Dual well balance type hydraulic pumping unit and working method thereof

• Main Authors: HUO BINGXIN, XU ZHENGGUO, LI NINGHUI, HE BENLING, LI KAILIAN
• Format: Patent
• Language: Chinese; English
• Published: 29.06.2011
• Subjects: BLASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The invention discloses a dual well balance type hydraulic pumping unit and a working method thereof. A hydraulic control reversing valve plug is arranged in a hydraulic control reversing valve outer tube; a reversing control pipeline is arranged in the hydraulic control reversing valve plug; two ends of the reversing control pipeline are connected with hydraulic cylinders on the left and right sides; the middle of the hydraulic control reversing valve outer tube is provided with two hydraulic pump mouths which are communicated with hydraulic pipelines on the left and right sides; the other ends of the hydraulic pipelines on the left and right sides are connected with the hydraulic cylinders on the left and right sides; large pistons are connected with long piston rods in the hydraulic cylinders on the left and right sides, and a check valve is arranged between each large piston and each long piston rod; the hydraulic cylinders are in threaded connection with well mouth flanges; the two hydraulic cylinders ar