and a rear support element, the forward support element residing proximate to a front of the walking beam when the support structure is in the operating position, with the rear support element residing relatively further away from the front of the walking beam, both the forward support element and the rear support element extending transverse to the walking beam; (b) a first outrigger member extending from the forward support element to the rear support element with a suspension end of the first outrigger member positioned on the first lateral side of the counterbalance system; (c) a second outrigger member extending from the forward support element to the rear support element with a suspension end of the second outrigger member positioned on the second lateral side of the counterbalance system; (d) a first suspension element connected to the first outrigger member so as to depend from the suspension end of the first outrigger member when the support structure is in the operating position, the first suspension element adapted to receive a first counterbalance weight and suspend the first counterbalance weight from the first outrigger member when the support structure is in the operating position; and (e) a second suspension element connected to the second outrigger member so as to depend from the suspension end of the second outrigger member when the support structure is in the operating position, the second suspension element adapted to receive a second counterbalance weight and suspend the second counterbalance weight from the second outrigger member when the support structure is in the operating position.