| 摘要 |
FIELD: oil production. SUBSTANCE: hydraulically driven system of oil well pump for driving oil well pump sucker-rod (not shown) includes main piston placed inside the main cylinder. The main piston has drive piston stem coming out through one end of the main cylinder. The drive steam is connected to connecting rod neck of eccentric crank. The eccentric crank is driven at constant rotational speed to impart reciprocation to the main piston inside the main cylinder in sinusoidal rhythm. The central sealing unit divides the main cylinder into working chamber, and pressurized chamber i opposite ends of the main cylinder. Each appropriate chamber forms liquid volume that is varied as the main piston moves. Motion of the main piston creates two-way flow of the working liquid from working chamber. Well mouth hydraulic unit is on line with oil well pump sucker rod and open through water line to the working chamber of the main cylinder to receive flow of working liquid. Well mouth hydraulic unit reaction to motion of working liquid flow results in reciprocation of oil well pump sucker-rod under the rhythm of the main piston motion. Gas accumulator is open through liquid system to butt working chamber of the main cylinder section to exert rising shift force to well mouth hydraulic unit. EFFECT: high capacity. |
