CN106016221A - Electric heating type downhole steam generator - Google Patents
Electric heating type downhole steam generator Download PDFInfo
- Publication number
- CN106016221A CN106016221A CN201610531573.6A CN201610531573A CN106016221A CN 106016221 A CN106016221 A CN 106016221A CN 201610531573 A CN201610531573 A CN 201610531573A CN 106016221 A CN106016221 A CN 106016221A
- Authority
- CN
- China
- Prior art keywords
- heating
- electric heating
- steam generator
- heat pipe
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Abstract
The invention relates to the technical field of heavy oil thermal recovery in petroleum engineering, in particular to an electric heating type downhole steam generator. The generator comprises an inlet part, an electric heating part and an outlet part which are sequentially connected from top to bottom, wherein the electric heating part comprises at least one heating section; each heating section comprises a heating section casing and multiple heating tubes arranged inside the heating section casing; electric heating wires are arranged in all the heating tubes, and positions between the electric heating wires and the heating tubes are filled with insulating and temperature-resistant materials; space allowing water to flow through is formed among the heating tubes and between the heating tubes and the heating section casings; a water inlet is arranged at the inlet part; and a discharge port is arranged at the outlet part. High-temperature steam is produced downhole and directly injected into an oil layer, the heat loss is reduced, the energy utilization rate is greatly increased, and the generator has the outstanding advantages in deep well and extra-deep wells; and the electric heating wires are arranged in the heating tubes, so that the generator is convenient to mount, good in reliability and more beneficial to steam generation.
Description
Technical field
The present invention relates to petroleum works heavy crude heat extraction technical field, be specifically related to a kind of electric heating well
Lower steam generator.
Background technology
There is abundant viscous crude resource in China, but cost of winning and difficulty are bigger.At heavy crude heat extraction
In, it is one of method the most most widely used, that technology is more ripe that steam drives.
Steam generator is as one of indispensable equipment of steam flooding technology, the most most common
Way is to produce the steam of High Temperature High Pressure on ground, is injected into thick oil underground well oil by utilidor
In Ceng.This technology uphole equipment is bulky, needs the input of higher auxiliary facility,
Waste gas takes away substantial amounts of heat energy, pollutes surrounding air；And after ground steam passes through long pipe road,
Energy loss is big, has become " hot water " to high-temperature steam during shaft bottom, and steam note effect and the degree of depth are subject to
To limiting, especially for deep-well and ultradeep well, the mode that conventional ground steam injects can not
Adapt to exploitation requirement.
Patent CN103759240A discloses a kind of downhole electric heating steam generator, such as Fig. 1
Shown in, specifically include that housing 1 ', add heat pipe 2 ', electrical heating elements 3 ' and support every
Plate 5 '.Wherein, adding heat pipe 2 ' generally hollow cylinder, its hollow space is through hole, stream
Body circulates from described through hole, the heating wire that electrical heating elements 3 ' is the most elongated, is wound around
On the tube wall adding heat pipe 2 ', after electrical heating elements 3 ' is energized, to adding in heat pipe 2 '
Fluid heat, generate steam send from bottom.Supporting clapboard 5 ' its be arranged on housing
1 ' is internal, passes for adding heat pipe 2 ' and electrical heating elements 3 ', and plays adding heat pipe 2 '
Supporting role.
This structure existence following several places shortcoming:
(1) inconvenience is installed, is susceptible to collide with and damage heating wire；
(2) due to the restriction of down-hole size, the adjacent spacing added between heat pipe is the least, electric heating
Silk is wrapped in and adds heat pipe outer surface, it is possible to can contact and produce and take electricity, thus cause fault or
Damage adds heat pipe；
(3) heating wire winding is adding heat pipe outer surface, owing to supporting clapboard can be sent out with heating wire
Raw directly contact, it is therefore desirable to do insulation processing at contact position, add cost；
(4) on the premise of ensureing heating-up temperature, the internal diameter adding heat pipe is limited, so that steaming
Vapour generating capacity is limited；And if adding heat pipe quantity, the diameter of the housing to be increased that is bound to, for
The use of equipment adds difficulty and cost.
Summary of the invention
It is an object of the invention to provide a kind of electric heating downhole steam generator, it is possible at viscous crude
Producing steam at oil reservoir and be directly injected into oil reservoir, the thermal efficiency is high and will not produce air pollution, with
Time safety and reliability high.
The electric heating downhole steam generator that the present invention provides, includes being sequentially connected with from top to bottom
Inlet portion, electrical heating portion and export department；
Described electrical heating portion includes that at least one bringing-up section, described bringing-up section include bringing-up section housing
And be placed in described bringing-up section housing many add heat pipe；Set respectively in adding heat pipe described in each
Put heating wire, and fill insulating temperature resistant meterial between heat pipe at described heating wire and described adding；Respectively
Described add between heat pipe and described in add and formed for current between heat pipe and described bringing-up section housing
The space crossed；
Being provided with water inlet on described inlet portion, described export department is provided with outlet.
Further, described bringing-up section is be sequentially connected in series multiple, the described heating of adjacent each section
Connected by housing joint between piece housing, add described in adjacent each section between heat pipe by heating
Pipe connector connects.
Further, what described electrical heating portion also included the binding post at top and bottom adds heat pipe
Seat；Add the upper end of heat pipe most described in each of the section of top and add the lower end of heat pipe described in end section
It is tightly connected with described binding post and described heating pipe holder respectively.
Further, described inlet portion specifically includes upper binding head, valve seat, spool and lower company
Joint；
Described upper binding head is for being connected with inlet channel, and described lower union joint is used for and described electricity
Heating part connects；
Described valve seat and described spool are arranged between described upper binding head and described lower union joint,
Make water from the described upper binding head described lower union joint of unidirectional inflow, and reduce the flow velocity into water
And pressure.
Valve seat and spool constitute single current air relief valve, by water injection pipe and fluid in steam generator every
Open, prevent steam overflow in the case of the excessive pressure of shaft bottom；This valve opening ways is pressure simultaneously
Power is opened, and has effect of easing stress, beneficially the control of ground water injection pressure.
Further, described valve seat is provided with valve port；
Described spool is arranged on the described valve seat side near lower union joint, including valve rod, valve head
And spring；Described spring housing is located on described valve rod, and described valve head is pressed on described valve seat
On, and by described sealing valve port.
Further, the sealing surface of described valve head is sphere, the sealing at the valve port of described valve seat
Face is two sections of conical surfaces with different tapering connected.
Further, the sidewall of described lower union joint is provided with liquid level sensor, is used for monitoring
Liquid level in described electrical heating portion.
Further, on the sidewall of described lower union joint, setting is tightly connected with described binding post
Cable transferring head, for the cable seal in described binding post is picked out.
Further, described export department includes tail pipe, tail pipe union joint and a stay tube；
Described tail pipe is connected with described electrical heating portion by described tail pipe union joint；And at described tail
The lower sides uniform multiple described outlets of circumference of pipe；
Described stay tube is arranged in described tail pipe, axially props up for playing described heating pipe holder
The effect of support.
Further, the diapire of described tail pipe arranges temperature sensor and pressure transducer, point
Yong Yu not monitor the temperature and pressure of steam at described outlet.
The invention have the benefit that
High-temperature steam produces in down-hole and is directly injected into oil reservoir, is led to by ground steam with traditional approach
The method crossing steam injection pipe injection down-hole is compared, and decreases heat loss to the full extent, significantly carries
High capacity usage ratio, the advantage in deep-well and ultradeep well is especially prominent；
Heating wire is arranged on and adds in heat pipe, will not damage because colliding with, and installs more convenient；Adjacent
Heating wire also will not produce because of contact and take electricity, better reliability；Fluid passage for add heat pipe with
Adding the gap between heat pipe, under steam generator same outer diameter, cross section of fluid channel is long-pending can be done
Bigger, under same treatment amount, flow velocity is less, and the residence time of fluid is longer, is more beneficial for fully
Heat absorption.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical side of the prior art
Case, will make letter to the accompanying drawing used required in detailed description of the invention or description of the prior art below
Singly introduce, it should be apparent that, the accompanying drawing in describing below is some embodiments of the present invention,
For those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the downhole electric heating steam generator disclosed in prior art；
The structural representation of the electric heating downhole steam generator that Fig. 2 provides for the embodiment of the present invention
Figure；
Fig. 3 is the schematic cross-section in the A-A face in Fig. 2；
Fig. 4 is the schematic diagram adding heat pipe bracing frame in Fig. 2；
Reference:
101-upper binding head；102-valve seat；
103-spool；104-lower union joint；
105-liquid level sensor；106-cable transferring head；
201-binding post；202-adds heat pipe bracing frame；
203-bringing-up section housing；204-heating wire；
205-heatproof filler；206-adds heat pipe；
207-heats pipe connector；208-housing joint；
209-heating pipe holder；301-tail pipe union joint；
302-props up stay tube；303-tail pipe；
304-temperature sensor；305-pressure transducer.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, aobvious
So, described embodiment is a part of embodiment of the present invention rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work
The every other embodiment obtained under premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score,
The orientation of the instruction such as "left", "right", " vertically ", " level ", " interior ", " outward " or position relationship
For based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplification
Describe rather than instruction or the hint device of indication or element must have specific orientation, with
Specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, art
Language " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicate or dark
Show relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited,
Term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing,
Can also be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electricity
Connect；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal.For the ordinary skill in the art, can manage with concrete condition
Solve above-mentioned term concrete meaning in the present invention.
The structural representation of the electric heating downhole steam generator that Fig. 2 provides for the embodiment of the present invention
Figure；Fig. 3 is the schematic cross-section in the A-A face in Fig. 2；Fig. 4 is to add heat pipe in Fig. 2
The schematic diagram of bracing frame.
As shown in Figure 2 to 4, the structure of this electric heating downhole steam generator include to
Under the inlet portion, electrical heating portion and the export department that are sequentially connected with.
Concrete, inlet portion includes upper binding head 101, valve seat 102, spool 103 and lower company
Joint 104；Electrical heating portion includes binding post 201, adds heat pipe bracing frame 202, bringing-up section
Housing 203, heating wire 204, heatproof filler 205, add heat pipe 206, heating pipe connector
207, housing joint 208 and heating pipe holder 209；Export department includes tail pipe union joint 301, props up
Stay tube 302 and tail pipe 303.
By lower union joint 104 and bringing-up section housing 203 screw thread between inlet portion and electrical heating portion
Connect, by bringing-up section housing 203 and tail pipe union joint 301 between electrical heating portion and export department
Threaded.
The concrete structure of inlet portion is: valve seat 102 and spool 103 are arranged on upper binding head 101
And in the valve body between lower union joint 104；Valve seat 102 is installed in valve body, and valve seat 102
Center be provided with valve port.Spool is arranged on valve seat 102 near the one of lower union joint 104
Side, including valve head, valve rod and spring；Valve rod is fixed in valve body by positioning sleeve, and valve rod
It is provided with the flowing hole passed through that supplies water.Valve head is mushroom, and upper end is hemispheric seal head,
Lower end is stock, arranges with valve rod relative spacing.Spring housing is located at the stock of valve rod and valve head
On, by valve head jack-up, make sealing valve port.
Valve seat 102 and spool 103 constitute air relief valve, can play decompressing effect to injecting water, with
Time also be able to play the effect of ball-and-seat.In order to improve tightness, the valve head of spool 103 seals
Face is sphere, and the sealing surface at valve seat 102 valve port is two sections of cones with different tapering connected
Face, is more beneficial for by the way of throttling reducing pressure, also allows for processing.
Positioning sleeve is divided into two sections, is fixed with valve rod by valve seat 102, and by regulation two
The length of positioning sleeve, thus it is possible to vary the decrement of spring, thus change the unlatching pressure of valve head.
By the one way pressure-reducing valve increased, valve seat 102 top (water injection pipe) (is steamed with bottom
Vapour generator) in fluid separate, prevent steam overflow in the case of the excessive pressure of shaft bottom；
This valve opening ways is opened by pressure simultaneously, beneficially the control of ground water injection pressure.
Electrical heating portion can be made up of single bringing-up section or multistage heating section, and particular number can root
Determining according to heating power, the present embodiment illustrates as a example by three bringing-up sections.The structure of every section
Identical, all comprise and add heat pipe bracing frame 202, bringing-up section housing 203, heating wire 204, resistance to
Temperature filler 205 and add heat pipe 206.
The bringing-up section housing 203 of adjacent two sections is threaded by housing joint 208, adjacent
Two sections are added heat pipe 206 and are connected by heating pipe connector 207, topmost add heat pipe 206
Top is tightly connected with binding post 201, bottom add bottom heat pipe 206 and heating pipe holder
209 are tightly connected.
Heating wire 204 is distributed on and adds in heat pipe 206, heating wire 204 and adding between heat pipe 206
The heatproof filler 205 of insulation is filled in gap.In the present embodiment, add heat pipe 206 and have 7,
Being distributed on bringing-up section housing 203 internal, 7 add heat pipe 206 and lead in bringing-up section housing 203
Cross and add heat pipe bracing frame 202 and support, make to add between heat pipe 206 and bringing-up section housing 203 and
Respectively add and between heat pipe 206, form the passage flow through that supplies water.
Compared with patent CN103759240A, the program has the advantage that
Add heat pipe and do not worry the damage heating wire that collides with when mounted, enhanced convenience is installed；
Due to the restriction of down-hole size, respectively adding the spacing between heat pipe will certainly be the least, if electric
Heated filament is wrapped in and adds heat pipe outer surface, and the adjacent heating wire added on heat pipe the most likely can
Contact and produce and take electricity and cause fault or damage to add heat pipe；The heating wire of the present embodiment is arranged in
Adding in heat pipe, heated protection of pipe gets up, better reliability；
Heating wire winding is adding heat pipe outer surface, and the supporting construction of electrothermal tube is (due to meeting and electric heating
Silk directly contact, it is therefore desirable to insulation processing；And the supporting construction of the application and adding between heat pipe
Need not do insulation processing, supporting construction is simpler；
This patent fluid passage is to add heat pipe and the gap adding between heat pipe, in steam generator phase
With under external diameter, cross section of fluid channel is long-pending can do bigger, under same treatment amount, flow velocity is less, fluid
Residence time longer, be more beneficial for fully absorbing heat.
The concrete structure of export department is: a stay tube 302 is arranged in tail pipe 303, a stay tube
The top of 302 is connected with heating pipe holder 209, and heating pipe holder 209 plays the work of axially support
With.It is evenly distributed 4 outlets on the lower sides of tail pipe 303, is used for discharging high temperature and steams
Vapour.
In the preferred version of the present embodiment, the sidewall of lower union joint 104 arranges liquid level and passes
Sensor 105, for monitoring the level condition in electrical heating portion.
In the preferred version of the present embodiment, the sidewall of lower union joint 104 is arranged and wiring
The cable transferring head 106 that terminal 201 and lower union joint 104 are all tightly connected, for by outside
Cable is connected with the cable in binding post 201.
In the preferred version of the present embodiment, tail pipe 303 bottom mounting temperature sensor 304
With pressure transducer 305, it is respectively intended to monitor the temperature and pressure of steam at outlet.
During use, the upper binding head 101 of inlet portion is connected with assorted column jacket, electric heating down-hole
Steam generator is lowered in the Heavy Oil Reservoir section sleeve pipe of target well, and cable transferring head 106 connects
Cable is also energized, and the clear water of injection flows into electrical heating after being reduced pressure by the spool 103 of inlet portion
Portion, the heat pipe 206 that adds being electrically heated portion heats, water at the runner added between heat pipe 206 along axle
To one side sluggish flow while being heated up evaporation to produce high-temperature steam；High-temperature steam passes through
The steam outlet of oral area enters in production string, enters oil reservoir under the effect of the pressure to viscous crude
Heating, viscosity reducing.
High-temperature steam produces in down-hole and is directly injected into oil reservoir, is led to by ground steam with traditional approach
The method crossing steam injection pipe injection down-hole is compared, and decreases heat loss to the full extent, significantly carries
High capacity usage ratio, the advantage in deep-well and ultradeep well is especially prominent.
It is last it is noted that various embodiments above is only in order to illustrate technical scheme,
It is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments,
It will be understood by those within the art that: it still can be to described in foregoing embodiments
Technical scheme modify, or the most some or all of technical characteristic carried out equivalent replace
Change；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the present invention each
The scope of embodiment technical scheme.
Claims (10)
1. an electric heating downhole steam generator, it is characterised in that include from top to bottom depending on
The inlet portion of secondary connection, electrical heating portion and export department；
Described electrical heating portion includes that at least one bringing-up section, described bringing-up section include bringing-up section housing
And be placed in described bringing-up section housing many add heat pipe；Set respectively in adding heat pipe described in each
Put heating wire, and fill insulating temperature resistant meterial between heat pipe at described heating wire and described adding；Respectively
Described add between heat pipe and described in add and formed for current between heat pipe and described bringing-up section housing
The space crossed；
Being provided with water inlet on described inlet portion, described export department is provided with outlet.
Electric heating downhole steam generator the most according to claim 1, it is characterised in that
Described bringing-up section is be sequentially connected in series multiple, passes through between the described bringing-up section housing of adjacent each section
Housing joint connects, and adds and connected by heating pipe connector between heat pipe described in adjacent each section.
Electric heating downhole steam generator the most according to claim 1 and 2, its feature
Being, described electrical heating portion also includes the binding post at top and the heating pipe holder of bottom；Push up most
The upper end adding heat pipe described in each of section and the lower end adding heat pipe described in end section respectively with
Described binding post and described heating pipe holder are tightly connected.
Electric heating downhole steam generator the most according to claim 3, it is characterised in that
Described inlet portion includes upper binding head, valve seat, spool and lower union joint；
Described upper binding head is for being connected with inlet channel, and described lower union joint is used for and described electricity
Heating part connects；
Described valve seat and described spool are arranged between described upper binding head and described lower union joint,
Make water from the described upper binding head described lower union joint of unidirectional inflow, and reduce the flow velocity into water
And pressure.
Electric heating downhole steam generator the most according to claim 4, it is characterised in that
It is provided with valve port on described valve seat；
Described spool is arranged on the described valve seat side near lower union joint, including valve rod, valve head
And spring；Described spring housing is located on described valve rod, and described valve head is pressed on described valve seat
On, and by described sealing valve port.
Electric heating downhole steam generator the most according to claim 5, it is characterised in that
The sealing surface of described valve head is sphere, and the sealing surface at the valve port of described valve seat is two sections and connects
There is the conical surface of different tapering.
Electric heating downhole steam generator the most according to claim 4, it is characterised in that
It is provided with liquid level sensor on the sidewall of described lower union joint, is used for monitoring in described electrical heating portion
Liquid level.
Electric heating downhole steam generator the most according to claim 4, it is characterised in that
The cable transferring head being tightly connected with described binding post is set on the sidewall of described lower union joint,
For the cable seal in described binding post is picked out.
Electric heating downhole steam generator the most according to claim 2, it is characterised in that
Described export department includes tail pipe, tail pipe union joint and a stay tube；
Described tail pipe is connected with described electrical heating portion by described tail pipe union joint；And at described tail
The lower sides uniform multiple described outlets of circumference of pipe；
Described stay tube is arranged in described tail pipe, axially props up for playing described heating pipe holder
The effect of support.
Electric heating downhole steam generator the most according to claim 9, it is characterised in that
Temperature sensor and pressure transducer are set on the diapire of described tail pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610531573.6A CN106016221B (en) | 2016-07-07 | 2016-07-07 | Electric heating type downhole steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610531573.6A CN106016221B (en) | 2016-07-07 | 2016-07-07 | Electric heating type downhole steam generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106016221A true CN106016221A (en) | 2016-10-12 |
| CN106016221B CN106016221B (en) | 2021-04-20 |
Family
ID=57108156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610531573.6A Active CN106016221B (en) | 2016-07-07 | 2016-07-07 | Electric heating type downhole steam generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106016221B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837278A (en) * | 2017-03-31 | 2017-06-13 | 邓晓亮 | The method of electromagnetic wave underground steam generating means and its manufacture superheated steam |
| CN108104783A (en) * | 2017-12-25 | 2018-06-01 | 刘玉友 | A kind of coiled tubing thick oil heating arrangement |
| CN110173679A (en) * | 2019-05-17 | 2019-08-27 | 重庆科技学院 | A kind of miniature steam generator of implantable |
| CN110965976A (en) * | 2017-12-25 | 2020-04-07 | 刘玉友 | Thick oil heating device |
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| CN105737365A (en) * | 2016-04-20 | 2016-07-06 | 天津大学 | Medium- and low-temperature high-pressure pipeline type electric heater |
| CN205782800U (en) * | 2016-07-07 | 2016-12-07 | 长江大学 | Electric heating downhole steam generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837278A (en) * | 2017-03-31 | 2017-06-13 | 邓晓亮 | The method of electromagnetic wave underground steam generating means and its manufacture superheated steam |
| CN106837278B (en) * | 2017-03-31 | 2023-10-13 | 邓晓亮 | Electromagnetic wave underground steam generating device and method for manufacturing superheated steam by using same |
| CN108104783A (en) * | 2017-12-25 | 2018-06-01 | 刘玉友 | A kind of coiled tubing thick oil heating arrangement |
| CN110965976A (en) * | 2017-12-25 | 2020-04-07 | 刘玉友 | Thick oil heating device |
| CN110173679A (en) * | 2019-05-17 | 2019-08-27 | 重庆科技学院 | A kind of miniature steam generator of implantable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106016221B (en) | 2021-04-20 |
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