A thermal insulation and telescopic device for heavy oil injection and production

Abstract

The present invention discloses a heat-insulating telescopic device for heavy oil injection and production, which relates to the technical field of oil production operations. It optimizes the process of pumping high-temperature steam in heavy oil thermal recovery technology. Based on heat-insulating tubing, the end position thereof is improved to obtain a pressure-passive telescopic structure. First, the kinetic energy sleeve is driven to rotate at a constant speed and in a fixed direction by the air pressure of pumping high-temperature steam. On the one hand, the steam pressure is initially reduced. The key is to utilize the vibration sensation generated by the impact ball when the curved connecting rod rotates. The vibration effect can promote the heat exchange between steam and heavy oil and accelerate the transfer of steam heat to the deep formation. Secondly, the slip ring sleeve group is driven to perform adaptive sliding again by the steam pressure. Its essence is that during the indefinite sliding process of the kinetic energy sleeve, the steam pumping position is changed in a manner similar to a telescopic action, which is based on reducing the negative impact of steam pressure on the bottom structure and mainly avoiding the problem of "high-pressure accumulation".

Description

Technical Field

[0001] The present invention relates to the technical field of oil production operations, and particularly relates to a heat insulation and telescopic device for heavy oil injection and production. Background Technique

[0002] As an optimized technology for conventional oil extraction, the heavy oil thermal recovery technology can refer to the relevant content involved in the publication number CN105626021A. Its essence is to inject high-temperature and high-pressure steam into the heavy oil layer, and use heat to reduce the viscosity of the heavy oil and improve its fluidity. Specifically, it utilizes the high heat insulation performance and structural characteristics of the heat insulation tubing.

[0003] Taking the supercritical steam technology (publication number CN110043235A) as an example, the heating range can be expanded to reduce the impact of local high-pressure concentration on the formation. However, the environment of the heavy oil layer is relatively complex. Taking in-situ production as an example, there is a conversion between the vapor phase and the liquid phase after pumping in steam. Especially in the initial stage of steam flooding, the steam phase occupies the pore space and forms a displacement driving force, resulting in a significant increase in local pressure. The liquid water formed by steam condensation will increase the formation fluid saturation and reduce the steam permeability, which may cause a decrease in the pressure conduction efficiency, resulting in uneven formation pressure distribution. Thus, it is manifested as obvious pressure fluctuations at the injection well and the production well, and there are problems such as the formation rock expanding due to heat, causing uneven local stress distribution, and possibly inducing formation deformation or casing damage. If steam is pumped in with constant parameters (steam temperature, flow rate, and flow), it will exacerbate the non-uniformity of the formation structure or the pressure environment in the heavy oil layer. For this, the present invention proposes a solution. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat insulation and telescopic device for heavy oil injection and production. For the process of pumping steam in heavy oil exploitation, because there is a conversion process between the vapor phase and the liquid phase, there are accompanying changes in pressure and temperature. Especially when forming a hot water zone (liquid phase), there are obvious pressure fluctuations, which exacerbate the uneven stress distribution in the heavy oil layer and the formation structure, and may induce problems such as formation deformation or casing damage.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A heat insulation and telescopic device for heavy oil injection and production is applied at the end position of the heat insulation tubing, and includes an outer casing, a kinetic energy casing, an inner casing, and a fixed casing. The inner casing is arranged between the inner wall of the outer casing and the outer wall of the kinetic energy casing. On the outer wall of the kinetic energy casing, there is a set of slip ring sleeves linearly and equidistantly arranged along the length direction of the outer casing, and the kinetic energy casing is provided with inner leakage grooves corresponding to the set of slip ring sleeves;

[0006] The set of slip ring sleeves is composed of an elastic ring and two slip cylinders. The elastic ring is installed in the middle position between the two slip cylinders. The slip cylinders are sleeved on the outer wall of the kinetic energy casing, and a steam leakage cavity is provided on the inner wall of the slip cylinder far away from the elastic ring;

[0007] A block corresponding to the internal leakage groove and the steam discharge cavity is arranged between the outer wall of the kinetic energy sleeve and the inner wall of the outer sleeve. A passive pressing piece is arranged on the block in the direction corresponding to the inner wall of the outer sleeve. A limiting sleeve corresponding to the block is installed on the inner sleeve.

[0008] It is further set that: a fixed seat is installed at the position of the inner wall of one end of the outer sleeve. The fixed seat is fixedly connected to the fixed sleeve, and the fixed seat is fixedly connected to the inner sleeve. A vortex fan group is arranged between the fixed sleeve and the kinetic energy sleeve. The kinetic energy sleeve is rotationally connected to the fixed sleeve through the vortex fan group, and the kinetic energy sleeve is rotationally connected to the inner sleeve through the vortex fan group.

[0009] It is further set that: the vortex fan group is composed of a vortex fan rod, a curved connecting rod and two support rings. The two support rings are respectively installed at the positions of the inner walls of the fixed sleeve and the kinetic energy sleeve. The vortex fan rod is rotationally connected to the support ring in the fixed sleeve and is fixedly connected to the support ring in the kinetic energy sleeve.

[0010] It is further set that: both ends of the curved connecting rod are respectively installed on the vortex fan rod and the kinetic energy sleeve, and the curved connecting rod is in a continuous right-angled bending shape. A collar is rotationally installed at the horizontal position of the curved connecting rod, and a collision ball group is installed under the collar.

[0011] It is further set that: springs corresponding to the sliding ring sleeve groups are installed at the internal positions of both ends of the inner sleeve.

[0012] It is further set that: the steam discharge cavities in two adjacent positions form a steam discharge ring, and the cross-section of the steam discharge ring is in a curved arch shape along the direction deviating from the outer sleeve.

[0013] It is further set that: the lower end of the limiting sleeve is matched with the steam discharge ring. A notch corresponding to the limiting sleeve is opened on the sliding cylinder. A guide rod is installed on the block. The passive pressing piece is matched with the inner wall of the outer sleeve, and the passive pressing piece is connected to the block through the guide rod. Both ends of the guide rod are slidably connected to the outer sleeve and the kinetic energy sleeve respectively.

[0014] It is further set that: the steam discharge cavity is arranged at the middle position of the internal leakage groove.

[0015] The present invention has the following beneficial effects:

[0016] 1. Based on the improvement of the heat-insulating tubing in the heavy oil thermal recovery process, the device proposed by the present invention is mainly installed at the end position of the heat-insulating tubing and serves as a steam pumping structure. Specifically, the kinetic energy sleeve inside is improved. The kinetic energy sleeve can rotate relative to the fixed sleeve, and driven by the air pressure when steam is pumped in and based on the eddy current fan group, the kinetic energy sleeve rotates at a constant speed and in a fixed direction. On the one hand, it is used to reduce the pressure of high-temperature steam pumped into the heavy oil layer. On the other hand, it mainly cooperates with the curved connecting rod that rotates synchronously with the eddy current fan group. When the curved connecting rod rotates synchronously, the billiard ball group inside will impact the kinetic energy sleeve randomly to generate vibration force, and the vibration force is transmitted to the heavy oil layer through the vibration sensing transmission process of the overall structure. The vibration may promote the more uniform mixing of steam and heavy oil through physical disturbance, similar to how a swirl mixing device improves the contact efficiency between the viscosity reducer and crude oil by stirring, and can also promote the heat exchange between steam and heavy oil, accelerating the transfer of steam heat to the deep part of the formation;

[0017] 2. The key lies in the slip ring sleeve group arranged on the outer wall of the kinetic energy sleeve. The sliding cylinders on it can slide on the outer wall of the kinetic energy sleeve, but under the action of springs and elastic rings, each slip ring sleeve group is kept in contact with each other, so as to form a steam discharge ring with a steam discharge cavity. The high-temperature steam pumped into the kinetic energy sleeve can only be pumped out from the internal discharge groove and retained in the steam discharge ring. The pressure when steam is pumped in is used again to drive the sliding cylinders to perform random sliding actions, which can further consume the pressure of the high-temperature steam pumped in. The key is that when cooperating with high-temperature steam, each slip ring sleeve group forms a telescopic-like action to change the steam pumping position from the kinetic energy sleeve. Its key purpose is to avoid the "high-pressure accumulation" at local positions on the outer wall of the outer sleeve when continuously pumping out steam, and "distribute" the high-temperature steam pumping pressure through the method of "lowering the excessive", reducing the negative impact on the heavy oil layer and even the bottom layer caused by uneven local stress distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a heavy oil injection and production heat-insulating telescopic device proposed by the present invention;

[0020] Figure 2 It is a schematic internal structure diagram of the outer sleeve in the present invention;

[0021] Figure 3 In the present invention Figure 1 sectional view;

[0022] Figure 4 For the present invention Figure 2 Internal structure schematic diagram of the inner sleeve in the present invention;

[0023] Figure 5 Exploded view of the slip ring sleeve group in the present invention;

[0024] Figure 6 For the present invention Figure 3 Enlarged schematic view of part A in the present invention;

[0025] Figure 7 For the present invention Figure 3 Enlarged schematic view of part B in the present invention.

[0026] In the figure: 1. Outer sleeve; 2. Inner sleeve; 3. Kinetic energy sleeve; 301. Internal leakage groove; 4. Fixed seat; 5. Eddy current fan group; 6. Fixed sleeve; 7. Curved connecting rod; 8. Billiard ball group; 9. Spring; 10. Slip ring sleeve group; 1001. Slip cylinder; 1002. Elastic ring; 1003. Steam discharge cavity; 11. Passive pressing piece; 12. Plug; 13. Restricting sleeve. Specific embodiments

[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1: For the process of steam pumping in heavy oil exploitation, since there is a conversion process between the vapor phase and the liquid phase, there are accompanying changes in pressure and temperature. Especially when forming a hot water zone (liquid phase), there are obvious pressure fluctuations, which exacerbate the uneven stress distribution in the heavy oil layer and the formation structure, and may induce problems such as formation deformation or casing damage. Therefore, the following technical solutions are proposed:

[0029] Refer to Figures 1-7 , in this embodiment, a heavy oil injection and production heat insulation telescopic device is applied to the end position of the heat insulation oil pipe, including an outer sleeve 1, a kinetic energy sleeve 3, an inner sleeve 2 and a fixed sleeve 6. The inner sleeve 2 is arranged between the inner wall of the outer sleeve 1 and the outer wall of the kinetic energy sleeve 3. On the outer wall of the kinetic energy sleeve 3, a slip ring sleeve group 10 is linearly and equidistantly arranged along the length direction of the outer sleeve 1, and an internal leakage groove 301 corresponding to the slip ring sleeve group 10 is opened on the kinetic energy sleeve 3;

[0030] The slip ring set 10 is composed of an elastic ring 1002 and two slip cylinders 1001. The elastic ring 1002 is installed at the middle position between the two slip cylinders 1001. The slip cylinders 1001 are sleeved on the outer wall of the kinetic energy sleeve 3, and a steam discharge cavity 1003 is formed on the inner wall of the slip cylinder 1001 far away from the elastic ring 1002.

[0031] A block 12 corresponding to the inner discharge groove 301 and the steam discharge cavity 1003 is arranged between the outer wall of the kinetic energy sleeve 3 and the inner wall of the outer sleeve 1. A passive pressing piece 11 is arranged in the direction of the inner wall of the outer sleeve 1 corresponding to the block 12. A limiting sleeve 13 corresponding to the block 12 is installed on the inner sleeve 2. A fixed seat 4 is installed at one end inner wall position of the outer sleeve 1. The fixed seat 4 is fixedly connected to the fixed sleeve 6 and the fixed seat 4 is fixedly connected to the inner sleeve 2. A vortex fan group 5 is arranged between the fixed sleeve 6 and the kinetic energy sleeve 3. The kinetic energy sleeve 3 is rotationally connected to the fixed sleeve 6 through the vortex fan group 5, and the kinetic energy sleeve 3 is rotationally connected to the inner sleeve 2 through the vortex fan group 5.

[0032] Basic principle: A simple description of heavy oil thermal recovery is as follows: By injecting high-temperature steam or hot water (usually in the temperature range of 150 - 350 °C) into the formation, the heat energy is transferred to the heavy oil layer, which promotes the decrease in the viscosity of the crude oil and makes it separate from the rock surface. At the same time, the thermal expansion effect of the steam can form an internal driving force in the formation to push the crude oil to flow towards the production well. Its essence is to reduce the viscosity of the heavy oil and improve its fluidity. Among them, heat-insulating tubing and a supporting steam pump system are mainly used. The heat-insulating tubing, as the flow channel structure of high-temperature steam, is mainly used for heat insulation to avoid heat exchange and temperature drop during the flow of high-temperature steam. This part will not be elaborated much. The key of the present invention lies in the improvement of the end position of the heat-insulating tubing. Figure 1 For example, its essence is used as a high-temperature steam pumping structure, and in combination with Figure 3 it is described that high-temperature steam can only enter the kinetic energy sleeve 3 from the fixed sleeve 6, and then be pumped out from the inner discharge groove 301, and finally be ejected through the air port on the outer sleeve 1. This part belongs to the basic content of the present invention.

[0033] Embodiment 2: The operation process of the kinetic energy sleeve when pumping high-temperature steam is described as follows:

[0034] The vortex fan group 5 is composed of a vortex fan rod, a curved connecting rod 7 and two support rings. The two support rings are respectively installed in the inner wall positions of the fixed sleeve 6 and the kinetic energy sleeve 3. The vortex fan rod is rotationally connected to the support ring in the fixed sleeve 6 and the vortex fan rod is fixedly connected to the support ring in the kinetic energy sleeve 3. The two ends of the curved connecting rod 7 are respectively installed on the vortex fan rod and the kinetic energy sleeve 3, and the curved connecting rod 7 is in a continuous right-angle bending shape. A sleeve ring is rotationally installed at the horizontal position of the curved connecting rod 7, and a collision ball group 8 is installed under the sleeve ring.

[0035] Scheme description: The technical content in the first embodiment is used for illustration. Most of the conventional high-temperature steam pumping methods are similar. However, the present invention first describes the process of pumping high-temperature steam into the kinetic sleeve 3. The fixed sleeve 6 is fixedly connected to the outer sleeve 1, and the fixed sleeve 6 and the kinetic sleeve 3 already have the ability to rotate. Therefore, an eddy current fan group 5 is arranged between them to Figure 4 serve as an example. The eddy current fan group 5 consists of a fan rod, a curved connecting rod 7, and two support rings. After the high-temperature steam is pumped into the kinetic sleeve 3, the fan rod will rotate under the action of the air flow. Therefore, the installation method of the fan rod and the two support rings is restricted to ensure that the fan rod maintains rotation with the fixed sleeve 6. This can be directly understood as: under the action of the steam air flow, the kinetic sleeve 3 will also rotate synchronously. The key lies in the synchronously rotating curved connecting rod 7. The curved connecting rod 7 is not a straight rod but a continuously bent type, with Figure 3 serve as an example, ensuring that the bending is at 90°. Therefore, sleeve rings are added at the horizontal positions of each bending. The sleeve rings rotate with the curved connecting rod 7, and the sleeve rings are connected to the billiard ball group 8 by straight rods. The billiard ball group 8 is essentially a metal ball sleeve, and several metal balls can be added inside it. The metal balls can move freely inside the metal ball sleeve. Then, when the curved connecting rod 7 rotates, the billiard ball group 8 will also rotate irregularly. Its essence is to ensure that the billiard ball group 8 impacts the inner wall of the kinetic sleeve 3 in an indefinite direction. Through the transmission process of the kinetic sleeve 3 and the inner sleeve 2, a vibration feeling will also be generated on the outer sleeve 1. The main functions of applying vibration when pumping steam in heavy oil thermal recovery are as follows:

[0036] The vibration effect can promote the heat exchange between steam and heavy oil, accelerating the transfer of steam heat to the deep formation. Since the viscosity of heavy oil is highly sensitive to temperature, improving the heat conduction efficiency helps to more quickly reduce the viscosity of crude oil and enhance its fluidity, thereby improving the steam displacement effect;

[0037] Vibration may promote more uniform mixing of steam and heavy oil through physical disturbance, similar to the way a swirl mixing device improves the contact efficiency between a viscosity reducer and crude oil through stirring, thereby strengthening the viscosity reduction effect;

[0038] High-frequency vibration may relieve the pore blockage caused by tiny solid particles or asphaltene deposition, similar to the mechanism of thermal action to remove bottom-hole pollution, thereby expanding the steam sweep range and improving the reservoir utilization degree;

[0039] It should also be noted that when the kinetic sleeve 3 rotates under the action of the air pressure of high-temperature steam, it is mainly used to consume part of the pressure of high-temperature steam. Because in heavy oil thermal recovery, temperature is mainly utilized, and the high-pressure environment of steam will also have a negative impact on the heavy oil layer or the bottom structure. Therefore, the key content of this embodiment is to initially reduce the pressure of high-temperature steam and promote the heat conduction process.

[0040] Embodiment 3: The slip ring sleeve set in Embodiment 1 is described as follows:

[0041] Springs 9 corresponding to the slip ring sleeve set 10 are installed at the inner positions at both ends of the inner sleeve 2. The steam discharge cavities 1003 in two adjacent positions form a steam discharge ring. The cross-section of the steam discharge ring is in a curved arch shape along the direction towards the outer sleeve 1. The lower end of the limiting sleeve 13 matches the steam discharge ring. A notch corresponding to the limiting sleeve 13 is provided on the sliding cylinder 1001. A guide rod is installed on the blocking block 12. The passive pressing piece 11 matches the inner wall of the outer sleeve 1, and the passive pressing piece 11 is connected to the blocking block 12 through the guide rod. Both ends of the guide rod are slidably connected to the outer sleeve 1 and the kinetic energy sleeve 3 respectively. The steam discharge cavity 1003 is arranged at the middle position of the inner discharge groove 301.

[0042] Scheme description: The conventional heavy oil thermal recovery process is described. When high-temperature steam continuously pumped into the outer sleeve 1, due to stable steam injection, it may cause uneven formation pressure distribution, energy attenuation in some areas at the end of the cycle, and it is difficult for stable steam flooding to effectively cover the low-permeability areas between wells, forming a "dead oil zone". The residual crude oil has a high viscosity and poor fluidity, resulting in limited recovery rate. Therefore, based on the kinetic energy sleeve 3, the slip ring sleeve set 10 is optimized in the present invention. Combined with Figure 3 and Figure 5 it is described as follows: After sleeving multiple slip ring sleeve sets 10 on the kinetic energy sleeve 3, mainly by utilizing the double elastic effects of the elastic rings 1002 and the springs 9, ensuring that each slip ring sleeve set 10 is in full contact, so as to form a steam discharge ring by combining two steam discharge cavities 1003. And referring to Figure 7 it is described that since the steam discharge ring always corresponds to the inner discharge groove 301, the high-temperature steam pumped into the kinetic energy sleeve 3 will continuously be pumped into the steam discharge ring. This will generate a lateral thrust on the sliding cylinder 1001. Referring to Figure 6 it is described that since the limiting sleeve 13 installed on the inner sleeve 2 serves as the sliding structure of the blocking block 12 on the one hand and can also serve as the limiting structure of the two sliding cylinders 1001, ensuring that the two sliding cylinders 1001 can only slide in the opposite directions. It can be directly understood that the sliding process of the two sliding cylinders 1001 determines the opening of the steam discharge ring, and the opening diameter is proportional to the steam pumping pressure. After the high-temperature steam is continuously pumped into the heavy oil layer, when the problem of uneven stress such as "high-pressure accumulation" appears in a local position of the outer sleeve, then the high-temperature steam is difficult to be pumped out from the steam discharge ring corresponding to this part and can only be pumped out from the steam discharge rings at other positions first, mainly playing the role of "pressure distribution".

[0043] And combined with Figure 6Explanation: When high-temperature steam is pumped out from the steam discharge ring, it mainly pushes the blocking block 12 outward to ensure the pumping process of high-temperature steam. However, when continuously pumping in high-temperature steam, an obvious hot water layer will be generated, and hot water or viscous oil with reduced viscosity will also penetrate from the outer casing 1 to the middle position between the outer casing 1 and the inner casing 2. However, this liquid phase of hot water or viscous oil mainly generates an inward pressure on the passive pressing piece 11, which will also "hinder" the pumping process of high-temperature steam and even directly block the limiting sleeve 13. The key is to utilize the liquid phase to cooperate with the pressure of the high-temperature steam pumping to reduce the probability or the degree of influence of stress unevenness when pumping out high-temperature steam.

[0044] In summary: Optimize the pumping process of high-temperature steam in the heavy oil thermal recovery process. Based on the heat-insulating oil pipe, improve its end position to obtain a pressure passive telescopic structure. First, use the air pressure of the pumped-in high-temperature steam as the power to drive the kinetic energy sleeve to rotate at a constant speed and in a fixed direction. On the one hand, it initially reduces the steam pressure. The key is to utilize the vibration generated by the impact ball when the curved connecting rod rotates. The vibration effect can promote the heat exchange between the steam and the heavy oil and accelerate the transfer of the steam heat to the deep part of the formation. Secondly, use the steam pressure as the power to drive the slip ring set to perform adaptive sliding. Its essence is that during the indefinite sliding process of the kinetic energy sleeve, the pumping position of the steam is changed in a manner similar to a telescopic action, which is to avoid the problem of "high-pressure accumulation" on the basis of reducing the negative impact of the steam pressure on the bottom structure.

[0045] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

[0046] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A thermal insulation and telescopic device for heavy oil injection and production, which is applied to the end position of a thermal insulation tubing, is characterized in that It includes an outer sleeve (1), a kinetic energy sleeve (3), an inner sleeve (2) and a fixed sleeve (6). The inner sleeve (2) is arranged between the inner wall of the outer sleeve (1) and the outer wall of the kinetic energy sleeve (3). On the outer wall of the kinetic energy sleeve (3), there is a sliding ring sleeve group (10) arranged linearly and equidistantly along the length direction of the outer sleeve (1), and an internal leakage groove (301) corresponding to the sliding ring sleeve group (10) is opened on the kinetic energy sleeve (3). The sliding ring sleeve group (10) is composed of an elastic ring (1002) and two sliding cylinders (1001). The elastic ring (1002) is installed in the middle position between the two sliding cylinders (1001). The sliding cylinders (1001) are sleeved on the outer wall position of the kinetic energy sleeve (3), and a steam leakage cavity (1003) is opened on the inner wall position of the sliding cylinder (1001) far from the elastic ring (1002). A blocking block (12) corresponding to the internal leakage groove (301) and the steam leakage cavity (1003) is arranged between the outer wall of the kinetic energy sleeve (3) and the inner wall of the outer sleeve (1). A passive pressing piece (11) is arranged in the direction corresponding to the inner wall of the outer sleeve (1) on the blocking block (12), and a limiting sleeve (13) corresponding to the blocking block (12) is installed on the inner sleeve (2).

2. The heat insulation and telescopic device for heavy oil injection and production according to claim 1, characterized in that, A fixed seat (4) is installed at the inner wall position of one end of the outer sleeve (1). The fixed seat (4) is fixedly connected to the fixed sleeve (6), and the fixed seat (4) is fixedly connected to the inner sleeve (2). A vortex fan group (5) is arranged between the fixed sleeve (6) and the kinetic energy sleeve (3). The kinetic energy sleeve (3) is rotationally connected to the fixed sleeve (6) through the vortex fan group (5), and the kinetic energy sleeve (3) is rotationally connected to the inner sleeve (2) through the vortex fan group (5).

3. The heavy oil injection-production heat insulation and telescopic device according to claim 2, characterized in that, The vortex fan group (5) is composed of a vortex fan rod, a curved connecting rod (7) and two support rings. The two support rings are respectively installed in the inner wall positions of the fixed sleeve (6) and the kinetic energy sleeve (3). The vortex fan rod is rotationally connected to the support ring in the fixed sleeve (6), and the vortex fan rod is fixedly connected to the support ring in the kinetic energy sleeve (3).

4. The heat insulation and telescopic device for heavy oil injection and production according to claim 3, characterized in that Both ends of the curved connecting rod (7) are respectively installed on the vortex fan rod and the kinetic energy sleeve (3), and the curved connecting rod (7) is in a continuous right-angle bending shape. A sleeve ring is rotationally installed at the horizontal position of the curved connecting rod (7), and a collision ball group (8) is installed under the sleeve ring.

5. A heavy oil injection and production heat insulation telescopic device according to claim 1, characterized in that, Springs (9) corresponding to the sliding ring sleeve group (10) are installed at the internal positions of both ends of the inner sleeve (2).

6. The heat insulation and telescopic device for heavy oil injection and production according to claim 1, characterized in that, The steam leakage cavities (1003) in two adjacent positions form a steam leakage ring, and the cross-section of the steam leakage ring is in a curved arch shape along the direction deviating from the outer sleeve (1).

7. The heavy oil injection-production heat insulation and telescopic device according to claim 6, characterized in that, The lower end of the limiting sleeve (13) matches the steam leakage ring. A notch corresponding to the limiting sleeve (13) is opened on the sliding cylinder (1001). A guide rod is installed on the blocking block (12). The passive pressing piece (11) matches the inner wall of the outer sleeve (1), and the passive pressing piece (11) is connected to the blocking block (12) through the guide rod. Both ends of the guide rod are slidably connected to the outer sleeve (1) and the kinetic energy sleeve (3).

8. The heat insulation and telescopic device for heavy oil injection and production according to claim 1, characterized in that, The steam leakage cavity (1003) is arranged in the middle position of the internal leakage groove (301).

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