CN203810700U - Electric heater for oil-field steam injection operation - Google Patents
Electric heater for oil-field steam injection operation Download PDFInfo
- Publication number
- CN203810700U CN203810700U CN201420076267.4U CN201420076267U CN203810700U CN 203810700 U CN203810700 U CN 203810700U CN 201420076267 U CN201420076267 U CN 201420076267U CN 203810700 U CN203810700 U CN 203810700U
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- electric heater
- mixed flow
- oil
- injection operation
- tube
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Abstract
The utility model provides an electric heater for oil-field steam injection operation. The electric heater for oil-field steam injection operation comprises an outer-layer preheating pipe and an inner-layer mixed-flow pipe, the two of which are orderly nested in a housing from outside to inside, a middle-layer heating pipe arranged in an annular space between the outer-layer preheating pipe and the inner-layer mixed-flow pipe, a first opening formed between the outer-layer preheating pipe and the second end of the housing and a third opening formed between the first end of the inner-layer mixed-flow pipe and the first end of the housing, a preheating chamber formed by an annular space between the housing and the outer-layer preheating pipe, a heating chamber formed by an annular space between the outer-layer preheating pipe and the inner-layer mixed flow pipe, a mixed flow chamber formed by the internal pipe cavity of the inner-layer mixed flow pipe, a roundabout heating channel which goes into the preheating chamber from an oil inlet, goes into the heating chamber as being bent for the first time and goes into the mixed flow chamber as being bent again by virtue of the third opening, and finally leaves the mixed flow chamber from an oil outlet.
Description
Technical field
The utility model relates to oil recovery machiner field, belongs to a kind of in the steam injection operation of oilfield exploitation, for heating the electric heater of injection boiler fuel oil used, in particular to a kind of electric heater for oil field gas injection operation.
Background technology
In oil field gas injection operation, injection boiler adopts fuel oil as fuel, to produce heat energy.In oil field, especially the comparatively cold area of weather, injection boiler adopts fuel oil to keep liquid through heating, could form the required continuous supply of steam injection operation, thereby, before entering into injection boiler, often by electric heater, fuel oil is heated fuel oil.
Existing electric heater generally adopts traditional electrical heating wire, according to pyroelectric effect, carries out heat temperature raising after energising, and the mode by forced convertion heats medium.Electric heater body internal structure is single backhaul, tubulose through type, and medium enters heating chamber from entrance, after heating, by outlet, is flowed out, and the dielectric heating time is short, and temperature rise is little, the thermal efficiency is low.
And existing heating tube directly contacts with heat medium, at inflammable and explosive medium and place, use, do not meet safety and environmental protection requirement.When rate-of flow reduces or stop, can cause heated medium temperature sharply to raise, overpressure rises and there will be flange thorn leakage, scald and fire incident.When heater damages replacing heating tube, must carry out pipeline purging to technological process, impact is produced, and easily pollutes.
And then in use, when a local damage wherein, whole heating core just can not be used existing heating tube, must all change, maintenance cost is higher.
Utility model content
The utility model provides a kind of electric heater for oil field gas injection operation, and short to solve the existing electric heater dielectric heating time, temperature rise is little, the thermal efficiency is low, is difficult to meet the problem of injection boiler needs.The utility model also will solve existing heating tube and directly contact with heat medium, at inflammable and explosive medium and place, uses, and does not meet the problem of safety and environmental protection requirement.The utility model also will solve heating tube and in maintenance, need whole replacings, the problem that maintenance cost is higher.
For this reason, the utility model proposes a kind of electric heater for oil field gas injection operation, the described electric heater for oil field gas injection operation comprises:
Shell;
End plate, is arranged on the first end of described shell;
Be nested in successively from outside to inside outer economizer bank and internal layer mixed flow tube in described shell;
Middle level heating tube, is arranged in the annular space between described outer economizer bank and internal layer mixed flow tube;
Described outer economizer bank and described middle level heating tube are tightly connected with described end plate respectively, and between the second end of described outer economizer bank and described shell, be provided with the first opening, between the first end of described internal layer mixed flow tube and the first end of described shell, be provided with the 3rd opening;
Preheating chamber, is formed by the annular space between described shell and described outer economizer bank;
Heating clamber, is formed by the annular space between described outer economizer bank and described internal layer mixed flow tube;
Mixed flow chamber, is formed by the interior lumen of internal layer mixed flow tube;
Oil-in, is arranged on described shell, and described oil-in connects described preheating chamber;
Oil export, connects described mixed flow chamber;
Roundabout heat tunnel, enters into described preheating chamber from described oil-in, enters described heating clamber through turning back for the first time, then through described the 3rd opening, again turns back and enters described mixed flow chamber, from oil export, leaves described mixed flow chamber.
Further, described middle level heating tube comprises: the heating tube of a plurality of parallel connections.
Further, between the second end of described middle level heating tube and described shell, be provided with the second opening, described roundabout heat tunnel is turned back for the first time from described the first opening and described the second opening.
Further, each heating tube comprises: nichrome resistance wire, be set in stainless steel tube outside described nichrome resistance wire, be filled in the insulating barrier between described nichrome resistance wire and described stainless steel tube, described insulating barrier is formed between described nichrome resistance wire and described stainless steel tube through extruding by magnesia powder.
Further, the described electric heater for oil field gas injection operation is connected with injection boiler, and described shell is arranged on described working face in the mode of accumbency.
Further, the described electric heater for oil field gas injection operation also comprises: the anti-explosion terminal box being connected with described each heating tube.
Further, described heating tube is provided with overtemperature protection sensor.
Further, the second end of described internal layer mixed flow tube passes the second end of described shell, and described oil export is arranged on the second end of described internal layer mixed flow tube.
Further, the length of described shell is 1200mm, and the length of outer economizer bank is 1190mm, and the length of described internal layer mixed flow tube is 1400mm, and the stroke of described roundabout heat tunnel is 3590mm, and the length of described middle level heating tube is 1190mm.
By heat medium, the track route in the heating cavity of electric heater becomes the walking of turning back to the utility model, make heated medium add the roundabout heat tunnel of thermosetting by three backhauls, in the situation that heating tube length is constant, the heated length of medium has increased twice, extend the heat time of medium, greatly improved heat exchange efficiency.
And then, the utility model is separated with heat medium by heating element heater (nichrome resistance wire or comprise the stainless steel tube outside nichrome resistance wire, insulating barrier and insulating barrier), design is installed isolation pillar outward additional at stainless steel tube, realizes dielectric separation, increases security.Isolation pillar surface thermal load is little, heating is even, can not produce medium coking, carbon distribution phenomenon, has extended the service life of electric heater.
Change heating tube into through type single heating tube, reduce the surface thermal load of single heating tube, when heating tube wherein damages, can change separately, time saving and energy saving, maintenance cost is low.When heating tube damages, can singlely change, maintenance does not need pipeline purging, can repair online, and the repair time shortens greatly, has guaranteed the continous-stable of producing, the pollution having caused while having avoided pipeline purging.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of main apparent direction of the electric heater for oil field gas injection operation of the utility model embodiment;
Fig. 2 is the cross-sectional view of radial direction of electric heater of the oil field gas injection operation of the utility model embodiment.
Drawing reference numeral explanation:
1, shell 11, oil-in 13, oil export 15, heat-insulation layer 12, the first opening 14, the second opening 16, the 3rd opening 2, preheating chamber 3, outer economizer bank 4, heating clamber 5, middle level heating tube 6, end plate 7, internal layer mixed flow tube 8, mixed flow chamber 90, overtemperature protection sensor 110, anti-explosion terminal box 120, binding post
The specific embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing the specific embodiment of the present utility model is described.
Fig. 1 shows the sectional structure of main apparent direction of the electric heater for oil field gas injection operation of the utility model embodiment; Fig. 2 shows the cross-section structure of radial direction of electric heater of the oil field gas injection operation of the utility model embodiment.As depicted in figs. 1 and 2, the electric heater for oil field gas injection operation of the utility model embodiment comprises:
Shell 1, shell 1 can be the tubular construction of various existing cavitys, for example shell 1 is tubulose, is coated with heat-insulation layer 15 on shell 1, to increase heat insulation effect;
End plate 6, is arranged on the first end of described shell 1, and as Fig. 1, the present embodiment be take left end as first end, take right-hand member as the second end;
Be nested in successively from outside to inside outer economizer bank 3 and internal layer mixed flow tube 7 in described shell 1, outer economizer bank 3 and internal layer mixed flow tube 7 are tubulose, outer economizer bank 3 is nested in shell 1, internal layer mixed flow tube 7 is nested in outer economizer bank 3, between outer economizer bank 3 and internal layer mixed flow tube 7, forms annular space;
Middle level heating tube 5, plays the effect of heat medium, is arranged in the annular space between described outer economizer bank 3 and internal layer mixed flow tube 7;
Described outer economizer bank 3 and described middle level heating tube 5 are tightly connected with described end plate 6 respectively, and between the second end of described outer economizer bank and described shell (right-hand member in Fig. 1), be provided with the first opening 12, between the first end of described internal layer mixed flow tube 7 and the first end of described shell 1, be provided with the 3rd opening 16;
Preheating chamber 2, is formed by the annular space between described shell 1 and described outer economizer bank 3;
Heating clamber 4, is formed by the annular space between described outer economizer bank 3 and described internal layer mixed flow tube 7, and middle level heating tube 5 is arranged in heating clamber 4, plays the effect of heat medium;
Mixed flow chamber 8, is formed by the interior lumen of internal layer mixed flow tube 7;
Oil-in 11, is arranged on described shell 1, for example, be arranged on the left end of shell 1, and described oil-in 11 connects described preheating chamber 2;
Oil export 13, connects described mixed flow chamber 8;
Roundabout heat tunnel, as the direction of arrow of Fig. 1, from described oil-in 11, enter into described preheating chamber 2, through turning back for the first time, enter described heating clamber 4, then through described the 3rd opening 16, again turn back and enter described mixed flow chamber 8, from oil export 13, leave described mixed flow chamber 8.As Fig. 2, oil-in 11 is arranged on the left end of shell 1, when fuel oil enters into the electric heater for oil field gas injection operation of the utility model embodiment, fuel oil enters into described preheating chamber 2 from left to right from described oil-in 11, while arriving the right-hand member of preheating chamber 2, from the first opening 12 inwardly and flow into heating clamber 4, complete turning back for the first time from right to left left; When fuel oil arrives the left end of heating clamber 4, from the 3rd opening 16, inwardly also flow into the right in the interior lumen of internal layer mixed flow tube 7, enter into mixed flow chamber 8, complete again turning back from left to right, then from connecting the oil export 13 of described mixed flow chamber 8, flow out; While turning back, the flow direction of heated medium (fuel oil) has all been made the change of 180 degree at every turn.Further, the second end of described internal layer mixed flow tube passes the second end of described shell, and described oil export 13 is arranged on the second end of described internal layer mixed flow tube 7.Like this, can realize the flow process of longer heat medium.
Pressure, the viscosity of the fuel oil adopting in view of injection boiler, the utility model adopts the heating cavity of three backhauls, realize turning back of twice heated medium, if number of turns increases, increased on the one hand the inside complexity of electric heater, on the other hand, because the flow direction of the heated medium (fuel oil) of turning back has all been made 180 changes of spending, can increase the flow resistance of heated medium, in the situation that the fuel pressure providing do not become, to the supply of injection boiler fuel feeding, can not reach requirement.
By heat medium, the track route in heating cavity becomes the walking of turning back to the utility model, for example, in the situation that heating tube length is constant (being 1190mm or 1200mm), the heated length of medium has improved twice or twice left and right (for example can increase to 3590mm) substantially, extend the heat time of medium, greatly improved heat exchange efficiency.
And, middle level heating tube 5 or heating clamber 4 are between preheating chamber 2 and mixed flow chamber 8, these two stages that enter into electric heater and leave electric heater at heat medium, heat conduction between main outer layer economizer bank 3, described internal layer mixed flow tube 7 and heat medium, plays respectively the effect of preheating and mixing soaking; In stage at heat medium in heating clamber 4, because heating clamber 4 is between preheating chamber 2 and mixed flow chamber 8, the heat that heating clamber 4 provides can be passed to respectively preheating chamber 2 and mixed flow chamber 8 rapidly in the mode of radially conducting, preheating chamber 2 can directly obtain with mixed flow chamber 8 heat that heating clamber 4 provides, thereby the soaking or the mixed hot function that have realized the function of rapidly pre-warming and kept for a long time higher temperature.So, the design of this structure, heat medium temperature rise is fast, and the thermal efficiency is higher, is convenient to the quick use of injection boiler.
Further, as shown in Figure 2, described middle level heating tube 5 comprises: the heating tube 51 of a plurality of parallel connections.When a heating tube damages, do not affect the work of other heating tube, realize the on-bne repair of heating tube and replacing, can not affect the work of injection boiler.As shown in Figure 2, middle level heating tube 5 comprises: 12 heating tubes in parallel 51, every heating tube has independently binding post 120, plays the effect that single heating tube divides body running, by anti-explosion terminal box 110 by 12 independently heating tube connect.In addition, this split design of middle level heating tube 5 has increased total heat exchange area of heat-generating pipe, has further reduced the surface thermal load of single heating tube, has increased the service life of single heating tube.
Fuel oil or heat medium enter into described preheating chamber 2 from left to right from described oil-in 11, while arriving the right-hand member of preheating chamber 2, from the first opening 12 inwardly and flow into heating clamber 4, complete turning back for the first time from right to left left; When middle level heating tube 5 comprises the heating tube of a plurality of parallel connections, can between middle level heating tube 5 and the second end of described shell 1, be provided with the second opening 14; In addition, can make does not have opening or spacing between middle level heating tube 5 and the second end of described shell 1 yet, makes to be connected or to pass between the second end of middle level heating tube 5 and described shell 1 the second end of shell 1.
When being provided with the second opening 14 between middle level heating tube 5 and the second end of described shell 1, described roundabout heat tunnel can also be turned back for the first time from described the first opening 12 and described the second opening 14, be that heat medium enters into heating clamber 4 through described the first opening 12 and described the second opening 14 successively, turn back for the first time, like this, the effect of turning back is better, has increased the flow process of heat medium.
Further, each heating tube 51 comprises: nichrome resistance wire, be set in stainless steel tube outside described nichrome resistance wire, be filled in the insulating barrier between described nichrome resistance wire and described stainless steel tube, described insulating barrier is formed between described nichrome resistance wire and described stainless steel tube through extruding by magnesia powder.The selected tempering resistance wire of replacing conventional electric heater with nichrome resistance wire.The ordinary carbon steel heating tube of conventional electric heater is replaced with to stainless steel heating tube, make heating tube there is higher high temperature resistant and non-oxidizability.Fill in magnesia powder process by machine high-pressure extrusion, make insulant between heater strip and stainless steel tube fill tightr, make 300 ℃-400 ℃ of heating core (nichrome resistance wire) operating temperatures of the higher electric heater of heat transfer efficiency, and the outermost preheating chamber normal working temperature of heating chamber is 70-80 ℃.Except this three-decker of nichrome resistance wire, insulating barrier and stainless steel tube, the utility model is in addition sheathed stainless steel isolation pillar outside stainless steel tube also, the outer stainless steel isolation pillar that is also arranged with of each heating tube 51 in other words with three-decker, better to isolate nichrome resistance wire and heat medium.The rock cotton board heat-insulation layer that shell 1 outsourcing 5cm is thick, external application 0.5mm galvanized iron sheet parcel, is down to below 50 ℃ electric heater appearance temperature.
Further, the described electric heater for oil field gas injection operation is connected with injection boiler, and electric heater is connected with (oil) pump, and (oil) pump is supplied heat medium (fuel oil) to electric heater.As shown in Figure 1, described shell is arranged on described working face in the mode of accumbency.Namely, the turning back for level of flowing of heat medium, like this, can reduce to the pressure of the pump of electric heater supply heat medium (fuel oil), electric heater of the present utility model can be realized and being connected easily with pump and injection boiler at the scene, without changing pump and injection boiler, without change site technique.
Further, the described electric heater for oil field gas injection operation also comprises: the anti-explosion terminal box being connected with described each heating tube.Heating tube binding post at electric heater is outside, installs and adopts the anti-explosion terminal box that national explosion-proof criteria grade is EXe II T3.Connection cable, through the locknut turnover of anti-explosion terminal box, is connected with every heating tube binding post in box inside.Prevent that junction from producing spark, thereby reach the object of safe wiring.
Further, described heating tube (for example, stainless steel isolation pillar) is provided with overtemperature protection sensor 90.At stainless steel isolation pillar outer surface welding overtemperature protection sensor, heating tube hull-skin temperature is played to superheat protecting function, prevent that dry combustion method from damaging heating tube.When heater element overtemperature, the independently overtemperature protection system of heater element cuts off heating power supply immediately, avoids heat medium overtemperature to cause coking, rotten, carbonization.
The manufacturing process of the electric heater for oil field gas injection operation of the present utility model is:
The cavity of electric heater adopts nested cascaded structure to form by three seamless pipes, and shell 1 is of a size of ∮ 219mm * 6mm; L:1200mm, outer economizer bank 3 is of a size of ∮ 159mm * 6mm; L:1190mm; Internal layer mixed flow tube 7 is of a size of ∮ 76mm * 4mm; L:1400; Middle level heating tube 5 is by 12 ∮ 18mm * 1.5mm; The single heating tube of L:1190mm penetrates ∮ 25mm * 3mm; The stainless steel isolation pillar of L:1150mm (the long single heating tube of 1190mm stretches out a part to end plate 6, to pierce in the stainless steel isolation pillar of 1150mm), matched in clearance forms.The total kilometres of roundabout heat tunnel, that is: refueling flow through from outside to inside total heating stroke of three layers of sleeve pipe of medium is 3 times of one way heating tube heating mode.For example the length of shell 1 is 1200mm, wall thickness 10mm, because the total kilometres of roundabout heat tunnel equal the stroke of the one-stroke heating of three times, 3 times that always heat stroke and be 1200mm deduct wall thickness 10mm, actual for 3590mm or be 3 times of length of shell 1 substantially.
When heating tube comprises: nichrome resistance wire, insulating barrier, stainless steel tube and while being set in stainless steel outside stainless steel tube isolation pillar, stainless steel tube is equidistantly welded on end face substrate fixing, and be placed in each stainless steel isolation pillar of middle level heating tube, fixing with the strengthening of twice card, every heating tube is established independent electric binding terminal, can single operation penetrate and extract out stainless steel tube.Every meter of power of electric heating tube is adjusted to 1.8kw.
Table 1 is for the performance parameter table of the electric heater of oil field gas injection operation
The heating cavity of three backhauls of the present utility model extends walking length and the heat time of heat medium in cavity, on average heats temperature rise and can reach 50 ℃, and the thermal efficiency can reach 96%.
The resistance wire of heating tube installs stainless steel tube outward additional, realizes dielectric separation, and pillar surface thermal load is little, heating is even, can not produce medium coking, carbon distribution phenomenon, has extended the service life of electric heater.
When heating tube damages, can singlely change, maintenance does not need pipeline purging, can repair online, and the repair time shortens greatly, has guaranteed the continous-stable of producing, the pollution having caused while having avoided pipeline purging.In use temperature rise is fast, and injection boiler can be gone into operation in time, and heating function is stable, little on steam injection parameter impact, has improved steam injection service quality.
The foregoing is only the schematic specific embodiment of the utility model, not in order to limit scope of the present utility model.For each part of the present utility model can mutually combine under the condition of not conflicting; any those skilled in the art; do not depart from equivalent variations and the modification of having done under the prerequisite of design of the present utility model and principle, all should belong to the scope of the utility model protection.
Claims (9)
1. for an electric heater for oil field gas injection operation, it is characterized in that, the described electric heater for oil field gas injection operation comprises:
Shell;
End plate, is arranged on the first end of described shell;
Be nested in successively from outside to inside outer economizer bank and internal layer mixed flow tube in described shell;
Middle level heating tube, is arranged in the annular space between described outer economizer bank and internal layer mixed flow tube;
Described outer economizer bank and described middle level heating tube are tightly connected with described end plate respectively, and between the second end of described outer economizer bank and described shell, be provided with the first opening, between the first end of described internal layer mixed flow tube and the first end of described shell, be provided with the 3rd opening;
Preheating chamber, is formed by the annular space between described shell and described outer economizer bank;
Heating clamber, is formed by the annular space between described outer economizer bank and described internal layer mixed flow tube;
Mixed flow chamber, is formed by the interior lumen of internal layer mixed flow tube;
Oil-in, is arranged on described shell, and described oil-in connects described preheating chamber;
Oil export, connects described mixed flow chamber;
Roundabout heat tunnel, enters into described preheating chamber from described oil-in, enters described heating clamber through turning back for the first time, then through described the 3rd opening, again turns back and enters described mixed flow chamber, from oil export, leaves described mixed flow chamber.
2. the electric heater for oil field gas injection operation as claimed in claim 1, is characterized in that, described middle level heating tube comprises: the heating tube of a plurality of parallel connections.
3. the electric heater for oil field gas injection operation as claimed in claim 2, it is characterized in that, between the second end of described middle level heating tube and described shell, be provided with the second opening, described roundabout heat tunnel is turned back for the first time from described the first opening and described the second opening.
4. the electric heater for oil field gas injection operation as claimed in claim 1, it is characterized in that, each heating tube comprises: nichrome resistance wire, be set in stainless steel tube outside described nichrome resistance wire, be filled in the insulating barrier between described nichrome resistance wire and described stainless steel tube, described insulating barrier is formed between described nichrome resistance wire and described stainless steel tube through extruding by magnesia powder.
5. the electric heater for oil field gas injection operation as claimed in claim 1, is characterized in that, the described electric heater for oil field gas injection operation is connected with injection boiler, and described shell is arranged on working face in the mode of accumbency.
6. the electric heater for oil field gas injection operation as claimed in claim 2, is characterized in that, the described electric heater for oil field gas injection operation also comprises: the anti-explosion terminal box being connected with described each heating tube.
7. the electric heater for oil field gas injection operation as claimed in claim 3, is characterized in that, described heating tube is provided with overtemperature protection sensor.
8. the electric heater for oil field gas injection operation as claimed in claim 1, is characterized in that, the second end of internal layer mixed flow tube passes the second end of described shell, and described oil export is arranged on the second end of described internal layer mixed flow tube.
9. the electric heater for oil field gas injection operation as claimed in claim 8, it is characterized in that, the length of described shell is 1200mm, the length of outer economizer bank is 1190mm, the length of described internal layer mixed flow tube is 1400mm, the stroke of described roundabout heat tunnel is 3590mm, and the length of described middle level heating tube is 1190mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076267.4U CN203810700U (en) | 2014-02-21 | 2014-02-21 | Electric heater for oil-field steam injection operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076267.4U CN203810700U (en) | 2014-02-21 | 2014-02-21 | Electric heater for oil-field steam injection operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203810700U true CN203810700U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420076267.4U Expired - Fee Related CN203810700U (en) | 2014-02-21 | 2014-02-21 | Electric heater for oil-field steam injection operation |
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| Country | Link |
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| CN (1) | CN203810700U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832727A (en) * | 2021-01-15 | 2021-05-25 | 栾云 | Underground ignition and oil displacement method using coiled tubing to carry electromagnetic wave heating system |
-
2014
- 2014-02-21 CN CN201420076267.4U patent/CN203810700U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832727A (en) * | 2021-01-15 | 2021-05-25 | 栾云 | Underground ignition and oil displacement method using coiled tubing to carry electromagnetic wave heating system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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