CN202956353U - Experimental device for annular medium heat insulation effect of hot water drive oil production shaft - Google Patents

Abstract

The utility model discloses a thermal-insulated effect experimental apparatus of hot-water drive oil recovery pit shaft annular space medium, include: the shaft model (1), shaft model (1) have outer steel pipe (11), sleeve pipe (12) and oil pipe (13), and sleeve pipe (12) suit is in outer steel pipe (11), and oil pipe (13) suit is in sleeve pipe (12), is cold water passageway (14) between outer steel pipe (11) and sleeve pipe (12), sleeve pipe (12) with be annular space medium district (15) between oil pipe (13). Belongs to the technical field of heat preservation of oil exploitation mineshafts. The utility model discloses a set up outer steel pipe, sleeve pipe and the well bore model that oil pipe suit in proper order got up for compact structure, with low costs.

Description

Hot waterflooding's mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil

Technical field

The utility model relates to oil exploitation pit shaft heat preservation technology field, particularly a kind of hot waterflooding mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil.

Background technology

Thermal recovery is the main oil production method of domestic and international heavy crude reservoir exploitation, and the hot waterflooding belongs to a kind of important method in thermal recovery.Hot waterflooding's oil-displacement mechanism is mainly by injecting crude oil temperature in hot water rising stratum, reduce the viscosity of crude oil, reduce resistance to flow, improving oil recovery factor.Therefore the temperature of hot water is to affect the key factor that the hot water drive exploits benefit, and effectively the thermally insulating the borehole measure is most important to improving the shaft bottom hot water temperature.

At present, the common employing of petroleum well is the thermally insulating the borehole method that insulated tubing adds packer.Such as, some Oilfield using directly are filled with the thermally insulating the borehole technology of gas with various to the annular space of oil pipe and sleeve pipe, change the heat transfer resistance of annular space by the medium physical property in the change annular space, and this has obtained certain effect in the well of steam treatment.Be that the Chinese utility model patent that " ZL 20042011524.X ", name are called " concentric oil pipe wellbore nitrogen-filling thermal insulation limit testing device " discloses a kind of concentric oil pipe wellbore nitrogen-filling thermal insulation limit testing device as the patent No., the wellbore model of this device and actual steamed well geometric similarity, cost is high, complicated structure.Comparing with steamed well, be single-phase flowing in hot water injection well, and in pit shaft, temperature is more much lower than steamed well, so the effect of heat insulation in hot-water flooding pit shaft annular space is different from steamed well.

Because the hot waterflooding is a kind of common technique in thermal recovery, however the essence effect that does not also have ripe experience and can certainly predict for hot waterflooding's mineshaft annulus provision for thermal insulation effect at present; And because situation complexity and the cost at scene are high, if field experiment is carried out in the annular space provision for thermal insulation, not only invest large and be difficult to analyze different annular space media to the impact of effect of heat insulation, therefore obtaining hot-water flooding pit shaft annular space effect of heat insulation by the chamber physical simulation has important engineering significance and using value.

In realizing process of the present utility model, the inventor finds that there is following problem at least in prior art: the existing thermally insulating the borehole method that adopts insulated tubing to add packer, its complicated operation, cost are very high and be only applicable to the well of new exploitation, for the old well that has existed, be the well that shaft structure has been determined, but also inapplicable.

The utility model content

In order to solve the problem of prior art, the utility model embodiment provides a kind of hot waterflooding the mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil.This experimental provision compact conformation, cost are low, can realize different annular space media and the heat insulation effect of water filling operating mode well-sinking, determine the feasibility of relevant provision for thermal insulation, the factor that the oil jacket annular space coefficient of heat transfer changes and affect effect of heat insulation.Described technical scheme is as follows:

A kind of hot waterflooding mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, described experimental provision comprises: wellbore model, described wellbore model has outer layer pipe, sleeve pipe and oil pipe, described casing pipe sleeve is contained in described outer layer pipe, described oil pipe is sleeved in described sleeve pipe, being cold water channel between described outer layer pipe and described sleeve pipe, is the annular space dielectric area between described sleeve pipe and described oil pipe.The two ends of described outer layer pipe are fixed with the first steel pipe flange and the second steel pipe flange respectively, and the two ends of described sleeve pipe are fixed with first set pipe flange and the second casing flange respectively, and the two ends of described oil pipe are fixed with the first oil pipe flange and the second oil pipe flange respectively.Described first set pipe flange and described the second casing flange are set in respectively in described the first steel pipe flange and described the second steel pipe flange, and described the first oil pipe flange and described the second oil pipe flange are set in respectively in described first set pipe flange and described the second casing flange.

Further, be provided with the steel pipe water injection hole on described the first steel pipe flange, be provided with the sleeve pipe water injection hole on described first set pipe flange, described steel pipe water injection hole and described sleeve pipe water injection hole connect mutually; Be provided with the steel pipe apopore on described the second steel pipe flange, be provided with the sleeve pipe apopore on described the second casing flange, described steel pipe apopore and described sleeve pipe apopore connect mutually.

Further, be provided with the sleeve pipe injecting hole on described first set pipe flange, be provided with the oil pipe injecting hole on described the first oil pipe flange, described sleeve pipe injecting hole and described oil pipe injecting hole connect mutually; Be provided with the sleeve pipe venthole on described the second casing flange, be provided with the oil pipe venthole on described the second oil pipe flange, described sleeve pipe venthole and described oil pipe venthole connect mutually.

Further, the maximum outside diameter of described the second oil pipe flange is less than or equal to the minimum diameter of described first set pipe flange; The maximum outside diameter of described the second casing flange is less than or equal to the minimum diameter of described the first steel pipe flange.

Further, weldering is provided with thermocouple wire on the tube wall of described oil pipe, and described thermocouple wire reaches outside described wellbore model in the pipe of described oil pipe.

Further, described wellbore model also has heat-insulation layer, described heat-insulation layer wraps the periphery at described outer layer pipe, and the two ends of described heat-insulation layer are provided with the heat-insulation layer mounting flange, and described heat-insulation layer mounting flange is fixedly connected with described the second steel pipe flange with described the first steel pipe flange.

Further, described experimental provision also comprises: hot water cyclesystem, cold water circulating system and data Collection ﹠ Processing System, described hot water cyclesystem be connected cold water circulating system and be connected with described wellbore model pipeline, described wellbore model, described hot water cyclesystem and the cold water circulating system of being connected are connected with described data Collection ﹠ Processing System data.

Further, described hot water cyclesystem comprises buffer tank, centrifugal pump, hot water flow meter, primary heater and refrigeratory, described buffer tank is connected with the water side pipeline of described oil pipe through described refrigeratory, and described buffer tank is connected with the water inlet end pipeline of described oil pipe through described centrifugal pump, described hot water flow meter and the primary heater of being connected successively.

Further, described cold water circulating system comprises water tank, pump and cold water flow meter, described water tank successively through described pump be connected the cold water flow meter and be connected with the water inlet end pipeline of described cold water channel, described water tank is connected with the water side pipeline of described cold water channel.

The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:

The wellbore model that is set with successively by outer layer pipe, sleeve pipe and oil pipe are set makes compact conformation, cost low; By the circular flow in this wellbore model with hot water and cold water, and by data Collection ﹠ Processing System Monitoring Data and processing, make measurement more accurate.On the other hand, the hot waterflooding of the present utility model mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil can be realized in different gas injection operating modes and the heat insulation medium situation of different annular space, hot water is to the PHYSICAL MODELING OF IN of wellbore heat process, heat dissipation capacity by the oil jacket annular space coefficient of heat transfer and hot water is carried out comprehensive evaluation to different oil jacket annular space media, is conducive to choosing of efficient water-heating oil recovery mineshaft annulus provision for thermal insulation.Moreover this hot waterflooding mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil can be applicable to the old well that shaft structure has been determined.

Description of drawings

In order to be illustrated more clearly in the technical scheme in the utility model embodiment, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of the wellbore model that provides of the utility model embodiment one;

Fig. 2 is that the system of the experimental provision that provides of the utility model embodiment two consists of schematic diagram.

Embodiment

For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.

Embodiment one

The present embodiment provides a kind of hot waterflooding the mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, this experimental provision comprises wellbore model 1, and referring to Fig. 1, this wellbore model 1 has outer layer pipe 11, sleeve pipe 12 and oil pipe 13, sleeve pipe 12 is sleeved in outer layer pipe 11, and oil pipe 13 is sleeved in sleeve pipe 12.The external diameter of sleeve pipe 12 is less than the internal diameter of outer layer pipe 11, and sleeve pipe 12 and the coaxial setting of outer layer pipe 11 like this, form cyclic water jacket between the inwall of the periphery of sleeve pipe 12 and outer layer pipe 11, and the gap between outer layer pipe 11 and sleeve pipe 12 is defined as cold water channel 14.The external diameter of oil pipe 13 is less than the internal diameter of sleeve pipe 12, and oil pipe 13 and the coaxial setting of sleeve pipe 12 like this, form annular areas of dielectric between the inwall of the periphery of oil pipe 13 and sleeve pipe 12, and the annular space zone definitions between sleeve pipe 12 and oil pipe 13 is annular space dielectric area 15.

The two ends of outer layer pipe 11 are fixing with the first steel pipe flange 111 and the second steel pipe flange 112 respectively, the two ends of sleeve pipe 12 are fixing with first set pipe flange 121 and the second casing flange 122 respectively, and the two ends of oil pipe 13 are fixing with the first oil pipe flange 131 and the second oil pipe flange 132 respectively.Be fixedly connected by welding between outer layer pipe 11 and the first steel pipe flange 111 and the second steel pipe flange 112, as other embodiment, also can be bolted to connection between outer layer pipe 11 and the first steel pipe flange 111 and the second steel pipe flange 112.All that mode by welding is fixedly connected with between oil pipe 13 and the first oil pipe flange 131 and the second oil pipe flange 132 equally, between sleeve pipe 12 and first set pipe flange 121 and the second casing flange 122.Wherein, the first steel pipe flange 111 is identical with the version of the second steel pipe flange 112, but the counter structure size is unequal; First set pipe flange 121 is identical with the version of the second casing flange 122, but the counter structure size is unequal; The first oil pipe flange 131 is identical with the version of the second oil pipe flange 132, but the counter structure size is unequal.Be provided with mutually adaptive shoulder overlap joint position between first set pipe flange 121 and the first steel pipe flange 111, first set pipe flange 121 is set in the first steel pipe flange 111, both realize axis location by overlap joint shoulder each other, first set pipe flange 121 and the first steel pipe flange 111 can arrange O-ring seal, fluid sealant etc. according to actual conditions and realize sealing.Be provided with mutually adaptive shoulder overlap joint position between the second casing flange 122 and the second steel pipe flange 112, the second casing flange 122 is set in the second steel pipe flange 112, both realize axis location by overlap joint shoulder each other, also be provided with O-ring seal between the second casing flange 122 and the second steel pipe flange 112 and realize radial seal.In like manner, the first oil pipe flange 131 and the second oil pipe flange 132 are set in respectively in first set pipe flange 121 and the second casing flange 122.

Be provided with steel pipe water injection hole 1111 on the first steel pipe flange 111, be provided with sleeve pipe water injection hole 1211 on first set pipe flange 121, steel pipe water injection hole 1111 and sleeve pipe water injection hole 1211 connect mutually, like this, circulating water is injected in cold water channel 14 by steel pipe water injection hole 1111 and sleeve pipe water injection hole 1211.Steel pipe water injection hole 1111 and sleeve pipe water injection hole 1211 are a plurality of along circumferentially arranging accordingly on the first steel pipe flange 111 and first set pipe flange 121, are preferably six or eight.Be provided with steel pipe apopore 1121 on the second steel pipe flange 112, be provided with sleeve pipe apopore 1221 on the second casing flange 122, steel pipe apopore 1121 and sleeve pipe apopore 1221 connect mutually, and cold water channel 14 is interior discharges outside cold water channel 14 through steel pipe apopore 1121 and sleeve pipe apopore 1221 through the water after circulation.Equally, steel pipe apopore 1121 and sleeve pipe apopore 1221 are a plurality of along circumferentially arranging accordingly on the second steel pipe flange 112 and the second casing flange 122, are preferably six or eight.

Be provided with sleeve pipe injecting hole 1212 on first set pipe flange 121, be provided with oil pipe injecting hole 1311 on the first oil pipe flange 131, sleeve pipe injecting hole 1212 and oil pipe injecting hole 1311 connect mutually, like this, the annular space medium is injected in annular space dielectric area 15 by sleeve pipe injecting hole 1212 and oil pipe injecting hole 1311, and this annular space medium is generally gas.Sleeve pipe injecting hole 1212 and oil pipe injecting hole 1311 are provided with a plurality of on first set pipe flange 121 and the first oil pipe flange 131 accordingly.Be provided with sleeve pipe venthole 1222 on the second casing flange 122, be provided with oil pipe venthole 1321 on the second oil pipe flange 132, sleeve pipe venthole 1222 and oil pipe venthole 1321 connect mutually, and the annular space medium is discharged from outside annular space dielectric area 15 by sleeve pipe venthole 1222 and oil pipe venthole 1321.

The maximum outside diameter of the second oil pipe flange 132 is less than or equal to the minimum diameter of first set pipe flange 121, like this, when needing repairing, oil pipe 13 can be extracted out the convenient for maintaining checkout equipment from first set pipe flange 121 together with the first oil pipe flange 131 and the second oil pipe flange 132.The maximum outside diameter of the second casing flange 122 is less than or equal to the minimum diameter of the first steel pipe flange 111, when needing repairing equipment, sleeve pipe 12 can be extracted out from the first steel pipe flange 111 together with first set pipe flange 121 and the second casing flange 122 equally.

Preferably, weldering is provided with thermocouple wire 16 on the tube wall of oil pipe 13, and thermocouple wire 16 reaches in the pipe of oil pipe 13 outside wellbore model 1, and thermocouple wire 16 data Collection ﹠ Processing System 4 data outer with being arranged on wellbore model 1 are connected.The diverse location weldering is provided with many thermocouple wires 16 on the tube wall of oil pipe 13, to measure the temperature at the different tube walls of oil pipe 13 place.

Preferably, this wellbore model 1 also has heat-insulation layer 17, heat-insulation layer 17 wraps the periphery at outer layer pipe 11, and the two ends of heat-insulation layer 17 are provided with heat-insulation layer mounting flange 171, and heat-insulation layer mounting flange 171 is fixedly connected with the second steel pipe flange 112 with described the first steel pipe flange 111.

Embodiment two

The present embodiment provides a kind of hot waterflooding the mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, referring to Fig. 1 and Fig. 2, this experimental provision comprises: wellbore model 1, hot water cyclesystem 2, cold water circulating system 3 and data Collection ﹠ Processing System 4, hot water cyclesystem 2 is connected with cold water circulating system and is connected with wellbore model 1 pipeline, and wellbore model 1, hot water cyclesystem 2 are connected with cold water circulating system and are connected with data Collection ﹠ Processing System 4 data.Wherein, that describes in the composition and structure of wellbore model 1 and embodiment one is consistent, no longer is repeated in this description at this.

This hot water cyclesystem 2 comprises buffer tank 21, centrifugal pump 22, hot water flow meter 23, primary heater 24 and refrigeratory 25, buffer tank 21 is connected with the water side pipeline of oil pipe 13 through subcooler 25, and buffer tank 21 passes through centrifugal pump 22 successively, hot water flow meter 23 is connected with primary heater is connected with the water inlet end pipeline of oil pipe 13.Like this, hot water cyclesystem 2 is injected hot water in oil pipe 13, and centrifugal pump 22 is for increasing the pressure of hot water, and hot water flow meter 23 is used for measuring the flow that injects hot water to oil pipe 13, and 24 pairs of water of primary heater heat, to reach predetermined temperature.The hot water of discharging from oil pipe 13 is back to after refrigeratory 25 is cooling in buffer tank 21, to recycle.Preferably, also be provided with filtrator at the water delivering orifice of buffer tank 21, be injected into hot water in oil pipe 13 with purification.Be provided with pressure unit on the water inlet end pipeline of primary heater 24 and oil pipe 13, this pressure unit is connected with data Collection ﹠ Processing System 4.

Cold water circulating system 3 comprises water tank 31, pump 32 and cold water flow meter 33, and water tank 31 is connected with the cold water flow meter and is connected with the water inlet end pipeline of cold water channel 14 through pump 32 successively, and water tank 31 is connected with the water side pipeline of cold water channel 14.Cold water in water tank 31 is injected in cold water channel 14 by pump 32 and cold water flow meter 33, is discharged in water tank 31 by connecting tube after recycling in cold water channel 14.

Data Collection ﹠ Processing System 4 is used for gathering respectively organizes experimental data in wellbore model 1, controls the water injection rate of hot water cyclesystem 2 and cold water circulating system 3, and controls the temperature of injecting hot water.

With this hot waterflooding method that mineshaft annulus medium effect of heat insulation experimental provision measures mineshaft annulus medium effect of heat insulation of recovering the oil be:

At first measure the coefficient of heat transfer of annular space medium in the annular space dielectric area 15 of wellbore model 1, in conjunction with Fig. 1 and Fig. 2.Experimental section length is the hot water temperature T of L, oil pipe 13 porch _hi, oil pipe 13 exits hot water temperature T _ho, oil pipe 13 porch pressure p _in, the internal-and external diameter of oil pipe 13 is respectively d _tiAnd d _to, the internal-and external diameter of sleeve pipe 12 is respectively d _ciAnd d _co, the temperature of five points that measurement is equally spaced along its length on the outer wall of oil pipe 13 is respectively t _h1, t _h2, t _h3, t _h4, t _h5, measuring accordingly on sleeve pipe 12 inwalls axially, 5 of corresponding positions temperature is t _c1, t _c2, t _c3, t _c4, t _c5

The heat dissipation capacity Φ of annular space medium _anBe the quantity of heat convection Φ _cWith Radiant exothermicity Φ _rSum, that is:

Φ _an=Φ _r+Φ _c （1）

The quantity of heat convection Φ _c:

Φ _cj=h _cj(πd _toL)(t _hj-t _cj) （2）

Wherein, t _hjBe the temperature that oil-pipe external wall records, j=1,2,3,4,5, t _cjBe the temperature that measures on sleeve pipe 12 inwalls.

According to cylinder radiation heat transfer formula, can get Radiant exothermicity Φ _r:

${\mathrm{\Φ}}_{\mathrm{rj}}=h_{\mathrm{rj}}\left({\mathrm{\πd}}_{\mathrm{to}}L\right)(t_{\mathrm{hj}}-t_{\mathrm{cj}})=\frac{\mathrm{\σ}(t_{\mathrm{hj}}^4-t_{\mathrm{cj}}^4)\left({\mathrm{\πd}}_{\mathrm{to}}L\right)}{\frac{1}{{\mathrm{\ϵ}}_{\mathrm{to}}}+\frac{d_{\mathrm{to}}/2}{d_{\mathrm{ci}}/2}(\frac{1}{{\mathrm{\ϵ}}_{\mathrm{ci}}}-1)}---\left(3\right)$

According to formula (3), can get radiation heat transfer coefficient and be:

$h_{\mathrm{rj}}=\frac{\mathrm{\σ}(t_{\mathrm{hj}}^2-t_{\mathrm{cj}}^2)(t_{\mathrm{hj}}+t_{\mathrm{cj}})}{\frac{1}{{\mathrm{\ϵ}}_{\mathrm{to}}}+\frac{d_{\mathrm{to}}/2}{d_{\mathrm{ci}}/2}(\frac{1}{{\mathrm{\ϵ}}_{\mathrm{ci}}}-1)}---\left(4\right)$

The coefficient of heat transfer total in annular space dielectric area 15 is:

h _an=h _r+h _c (5)

In the oil pipe 13 of wellbore model 1, the heat dissipation capacity of hot fluid is:

${\mathrm{\Φ}}_{\mathrm{tub}}=c_w({\mathrm{\ρ}}_w{\mathrm{\πd}}_{\mathrm{ci}}^{2}L/4)(T_{\mathrm{hi}}-T_{\mathrm{ho}})---\left(6\right)$

Do not consider axial heat radiation, only consider the radially heat radiation of hot water, hot water equates along wellbore model 1 heat dissipation capacity radially:

$h_{\mathrm{anj}}\left({\mathrm{\πd}}_{\mathrm{to}}L\right)(t_{\mathrm{hj}}-t_{\mathrm{cj}})=c_w({\mathrm{\ρ}}_w\mathrm{\π}{d}_{\mathrm{ci}}^{2}L/4)(T_{\mathrm{hi}}-T_{\mathrm{ho}})---\left(7\right)$

C wherein _wAnd ρ _wBe respectively the density of specific heat at constant pressure and the water of water.

The coefficient of heat transfer of the annular space dielectric area 15 between oil pipe 13 and sleeve pipe 12 is:

$h_{\mathrm{anj}}=\frac{c_w{\mathrm{\ρ}}_w{d}_{\mathrm{ci}}^2(T_{\mathrm{hi}}-T_{\mathrm{ho}})}{{4d}_{\mathrm{to}}(t_{\mathrm{hj}}-t_{\mathrm{cj}})}---\left(8\right)$

Average heat transfer coefficient is:

$h_{\mathrm{an}}=\frac{1}{L}{\∫}_0^L{h}_{\mathrm{anj}}\mathrm{dz}---\left(9\right)$

Like this, the coefficient of heat transfer and the hot water temperature difference (T by the annular space dielectric area 15 between oil pipe 13 and sleeve pipe 12 _hi-T _ho) effect of heat insulation of more different annular space media.

For different annular space media, concrete experimental technique is:

The first step is opened the centrifugal pump 22 of hot water cyclesystem 2, is adjusted to predetermined amount of flow, and beginning is injected hot water in oil pipe 13;

Second step is opened primary heater 24, regulates the primary heater heating power by temperature controller and makes hot water reach the implantation temperature of setting;

In the 3rd step, the water pump 32 of open cold water circulation system 3 is adjusted to predetermined amount of flow, is filled with cold water in the cold water channel 14 between outer layer pipe 11 and sleeve pipe 12;

The 4th step began to carry out the experimental data collection after experiment condition is basicly stable, to this pressure p of flow, oil pipe 13 porch constantly _in, oil pipe 13 porch hot water temperature T _hiHot water temperature T with oil pipe 13 exits _ho, oil pipe 13 outside wall surface temperature t _hjWith sleeve pipe 12 internal face temperature t _cjDeng measuring in real time and record;

In the 5th step, according to the parameter that measures, calculate the heat dissipation capacity Φ of hot water under operating mode by formula (1) ~ (9) _tubAnd the coefficient of heat transfer h of annular space medium _an

The 6th step, regulate the flow of hot water cyclesystem, repeat from step (1), can obtain the hot water heat dissipation capacity Φ under different hot water flows _tubAnd the coefficient of heat transfer h of annular space medium _an

In the 7th step, the heating power of control primary heater repeats from step (2), can obtain the hot water heat dissipation capacity Φ under different entrance hot water temperatures _tubReach the coefficient of heat transfer h of gas in annular space _an

In the 8th step, if measure different tested annular space media, restart to get final product from step (1).

Above-mentioned the utility model embodiment sequence number does not represent the quality of embodiment just to description.

The above is only preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims (9)

1. hot waterflooding mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, described experimental provision comprises: wellbore model (1) is characterized in that:

Described wellbore model (1) has outer layer pipe (11), sleeve pipe (12) and oil pipe (13), described sleeve pipe (12) is sleeved in described outer layer pipe (11), described oil pipe (13) is sleeved in described sleeve pipe (12), being cold water channel (14) between described outer layer pipe (11) and described sleeve pipe (12), is annular space dielectric area (15) between described sleeve pipe (12) and described oil pipe (13);

The two ends of described outer layer pipe (11) use respectively the first steel pipe flange (111) and the second steel pipe flange (112) to fix, the two ends of described sleeve pipe (12) use respectively first set pipe flange (121) and the second casing flange (122) to fix, and the two ends of described oil pipe (13) use respectively the first oil pipe flange (131) and the second oil pipe flange (132) to fix;

Described first set pipe flange (121) and described the second casing flange (122) are set in respectively in described the first steel pipe flange (111) and described the second steel pipe flange (112), and described the first oil pipe flange (131) and described the second oil pipe flange (132) are set in respectively in described first set pipe flange (121) and described the second casing flange (122).

2. the hot waterflooding according to claim 1 mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, it is characterized in that, be provided with steel pipe water injection hole (1111) on described the first steel pipe flange (111), be provided with sleeve pipe water injection hole (1211) on described first set pipe flange (121), described steel pipe water injection hole (1111) and described sleeve pipe water injection hole (1211) connect mutually;

Be provided with steel pipe apopore (1121) on described the second steel pipe flange (112), be provided with sleeve pipe apopore (1221) on described the second casing flange (122), described steel pipe apopore (1121) and described sleeve pipe apopore (1221) connect mutually.

3. the hot waterflooding according to claim 1 mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, it is characterized in that, be provided with sleeve pipe injecting hole (1212) on described first set pipe flange (121), be provided with oil pipe injecting hole (1311) on described the first oil pipe flange (131), described sleeve pipe injecting hole (1212) and described oil pipe injecting hole (1311) connect mutually;

Be provided with sleeve pipe venthole (1222) on described the second casing flange (122), be provided with oil pipe venthole (1321) on described the second oil pipe flange (132), described sleeve pipe venthole (1222) and described oil pipe venthole (1321) connect mutually.

4. the hot waterflooding according to claim 1 mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, is characterized in that, the maximum outside diameter of described the second oil pipe flange (132) is less than or equal to the minimum diameter of described first set pipe flange (121); The maximum outside diameter of described the second casing flange (122) is less than or equal to the minimum diameter of described the first steel pipe flange (111).

5. the hot waterflooding according to claim 1 mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, it is characterized in that, weldering is provided with thermocouple wire (16) on the tube wall of described oil pipe (13), and described thermocouple wire (16) reaches in the pipe of described oil pipe (13) outside described wellbore model (1).

6. the hot waterflooding according to claim 1 mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, it is characterized in that, described wellbore model (1) also has heat-insulation layer (17), described heat-insulation layer (17) wraps the periphery in described outer layer pipe (11), the two ends of described heat-insulation layer (17) are provided with heat-insulation layer mounting flange (171), and described heat-insulation layer mounting flange (171) is fixedly connected with described the second steel pipe flange (112) with described the first steel pipe flange (111).

7. the described hot waterflooding of any one mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil according to claim 1 to 6, it is characterized in that, described experimental provision also comprises: hot water cyclesystem (2), cold water circulating system (3) and data Collection ﹠ Processing System (4), described hot water cyclesystem (2) be connected cold water circulating system (3) and be connected with described wellbore model (1) pipeline, described wellbore model (1), described hot water cyclesystem (2) and the cold water circulating system (3) of being connected are connected with described data Collection ﹠ Processing System (4) data.

8. the hot waterflooding according to claim 7 mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, it is characterized in that, described hot water cyclesystem (2) comprises buffer tank (21), centrifugal pump (22), hot water flow meter (23), primary heater (24) and refrigeratory (25), described buffer tank (21) is connected with the water side pipeline of described oil pipe (13) through described refrigeratory (25), described buffer tank (21) passes through described centrifugal pump (22) successively, described hot water flow meter (23) be connected the water inlet end pipeline of primary heater (24) with described oil pipe (13) and be connected.

9. the hot waterflooding according to claim 7 mineshaft annulus medium effect of heat insulation experimental provision that recovers the oil, it is characterized in that, described cold water circulating system (3) comprises water tank (31), pump (32) and cold water flow meter (33), described water tank (31) passes through successively described pump (32) and is connected the water inlet end pipeline of cold water flow meter (33) with described cold water channel (14) and is connected, and described water tank (31) is connected with the water side pipeline of described cold water channel (14).

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