Thermal recovery layered injection-production pipe column suitable for highly-inclined directional well

Abstract

The utility model relates to a thermal recovery layered injection-production pipe column suitable for a highly-inclined directional well, which comprises a casing pipe, a heat insulation oil pipe, a jet pump, a high-temperature deep well safety valve, a high-temperature deep well thermal recovery packer, a heat insulation type compensator, an oil pipe and a plurality of target horizon combinations connected through the oil pipe, wherein the heat insulation oil pipe, the jet pump, the high-temperature deep well safety valve, the high-temperature deep well thermal recovery packer, the heat insulation type compensator and the oil pipe are arranged in the casing pipe and sequentially connected. Separation sealing combinations are arranged among the target layer combinations, and a thermal recovery exhaust valve is arranged on the high-temperature deep well thermal recovery packer and connected with an external control system through a hydraulic control pipeline. The thermal recovery layered injection and production pipe column suitable for the highly-deviated directional well can be safely lifted under the highly-deviated well condition, two different working conditions of steam injection and adoption are met, and a solution of layered steam injection, shaft heat insulation, shaft safety and injection and production integration is provided.

Description

Technical Field

[0001] The utility model belongs to the technical field of heavy oil steam injection thermal recovery development, and in particular relates to a layered injection and production pipe string suitable for thermal recovery of high-angle directional wells. Background Art

[0002] In order to reduce the cost of offshore heavy oil thermal recovery, the current trend of offshore heavy oil thermal recovery technology is to develop multiple reservoir layers based on a single high-angle directional well. At the same time, the layered steam injection technology is used to avoid uneven development among multiple layers.

[0003] On the other hand, from the perspective of offshore thermal recovery supporting technology, in order to improve the thermal recovery effect, offshore heavy oil thermal recovery generally adopts the wellbore insulation method of annular nitrogen injection; at the same time, in order to comply with relevant national safety regulations for offshore oil wells, the thermal recovery wellbore tubing must have emergency wellbore isolation means; in order to improve the economic efficiency of thermal recovery, the injection and production integration process is usually adopted. Therefore, how to ensure the safety of the high-angle directional well tubing while ensuring the safety of the wellbore safety, wellbore insulation, and injection and production integration of the offshore thermal recovery supporting is an urgent problem to be solved.

[0004] The layered injection and production strings in the prior art either do not take into account the safety of offshore thermal recovery wellbore, wellbore insulation or the process requirements of injection and production integration, or cannot meet the safety requirements for the lifting and lowering of offshore high-angle directional well strings. Utility Model Content

[0005] In order to solve all or part of the above problems, the purpose of the utility model is to provide a layered injection and production string suitable for thermal production in highly inclined directional wells, which can be safely raised and lowered in highly inclined well conditions, meet the needs of steam injection and production, and provide a solution for layered steam injection, wellbore insulation, wellbore safety and integrated injection and production.

[0006] The utility model provides a stratified injection and production string suitable for thermal recovery in highly inclined directional wells, comprising a casing and an insulated oil pipe, a jet pump, a high-temperature deep well safety valve, a high-temperature deep well thermal recovery packer, an insulated compensator, an oil pipe and a plurality of target layer combinations connected by the oil pipe, a partition sealing combination is arranged between the plurality of target layer combinations, a thermal recovery exhaust valve is arranged on the high-temperature deep well thermal recovery packer, and the thermal recovery exhaust valve is connected to an external control system through a hydraulically controlled pipeline.

[0007] In some embodiments, a working barrel is further included. The working barrel is disposed in the casing and is located at the position of the target layer combination. The working barrel is connected to the casing through a sand control packer.

[0008] In some embodiments, a combination of several target layers includes a first group of target layers, and the first group of target layers includes a first injection and production check valve, a first critical injection valve, a first screen section, a first sand control section and a first target layer, wherein the first injection and production check valve and the first critical injection valve are sequentially arranged on the oil pipe from top to bottom, the first screen section is arranged between the oil pipe and the working barrel, the first sand control section is arranged between the working barrel and the casing, and the first target layer is located on the outside of the casing.

[0009] In some embodiments, a combination of several target layers includes a second group of target layers, and the second group of target layers includes a second injection and production check valve, a second critical injection valve, a second screen section, a second sand control section and a second target layer, wherein the second injection and production check valve and the second critical injection valve are sequentially arranged on the oil pipe from top to bottom, the second screen section is arranged between the oil pipe and the working barrel, the second sand control section is arranged between the working barrel and the casing, and the second target layer is located on the outside of the casing.

[0010] In some embodiments, the partition seal assembly includes an insert seal, which is sleeved on the oil pipe and located between the first screen section and the second screen section.

[0011] In some embodiments, the partition seal assembly further includes a first stratified packer, which is disposed between the mandrel and the casing and between the first sand control segment and the second sand control segment.

[0012] In some embodiments, the first injection-production check valve and the second injection-production check valve are configured as check valves for connecting the oil pipe and the annulus between the oil pipe and the casing. Under the action of the pressure difference, the fluid in the annulus can pass through the first injection-production check valve and the second injection-production check valve and enter the oil pipe.

[0013] In some embodiments, the first critical injection valve and the second critical injection valve are configured as channels for connecting the oil pipe and the annulus between the oil pipe and the casing, and the fluid can enter the annulus from the inside of the oil pipe through the first critical injection valve and the second critical injection valve.

[0014] In some embodiments, the thermal recovery exhaust valve and the high-temperature deep well safety valve control the opening and closing of the annulus between the tubing and the casing and the inner channel of the tubing through the hydraulic control pipeline.

[0015] In some embodiments, the high-temperature deep well safety valve is configured to cut off the internal passage of the insulated oil pipe in an emergency, and the high-temperature deep well thermal recovery packer is configured to cut off the passage of the oil pipe and the annulus between the oil pipe and the casing in an emergency.

[0016] It can be seen from the above technical scheme that the utility model is applicable to thermal recovery layered injection and production pipe string of high-angle directional wells and has the following advantages:

[0017] 1) The insertion seal and sand control pipe mandrel are used to isolate different layers. The resistance is small in high-angle well conditions, making it easy to trip;

[0018] 2) Through the stratified packer of the sand control string and the inserted seal of the production string, the effective isolation effect inside and outside the pipe is achieved, realizing the true stratified steam injection;

[0019] 3) The production string rationally combines tools such as jets, high-temperature deep well thermal recovery packers, high-temperature deep well safety valves, injection-production check valves and critical injection valves, realizing the organic combination of stratified steam injection and wellbore insulation, wellbore safety and injection-production integrated technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a layered injection and production string suitable for thermal production in highly deviated directional wells according to an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of heat injection for a layered injection and production string for thermal production in a highly deviated directional well according to an embodiment of the utility model;

[0022] Figure 3 This is a production schematic diagram of a stratified injection and production string suitable for thermal production in highly deviated directional wells according to an embodiment of the utility model.

[0023] In the figure, 1-insulated oil pipe; 2-hydraulic control pipeline; 3-jet pump; 4-high-temperature deep well safety valve; 5-thermal recovery exhaust valve; 6-high-temperature deep well thermal recovery packer; 7-insulated compensator; 8-oil pipe; 9-sand control packer; 10-first injection and production check valve; 11-first critical injection valve; 12-insert seal; 13-working cylinder; 14-second injection and production check valve; 15-second critical injection valve; 16-second screen section; 17-second target layer; 18-second sand control section; 19-first stratified packer; 20-first sand control section; 21-first target layer; 22-first screen section; 23-casing. DETAILED DESCRIPTION

[0024] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings, which is suitable for thermal recovery layered injection and production tubing in highly deviated directional wells.

[0025] Figure 1 The structure of a layered injection and production string for thermal production in a highly deviated directional well according to an embodiment of the utility model is shown; Figure 2 A heat injection diagram for a thermal production layer injection string for a highly deviated directional well according to an embodiment of the utility model is shown; Figure 3 The following is a production diagram of a thermal recovery layered injection and production string for a highly deviated directional well according to an embodiment of the utility model. Figures 1 to 3As shown, the system is suitable for thermal recovery stratified injection and production tubing for high-angle directional wells, including a casing 23 and an insulated oil pipe 1, a jet pump 3, a high-temperature deep well safety valve 4, a high-temperature deep well thermal recovery packer 6, an insulated compensator 7, an oil pipe 8, and several target layer combinations connected by the oil pipe 8, wherein a separation sealing combination is arranged between the several target layer combinations, a thermal recovery exhaust valve 5 is arranged on the high-temperature deep well thermal recovery packer 6, and the thermal recovery exhaust valve 5 is connected to an external control system through a hydraulic control pipeline 2.

[0026] According to the embodiment of the utility model, when the stratified injection and production string for thermal recovery of high-angle directional wells is used, a single round of heavy oil thermal recovery steam throughput is generally divided into three stages: steam injection, well shut-down and production, wherein fluid flows in the wellbore during both the steam injection and production stages.

[0027] Please refer to Figure 2 In the steam injection stage, the implementation method of the thermal recovery layered injection and production string of the high-angle directional well is as follows: after the high-temperature steam is injected into the wellbore, it passes through the insulated oil pipe 1, the jet pump 3, the high-temperature deep well safety valve 4, the high-temperature deep well thermal recovery packer 6, the insulated compensator 7 and the oil pipe 8 in sequence, and finally reaches the target layer combination. After the high-temperature steam reaches the target layer combination, steam is injected into the target layer as needed through the target layer combination.

[0028] Please refer to Figure 3 In the production stage, the implementation method of the thermal recovery stratified injection and production string for high-angle directional wells is specifically as follows: under the action of the pressure difference between the outside and the inside of the oil pipe 8, the oil and gas in the target layer enters the oil pipe 8 through the target layer combination, and under the action of pressure, passes upward through the insulation compensator 7, the insulation oil pipe 1, the high-temperature deep well thermal recovery packer 6 and the high-temperature deep well safety valve 4 into the jet pump 3, and is lifted to the ground under the action of the jet pump 3 to complete the oil and gas production.

[0029] In the present application, the jet pump 3 is constructed without moving parts, and can realize the switching of steam injection-production-steam injection without moving the pipe string, so as to achieve the purpose of integrated injection and production. In the present application, the high-temperature deep well safety valve 4 can cut off the oil pipe 8 channel in an emergency, and the high-temperature deep well thermal recovery packer 6 can cut off the annular channel in an emergency. The cooperation of the two can realize the safety control of thermal recovery wellbore. In the present application, the thermal recovery exhaust valve 5 and the target layer combination provide an annular nitrogen injection channel, realize the full wellbore insulation process, and improve the steam injection effect.

[0030] Through the above arrangement, the stratified injection and production string suitable for thermal production in high-angle directional wells according to the embodiment of the utility model realizes a reasonable combination of stratified steam injection and wellbore insulation, wellbore safety and injection and production integration technology, and is more convenient and reliable to use.

[0031] Please go back Figure 1In some embodiments, a working barrel 13 may also be included. The working barrel 13 is disposed in the casing 23 and is located at the position of the target layer combination. The working barrel 13 is connected to the casing 23 through a sand control packer 9.

[0032] Please continue to refer to Figure 1 In some embodiments, a combination of several target layers may include a first group of target layers, and the first group of target layers may include a first injection and production check valve 10, a first critical injection valve 11, a first screen section 22, a first sand control section 20 and a first target layer 21, wherein the first injection and production check valve 10 and the first critical injection valve 11 are sequentially arranged on the oil pipe 8 from top to bottom, the first screen section 22 is arranged between the oil pipe 8 and the working barrel 13, the first sand control section 20 is arranged between the working barrel 13 and the casing 23, and the first target layer 21 is located on the outside of the casing 23.

[0033] Please continue to refer to Figure 1 In some embodiments, a plurality of target layer combinations may include a second group of target layers, the second group of target layers includes a second injection and production check valve 14, a second critical injection valve 15, a second screen section 16, a second sand control section 18 and a second target layer 17, wherein the second injection and production check valve 14 and the second critical injection valve 15 are sequentially arranged on the oil pipe 8 from top to bottom, the second screen section 16 is arranged between the oil pipe 8 and the working barrel 13, the second sand control section 18 is arranged between the working barrel 13 and the casing 23, and the second target layer 17 is located on the outside of the casing 23.

[0034] Please continue to refer to Figure 1 In some embodiments, the partition seal assembly may include an insert seal 12 , which is sleeved on the oil pipe 8 and located between the first screen section 22 and the second screen section 16 .

[0035] In the above setting of the present application, the target strata can be set to multiple. Among them, the number of inserted seals 12, working barrels 13, stratified packers, first screen sections 22 and second screen sections 16, first sand control sections 20 and second sand control sections 18, first injection and production check valves 10 and second injection and production check valves 14, first critical injection valves 11 and second critical injection valves 15 in the thermal production stratified injection and production string of the high-angle directional well can be adjusted according to the number of target strata in the reservoir. The number of inserted seals 12, working barrels 13, and stratified packers is the number of target strata minus one, and the number of first screen sections 22 and second screen sections 16, first sand control sections 20 and second sand control sections 18 is equal to the number of target strata.

[0036] Please continue to refer to Figure 1 In some embodiments, the separation seal assembly may further include a first stratified packer 19 , which is disposed between the mandrel 13 and the casing 23 , and between the first sand control segment 20 and the second sand control segment 18 .

[0037] Please continue to refer to Figures 1 to 3 In some embodiments, the first injection-production check valve 10 and the second injection-production check valve 14 can be configured as check valves for connecting the oil pipe 8 and the annulus between the oil pipe 8 and the casing 23. Under the action of the pressure difference, the fluid in the annulus can pass through the first injection-production check valve 10 and the second injection-production check valve 14 and enter the oil pipe 8.

[0038] Please continue to refer to Figures 1 to 3 In some embodiments, the first critical injection valve 11 and the second critical injection valve 15 can be configured as a channel for connecting the oil pipe 8 and the annulus between the oil pipe 8 and the casing 23, and the fluid can enter the annulus from the inside of the oil pipe 8 through the first critical injection valve 11 and the second critical injection valve 15.

[0039] In some embodiments, the thermal recovery exhaust valve 5 and the high-temperature deep well safety valve 4 can control the opening and closing of the annulus between the oil pipe 8 and the casing 23 and the inner channel of the oil pipe 8 through the hydraulic control pipeline 2.

[0040] Please continue to refer to Figures 1 to 3 In some embodiments, the high-temperature deep well safety valve 4 is configured to cut off the internal passage of the insulated oil pipe 1 in an emergency, and the high-temperature deep well thermal recovery packer 6 is configured to cut off the passage of the oil pipe 8 and the annulus between the oil pipe 8 and the casing 23 in an emergency.

[0041] Combination Figures 1 to 3 As shown, based on the above settings, the embodiment of the utility model is applicable to the thermal recovery layered injection and production string of the high-angle directional well. The upper part is sequentially arranged with a jet pump 3, a high-temperature deep well safety valve 4, a high-temperature deep well thermal recovery packer 6 and a thermal insulation compensator 7 connected by an insulated oil pipe 1, and the lower part is arranged from top to bottom with a first injection and production check valve 10, a first critical injection valve 11, an insert seal 12, a second injection and production check valve 14 and a second critical injection valve 15 connected by an oil pipe 8. A thermal recovery exhaust valve 5 is arranged on the high-temperature deep well thermal recovery packer 6, and the high-temperature deep well safety valve 4 and the thermal recovery exhaust valve 5 are controlled to open and close through the hydraulic control pipeline 2.

[0042] Furthermore, the sand control string is composed of a sand control packer 9, a first screen section 22, a first stratified packer 19, a mandrel 13, and a second screen section 16 from top to bottom. The production string is positioned and sealed with the mandrel 13 of the sand control string by inserting a seal 12. The first injection and production check valve 10 and the first critical injection valve 11 are distributed in the first screen section 22. The first screen section 22 is distributed in the first sand control section 20. The first sand control section 20 corresponds to the first target layer 21. The second injection and production check valve 14 and the second critical injection valve 15 are distributed in the second screen section 16. The second screen section 16 is distributed in the second sand control section 18. The second sand control section 18 corresponds to the second target layer 17.

[0043] Furthermore, the high-temperature deep well thermal recovery packer 6 cooperates with the casing 23 to seal, isolates the annulus of the oil pipe 8 and the casing 23, and the thermal recovery exhaust valve 5 and the high-deep well safety valve control the opening and closing of the annulus and the oil pipe 8 through a hydraulic control pipeline 2. The first injection and production check valve 10 and the second injection and production check valve 14 are check valves that communicate the oil pipe 8 with the annulus, and the annular fluid can enter the oil pipe 8 through them under the action of the pressure difference. The first critical injection valve 11 and the second critical injection valve 15 have a channel that communicates the oil pipe 8 with the annulus, and the fluid can enter the annulus from the inside of the oil pipe 8 through them.

[0044] Furthermore, the thermal recovery exhaust valve 5, the first injection and production check valve 10 and the second injection and production check valve 14 provide an annular nitrogen injection channel, and cooperate with the insulated oil pipe 1 on the upper part of the sand control packer 9 to realize the full wellbore insulation process and improve the steam injection effect.

[0045] Therefore, the stratified injection and production string for thermal recovery in highly deviated directional wells according to the embodiment of the utility model is combined with the above-mentioned configuration and is specifically used as follows:

[0046] Please refer to Figure 2 and Figure 3 A single round of heavy oil thermal recovery steam injection and puffing is generally divided into three stages: steam injection, well shut-in and production. There is fluid flow in the wellbore during both the steam injection and production stages. In the steam injection stage, after high-temperature steam is injected into the wellbore, it passes through the insulated oil pipe 1, the jet pump 3, the high-temperature deep well safety valve 4, the high-temperature deep well thermal recovery packer 6, the insulated compensator 7, the oil pipe 8, the first injection and production check valve 10 and the second injection and production check valve 14 in sequence, and finally, passes through the first critical injection valve 11 and the second critical injection valve 15 to enter the first screen pipe section 22 and the second screen pipe section 16, and then passes through the first sand control section 20 and the second sand control section 18, and finally enters the first target layer 21 and the second target layer 17. Due to the sealing effect of the insert seal 12 and the mandrel 13 and the first stratified packer 19 and the casing 23, the first screen section 22 and the second screen section 16 are both in an isolated state inside and outside the pipe. Therefore, there is no disturbance between the hot fluids flowing out of the first critical injection valve 11 and the second critical injection valve 15, and they enter the first target layer 21 and the second target layer 17 respectively. In addition, the first critical injection valve and the second critical injection valve 15 can set the injection amount separately according to the steam absorption amount of the first target layer 21 and the second target layer 17, so as to meet the steam injection on demand of different layer reservoirs.

[0047] During the production phase, the first injection-production check valve 10 and the second injection-production check valve 14 are opened under the action of the pressure difference between the outside and the inside of the oil pipe 8, and the oil and gas flow in the target layer enters the oil pipe 8 through the first injection-production check valve 10 and the second injection-production check valve 14, the first critical injection valve 11 and the second critical injection valve 15, and enters the jet pump 3 upward under the action of pressure through the insulation compensator 7, the insulation oil pipe 1, the high-temperature deep well thermal recovery packer 6 and the high-temperature deep well safety valve 4, and is lifted to the ground under the action of the jet pump 3 to complete the oil and gas production.

[0048] As described above, according to the embodiment of the utility model, the thermal production layered injection and production string for a high-angle directional well includes a production string and a sand control string arranged in a casing 23, wherein: the production string includes an insulated oil pipe 1, a hydraulic control pipeline 2, a jet pump 3, a high-temperature deep well safety valve 4, a thermal production exhaust valve 5, a high-temperature deep well thermal production packer 6, an insulated compensator 7, an oil pipe 8, a first injection and production check valve 10, a first critical injection valve 11, an inserted seal 12, a second injection and production check valve 14, and a second critical injection valve 15; the sand control string includes a sand control packer 9, a working barrel 13, a second screen pipe section 16, a first layered packer 19, and a first screen pipe section 22.

[0049] Compared with the prior art, the embodiment of the utility model is suitable for the thermal recovery stratified injection and production string of high-angle directional wells and has the following advantages: the inserted seal 12 and the sand control string working tube 13 are used to isolate different layers, and the resistance is small under high-angle well conditions, which is convenient for lifting and lowering; the stratified sealer of the sand control string and the inserted seal 12 of the production string can achieve the effect of effective isolation inside and outside the pipe, and realize the real stratified steam injection; the production string reasonably combines tools such as jet, high-temperature deep well thermal recovery sealer 6, high-temperature deep well safety valve 4, injection and production check valve and critical injection valve, so as to realize the organic combination of stratified steam injection with wellbore insulation, wellbore safety and injection and production integrated process.

[0050] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0051] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and description of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A thermal recovery layered injection and production string suitable for high-angle directional wells, characterized in that: It includes a casing and an insulated oil pipe, a jet pump, a high-temperature deep well safety valve, a high-temperature deep well thermal recovery packer, an insulated compensator, an oil pipe and several target layer combinations connected by the oil pipe. A separation sealing combination is arranged between the several target layer combinations. The high-temperature deep well thermal recovery packer is provided with a thermal recovery exhaust valve, and the thermal recovery exhaust valve is connected to an external control system through a hydraulic control pipeline.

2. The injection and production string for thermal recovery of highly deviated directional wells according to claim 1, characterized in that: It also includes a working barrel, which is arranged in the casing and located at the position of the target layer combination. The working barrel is connected to the casing through a sand control packer.

3. The injection and production string for thermal recovery of highly deviated directional wells according to claim 2, characterized in that: The plurality of target strata combinations include a first group of target strata, the first group of target strata include a first injection-production check valve, a first critical injection valve, a first screen section, a first sand control section and a first target stratum, wherein the first injection-production check valve and the first critical injection valve are sequentially arranged on the oil pipe from top to bottom, the first screen section is arranged between the oil pipe and the working barrel, the first sand control section is arranged between the working barrel and the casing, and the first target stratum is located outside the casing.

4. The injection and production string for thermal recovery of highly deviated directional wells according to claim 3, characterized in that: A plurality of target strata combinations include a second group of target strata, and the second group of target strata includes a second injection-production check valve, a second critical injection valve, a second screen section, a second sand control section and a second target stratum, wherein the second injection-production check valve and the second critical injection valve are sequentially arranged on the oil pipe from top to bottom, the second screen section is arranged between the oil pipe and the working barrel, the second sand control section is arranged between the working barrel and the casing, and the second target stratum is located outside the casing.

5. The injection and production string for thermal recovery of highly deviated directional wells according to claim 4, characterized in that: The partition seal assembly comprises an insert seal, and the insert seal sleeve is arranged on the oil pipe and is located between the first screen pipe section and the second screen pipe section.

6. The injection and production string for thermal recovery of highly deviated directional wells according to claim 5, characterized in that: The partition seal assembly further includes a first stratified packer, which is disposed between the mandrel and the casing and between the first sand control segment and the second sand control segment.

7. The injection and production string for thermal recovery of highly deviated directional wells according to claim 6, characterized in that: The first injection-production check valve and the second injection-production check valve are configured as check valves for connecting the oil pipe and the annulus between the oil pipe and the casing. Under the action of pressure difference, the fluid in the annulus can pass through the first injection-production check valve and the second injection-production check valve and enter the oil pipe.

8. The injection and production string for thermal recovery of highly deviated directional wells according to claim 6, characterized in that: The first critical injection valve and the second critical injection valve are configured as channels for connecting the oil pipe and the annulus between the oil pipe and the casing, and fluid can enter the annulus from the inside of the oil pipe through the first critical injection valve and the second critical injection valve.

9. The injection and production string for thermal recovery of highly deviated directional wells according to any one of claims 1 to 8, characterized in that: The thermal recovery exhaust valve and the high-temperature deep well safety valve control the opening and closing of the annulus between the oil pipe and the casing and the inner channel of the oil pipe through the hydraulic control pipeline.

10. The injection and production string for thermal recovery of highly deviated directional wells according to any one of claims 1 to 8, characterized in that: The high-temperature deep well safety valve is configured to cut off the internal passage of the insulated oil pipe in an emergency, and the high-temperature deep well thermal recovery packer is configured to cut off the passage of the oil pipe and the annulus between the oil pipe and the casing in an emergency.

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