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Novel energy-saving hydraulic pumping unit

A pumping unit and hydraulic technology, which is used in the production of fluids, wellbore/well components, and earth-moving drilling, etc., can solve the problem that the energy of the motor cannot be effectively utilized, the balance effect is not ideal, and the recovery of the gravitational potential energy of the sucker rod system is limited, etc. question

Inactive Publication Date: 2009-12-02
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current hydraulic pumping units, whether using counterweight balance or air balance, have unsatisfactory balance effects, resulting in limited recovery of the gravitational potential energy of the sucker rod system during the downstroke, and the energy of the motor cannot be effectively utilized

Method used

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  • Novel energy-saving hydraulic pumping unit

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Embodiment Construction

[0006] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0007] figure 1 It is a basic structural diagram of the present invention, and it can be seen from the figure that the composite cylinder 7 is composed of serial hydraulic cylinders, forming four oil chambers Q1, Q2, Q3 and Q4. The chambers Q2 and Q3 are respectively connected to the two oil ports of the electro-hydraulic reversing valve 6, and the chamber Q1 is connected to the accumulator. The Q4 cavity is connected with the fuel tank 9 . Through the reversing of the electro-hydraulic reversing valve 6, the chambers of Q2 and Q3 alternately supply and return oil. The overflow valve 3 plays a role of safety protection, and the valve opens to overflow when the system is overloaded. When the pressure on the left side of the one-way valve 4 is greater than the pressure on the right side, the hydraulic pump 1 can supply oil to the Q1 cavity and the acc...

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Abstract

The invention relates to a novel energy-saving hydraulic pumping unit, which comprises a hydraulic pump 1, an overflow valve 2, an overflow valve 3, a one way valve 4, an energy accumulator 5, an electro-hydraulic direction-changeover valve 6, a compound cylinder 7, a piston rod 8, an oil tank 9, a pulley 10, a rope 11, a pumping rod 12, a motor 13 and the like. The novel energy-saving hydraulic pumping unit adopts a hydraulic driving system and an energy accumulator balanced system, utilizes the energy accumulator 5 to collect gravitational potential energy released by the pumping rod 12 system and store the energy of the motor 13 in the down stroke, releases the energy in the up stroke, and can effectively reduce the installed power and the speed fluctuation of the motor to achieve the energy-saving effect. The novel energy-saving hydraulic pumping unit also has the advantages of large lifting force, light weight, convenient adjustment of stroke length and stroke frequency and the like of the conventional hydraulic pumping unit.

Description

technical field [0001] The invention relates to a novel energy-saving hydraulic oil pumping unit, which belongs to oil production equipment in oil fields. Background technique [0002] Conventional beam pumping units have the advantages of simple structure, easy manufacture, high reliability, good durability, convenient maintenance, and adaptability to field conditions, etc., and occupy a pivotal position in oil production machinery. However, due to the structural characteristics of the conventional beam pumping unit itself, it has the disadvantages of poor balance effect, large net torque fluctuation of the crankshaft, negative torque, low working efficiency and large energy consumption. In addition, the stroke and the number of strokes cannot be adjusted continuously, and it is difficult to realize automatic control of oil production. The hydraulic pumping unit has the advantages of compact structure, light weight, easy realization of long stroke, low stroke frequency and...

Claims

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Application Information

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IPC IPC(8): E21B43/00
Inventor 姚进高伟
Owner SICHUAN UNIV
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