Screw pump lifting system based on synchronous reluctance submersible motor

• Main Authors: ZHENG XIAOQUAN, LIU JIANFEI, LIU JIANCHAO, ZHANG XIMING
• Format: Patent
• Language: Chinese; English
• Published: 31.01.2023
• Subjects: BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRICITY; FIXED CONSTRUCTIONS; GENERATION; 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 FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

The invention relates to an oil extraction system, in particular to a screw pump lifting system based on a synchronous reluctance submersible motor, which is suitable for crude oil extraction of an inclined shaft, a horizontal well and a heavy oil well, and is characterized by at least comprising the synchronous reluctance submersible motor, a high thrust protector, a bidirectional thrust flexible shaft coupling, a screw pump, a power cable and a control unit, the synchronous reluctance submersible motor is arranged on an oil pipe at the lower end of an oil well, the high-thrust protector, the bidirectional thrust flexible shaft coupler and the screw pump are sequentially connected from the upper end of the synchronous reluctance submersible motor to the upper end of the oil pipe through pipe fittings, and the screw pump outputs collected oil to a wellhead unit through a check valve and a reflux valve. According to the system for deep well oil extraction by driving the screw pump through the submersible motor