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Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology

A closed-loop, frequency conversion technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of low efficiency, poor self-control, and high energy consumption, and achieve flexible system control, improve efficiency, reduce The effect of installed power

Inactive Publication Date: 2005-01-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the above-mentioned deficiencies of high energy consumption, low efficiency and poor self-control, the object of the present invention is to provide a closed circuit hydraulic pumping unit with frequency conversion technology that reduces installed power

Method used

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  • Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology
  • Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology

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Experimental program
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Embodiment Construction

[0024] As shown in Figure 1, the present invention includes:

[0025] Mechanical part: the upper and lower pistons of the hydraulic cylinder plunger 82 match the hydraulic cylinder 83, a hydraulic cylinder partition 86 is installed between the two pistons, the fixed pin 81 and the roller bracket 80 connect the end of the hydraulic cylinder plunger 82 with the movable pulley 78 , the movable pulley 78 is wound with a wire rope 79, one end of the wire rope 79 is connected to the fixed base frame 67, the other end is connected to the polished rod 85 of the pumping unit, and the polished rod 85 of the pumping unit is connected to the oil extraction pipe 88 through the christmas tree 87.

[0026] Hydraulic part: One end of the two-way pump / motor 24 is connected to the oil inlet of the first hydraulic control check valve 56 through the hydraulic pipeline 31, and then connected to the upper piston oil chamber 83A of the hydraulic cylinder 83 through the hydraulic pipeline 59, and the ...

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Abstract

This invention publicized one kind to use the frequency conversion technology closed type the return route hydraulic pressure pumping unit The application frequency conversion technology control motor rotational speed, the control pumps the output current capacity, then the control pumping unit running rate, may enable the oil pump the dynamic coordination, the production increase, the energy conservation obvious: The frequency conversion velocity modulation can provide the current capacity according to the system demand the low overflow loss, how regardless of the load does change, the output all can adapt the load request change, has very strong automatic control About the use the limit switch, the speed, the position transmitter and so on, through the controller, the frequency changer realization to the electric motor and the control valve electro-magnet and so on the vector transformation control technology, the realization overloads, crosses the electric current, overvoltage, the instant loses speed and so on the protection function This invention from enhances the pumping unit the overall efficiency to embark, in reduces the pumping unit the installing equipment power, effectively uses the pumping unit under good energy at the same time, maximum limit enhances the hydraulic pump and the electrical machinery efficiency This pumping unit may widely apply to the oil field extraction

Description

Technical field [0001] The invention relates to a device for extracting fluid from a well, in particular to a closed circuit hydraulic pumping unit using frequency conversion technology. Background technique [0002] At present, a kind of mechanical pumping equipment—rod pumping unit is generally used in oilfield development, which can be divided into beam pumping unit and beamless pumping unit. Beam pumping units are widely used in oil fields due to their durability, reliable components, and convenient maintenance. However, the rod pumping unit also exposed certain problems during its use: [0003] (1) Large installed power, high energy consumption and low efficiency [0004] Due to the large size and complex structure of the beam pumping unit, it has a large installed power. At present, the average installed capacity of pumping units in onshore oilfields is more than 32.6kw each, and the annual power consumption of rod pumping units in onshore oilfields in my country is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00
Inventor 徐兵欧阳小平马吉恩
Owner ZHEJIANG UNIV
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