Oil production pump

A technology for oil production pumps and oil well pumps, applied to pumps, pumps with flexible working elements, liquid displacement machinery, etc., can solve problems such as waste of energy, difficulty in stroke adjustment, complex structure, etc., and achieve energy saving and oil output cycle The effect of long life and small oil output

Inactive Publication Date: 2014-01-08
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
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Problems solved by technology

[0003] In the prior art, there are also many improvement schemes aimed at the shortcomings of conventional downhole oil well pumps and surface beam pumping units, such as a downhole hydraulic oil well pump disclosed in Patent No. 201220171144.X, the entire pump body is installed on At the bottom of the oil well, a hydraulic transmission system is installed at the bottom of the oil well pump, and the piston of the hyd...

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation.

[0019] Such as figure 1 As shown, an oil production pump includes an oil well pump 1 and a hydraulic system. The hydraulic system is arranged at the lower end of the oil well pump 1. The key point is that the oil well pump 1 includes a pump body 2, which is cylindrical. The cross-sectional area of ​​the cavities at both ends is smaller than the cross-sectional area of ​​the cavity in the middle of the pump body 2. The lower end of the pump body 2 is a closed surface, and a square hole or a round hole is arranged on the closed surface. An oil inlet valve 9 is arranged on the top, and the oil inlet valve 9 is a one-way valve; an oil suction pipe 3 is arranged at the axial middle position inside the pump body 2, and the oil suction pipe 3 is also cylindrical, and its length is shorter than that of the pump body. 2, the upper and lowe...

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Abstract

The invention discloses an oil production pump which comprises an oil-well pump and a hydraulic system. The oil production pump is characterized in that the oil-well pump comprises a pump body, the lower end portion of the pump body is a sealed face which is provided with an oil inlet, an oil inlet valve is arranged on the oil inlet, an oil pumping pipe is vertically arranged in the pump body above the oil inlet valve, an upper piston is arranged outside the upper end portion of the oil pumping pipe in a sleeved mode, a lower piston is fixedly arranged on the lower end portion of the oil pumping pipe in a sleeved mode, the upper piston, the lower piston, the oil pumping pipe and the pump body form a sealed hydraulic oil storage chamber, a middle piston is fixedly arranged in the middle of the oil pumping pipe in a sleeved mode, the middle piston divides the hydraulic oil storage chamber into an upper chamber and a lower chamber with changeable volumes, the upper chamber and the lower chamber are communicated with the hydraulic system through pipelines respectively, and an oil outlet valve is arranged at an upper end outlet of the oil pumping pipe.

Description

technical field [0001] The invention relates to the field of oil extraction machinery, in particular to an oil extraction pump. Background technique [0002] At present, the oil pumping device of oil exploitation is mainly made up of downhole pump and ground beam pumping unit. Affected by geological conditions and production time, many oil fields have very small oil production in the later stage. However, in the face of the increasingly tense energy situation, it is necessary to carry out refined mining in the late stage of oil fields, and the oil fields that were abandoned due to small oil production in the past are now There is also a need for mining; conventional downhole pumps and surface beam pumping units will be incompetent for oil production and development of oil wells with small oil output. The pumping units have extremely low working efficiency and high energy consumption, which greatly increases the development cost. Benefits and pay are seriously out of proport...

Claims

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Application Information

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IPC IPC(8): F04B47/00
Inventor 唐德东严欣平李鹏飞朱红军
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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