Abstract: Disclosed are a digitized automatic control method for oil-pumping and a digitized balance-shifting pumpjack, said pumpjack comprising a main motor (15), a decelerator (8), a crank (9), a connecting rod (6), a walking walking beam (3), a balance arm (7), a derrick (5), a horsehead (2), a substructure (12), brake device (13), a beam hanger (1), a load sensor (17), a stroke process measurer, a safety stop device, and a digitized control box (14). A movable counterweight box (28) moves leftward and rightward on the balance arm (7), automatically balancing load at the suspension center in various operating conditions, and pumpjack's frequency of stroke is automatically adjusted according to variations in pump fullness. Features include safety and reliability, convenience of operation, enhanced oil well production, balance rates, energy conservation and consumption reduction.

Abstract: Disclosed are a digitized automatic control method for oil-pumping and a digitized balance-shifting pumpjack, said pumpjack comprising a main motor (15), a decelerator (8), a crank (9), a connecting rod (6), a walking walking beam (3), a balance arm (7), a derrick (5), a horsehead (2), a substructure (12), brake device (13), a beam hanger (1), a load sensor (17), a stroke process measurer, a safety stop device, and a digitized control box (14). A movable counterweight box (28) moves leftward and rightward on the balance arm (7), automatically balancing load at the suspension center in various operating conditions, and pumpjack's frequency of stroke is automatically adjusted according to variations in pump fullness. Features include safety and reliability, convenience of operation, enhanced oil well production, balance rates, energy conservation and consumption reduction.