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Periodic speed-changing driving energy-saving method for oil-pumping machine

A pumping unit, speed technology, applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of low operating efficiency of the pumping unit, achieve optimized operating characteristics, small starting current, save power and The effect of maintenance costs

Inactive Publication Date: 2008-04-02
HARBIN FIVE RING ELECTRIC APPLIANCE MFGCORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] For a long time, the professional circles of relevant countries in the world have been working hard to solve the problem of low operating efficiency of pumping units, and have also developed a variety of new products; The cost is being paid attention to, and various domestic departments have also invested a lot of money, manpower and material resources to improve and increase the operating efficiency of the pumping unit. However, until now, no technical solution to effectively solve this problem has been found.

Method used

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  • Periodic speed-changing driving energy-saving method for oil-pumping machine

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Embodiment Construction

[0025] The variable-speed dragging method of the beam pumping unit is realized by a system composed of the following parts.

[0026] The power required by the long piston pump installed in the lower part of the oil well is transmitted from the wellhead on the ground through a long tie rod of thousands of meters. The steel wire rope fixed on the upper end of the tie rod is connected with the transmission beam. The connecting rod is connected with two crankshafts, and then through these heavy parts such as heavy-duty reducer and large pulley, and several large balance weights with a weight of several tons on the crankshaft are connected with the AC induction motor. Because the inertia of the entire transmission system is particularly large, when the pumping unit starts, the motor must provide a larger inertial load torque to accelerate the transmission system in addition to the load torque required for liquid pumping and lifting. The size of the specific torque is based on wheth...

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Abstract

The present invention relates to a pumping unit periodic speed-changing drive energy-saving method. It is from walking-beam pumping unit, sucker-rod oil pump and high starting torque AC motor special for oil pumping unit. According to the periodically-changed pulsation load torque of oil pumping unit the motor can automatically steplessly regulate its running rotating speed. Said method can make swabbing parameter of downhole piston pump more reasonable, at the same time also can reduce backleakage of piston under the condition of superlow speed, so that it can raise the production of the oil well, and can save lots of electric energy.

Description

technical field [0001] The invention relates to a beam pumping unit used for oil recovery in an oil field and its electric driving technology, in particular to an energy-saving method for periodically variable speed driving of the pumping unit. Background technique [0002] The beam pumping unit has the advantages of simple structure, low price, and low maintenance cost. It has been widely used in oil fields at home and abroad for half a century, but it also has serious shortcomings. The pumping unit is a device that starts with heavy load and runs with light load for a long time, and belongs to the output characteristics of the AC torque motor. However, the AC torque motor in the prior art converts the excess slip power into heat energy by increasing the resistance value of the rotor circuit and then dissipates it. If the required torque characteristics are realized by means of the rotor circuit, the large resistance of the rotor circuit causes a large amount of heat, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00
Inventor 江允良
Owner HARBIN FIVE RING ELECTRIC APPLIANCE MFGCORP
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