CN2095278U - Electric heater for oil well - Google Patents
Electric heater for oil well Download PDFInfo
- Publication number
- CN2095278U CN2095278U CN 91210758 CN91210758U CN2095278U CN 2095278 U CN2095278 U CN 2095278U CN 91210758 CN91210758 CN 91210758 CN 91210758 U CN91210758 U CN 91210758U CN 2095278 U CN2095278 U CN 2095278U
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- Prior art keywords
- oil
- sleeve pipe
- oil well
- pipe
- wall
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Abstract
The utility model relates to an electric heating device for an oil well, the heating principle of which is to make use of an oil sleeve pipe conductor of the oil well, add an insulated oil pipe hanger, an O-shaped insulated joint and a short circuit anchor facility of an oil sleeve pipe to an oil mining tree to cause the oil sleeve pipe to form a guide passage, and make use of the catheter resistor of the oil sleeve pipe to change the electric energy into the heat energy by communicating the oil sleeve pipe with a power supply to ensure the normal production of the oil well to achieve the functions of heat trace, paraffin prevention, paraffin removal and block removal. Because the oil sleeve pipe becomes a heating body of the skin effect, current only flows through the outer wall of an oil pipe and the inner wall of a sleeve pipe, and no current flows through the outer wall of the oil pipe and the inner wall of the sleeve pipe. The method has the advantages of simple equipment, convenient operation, safety, reliability, investment saving, high heat utilization and obvious heating effect. The production of the oil well can be generally increased by three to five times, the environmental pollution problem can also be solved, and the utility model is superior to any heating means which is applied now.
Description
The utility model relates to a kind of oil well electric heater unit, the oil well electric heater unit that especially utilizes existing casing programme and AC power, production tree insulating short section, insulating oil pipe hanger, casing programme, tubing centrilizer and short circuit anchor critical piece to form.
At present in oil extraction process, extensively adopt 400 ℃ of saturated vapours to handle up and 90 ℃ of hot water or the exploitation of Circulation and Hot Oil Spray method, but this oil production technology, though can keep oil well production, and investment is bigger, heat-energy losses is big, environment pollution is serious, the cost for oil production height, the production management difficulty, deficiency in economic performance is especially to viscous crude, the crude oil content of wax be 52% and freezing point be 65 ℃ high-solidifiability oil field exploitation, will bring bigger difficulty to oil well production, and the output of this two quasi-oil accounts for full total field putput 50%, adopts this conventional oil production technology, and oil well paraffinication is also very serious, be difficult to keep the oil well ordinary production, sometimes cause oil well to stop production, reduce the utilization rate of oil wells, influence the crude oil production task.
Task of the present utility model provides the oil well electric heater unit of a kind of oil well companion heat, wax removal, wax control, de-plugging.This device can utilize the oil well casing programme, and directly to the new technology of oil well energising heating, it can replace present oil field in recovery process, and that use any conventional recovered the oil is clear, wax control and method for removing blockage, and is better than the new equipment of any oil production technology.Key is that it has overcome a difficult problem in the existing conventional oil recovery technique, can guarantee the oil well ordinary production, improves the utilization rate of oil wells, reduces cost for oil production, reduces the oil recovery labor strength, improves oil well output and economic benefit.
The utility model is achieved in that this device is to be connected with O type joint 4 by the cable that power supply 1 is drawn, and is connected with sleeve pipe 7 critical pieces such as grade by down-hole short circuit anchor 8 by oil pipe 5, and forms a kind of oil well electric heater unit.And utilize its casing programme, and make tubing and casing constitute a complete galvanic circle, utilize the resistance of tubing and casing own simultaneously, the mode of heating of directly switching on is converted into heat energy with electric energy, and can obtain bigger heat.Its design formulas is:
Q=I
2RT10
-3(wh/km) wherein I is that electric current (A), R are that (Ω/m), T is conduction time (h) to the tubing and casing AC resistance.
Tubing and casing is constantly heated up, and then reach the purpose of oil well companion heat, wax control, wax removal and de-plugging.Its heating mechanism is a kelvin effect principle of utilizing alternating current, the after-current that is characterized in switching on only flows at the outer wall of oil pipe and the inwall of sleeve pipe, and the outer wall of the inwall of oil pipe and sleeve pipe does not have electric current to pass through, use this electrical heating new technology, flexible and convenient operation, production safety is reliable, reduces workman's physical labor intensity, improves heat energy utilization rate and high economic benefit.
Describe in detail in conjunction with the accompanying drawings and embodiments:
The utility model comprises power supply 1, insulating short section 2, insulating oil pipe hanger 3, O type joint 4, oil pipe 5, insulation centralizer 6, sleeve pipe 7, short circuit anchor 8.
In the accompanying drawing of oil well electric heater unit, 1 is power frequency or midfrequent AC power supply, and its output cable is introduced from casing flange and is connected with the bolt of O type joint 4, and linking to each other with sleeve pipe 7 parts such as grade by oil pipe 5 down-hole short circuit anchors 8 constitutes complete series circuit loop.Electric current is by casing flange bolt input power supply 1.Directly utilize tubing and casing conductor and resistance own to heat, utilize the collection skin to answer principle, make the tubing and casing heater produce a large amount of heat energy, the paraffin of tube inner wall knot can be fused and change its mobile performance.Can also play simultaneously the purpose that the companion is hot, prevent wax deposition.Sometimes also be used for de-plugging.Because of its electric current that passes through only flows along oil-pipe external wall and internal surface of sleeve pipe, and tube inner wall and sleeve outer wall do not have electric current to pass through, and insulating oil pipe hanger 3 and insulation centralizer 6 reliably insulate oil, sleeve pipe, and the sealed insulation pipe nipple reliably insulate oil pipe and production tree.Therefore, use this electrical heating method, oil well production is safe and reliable especially.
The utility model has the advantages that and adopt direct electrical heating method, the heat utilization rate height, equipment is few, and is simple in structure, small investment, cost of crude oil production is low, and utilization rate of oil wells height can improve oil output per well 2-4 doubly, thoroughly solves problem of environmental pollution. Reach and carry out production strictly in line with rules and regulations, easy to operate, safe and reliable, simultaneously, can reduce labor strength, remarkable in economical benefits again.
Claims (3)
1, a kind of oil well electric heater unit of forming by AC power 1, insulating oil pipe hanger 3, tubing centrilizer 6, short circuit anchor 8 and casing programme, it is characterized in that the cable that power supply 1 is drawn is connected with O type joint 4 usefulness bolts, conductor through oil pipe 5 links to each other with down-hole short circuit anchor 8, and constitutes the galvanic circle of connecting with sleeve pipe 7.The power supply other end is connected on the casing flange.
2, oil well electric heater unit according to claim 1: it is characterized in that power supply 1 is two kinds of power frequency or intermediate frequencies.O type joint 4 is the red copper material.Insulating oil pipe hanger 3 and sealed insulation pipe nipple 2 and insulation tubing centrilizer 6, all be glass-reinforced plastic material.
3, oil well electric heater unit according to claim 2: the tubing centrilizer 6 that it is characterized in that insulating is defined in a centralizer is installed on the every oil pipe at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210758 CN2095278U (en) | 1991-06-19 | 1991-06-19 | Electric heater for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210758 CN2095278U (en) | 1991-06-19 | 1991-06-19 | Electric heater for oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2095278U true CN2095278U (en) | 1992-02-05 |
Family
ID=50199435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91210758 Withdrawn CN2095278U (en) | 1991-06-19 | 1991-06-19 | Electric heater for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2095278U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063517C (en) * | 1996-09-24 | 2001-03-21 | 胜利石油管理局采油工艺研究院 | Oil pipe heating method and device |
| CN101163858B (en) * | 2005-04-22 | 2012-02-22 | 国际壳牌研究有限公司 | In situ conversion system producing hydrocarbon compound from stratum and related method |
| CN104373096A (en) * | 2014-10-29 | 2015-02-25 | 中国石油天然气股份有限公司 | Electric and steam integrated steam injection system and steam injecting method thereof |
| CN105178913A (en) * | 2015-08-05 | 2015-12-23 | 李宾飞 | Natural gas power generation electric heating wax removing and preventing device based on skin effect and application thereof |
| CN107339082A (en) * | 2017-07-28 | 2017-11-10 | 大庆科丰石油技术开发有限公司 | Well head kelvin effect electric heater unit |
| CN107642345A (en) * | 2016-07-21 | 2018-01-30 | 中国石油天然气股份有限公司 | High-pressure oil-gas well electric heating blocking-removing device and its method |
-
1991
- 1991-06-19 CN CN 91210758 patent/CN2095278U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063517C (en) * | 1996-09-24 | 2001-03-21 | 胜利石油管理局采油工艺研究院 | Oil pipe heating method and device |
| CN101163858B (en) * | 2005-04-22 | 2012-02-22 | 国际壳牌研究有限公司 | In situ conversion system producing hydrocarbon compound from stratum and related method |
| CN104373096A (en) * | 2014-10-29 | 2015-02-25 | 中国石油天然气股份有限公司 | Electric and steam integrated steam injection system and steam injecting method thereof |
| CN105178913A (en) * | 2015-08-05 | 2015-12-23 | 李宾飞 | Natural gas power generation electric heating wax removing and preventing device based on skin effect and application thereof |
| CN107642345A (en) * | 2016-07-21 | 2018-01-30 | 中国石油天然气股份有限公司 | High-pressure oil-gas well electric heating blocking-removing device and its method |
| CN107339082A (en) * | 2017-07-28 | 2017-11-10 | 大庆科丰石油技术开发有限公司 | Well head kelvin effect electric heater unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |