CN205782800U - Electric heating downhole steam generator - Google Patents

Abstract

This utility model relates to petroleum works heavy crude heat extraction technical field, is specifically related to a kind of electric heating downhole steam generator.This electric heating downhole steam generator includes inlet portion, electrical heating portion and the export department being sequentially connected with from top to bottom；Electrical heating portion includes at least one bringing-up section, and bringing-up section includes that bringing-up section housing and be placed in bringing-up section housing many add heat pipe；Each add heat pipe in be respectively provided with heating wire, and at heating wire and add filling insulating temperature resistant meterial between heat pipe；Respectively add between heat pipe and add and between heat pipe and bringing-up section housing, form the space flow through of supplying water；Being provided with water inlet on inlet portion, export department is provided with outlet.High-temperature steam produces in down-hole and is directly injected into oil reservoir, decreases heat loss, substantially increases capacity usage ratio, and the advantage in deep-well and ultradeep well is especially prominent；Heating wire is arranged on and adds in heat pipe, easy for installation, good reliability, and is more beneficial for the generation of steam.

Description

Electric heating downhole steam generator

Technical field

This utility model relates to petroleum works heavy crude heat extraction technical field, is specifically related to a kind of electric heating underground steam and occurs Device.

Background technology

There is abundant viscous crude resource in China, but cost of winning and difficulty are bigger.In heavy crude heat extraction, it is current that steam drives One of method that most widely used, technology is more ripe.

Steam generator is as one of indispensable equipment of steam flooding technology, and current most common way is to produce on ground The steam of raw High Temperature High Pressure, is injected in thick oil underground well oil reservoir by utilidor.This technology uphole equipment is bulky, Needing the input of higher auxiliary facility, waste gas takes away substantial amounts of heat energy, pollutes surrounding air；And ground steam passes through long pipe Behind 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 restricted, especially For deep-well and ultradeep well, the mode that conventional ground steam injects the most does not adapts to exploit requirement.

Patent CN103759240A discloses a kind of downhole electric heating steam generator, as it is shown in figure 1, specifically include that shell Body 1 ', add heat pipe 2 ', electrical heating elements 3 ' and supporting clapboard 5 '.Wherein, heat pipe 2 ' generally hollow cylinder, its hollow bulb are added Being divided into through hole, fluid circulates from described through hole, and the heating wire that electrical heating elements 3 ' is the most elongated is wrapped in and adds heat pipe On the tube wall of 2 ', after electrical heating elements 3 ' is energized, the fluid added in heat pipe 2 ' is heated, generate steam and send from bottom Go out.Supporting clapboard 5 ' its to be arranged on housing 1 ' internal, pass for adding heat pipe 2 ' and electrical heating elements 3 ', and play 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, and heating wire winding is adding heat pipe appearance Face, it is possible to can contact and produce and take electricity, thus cause fault or damage to add heat pipe；

(3) heating wire winding is adding heat pipe outer surface, owing to supporting clapboard can occur directly to contact with heating wire, therefore needs To do insulation processing at contact position, to add cost；

(4) on the premise of ensureing heating-up temperature, the internal diameter adding heat pipe is limited, so that steam generating amount is limited；And increase If adding heat pipe quantity, the diameter of the housing to be increased that is bound to, the use for equipment adds difficulty and cost.

Utility model content

The purpose of this utility model is to provide a kind of electric heating downhole steam generator, it is possible to produce at Heavy Oil Reservoir Steam is also directly injected into oil reservoir, and the thermal efficiency is high and will not produce air pollution, and safety and reliability is high simultaneously.

The electric heating downhole steam generator that this utility model provides, includes inlet portion, the electricity being sequentially connected with from top to bottom Heating part 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 add described in being placed in Many in hot arc housing add heat pipe；It is respectively provided with heating wire in adding heat pipe described in each, and adds with described at described heating wire Insulating temperature resistant meterial is filled between heat pipe；Add described in each between heat pipe and described in add shape between heat pipe and described bringing-up section housing Become the space flow through of supplying water；

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, 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.

Further, described electrical heating portion also includes the binding post at top and the heating pipe holder of bottom；The section of top is each most The upper end adding heat pipe described in root and the lower end adding heat pipe described in end section respectively with described binding post and described in add heat pipe Seat is tightly connected.

Further, described inlet portion specifically 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 for being connected with described electrical heating portion；

Described valve seat and described spool are arranged between described upper binding head and described lower union joint, make water from described In the described lower union joint of the unidirectional inflow of union joint, and reduce the flow velocity into water and pressure.

Valve seat and spool constitute single current air relief valve, are separated with fluid in steam generator by water injection pipe, prevent steam at well Overflow in the case of end excessive pressure；This valve opening ways is opened by pressure simultaneously, has effect of easing stress, beneficially ground water filling The control of 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 bullet Spring is set on described valve rod, is pressed on described valve seat by described valve head, and by described sealing valve port.

Further, 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.

Further, the sidewall of described lower union joint is provided with liquid level sensor, is used for monitoring in described electrical heating portion Liquid level.

Further, the sidewall of described lower union joint arranges the cable transferring head being tightly connected with described binding post, 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 in the lower sides week of described tail pipe To uniform multiple described outlets；

Described stay tube is arranged in described tail pipe, for described heating pipe holder plays the effect of axially support.

Further, the diapire of described tail pipe arranges temperature sensor and pressure transducer, be respectively used to monitoring described The temperature and pressure of steam at outlet.

The beneficial effects of the utility model are:

High-temperature steam produces in down-hole and is directly injected into oil reservoir, with traditional approach, by steam injection pipe, ground steam is injected well Under method compare, decrease heat loss to the full extent, substantially increase capacity usage ratio, in deep-well and ultradeep well Advantage 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 be because connecing Touch and produce and take electricity, better reliability；Fluid passage is to add heat pipe and the gap adding between heat pipe, outside steam generator is identical Under footpath, cross section of fluid channel is long-pending can do 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 this utility model detailed description of the invention or technical scheme of the prior art, below by right In detailed description of the invention or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below In accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, it is also possible 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 this utility model embodiment；

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, the technical solution of the utility model is clearly and completely described, it is clear that described Embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, this The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, broadly falls into this practicality Novel protected scope.

In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, be only Must have specific for the ease of describing this utility model and simplification description rather than instruction or the device of hint indication or element Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Language concrete meaning in this utility model.

The structural representation of the electric heating downhole steam generator that Fig. 2 provides for this utility model embodiment；Fig. 3 is Fig. 2 In the schematic cross-section in A-A face；Fig. 4 is the schematic diagram adding heat pipe bracing frame in Fig. 2.

As shown in Figure 2 to 4, the structure of this electric heating downhole steam generator includes the entrance being sequentially connected with from top to bottom Portion, electrical heating portion and export department.

Concrete, inlet portion includes upper binding head 101, valve seat 102, spool 103 and lower union joint 104；Electrical heating portion wraps Include binding post 201, add 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, stay tube 302 and Tail pipe 303.

Threadeded with bringing-up section housing 203 by lower union joint 104 between inlet portion with electrical heating portion, electrical heating portion and Threadeded with tail pipe union joint 301 by bringing-up section housing 203 between export department.

The concrete structure of inlet portion is: valve seat 102 and spool 103 are arranged between upper binding head 101 and lower union joint 104 Valve body in；Valve seat 102 is installed in valve body, and the center of valve seat 102 is provided with valve port.Spool is arranged on valve seat 102 Near the side of lower union joint 104, including valve head, valve rod and spring；Valve rod is fixed in valve body by positioning sleeve, and on 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, and lower end is stock, relative with valve rod Interval is arranged.Spring housing is located on the stock of valve rod and valve head, by valve head jack-up, makes sealing valve port.

Valve seat 102 and spool 103 constitute air relief valve, can play decompressing effect to injecting water, also be able to play single current simultaneously The effect of valve.In order to improve tightness, the valve head sealing surface of spool 103 is sphere, and the sealing surface at valve seat 102 valve port is two sections The conical surface with different tapering connected, 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 regulating the length of two positioning sleeves, can To change the decrement of spring, thus change the unlatching pressure of valve head.

By the one way pressure-reducing valve increased, by valve seat 102 top (water injection pipe) and the fluid in bottom (steam generator) Separate, prevent steam overflow in the case of the excessive pressure of shaft bottom；This valve opening ways is opened by pressure, beneficially ground simultaneously The control of water injection pressure.

Electrical heating portion can be made up of single bringing-up section or multistage heating section, and particular number can be true according to heating power Fixed, the present embodiment illustrates as a example by three bringing-up sections.The structure of every section is identical, all comprises and adds heat pipe bracing frame 202, heating Piece housing 203, heating wire 204, heatproof filler 205 and add heat pipe 206.

The bringing-up section housing 203 of adjacent two sections is threaded by housing joint 208, and adjacent two sections add heat pipe 206 and lead to Crossing heating pipe connector 207 to connect, heat pipe 206 top that adds topmost is tightly connected with binding post 201, the heating of bottom It is tightly connected with heating pipe holder 209 bottom pipe 206.

Heating wire 204 is distributed on and adds in heat pipe 206, heating wire 204 and add gap between heat pipe 206 and fill the heatproof of insulation Filler 205.In the present embodiment, adding heat pipe 206 and have 7, be distributed on bringing-up section housing 203 internal, 7 add heat pipe 206 and are adding Support by adding heat pipe bracing frame 202 in hot arc housing 203, make to add between heat pipe 206 and bringing-up section housing 203 and respectively heat The passage flow through that supplies water is formed between pipe 206.

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 heating wire winding is in heating Tube outer surface, 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 and adds in heat pipe, and 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 (owing to can directly contact with heating wire, therefore Need insulation processing；And the supporting construction of the application and add and need not do insulation processing between heat pipe, supporting construction is simpler；

This patent fluid passage is to add heat pipe and the gap adding between heat pipe, under steam generator same outer diameter, runner It is bigger that sectional area can do, and under same treatment amount, flow velocity is less, and the residence time of fluid is longer, is more beneficial for fully absorbing heat.

The concrete structure of export department is: a stay tube 302 is arranged in tail pipe 303, the top of a stay tube 302 and heating pipe holder 209 connect, and heating pipe holder 209 plays the effect of axially support.4 discharges it are evenly distributed on the lower sides of tail pipe 303 Mouthful, it is used for discharging high-temperature steam.

In the preferred version of the present embodiment, the sidewall of lower union joint 104 arranges liquid level sensor 105, be used for supervising Level condition in control electrical heating portion.

In the preferred version of the present embodiment, on the sidewall of lower union joint 104 arrange with binding post 201 and under be connected 104 cable transferring heads 106 being all tightly connected, for being connected external cable with the cable in binding post 201.

In the preferred version of the present embodiment, tail pipe 303 bottom mounting temperature sensor 304 and pressure transducer 305, point Yong Lai not monitor the temperature and pressure of steam at outlet.

During use, being connected with assorted column jacket by the upper binding head 101 of inlet portion, electric heating downhole steam generator is lowered into In the Heavy Oil Reservoir section sleeve pipe of target well, cable transferring head 106 connects cable and is energized, the clear water of the injection valve by inlet portion Core 103 decompression after flow into electrical heating 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 is entered by the steam outlet of export department Enter in production string, enter oil reservoir under the effect of the pressure to heavy oil heating viscosity reduction.

High-temperature steam produces in down-hole and is directly injected into oil reservoir, with traditional approach, by steam injection pipe, ground steam is injected well Under method compare, decrease heat loss to the full extent, substantially increase capacity usage ratio, in deep-well and ultradeep well Advantage is especially prominent.

Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new The scope of type each embodiment technical scheme.

Claims (10)

1. an electric heating downhole steam generator, it is characterised in that include inlet portion, the electrical heating being sequentially connected with from top to bottom 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 Many in housing add heat pipe；It is respectively provided with heating wire in adding heat pipe described in each, and adds heat pipe at described heating wire with described Between fill insulating temperature resistant meterial；Add described in each between heat pipe and described in add to be formed between heat pipe and described bringing-up section housing and supply The space that water flows through；

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 for being sequentially connected in series Multiple, connected by housing joint between the described bringing-up section housing of adjacent each section, add between heat pipe described in adjacent each section Connected by heating pipe connector.

Electric heating downhole steam generator the most according to claim 1 and 2, it is characterised in that described electrical heating portion also wraps Include the binding post at top and the heating pipe holder of bottom；The upper end of heat pipe and the described of end section is added most described in each of the section of top The lower end adding heat pipe is tightly connected with described binding post and described heating pipe holder respectively.

Electric heating downhole steam generator the most according to claim 3, it is characterised in that described inlet portion includes connection 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 for being connected with described electrical heating portion；

Described valve seat and described spool are arranged between described upper binding head and described lower union joint, form one way pressure-reducing valve.

Electric heating downhole steam generator the most according to claim 4, it is characterised in that be provided with valve on described valve seat Mouthful；

Described spool is arranged on the described valve seat side near lower union joint, including valve rod, valve head and spring；Described spring housing It is located on described valve rod, described valve head is pressed on described valve seat, 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 ball Face, the sealing surface at the valve port of described valve seat is two sections of conical surfaces with different tapering connected.

Electric heating downhole steam generator the most according to claim 4, it is characterised in that on the sidewall of described lower union joint It is provided with liquid level sensor, for monitoring the liquid level in described electrical heating portion.

Electric heating downhole steam generator the most according to claim 4, it is characterised in that on the sidewall of described lower union joint The cable transferring head being tightly connected with described binding post is set, for being picked out by the cable seal in described binding post.

Electric heating downhole steam generator the most according to claim 2, it is characterised in that described export department include 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 it is equal in the lower sides circumference of described tail pipe The multiple described outlet of cloth；

Described stay tube is arranged in described tail pipe, for described heating pipe holder plays the effect of axially support.

Electric heating downhole steam generator the most according to claim 9, it is characterised in that set on the diapire of described tail pipe Put temperature sensor and pressure transducer.