PUMPING UNIT Russian patent published in 1999 - IPC

FIELD: oil producing equipment; mechanized oil recovery by means of sucker-rod oil-well pumps. SUBSTANCE: pumping unit is just twin unit with two rotor-type walking beams mounted on common base and interconnected by means of flexible rod; walking beams are loaded through flexible suspensions of wellhead rods by sucker-rod strings of similar mass in two identical oil-producing wells and set in alternating opposite swinging by means of one crank mechanism provided with counterweight for compensating for probable difference in wells. EFFECT: enhanced economical efficiency due to improved balancing of sucker rod strings; reduced usage of metal; reduced power requirements at simultaneous operation of two cluster wells. 1 dwg