Hydraulic jet pump capable of realizing reverse-circulating production and reverse-circulating lifting of pump core

Abstract

The invention relates to a hydraulic jet pump capable of realizing reverse-circulating production and reverse-circulating lifting of a pump core, which comprises a working cylinder and the pump core. The working cylinder comprises an upper joint, an upper sealing nipple, a main cylinder body and a lower joint. The pump core comprises a fishing head, a rubber lifting barrel, an upper connecting nipple, a pump barrel, a high-pressure and low-pressure dividing nipple, a lower connecting nipple and a pump inlet sieve pipe which are connected sequentially, a jet device is arranged in the pump barrel, an upper high-pressure sealing ring is assembled on the outer wall of the upper end of the upper connecting nipple, and a lower high-pressure sealing ring is assembled on the outer wall of the lower end of the high-pressure and low-pressure dividing nipple. The hydraulic jet pump is characterized in that an annular flow passage is formed among the upper sealing nipple, the upper connecting nipple which is arranged on the inner wall of the main cylinder body and corresponds to the pump core and the outer wall of the pump barrel, a sealing face of the upper high-pressure sealing ring is formed on the inner wall of the upper sealing nipple, a guide rail part is mounted between the high-pressure and low-pressure dividing nipple and the lower connecting nipple, and limit blocks which are embedded in rails of the guide rail part are symmetrically fixedly mounted on the main cylinder body.

Description

Technical field [0001] The invention relates to the technical field of oil extraction equipment, in particular to a reverse circulation production and reverse circulation pump core hydraulic jet pump. Background technique [0002] At present, with the continuous development of oil fields and the increase in the number of highly inclined and horizontal wells, conventional rod-based oil production techniques are no longer suitable. To meet the needs of development and production, only rodless oil extraction technology can be used, such as electric submersible pumps, submersible screw pumps, hydraulic jet pumps, and hydraulic piston pumps. However, due to the short operation cycle of submersible screw pump inspections and frequent pump cores of hydraulic piston pumps, these two types of pumps are rarely used. Most oilfields with steep and horizontal wells are produced by submersible electric pumps or hydraulic jet pumps. However, due to the decrease of formation energy, formation o...

AI Technical Summary

Problems solved by technology

Such problems include (1) the complex structure of the downhole tubing string, which increases the workload of the operation, increases the operating cost, and increases the production cost; Small casing and casing-changing wells are not suitable, so the adaptability is narrow; (3) During positive and negative circulation production, it is necessary to change the direction of the power fluid on the outer runner working cylinder, which brings troubles to site management and operation

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