CN209212223U - Mobile electric igniter - Google Patents

Abstract

The utility model provides a kind of mobile electric igniter, comprising: heating mechanism and gas supply mechanism.Heating mechanism, include: inner hollow and the igniter inner tube of underground end opening and is sheathed on the igniter inner tube external igniters outer tube, and the first cable conductor and the second cable conductor of mutually insulated, it is extended between the igniter inner tube and the igniter outer tube, and the downhole end of first cable conductor and the downhole end of the second cable conductor are electrically connected by heater strip；Gas supply mechanism, comprising: the first gas injecting pipe, via the gas injection entrance opened up on the gas injection tube column, the space between the gas injection tube column and the igniter outer tube is connected to；Second gas injecting pipe is connected to via the ground surface end of the igniter inner tube with the inside of the igniter inner tube.It can be improved the heat exchange efficiency during igniting by double air supply channels that the first gas injecting pipe and the second gas injecting pipe are formed.

Description

Mobile electric igniter

Technical field

The utility model relates to technical field of petroleum extraction more particularly to a kind of mobile electric igniters.

Background technique

Fireflood technique is the important conversion regime of oil-field thick-oil development late stage.It is currently used movable type electric igniter due to It is limited by the structure, haves the shortcomings that heat transfer efficiency is low, moreover, during its igniting, thermometric, the complex process for surveying pressure, measurement Higher cost.

Utility model content

In view of this, the present invention provides a kind of mobile electric igniters, to improve the heat exchange efficiency during igniting, The complexity and cost for reducing thermometric, surveying pressure.

To achieve the goals above, the utility model uses following scheme:

According to an embodiment of the present invention, mobile electric igniter, comprising:

Heating mechanism, comprising: igniter inner tube, inner hollow and underground end opening；Igniter outer tube is sheathed on described Outside igniter inner tube；It is closed between the downhole end of the igniter inner tube and the downhole end of the igniter outer tube by end socket Connection；The underground part of the igniter outer tube passes through igniting sealer and the note for being sheathed on inside gas injection tube column The uphole end of tracheae column is tightly connected；The first cable conductor and the second cable conductor of mutually insulated, are extended in the point Between firearm inner tube and the igniter outer tube, and the downhole end of the downhole end of first cable conductor and the second cable conductor It is electrically connected by heater strip；The ground surface end of first cable conductor and the ground surface end of second cable conductor are for connecting electricity Source；

Gas supply mechanism, comprising: the first gas injecting pipe, via the gas injection entrance opened up on the gas injection tube column, with the note Space connection between tracheae column and the igniter outer tube；Second gas injecting pipe, via the ground surface end of the igniter inner tube It is connected to the inside of the igniter inner tube.

According to an embodiment of the present invention, the heater strip, including along the igniter inner tube it is axially extending first The first end of heater strip section and the second heater strip section, the first end of the first heater strip section and the second heater strip section respectively with institute The downhole end for stating the first cable conductor is connected with the downhole end of the second cable conductor, the second end of the first heater strip section and The second end of two heater strip sections is connected by the annular-heating silk line circumferentially extended along the igniter inner tube.

According to an embodiment of the present invention, further includes: gas injection distributor, for distributing the gas of same gas source to institute State the first gas injecting pipe and second gas injecting pipe.

According to an embodiment of the present invention, further includes: the ground surface end of measuring mechanism and the sealing igniter inner tube Sealing mechanism；The measuring mechanism includes temperature measuring equipment or pressure measuring unit, wears the inside of the igniter inner tube, and one end The outside of the igniter inner tube is reached across the sealing mechanism.

According to an embodiment of the present invention, the temperature measuring equipment includes the thermometric for wearing the inside of the igniter inner tube The temperature sensor of line and the downhole end for being set to the thermometric line；The pressure measuring unit includes wearing the igniter inner tube Internal capillary.

According to an embodiment of the present invention, the sealing mechanism includes sealer and the ground surface end for allowing the thermometric line Or the seal cap that passes through of the ground surface end of the capillary and sealing ring；One end of sealer connects the ground of the igniter inner tube End, the other end are provided with the groove for allowing the ground surface end of the thermometric line or the ground surface end of the capillary to pass through；The sealing Ring taps is set to the groove, and the sealed cap is set to the notch of the groove.

According to an embodiment of the present invention, described in the downhole end stretching of the downhole end of the thermometric line or the capillary The downhole end of igniter inner tube reaches the middle part for being set to the screen casing of the gas injection tube column.

According to an embodiment of the present invention, the heating mechanism further include: centralizing bracket is set to the igniter inner tube Downhole end on the inside of, for limiting the position of the downhole end of the thermometric line or the downhole end of the capillary.

According to an embodiment of the present invention, the heating mechanism further include: insulator and sealant；The insulator is filled out It fills and is set between the igniter inner tube and the igniter outer tube, so that first cable conductor and second cable Cable core mutually insulated；The sealant is filled with the ground in the space between the igniter inner tube and the igniter outer tube End.

According to an embodiment of the present invention, further includes: be set between the gas injection entrance and the igniting sealer Preventer and guider for assisting the heating mechanism to go into the well.

According to an embodiment of the present invention, further includes: the casing being sheathed on outside the gas injection tube column and two packings Device；It is set to the neighbouring screen casing for being set to the gas injection tube column of collar aperture of described sleeve pipe；Described two packers block setting In described sleeve pipe hole and the axial two sides along described sleeve pipe of the screen casing.

According to an embodiment of the present invention, the gas injection distributor includes triple valve.

The mobile electric igniter of the utility model, by being connected to outside gas injection tube column and igniter using the first gas injecting pipe Space between pipe sets hollow for the inside of igniter inner tube, and utilizes the second gas injecting pipe connection igniter inner tube Inside is capable of forming the air supply channel that two-way leads to the neighbouring oil reservoir in gas injection tube column bottom, and by by the first of mutually insulated Cable conductor and the second cable conductor are extended between igniter inner tube and igniter outer tube, and heater strip are connected to two The downhole end of root cable conductor can make the gas from two-way air supply channel reach oil reservoir inside and outside heater strip respectively Near, with this, the contact area of heater strip and gas can be increased, to improve the heat exchange efficiency during igniting.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:

Fig. 1 is the structural schematic diagram of the mobile electric igniter of an embodiment of the present invention；

Fig. 2 is the enlarged structure schematic diagram of the above ground portion of movable type electric igniter shown in Fig. 1；

Fig. 3 is the enlarged structure schematic diagram of the underground part of movable type electric igniter shown in Fig. 1；

Fig. 4 is section structure diagram of the underground part along line A-A of movable type electric igniter shown in Fig. 3；

Fig. 5 is section structure diagram of the underground part along line B-B of movable type electric igniter shown in Fig. 3.

Specific embodiment

It is right with reference to the accompanying drawing for the objectives, technical solutions, and advantages of the embodiments of the present invention are more clearly understood The utility model embodiment is described in further details.Here, the illustrative embodiments and their description of the utility model are for solving The utility model is released, but is not intended to limit the scope of the present invention.

Fig. 1 is the structural schematic diagram of the mobile electric igniter of an embodiment of the present invention.Fig. 2 is moved shown in Fig. 1 The enlarged structure schematic diagram of the above ground portion of formula electric igniter.Fig. 3 is putting for the underground part of movable type electric igniter shown in Fig. 1 Big structure schematic diagram.Referring to Fig. 1 to Fig. 3, the mobile electric igniter of some embodiments can include: heating mechanism and air feeder Structure.

Wherein, heating mechanism, it may include: igniter inner tube 9, igniter outer tube 13, first the 101, second electricity of cable conductor Cable cable core 102 etc..The inner hollow of igniter inner tube 9, and the underground end opening of the igniter inner tube 9, for example, can be both ends The steel pipe of opening.Igniter outer tube 13 is sheathed on outside the igniter inner tube 9, for example, can coaxially be set-located.Institute It states by the closing connection of end socket 29 between the downhole end of igniter inner tube 9 and the downhole end of the igniter outer tube 13, at this point, institute 9 bottom opening of igniter inner tube is stated, and sealed bottom can be formed between the igniter inner tube 9 and the igniter outer tube 13 Cavity.The underground part of the igniter outer tube 13 passes through igniting sealer 18 for being sheathed on inside gas injection tube column 23 It is tightly connected with the uphole end of the gas injection tube column 23.The gas injection tube column 23 can be real using the embodiment of existing gas injection tube column Existing, which can be realized using the embodiment of existing igniting sealer.

102 mutually insulated of first cable conductor 101 and the second cable conductor, for example, can be by between two core wires Megohmite insulant is filled, or by wrapping up each core wire respectively using insulation sheath, is realized exhausted between two cable conductors Edge.First cable conductor 101 and second cable conductor 102 are extended in the igniter inner tube 9 and the igniter Between outer tube 13, for example, first cable conductor 101 and second cable conductor 102 can be along the igniter inner tubes 9 Heart line concurrently extends to the other end by one end of the igniter outer tube 13 (outside of igniter inner tube 9).Moreover, described first The downhole end of cable conductor 101 and the downhole end of the second cable conductor 102 are electrically connected by heater strip 26.With electric igniter to Underground is put into, and it is attached that the downhole end of the downhole end of first cable conductor 101 and the second cable conductor 102 generally can reach oil reservoir Close position.Heater strip 26 generally has high electrical resistance, will add when by the first cable conductor 101 and the second cable conductor 102 After heated filament 26 is connected to the two poles of the earth of power supply, by regulating power source voltage, the temperature of heater strip 26 can be made quickly to increase electric igniter Required igniting heating temperature.The ground surface end of the ground surface end of first cable conductor 101 and second cable conductor 102 For connecting power supply, specifically, the ground surface end of the ground surface end of first cable conductor 101 and second cable conductor 102 It can be extracted from the ground surface end of the igniter outer tube 13 (outside of igniter inner tube 9), be conveniently connected to power supply.

Gas supply mechanism, comprising: the first gas injecting pipe and the second gas injecting pipe.First gas injecting pipe, via the air injection pipe The gas injection entrance 16 opened up on column 23, the space between the gas injection tube column 23 and the igniter outer tube 13 are connected to, with this, Source gas can enter the channel between the gas injection tube column 23 and the igniter outer tube 13 from gas injection entrance 16, reach oil Near layer, to realize an air supply channel.Second gas injecting pipe, ground surface end and the point via the igniter inner tube 9 The inside of firearm inner tube 9 is connected to, and with this, source gas can enter in igniter inner tube 9 from the ground surface end of igniter inner tube 9 Portion, and the downhole end of igniter inner tube 9 is reached, it reaches near oil reservoir, to realize another air supply channel.Two air supply channels In gas respectively from the two sides of the first cable conductor 101 and the second cable conductor 102 reach oil reservoir near, with this, Neng Gouchong Divide and utilizes heat caused by heater strip.

It, will by the space being connected to using the first gas injecting pipe between gas injection tube column and igniter outer tube in the present embodiment The inside of igniter inner tube is set as hollow, and using the inside of the second gas injecting pipe connection igniter inner tube, is capable of forming two Lead to the air supply channel of oil reservoir near gas injection tube column bottom on road, and by the way that the first cable conductor of mutually insulated and second is electric Cable cable core is extended between igniter inner tube and igniter outer tube, and heater strip is connected to the underground of two cable conductors End, can make the gas from two-way air supply channel respectively inside and outside heater strip reach oil reservoir near, with this, Neng Gouzeng Add the contact area of heater strip and gas, to improve the heat exchange efficiency during igniting.

Fig. 4 is section structure diagram of the underground part along line A-A of movable type electric igniter shown in Fig. 3.Fig. 5 is Fig. 3 Section structure diagram of the underground part of shown movable type electric igniter along line B-B.In conjunction with Fig. 3 to Fig. 5, in some embodiments In, the heater strip 26 may include the first heater strip section and second heater strip section axially extending along the igniter inner tube 9.It should First heater strip section and the second heater strip section can be the straight length portion of heater strip 26 shown in Fig. 3.First heating Silk section first end and the second heater strip section first end respectively with the downhole end and the second cable of first cable conductor 101 The downhole end of cable core 102 connects, and the second end of the second end of the first heater strip section and the second heater strip section passes through along described The annular-heating silk line 28 that igniter inner tube 9 circumferentially extends connects.The heater strip line 28 can be to be semicircle or round, such as Shown in Fig. 5.

Referring back to Fig. 1, in some embodiments, mobile electric igniter may include gas injection distributor 15, and being used for will be same The gas of gas source is distributed to first gas injecting pipe and second gas injecting pipe.In specific embodiment, the gas injection distributor 15 may include triple valve.The adjustable source gas flow of the triple valve is adjustable into first air injection pipe The gas flow in road and/or second gas injecting pipe.

Referring back to Fig. 1, in some embodiments, mobile electric igniter can include: measuring mechanism and the sealing igniting The sealing mechanism of the ground surface end of device inner tube 9.The measuring mechanism may include temperature measuring equipment or pressure measuring unit, when needing thermometric, The measuring mechanism includes temperature measuring equipment, and when needing to survey pressure, which includes pressure measuring unit.The temperature measuring equipment or the survey pressure Device wears the inside of the igniter inner tube 9, and one end of the temperature measuring equipment or the pressure measuring unit passes through the sealing mechanism Reach the outside of the igniter inner tube 9.The outside that the temperature measuring equipment exposes igniter inner tube 9 can connect to display device, Temperature during display igniting, the outside which exposes igniter inner tube 9 can be in order to the pressure during point of observation fire.

In specific embodiment, referring back to Fig. 1 and Fig. 3, the temperature measuring equipment may include wear the igniter inner tube 9 interior The temperature sensor 30 of the thermometric line 3 in portion and the downhole end for being set to the thermometric line 3.The thermometric line 3 for example can be thermoelectricity It is even.The pressure measuring unit may include the capillary (not shown) for wearing the inside of the igniter inner tube 9.It lights a fire when needing to measure When the pressure of period, thermometric line 3 can be taken out, be changed to capillary.Moreover, working as thermometric line 3, temperature sensor 30 or capillary When pipe damages, it can take out and be replaced.

In more specific embodiment, referring back to Fig. 1 and Fig. 2, the sealing mechanism may include sealer 7 and the permission thermometric The seal cap 4 and sealing ring 5 that the ground surface end of line 3 or the ground surface end of the capillary pass through.One end of sealer 7 connects the point The ground surface end of firearm inner tube 9, the other end, which is provided with, allows the ground surface end of the thermometric line 3 or the ground surface end of the capillary to pass through Groove.The plug of sealing ring 5 is set to the groove, and the seal cap 4 is covered on the notch of the groove.The sealer 7 It such as can be flange, can be with the ground surface end of igniter inner tube 9 substantially sealed off, further, it can be with by seal cap 4 and sealing ring 5 Preferably seal the gap between thermometric line 3 or capillary and the sealer 7.The sealing ring 5 for example can be cushion rubber, the sealing Cap 4 for example can be rubber plug.

In some embodiments, referring back to Fig. 1 and Fig. 3, the downhole end of the thermometric line 3 or the downhole end of the capillary The downhole end of the igniter inner tube 9 is stretched out, the middle part for being set to the screen casing 31 of the gas injection tube column 23 is reached.The screen casing 31 can Think that annular, the downhole end of thermometric line 3 or the downhole end of capillary can extend to the central region of annular, can make thermometric with this Line 3 measures more accurate temperature during igniting, and capillary is made to measure more accurate pressure during igniting.

In some embodiments, referring back to Fig. 1, Fig. 3 and Fig. 5, the heating mechanism may also include that centralizing bracket 27, setting On the inside of the downhole end of the igniter inner tube 9, for limiting the downhole end of the thermometric line 3 or the downhole end of the capillary Position.For example, the centralizing bracket 27 can be fixed on the inside of igniter inner tube 9 with tripod, one end of the tripod, three foot The frame other end forms circular hole, and the downhole end of the downhole end or capillary that allow thermometric line 3 passes through.It can be guaranteed by centralizing bracket 27 The downhole end of the thermometric line 3 or the downhole end of the capillary are located at the middle position of heater strip, and thermometric or survey pressure are more acurrate.

In some embodiments, referring back to Fig. 1 and Fig. 2, the heating mechanism may also include that insulator 12 and sealant 11；The insulator 12 is filled between the igniter inner tube 9 and the igniter outer tube 13, so that first electricity Cable cable core 101 and 102 mutually insulated of the second cable conductor；The sealant 11 is filled in the igniter inner tube 9 The ground surface end in space between the igniter outer tube 13.The insulator 12 can be for example ceramic material, which can To be used to seal the insulator 12 and the first cable conductor 101, the second cable conductor 102, igniter inner tube 9 or igniter outer tube Gap between 13.The insulator 12 can be made of various materials resistant to high temperature, for example, mineral oxide magnesium.The sealant 11 It can prevent moisture from entering the material internal of insulator, avoid the decreasing insulating of insulator.

In some embodiments, referring back to Fig. 1, mobile electric igniter, which may also include that, is set to the gas injection entrance 16 Preventer 19 between the igniting sealer 18 and the guider 17 for assisting the heating mechanism to go into the well.The preventer 19 prevent gas blowout accident, and the specific structure of the preventer 19, which is referred to existing preventer structure, to be implemented.The guider 17 can play guiding role when igniter is transferred to underground, and the specific structure of the guider 17 is referred to existing lead Implement to device structure, such as can be sector structure.

In some embodiments, referring back to Fig. 1 and Fig. 3, mobile electric igniter, which may also include that, is sheathed on the air injection pipe Casing 21 and two packers outside column 23；The collar aperture 34 for being set to described sleeve pipe 21 neighbouring is set to the gas injection tube column 23 screen casing 32；Described two packers block the axis along described sleeve pipe 21 for being set to described sleeve pipe hole 34 and the screen casing 32 To two sides.The casing 21 can be fixed in well, which can be integrated with igniter or separable structure. Collar aperture 34 and screen casing 32 can be in the same horizontal position with oil reservoir 33.Two packers can be ring structure, Ke Yiyong Get up in by the Oil Guide space-closed between collar aperture 34 and screen casing 32, prevents oil body between gas injection tube column 23 and casing 21 Gap leaks out.

It will illustrate the embodiment of the mobile electric igniter of the utility model with a specific embodiment below.

Referring to Fig. 1 to Fig. 3, the mobile electric igniter of the embodiment, it may include: gas injection entrance 1, igniter internal channel enter Mouthfuls 2, thermometric line 3, thermometric line seal cap 4, sealing ring 5, thermometric line sealer inner cavity 6, thermometric line sealer 7, lead in igniter Road 8, igniter inner tube 9, cable conductor 101/102, electric insulating sealant 11, insulator 12, igniter outer tube 13, igniter 14, Gas injection distributor 15, gas injection tube column gas injection entrance 16, guider 17, igniter sealer 18, preventer 19, gas injection well head 20, Casing 21, outer annular space 22, gas injection tube column 23, interior annular space 24, the first packer 25, heater strip 26, temperature transducer centralizing bracket 27, Heater strip on line 28, end socket 29, temperature transducer 30, screen casing 31, screen casing hole 32, oil reservoir 33, collar aperture 34, the second packer 35,36 etc. are blocked.

Thermometric line 3 can be, and the armouring that thermocouple and compensating wire or built-in temperature-measuring optical fiber are arranged in stainless steel tube is surveyed Warm line.Igniter outer tube 13 can be not less than other of 825 alloys for 825 alloy materials or corrosion resistance and tensile strength Metal material.

Preventer 19 can be internal in a kind of special device axially with half envelope flashboard, blind rams, shear ram. Guider 17 can be the device that multiple concave idler wheels are equipped on semicircle circumference.Gas injection distributor 15 can be with threeway The valve group of function and the separately adjustable tolerance of energy.

There is capsule in igniter sealer 18, is full of hydraulic oil in capsule, and be connected with hydraulic pump, capsule top has close Packing material, and compressed by top pressure cap.Igniter 14 passes through pressure cap, airtight and watertight padding, capsule, when igniter removes, pressure cap It unclamps, so that capsule is held igniter tightly by adjusting prexxure of the hydraulic pump, play the role of the dynamic sealing between oil well and igniter.Work as a little After firearm removes stopping, pressure cap compresses airtight and watertight padding, plays the role of the static seal between oil well and igniter.It is embodied in construction Oil well with pressure can remove igniter, and igniter may be reused, and may be implemented to move for " cluster igniter " The igniter of dynamic formula.

Can be equipped in igniter 14: thermometric line 3, igniter internal channel 8, igniter inner tube 9, cable conductor 101/102, absolutely Edge sealant 11, insulator 12, igniter outer tube 13, heater strip 26, temperature transducer centralizing bracket 27, heater strip on line 28, envelope First 29, temperature transducer 30.It can be equipped in thermometric line sealer 7: thermometric line seal cap 4, sealing ring 5, one end and igniter Inner tube 9 connects.

In the present embodiment, it can be equipped in igniter 14: thermometric line 3, igniter internal channel 8, igniter inner tube 9, cable Cable core 101/102, insulator 12, igniter outer tube 13, heater strip 26, temperature transducer centralizing bracket 27, adds electric insulating sealant 11 Heated filament on line 28, end socket 29, temperature transducer 30 etc..

Insulator 12, cable conductor 101/102, igniter inner tube 9 can be successively equipped in igniter outer tube 13.Insulator 12 Upper end can be equipped with electric insulating sealant 11.101/102 lower end of cable conductor can be equipped with heater strip 26, and 26 lower end of heater strip is equipped with heating Silk on line 28.

Igniter internal channel 8 is formed on the inside of igniter inner tube 9, and is equipped with thermometric line 3；9 inner lower end position of igniter inner tube Equipped with temperature transducer centralizing bracket 27；3 lower end of thermometric line is equipped with temperature transducer 30, and exceeds firearm internal channel 8.

Igniter outer tube 13 and 9 lower end of igniter inner tube are equipped with end socket 29.In 14 upper end of igniter, thermometric line 3 is longer than a little Firearm inner tube 9, igniter inner tube 9 are longer than igniter outer tube 13.9 upper end of igniter inner tube is equipped with thermometric line sealer 7, can wrap It includes: igniter internal channel entrance 2, thermometric line seal cap 4, sealing ring 5, thermometric line sealer inner cavity 6.

In the present embodiment, 20 upper side of gas injection well head is equipped with gas injection tube column gas injection entrance 16,20 top of gas injection well head Equipped with preventer 19；19 top of preventer is equipped with igniter sealer 18.

In the present embodiment, 23 lower part of gas injection tube column is successively arranged screen casing 31, blocks 36, and screen casing 31 is with oil reservoir 33 same Depth；Casing 21 and gas injection tube column 23 constitute outer annular space 22, and the first packer 25 and the second packer 35 are respectively placed in oil reservoir 33 In the outer annular space 22 of upper and lower part.

In the present embodiment, 14 lower part of igniter is located at 33 top of oil reservoir, and heater strip 26 is located at the first packer 25 Between oil reservoir 33.

In the present embodiment, igniter 14 is by running and pulling device successively through guider 17, igniter sealer 18, preventer 19, gas injection well head 20 transfers to the set depth in interior annular space 24.

Gas injection channel can be two-way:

Gas injection channel 1: gas-injection station carrys out gas → gas injection entrance 1 → gas injection distributor 15 → gas injection tube column gas injection entrance 16 → interior 24 → screen casing of annular space hole, 32 → collar aperture, 34 → oil reservoir 33.

Gas injection channel 2: gas-injection station carrys out gas → gas injection entrance 1 → gas injection distributor 15 → igniter internal channel entrance 2 → survey Via hole → 32 → collar aperture of screen casing hole on warm linear sealing device inner cavity 6 → igniter, 8 → temperature transducer of internal channel centralizing bracket 27 34 → oil reservoir 33.

Gas injection distributor 15 can be equipped in gas injection channel, gas injection channel is after gas injection distributor 15, respectively into igniter Channel 8 and the gas injection simultaneously of interior annular space 24.

In the present embodiment, the air themperature after the measurement of temperature transducer 30 heating, is transmitted to ground by thermometric line 3； Temperature transducer 30 and thermometric line 3 can also be changed to the pressure that capillary measures shaft bottom with repair and replacement.

The electric igniter of the present embodiment realizes the heating of gas injection simultaneously of mobile electric igniter binary channels, improves heat exchange Efficiency；And it can realize and downhole temperature, survey pressure are monitored during igniting.

In conclusion the mobile electric igniter of the utility model embodiment, by utilizing the first gas injecting pipe connection note Space between tracheae column and igniter outer tube sets hollow for the inside of igniter inner tube, and utilizes the second gas injecting pipe It is connected to the inside of igniter inner tube, two-way is capable of forming and leads to the air supply channel of oil reservoir near gas injection tube column bottom, and pass through First cable conductor of mutually insulated and the second cable conductor are extended between igniter inner tube and igniter outer tube, and Heater strip is connected to the downhole end of two cable conductors, can make the gas from two-way air supply channel respectively from heater strip Inside and outside reach oil reservoir near, with this, the contact area of heater strip and gas can be increased, thus improve igniting during changing The thermal efficiency.

In the description of this specification, reference term " one embodiment ", " specific embodiment ", " some implementations Example ", " such as ", the description of " example ", " specific example " or " some examples " etc. mean it is described in conjunction with this embodiment or example Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the utility model.In this specification In, schematic expression of the above terms may not refer to the same embodiment or example.Moreover, the specific features of description, Structure, material or feature can be combined in any suitable manner in any one or more of the embodiments or examples.It is each to implement The step of involved in example, sequence was used to schematically illustrate the implementation of the utility model, and sequence of steps therein is not construed as limiting, can root It is appropriately adjusted according to needs.

Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects Step is described in detail, it should be understood that being not used to limit this foregoing is merely specific embodiment of the utility model The protection scope of utility model, within the spirit and principle of the utility model, any modification for being made, changes equivalent replacement Into etc., it should be included within the scope of protection of this utility model.

Claims (12)

1. a kind of movable type electric igniter characterized by comprising

Heating mechanism, comprising:

Igniter inner tube, inner hollow and underground end opening；

Igniter outer tube is sheathed on outside the igniter inner tube；Outside the downhole end of the igniter inner tube and the igniter It is closed and is connected by end socket between the downhole end of pipe；The underground part of the igniter outer tube is for being sheathed in gas injection tube column Portion, and be tightly connected by the uphole end of igniting sealer and the gas injection tube column；

The first cable conductor and the second cable conductor of mutually insulated, are extended in the igniter inner tube and the igniter Between outer tube, and the downhole end of first cable conductor and the downhole end of the second cable conductor are electrically connected by heater strip；Institute The ground surface end of the first cable conductor and the ground surface end of second cable conductor are stated for connecting power supply；

Gas supply mechanism, comprising:

First gas injecting pipe, via the gas injection entrance opened up on the gas injection tube column, with the gas injection tube column and the igniter Space connection between outer tube；

Second gas injecting pipe is connected to via the ground surface end of the igniter inner tube with the inside of the igniter inner tube.

2. movable type electric igniter as described in claim 1, which is characterized in that the heater strip, including along the igniter Inner tube axially extending the first heater strip section and the second heater strip section, the first end and the second heater strip of the first heater strip section The first end of section is connect with the downhole end of the downhole end of first cable conductor and the second cable conductor respectively, and described first adds The second end of the second end of heated filament section and the second heater strip section passes through the annular-heating silk that circumferentially extends along the igniter inner tube Line connection.

3. movable type electric igniter as described in claim 1, which is characterized in that further include: gas injection distributor, being used for will be same The gas of gas source is distributed to first gas injecting pipe and second gas injecting pipe.

4. movable type electric igniter as described in claim 1, which is characterized in that further include: measuring mechanism and the sealing point The sealing mechanism of the ground surface end of firearm inner tube；

The measuring mechanism includes temperature measuring equipment or pressure measuring unit, wears the inside of the igniter inner tube, and one end passes through The sealing mechanism reaches the outside of the igniter inner tube.

5. movable type electric igniter as claimed in claim 4, which is characterized in that

The temperature measuring equipment includes the thermometric line for wearing the inside of the igniter inner tube and the underground for being set to the thermometric line The temperature sensor at end；

The pressure measuring unit includes the capillary for wearing the inside of the igniter inner tube.

6. movable type electric igniter as claimed in claim 5, which is characterized in that the sealing mechanism includes sealer and permission The seal cap and sealing ring that the ground surface end of the thermometric line or the ground surface end of the capillary pass through；One end of sealer connects institute The ground surface end of igniter inner tube is stated, the other end, which is provided with, allows the ground surface end of the thermometric line or the ground surface end of the capillary to wear The groove crossed；The sealing ring taps is set to the groove, and the sealed cap is set to the notch of the groove.

7. movable type electric igniter as claimed in claim 5, which is characterized in that the downhole end of the thermometric line or the capillary The downhole end of pipe stretches out the downhole end of the igniter inner tube, reaches the middle part for being set to the screen casing of the gas injection tube column.

8. movable type electric igniter as claimed in claim 5, which is characterized in that the heating mechanism further include: centralizing bracket, if It is placed on the inside of the downhole end of the igniter inner tube, for limiting the downhole end of the thermometric line or the downhole end of the capillary Position.

9. movable type electric igniter as described in claim 1, which is characterized in that the heating mechanism further include: insulator and Sealant；The insulator is filled between the igniter inner tube and the igniter outer tube, so that first electricity Cable cable core and the second cable conductor mutually insulated；The sealant is filled in the igniter inner tube and the igniting The ground surface end in space between device outer tube.

10. movable type electric igniter as described in claim 1, which is characterized in that further include: be set to the gas injection entrance with Preventer between the igniting sealer and the guider for assisting the heating mechanism to go into the well.

11. movable type electric igniter as described in claim 1, which is characterized in that further include: it is sheathed on outside the gas injection tube column The casing in portion and two packers；It is set to the neighbouring screen casing for being set to the gas injection tube column of collar aperture of described sleeve pipe；It is described Two packers block the axial two sides along described sleeve pipe for being set to described sleeve pipe hole and the screen casing.

12. movable type electric igniter as claimed in claim 3, which is characterized in that the gas injection distributor includes triple valve.