CN1782325A - Method for low frequency large current heating raw oil in oil wel pipe string - Google Patents
Method for low frequency large current heating raw oil in oil wel pipe string Download PDFInfo
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- CN1782325A CN1782325A CN 200410036546 CN200410036546A CN1782325A CN 1782325 A CN1782325 A CN 1782325A CN 200410036546 CN200410036546 CN 200410036546 CN 200410036546 A CN200410036546 A CN 200410036546A CN 1782325 A CN1782325 A CN 1782325A
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- oil
- low frequency
- power supply
- sucker rod
- pipe
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Abstract
The low frequency great current method of heating raw oil tubular column adopts low frequency heating power source, heating circuit and heating tubular column structure, and features that in the low frequency heating power source, 380 V 50 Hz triphase current is converted first into 40 V AC in a transformer and then into AC of frequency 0.5-10 Hz, voltage lower than 40 V and current 100-2000 A in a conversion circuit under the control of a main control board, and that the low frequency heating power source has one pole connected directly to the top of the pump rod and the other pole connected to the pump piston in the bottom of the pump rod or pump rod centralizer to form a loop and produce heat energy over 10 KW.
Description
One, technical field
The present invention relates to a kind of raising pumpingh well temperature in wellbore, increase the method for the big current flow heats oil well pipe of the low frequency crude oil of crude output.
Two, background technology
The electrically heated method of oil well has multiple: common heating means such as direct current heating, the electrical heating of 50HZ power frequency, intermediate frequency electrical heating, heating using microwave.These methods respectively have characteristics:
The direct current heating is to adopt direct current that the logical big electric current of sucker rod is heated, though efficiency of heating surface height imports to very dark down-hole with heat energy easily, has electrolytic effect, the corrosion oil well.
In order to solve the electrolytic effect of DC heating, some companies have developed the equipment that 50HZ power frequency mode adds hot oil wells, 50HZ power frequency firing equipment is very simple, solved the shortcoming of the electrolytic effect of DC heating, but owing to be a very big distributed resistance, electric capacity, inductive load on the oil well electricity, there is very big inhibition in the 50HZ alternating current, be difficult to capacity is imported to darker zone, so efficient is low.This point has identical shortcoming with steam, hot water heating.
In order to solve the shortcoming that the power consumption of power frequency heating oil extraction is big, the thermal efficiency is low, some companies have succeeded in developing intellectual intermediate frequency heating oil extraction the complete sets of equipment on the basis that power frequency electrical heating practice data is analyzed and studied.It replaces power frequency supply with program control intermediate frequency power supply, compares volume-diminished, weight saving with power frequency heating power supply commonly used, and steel armored cable replaces extraordinary heating cable.That this method remains is low at cost height, efficient, construct, safeguard problems such as complexity.
Three, summary of the invention
The method that the purpose of this invention is to provide the big current flow heats oil well pipe of a kind of low frequency crude oil solves DC heating that above-mentioned prior art exists and has that electrolytic effect, corrosion oil well, power frequency heating, oil well resistance cause greatly that the efficiency of heating surface is low, heating in medium frequency cost height, construction, maintenance complexity, problem that the efficiency of heating surface is low.
Technical scheme of the present invention realizes in the following manner:
The present invention includes the low frequency heating power supply, heater circuit and heating tube rod structure, it is characterized in that the low frequency heating power supply transforms to the three-phase electricity of 380V.50HZ the alternating current of 40V through transformer, under the control of translation circuit at master control borad, the single-phase low-frequency voltage that becomes 0.5-10HZ is not more than 40V, electric current is the power supply of 100-2000A, an extremely direct top with the sucker rod that heats tubing string of power supply joins, another utmost point of power supply is by oil well pump piston and the pump barrel and the oil pipe formation loop of sucker rod bottom, also can form the loop, produce the above heat energy of 10KW by oil pumping rod centering device and oil pipe.
Low rate heating power supply output and master control borad input join, and the master control borad output joins with cable and sucker rod, and sucker rod constitutes the loop by oil well pump piston and oil pipe, and oil pipe joins by cable and low frequency heating power supply.
In the well mouth of oil well packing box, be provided with the insulation materials of oil pipe and sucker rod, between sucker rod and oil pipe, be provided with centralizer.
Being lined with big conductive material of resistance or pump barrel in the pump barrel is made of the big conductive material of resistance.
On the heavy oil wells with the oil well pump more than three grades, can not establish the big conductive material of resistance inside and outside the pump barrel.
Compared with the prior art the present invention has the following advantages:
1, with oil supply tubing string heating crude oil safety of the present invention, output voltage is low, and personnel are not had injury.
2, the principle of the invention is rational in infrastructure, and mode of heating is simple and reliable, adopts direct heating means, thermal efficiency height.
3, the down-hole does not have attachment device, and installation and maintenance are convenient.
4, cost performance height.
Four, description of drawings
Fig. 1-circuit principle structure figure of the present invention;
Fig. 2-oil well pipe structure chart of the present invention.
Five, the specific embodiment
For further disclosing technical scheme of the present invention, be described in detail by embodiment below in conjunction with Figure of description 1,2:
The present invention such as Fig. 1, shown in 2, comprise low frequency heating power supply 1, heater circuit (shown in Figure 1) and heating tube rod structure (as shown in Figure 2), the three-phase current of the 380V.50HZ of low frequency heating power supply self-contained electric system in 1 future transforms to the alternating current of 40V through transformer, through translation circuit under the control of master control borad 2, the single-phase low-frequency voltage that becomes 0.5-10HZ is not more than 40V, electric current is the power supply of 100-2000A, a utmost point joins by the direct top with the sucker rod 2 that heats tubing string of cable, oil well pump piston pump barrel 5 by the sucker rod bottom forms the loop with oil pipe 4, oil pipe joins by cable and another utmost point of low frequency heating power supply, also can form loop, the electric energy of power output more than 10KW with oil pipe 4 by the centralizer 6 of sucker rod 3.In the well mouth of oil well packing box, install insulation packing or insulation materials 7, at piston face or establish the conductive material of the big resistance of one deck at the pump barrel inner surface, select for use the oil well pump more than three class precisions to get final product as special heavy oil wells, one deck viscous crude is arranged between piston and the pump barrel, the resistance of viscous crude is much larger than the resistance of sucker rod, electrical heat energy all concentrates on the sucker rod and consumes, thereby the very fast heating of crude oil in the tubing string, simultaneously piston as heat transfer medium also with heating crude oil in the pump barrel, so both improved pump efficiency, also reduce the oil pumper load, reach the purpose that improves oil well output and saves energy.
Claims (3)
1, the method of the big current flow heats oil well pipe of a kind of low frequency crude oil, comprise the low frequency heating power supply, heater circuit and heating tube rod structure, it is characterized in that the low frequency heating power supply transforms to the three-phase electricity of 380V.50HZ the alternating current of 40V through transformer, under the control of translation circuit at master control borad, the single-phase low-frequency voltage that becomes 0.5-10HZ is not more than 40V, electric current is the power supply of 100-2000A, an extremely direct top with the sucker rod that heats tubing string of power supply joins, another utmost point of power supply is by oil well pump piston and the pump barrel and the oil pipe formation loop of sucker rod bottom, also can form the loop, produce the above heat energy of 10KW by oil pumping rod centering device and oil pipe.
2, the method for the big current flow heats oil well pipe of low frequency according to claim 1 crude oil, it is characterized in that low rate heating power supply output and master control borad input join, the master control borad output joins with cable and sucker rod, sucker rod constitutes the loop by oil well pump piston and oil pipe, and oil pipe joins by cable and low frequency heating power supply.
3, the method for the big current flow heats oil well pipe of low frequency according to claim 1 crude oil is characterized in that being provided with the insulation materials of oil pipe and sucker rod in the well mouth of oil well packing box, be provided with centralizer between sucker rod and oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410036546 CN1782325A (en) | 2004-12-02 | 2004-12-02 | Method for low frequency large current heating raw oil in oil wel pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410036546 CN1782325A (en) | 2004-12-02 | 2004-12-02 | Method for low frequency large current heating raw oil in oil wel pipe string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1782325A true CN1782325A (en) | 2006-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410036546 Pending CN1782325A (en) | 2004-12-02 | 2004-12-02 | Method for low frequency large current heating raw oil in oil wel pipe string |
Country Status (1)
| Country | Link |
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| CN (1) | CN1782325A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101641495B (en) * | 2007-03-22 | 2013-10-30 | 埃克森美孚上游研究公司 | Granular electrical connections for in situ formation heating |
| CN105715231A (en) * | 2016-04-29 | 2016-06-29 | 沧州润涛石油设备有限公司 | Cluster type oil producing well in-turn heating device |
| CN112112578A (en) * | 2020-11-23 | 2020-12-22 | 东营市金亿来石油机械有限公司 | Hollow sucker rod of anti-deflection |
| CN112627784A (en) * | 2019-09-24 | 2021-04-09 | 中国石油天然气股份有限公司 | Low-frequency variable-pressure reservoir exploitation method, device and system for residual oil in pores |
-
2004
- 2004-12-02 CN CN 200410036546 patent/CN1782325A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101641495B (en) * | 2007-03-22 | 2013-10-30 | 埃克森美孚上游研究公司 | Granular electrical connections for in situ formation heating |
| CN105715231A (en) * | 2016-04-29 | 2016-06-29 | 沧州润涛石油设备有限公司 | Cluster type oil producing well in-turn heating device |
| CN105715231B (en) * | 2016-04-29 | 2018-04-24 | 沧州润涛石油设备有限公司 | A kind of clump formula producing well heating unit in turn |
| CN112627784A (en) * | 2019-09-24 | 2021-04-09 | 中国石油天然气股份有限公司 | Low-frequency variable-pressure reservoir exploitation method, device and system for residual oil in pores |
| CN112112578A (en) * | 2020-11-23 | 2020-12-22 | 东营市金亿来石油机械有限公司 | Hollow sucker rod of anti-deflection |
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