Setting control mechanism for presetting soluble medium of self-setting packer

Abstract

The invention discloses a setting control mechanism for presetting a soluble medium for a self-setting packer, which belongs to the technical field of packers, and comprises a control body, a first soluble material block, a soluble medium, an injection hole and a sealing mechanism, a first dissoluble material block is arranged in the control body, and an injection hole is formed in the side wall of the control body; a sealing mechanism is arranged in the injection hole; a cavity is formed in the first soluble material block, and a soluble medium is contained in the cavity. According to the setting control mechanism for presetting the soluble medium for the self-setting packer, the dissolving time of a soluble material is accurately controlled, it is guaranteed that the packer can be automatically set after descending into a well, and the situation that the packer is set in advance due to the fact that the concentration of the soluble medium in a shaft is too high is avoided; or the packer cannot be set due to the fact that the concentration of a soluble medium in a shaft is too low. The setting time of the self-setting packer is effectively controlled, and the construction operation of the self-setting packer is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of packers, and in particular relates to a setting control mechanism for a self-setting packer with a pre-set soluble medium. Background Art

[0002] In the oil industry, dissolvable materials are primarily used in the processing and fabrication of dissolvable packers or dissolvable bridge plugs. Dissolvable bridge plugs are widely used in staged fracturing of horizontal wells. By installing multiple bridge plugs in the wellbore, different well sections can be separated and independently fractured, increasing oil and gas well production. After fracturing, the bridge plugs dissolve under the wellbore temperature and fluid environment, eliminating the need for additional drilling and grinding operations, thereby reducing operational risks and costs. During completion and workover operations in oil and gas wells, dissolvable bridge plugs or packers can be used to temporarily seal the wellbore, isolating different formations or areas to prevent fluid crossflow or for other operations.

[0003] This soluble material is a soluble magnesium-based alloy (e.g., magnesium-aluminum alloy, magnesium-cadmium alloy, etc.). Magnesium-aluminum alloys have poor corrosion resistance and easily dissolve in solutions such as NaCl and KCl to form MgCl2 and Mg(OH)2. Based on this characteristic, magnesium alloys have been gradually applied to various soluble packers and bridge plugs in the oil field. That is, after the packers and bridge plugs have completed fracturing and plugging operations, in order to reduce construction steps, NaCl or KCl is injected into the wellbore, or the existing wellbore fluid containing NaCl or KCl is used to cause them to naturally dissolve. This can eliminate the need for bridge plug drilling and milling, packer unsealing, and tubing tripping, shortening the construction period and reducing construction costs.

[0004] However, due to the unstable concentration of NaCl or KCl in the wellbore, the dissolution rate of the packer and bridge plug is also unstable. This means that it is difficult to control the setting time of the self-setting packer using soluble materials (magnesium-based alloys). If the NaCl or KCl concentration is too low, the soluble material dissolves slowly and takes a long time to dissolve, making it impossible to set the packer after entering the well, thus affecting oil well production. If the NaCl or KCl concentration is too high, the soluble material dissolves quickly and takes a short time to dissolve, causing the packer to set before reaching the intended position, rendering the operation ineffective. Summary of the Invention

[0005] In order to solve the above problems, the present invention discloses a setting control mechanism for a self-setting packer with a pre-set soluble medium, comprising: a control body, a first soluble material block, a soluble medium, an injection hole and a sealing mechanism; The control body is provided with a first soluble material block, and an injection hole is opened on the side wall; A sealing mechanism is provided in the injection hole; A cavity is provided in the first dissolvable material block, and a soluble medium is contained in the cavity.

[0006] Furthermore, the sealing mechanism includes a sealing plug and a second sealing ring; A plurality of second sealing rings are arranged on the outer wall of the sealing plug.

[0007] Furthermore, it also includes a first sealing ring and a circulation groove; First sealing rings are provided on both ends of the outer wall of the first soluble material block; A plurality of flow slots are provided on the circumference of the outer wall of the first dissolvable material block, and the flow slots are respectively connected to the cavity and the injection hole; The setting control mechanism is an independent component or is integrated with the self-setting packer.

[0008] The present invention also discloses a setting control mechanism for a self-setting packer with pre-set soluble medium, comprising: a control body, a first soluble material block, a soluble medium, an injection hole, a second soluble material block and a sealing mechanism; The control body is provided with a first soluble material block and a second soluble material block at intervals, and an injection hole is opened on the side wall; A sealing mechanism is provided in the injection hole; A cavity is provided between the first dissolvable material block and the second dissolvable material block, and the cavity contains a soluble medium.

[0009] Furthermore, the sealing mechanism includes a sealing plug and a second sealing ring; A plurality of second sealing rings are arranged on the outer wall of the sealing plug.

[0010] Furthermore, it also includes a first sealing ring, a positioning ring and a circulation groove; A first sealing ring is provided on the outer wall of each of the first dissolvable material block and the second dissolvable material block; The positioning ring is arranged between the first soluble material block and the second soluble material block, and a plurality of flow grooves are arranged on the circumference of the outer wall of the positioning ring, and the flow grooves are connected to the injection hole; The setting control mechanism is an independent component or is integrated with the self-setting packer.

[0011] The present invention also discloses a setting control mechanism for a self-setting packer with pre-set soluble medium, comprising: a control body, a first soluble material block, a soluble medium, an injection hole, a second soluble material block and a sealing mechanism; The control body is provided with a first soluble material block and a second soluble material block at intervals, and an injection hole is opened on the side wall; A sealing mechanism is provided in the injection hole; A cavity is provided between the first dissolvable material block and the second dissolvable material block, and the cavity contains a soluble medium.

[0012] Further, the sealing mechanism comprises a sealing plug and a second sealing ring; The sealing plug is provided with a plurality of second sealing rings on the outer wall thereof; The sealing plug is provided with a tapered tip.

[0013] Further, the sealing mechanism comprises a first sealing ring; The first and second blocks of dissolvable material are each provided with a first sealing ring on the outer wall thereof; The setting control mechanism is an independent component or is integrally formed with the self-setting packer.

[0014] Further, the sealing mechanism comprises a solvent capsule; The solvent capsule is arranged in the cavity; The dissolvable medium is arranged in the solvent capsule.

[0015] Compared with the prior art, the embodiments of the present application have at least the following advantages: the present application provides a setting control mechanism for a self-setting packer pre-stored with a dissolvable medium, which can accurately control the dissolving time of the dissolvable material, ensure that the packer can be automatically set after being lowered into the well, avoid the problem that the packer is prematurely set due to too high concentration of the dissolvable medium in the wellbore, or the packer cannot be set due to too low concentration of the dissolvable medium in the wellbore, ensure effective control of the setting time of the self-setting packer, and ensure the construction operation of the self-setting packer.

[0016] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and claims hereof. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0018] Figure 1 Fig. 1 shows a structural schematic diagram of a setting control mechanism for a self-setting packer pre-stored with a dissolvable medium according to an embodiment of the present application; Figure 2 Fig. 2 shows a structural schematic diagram of an injection hole according to the embodiment of the present application; Figure 3 Fig. 3 shows a structural schematic diagram of a setting control mechanism for a self-setting packer pre-stored with a dissolvable medium according to an embodiment of the present application; Figure 4 shows a schematic structural diagram of an injection hole according to a second embodiment of the present invention; Figure 5 It shows a structural schematic diagram of a setting control mechanism for a self-setting packer pre-filled with a soluble medium according to a third embodiment of the present invention; Figure 6 A schematic structural diagram of an injection hole according to a third embodiment of the present invention is shown.

[0019] Figure numerals: 1, control body; 2, first sealing ring; 3, first soluble material block; 4, soluble medium; 5, positioning ring; 6, circulation groove; 7, injection hole; 8, plug; 9, second sealing ring; 10, solvent capsule; 11, second soluble material block. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] Figure 1 FIG. 1 shows a schematic structural diagram of a setting control mechanism for a self-setting packer pre-filled with a soluble medium according to a first embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a setting control mechanism for a self-setting packer with a pre-set soluble medium, comprising: a control body 1, a first soluble material block 3, a soluble medium 4, an injection hole 7, and a sealing mechanism; The control body 1 is provided with a first soluble material block 3, and an injection hole 7 is opened on the side wall. Figure 2 ); A sealing mechanism is provided in the injection hole 7; The first soluble material block 3 is provided with a cavity, and the cavity contains the soluble medium 4. That is, the soluble medium 4 is sealed in the first soluble material block 3 and the control body 1.

[0022] Among them, the A end of the control body 1 is connected to the closed cavity of the setting piston of the self-setting packer, and the B end of the control body 1 is connected to the wellbore fluid space.

[0023] The setting control mechanism of the present invention realizes accurate control of the setting time of the self-setting packer and can also be used to control the dissolution rate of other similar soluble materials.

[0024] In some embodiments, the sealing mechanism includes a sealing plug 8 and a second sealing ring 9; A plurality of second sealing rings 9 are provided on the outer wall of the sealing plug 8 .

[0025] The plug 8 cooperates with the injection hole 7 and seals the injection hole 7 .

[0026] In some embodiments, the setting control mechanism for the self-setting packer pre-set with a soluble medium further includes a first sealing ring 2 and a flow groove 6; First sealing rings 2 are provided on both ends of the outer wall of the first soluble material block 3; A plurality of flow slots 6 are provided on the circumference of the outer wall of the first soluble material block 3 , and the flow slots 6 are connected to the cavity and the injection hole 7 respectively.

[0027] In some embodiments, the control body 1 is tubular as a whole, the first dissolvable material block 3 is cylindrical as a whole, and the cavity is cylindrical as a whole.

[0028] Although the control body 1 is tubular as an example, the shape of the control body 1 of the present invention is not limited to this. It can be set according to actual conditions, such as a rectangular parallelepiped or a cube with a channel inside. Those skilled in the art can set it according to the principles of the present invention and actual conditions, as long as the principles of the present invention can be implemented.

[0029] Although the first soluble material block 3 is described above as a cylindrical shape as an example, the present invention is not limited to this. It can be set according to actual conditions, such as a rectangular parallelepiped or a cube, etc. Those skilled in the art can set it according to the principles of the present invention and actual conditions, as long as the principles of the present invention can be implemented.

[0030] The present invention provides a setting control mechanism for a self-setting packer with a pre-set soluble medium, which realizes accurate control of the dissolution time of the soluble material, ensures that the packer can be automatically set after being lowered into the well, and avoids the problems of premature setting of the packer due to excessively high concentration of the soluble medium 4 in the wellbore, or failure to set the packer due to excessively low concentration of the soluble medium 4 in the wellbore; ensures effective control of the setting time of the self-setting packer, and ensures the construction operation of the self-setting packer.

[0031] A method for using a setting control mechanism for a self-setting packer pre-set with a soluble medium comprises installing a soluble mechanism, inserting a soluble medium 4 , and contacting the soluble material with the soluble medium 4 .

[0032] The present invention discloses a method for using a setting control mechanism for a self-setting packer with a pre-set soluble medium, comprising the following steps: Step 1: Select a soluble medium 4 that matches the type of soluble material selected; Step 2: Determine the concentration of the soluble medium 4 based on the time required for the self-setting packer to be lowered into the predetermined position in the well + the safety guarantee time, and determine the setting time of the self-setting packer; Step 3: Follow Figure 1 The assembly shown includes a control body 1, a first sealing ring 2, and a first dissolvable material block 3; Step 4: Place the setting control mechanism of the assembled self-setting packer pre-filled with soluble medium into the self-setting packer; Step 5: injecting the soluble medium 4 into the control body 1 from the injection hole 7; Step 6: Tighten the plug 8 onto the injection hole 7 and seal the control body 1. The soluble medium 4 is now in contact with the first soluble material block 3, and the first soluble material block 3 begins to dissolve. The packer setting time starts counting. Step 7: Lower the self-setting packer into the well and lower it to the predetermined position before the self-setting packer starts to set; Step 8: When the setting time of the self-setting packer is reached, the first soluble material block 3 dissolves, and the sealed cavity of the setting piston of the self-setting packer is connected to the wellbore fluid space. Under the action of the wellbore fluid column pressure, the piston pushes the rubber sleeve to compress, sealing the oil casing annulus, completing the setting of the self-setting packer.

[0033] like Figure 3 As shown, the present invention also discloses a setting control mechanism for a self-setting packer with pre-set soluble medium, comprising: a control body 1, a first soluble material block 3, a soluble medium 4, an injection hole 7, a second soluble material block 11 and a sealing mechanism; The control body 1 is provided with a first soluble material block 3 and a second soluble material block 11 (located at both ends of the control body 1), and an injection hole 7 is opened on the side wall. Figure 4 ); A sealing mechanism is provided in the injection hole 7; A cavity is provided between the first soluble material block 3 and the second soluble material block 11 , and the cavity contains the soluble medium 4 . That is, the soluble medium 4 is sealed in the first soluble material block 3 , the second soluble material block 11 , the positioning ring 5 and the control body 1 .

[0034] In some embodiments, the sealing mechanism includes a sealing plug 8 and a second sealing ring 9; A plurality of second sealing rings 9 are provided on the outer wall of the sealing plug 8 .

[0035] The plug 8 cooperates with the injection hole 7 and seals the injection hole 7 .

[0036] In some embodiments, the setting control mechanism for the self-setting packer pre-set with a soluble medium further includes a first sealing ring 2, a positioning ring 5 and a flow groove 6; A first sealing ring 2 is provided on the outer wall of each of the first soluble material block 3 and the second soluble material block 11; The positioning ring 5 is arranged between the first soluble material block 3 and the second soluble material block 11 . A plurality of flow grooves 6 are arranged on the circumference of the outer wall of the positioning ring 5 . The flow grooves 6 are connected to the injection hole 7 .

[0037] Optionally, a groove is provided at one end of the first dissolvable material block 3 close to the positioning ring 5; A groove is provided on one end of the second soluble material block 11 close to the positioning ring 5 .

[0038] The groove is optional and is determined based on actual needs. If the contact area between the soluble medium 4 and the soluble material can meet the dissolution requirements, the groove does not need to be processed. On the contrary, if the contact area cannot meet the dissolution requirements, the groove is processed.

[0039] The present invention discloses a method for using a setting control mechanism for a self-setting packer with a pre-set soluble medium, comprising the following steps: Step 1: Select a soluble medium 4 that matches the type of soluble material selected; Step 2: Determine the concentration of the soluble medium 4 based on the time required for the self-setting packer to be lowered into the predetermined position in the well + the safety guarantee time, and determine the setting time of the self-setting packer; Step 3: Follow Figure 3 The assembly shown includes a control body 1, a first dissolvable material block 3, a second dissolvable material block 11, and a positioning ring 5; Step 4: Place the assembled self-setting packer pre-set soluble medium setting control mechanism into the self-setting packer; Step 5: injecting the soluble medium 4 into the control body 1 from the injection hole 7; Step 6: Tighten the plug 8 onto the injection hole 7 and seal the control body 1. The soluble medium 4 is now in contact with the first soluble material block 3 and the second soluble material block 11. The soluble material begins to dissolve, and the packer setting time begins. Step 7: Lower the self-setting packer into the well and lower it to the predetermined position before the self-setting packer starts to set; Step 8: When the setting time of the self-setting packer is reached, the first soluble material block 3 and the second soluble material block 11 dissolve, and the closed cavity of the setting piston of the self-setting packer is connected to the wellbore fluid space. Under the action of the wellbore fluid column pressure, the piston pushes the rubber sleeve to compress, sealing the oil casing annulus and completing the setting of the self-setting packer.

[0040] like Figure 5As shown, the present invention also discloses a setting control mechanism for a self-setting packer with pre-set soluble medium, comprising: a control body 1, a first soluble material block 3, a soluble medium 4, an injection hole 7, a second soluble material block 11 and a sealing mechanism; The control body 1 is provided with a first soluble material block 3 and a second soluble material block 11 (ie, located at both ends of the control body 1), and an injection hole 7 is opened on the side wall. Figure 6 ); A sealing mechanism is provided in the injection hole 7; A cavity is provided between the first soluble material block 3 and the second soluble material block 11 , and the soluble medium 4 is accommodated in the cavity.

[0041] In some embodiments, the sealing mechanism includes a sealing plug 8 and a second sealing ring 9; A plurality of second sealing rings 9 are provided on the outer wall of the sealing plug 8; The sealing plug 8 is provided with a cone tip.

[0042] The plug 8 cooperates with the injection hole 7 and seals the injection hole 7 .

[0043] In some embodiments, the setting control mechanism for the self-setting packer pre-set with a soluble medium further includes a first sealing ring 2; A first sealing ring 2 is provided on the outer wall of each of the first soluble material block 3 and the second soluble material block 11 .

[0044] Optionally, a groove is provided at one end of the first soluble material block 3 close to the injection hole 7; A groove is provided at one end of the second soluble material block 11 close to the injection hole 7 .

[0045] The groove is optional and is determined based on actual needs. If the contact area between the soluble medium 4 and the soluble material can meet the dissolution requirements, the groove does not need to be processed. On the contrary, if the contact area cannot meet the dissolution requirements, the groove is processed.

[0046] In some embodiments, the setting control mechanism for the self-setting packer pre-set with a soluble medium further includes a solvent capsule 10; The solvent capsule 10 is disposed in the cavity, that is, between the first soluble material block 3 and the second soluble material block 11 .

[0047] The soluble medium 4 is disposed in the solvent capsule 10 .

[0048] The present invention discloses a method for using a setting control mechanism for a self-setting packer with a pre-set soluble medium, comprising the following steps: Step 1: Select a soluble medium 4 that matches the type of soluble material selected; Step 2: Determine the concentration of the soluble medium 4 based on the time required for the self-setting packer to be lowered into the predetermined position in the well + the safety guarantee time, and determine the setting time of the self-setting packer; Step 3: Encapsulating the soluble medium 4 in the solvent capsule 10; Step 4: Follow Figure 5 The assembly shown includes a control body 1, a first dissolvable material block 3, a second dissolvable material block 11, and a solvent capsule 10; Step 5: Place the assembled self-setting packer pre-set soluble medium setting control mechanism into the self-setting packer; Step 6: Screw the tapered plug 8 into the injection hole 7 to puncture the solvent capsule 10. The soluble medium 4 now contacts the first soluble material block 3 and the second soluble material block 11, causing the soluble materials to dissolve and the packer setting timer to begin. Step 7: Lower the self-setting packer into the well and lower it to the predetermined position before the self-setting packer starts to set; Step 8: When the setting time of the self-setting packer is reached, the first soluble material block 3 and the second soluble material block 11 dissolve, and the closed cavity of the setting piston of the self-setting packer is connected to the wellbore fluid space. Under the action of the wellbore fluid column pressure, the piston pushes the rubber sleeve to compress, sealing the oil casing annulus and completing the setting of the self-setting packer.

[0049] The present invention designs a method for pre-setting NaCl or KCl or other soluble medium 4 in the packer. In this way, the soluble medium 4 is placed in the packer before the packer is lowered into the well, which can ensure the dissolution rate and time of the soluble material, effectively control the setting time of the self-setting packer, and ensure the construction operation of the self-setting packer.

[0050] Dissolvable materials have never been used in the setting control of packers. The present invention utilizes the solubility of dissolvable materials to develop an automatic setting control method for self-setting packers. Specifically, before the packer is placed in the wellbore, a soluble medium 4 is mixed with the dissolvable material. The soluble material begins to dissolve under the action of the soluble medium 4. Once the packer is lowered to the desired position, the soluble material dissolves, and the packer's sealed chamber, sealed with the soluble material, becomes fluidically connected to the wellbore. Under the pressure of the wellbore's fluid column, the hydraulic pressure in the sealed chamber acts on the piston, which pushes the rubber sleeve to compress, completing the setting of the packer.

[0051] Since the soluble medium 4 is prefabricated in advance and the components of the soluble medium 4 are determined, the dissolution rate of the soluble material is determined, and the dissolution time is also determined, that is, the time for the packer to be lowered into the well and set can also be determined, which provides a guarantee for ensuring the setting of the packer.

[0052] In some embodiments, the setting control mechanism can be an independent component or can be integrated with the self-setting packer.

[0053] In some embodiments, the setting control mechanism is not limited to use in self-setting packers but can also be used in other control devices.

[0054] The setting control mechanism of the self-setting packer pre-setting soluble medium is not limited to the examples shown in the figures, and the pre-prepared soluble medium 4 ensures the uniformity of the dissolution time of the soluble material, which is within the protection scope of the present application.

[0055] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent replacements can be made to some of the technical features; and such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A setting control mechanism for a self-setting packer with a pre-set soluble medium, characterized in that: include: A control body (1), a first soluble material block (3), a soluble medium (4), an injection hole (7), and a sealing mechanism; A first soluble material block (3) is provided in the control body (1), and an injection hole (7) is provided on the side wall; A sealing mechanism is provided in the injection hole (7); A cavity is provided in the first soluble material block (3), and a soluble medium (4) is accommodated in the cavity.

2. The setting control mechanism for a self-setting packer with pre-set soluble medium according to claim 1, characterized in that: The sealing mechanism comprises a sealing plug (8) and a second sealing ring (9); A plurality of second sealing rings (9) are provided on the outer wall of the sealing plug (8).

3. The setting control mechanism for a self-setting packer with pre-set soluble medium according to claim 1 or 2, characterized in that: It also includes a first sealing ring (2) and a circulation groove (6); First sealing rings (2) are provided on both ends of the outer wall of the first soluble material block (3); A plurality of flow slots (6) are provided on the circumference of the outer wall of the first soluble material block (3), and the flow slots (6) are respectively connected to the cavity and the injection hole (7); The setting control mechanism is an independent component or is integrated with the self-setting packer.

4. A setting control mechanism for a self-setting packer with a pre-set soluble medium, characterized in that: include: A control body (1), a first soluble material block (3), a soluble medium (4), an injection hole (7), a second soluble material block (11), and a sealing mechanism; A first soluble material block (3) and a second soluble material block (11) are spaced apart in the control body (1), and an injection hole (7) is provided on the side wall; A sealing mechanism is provided in the injection hole (7); A cavity is provided between the first soluble material block (3) and the second soluble material block (11), and the cavity contains a soluble medium (4).

5. The setting control mechanism for a self-setting packer with pre-set soluble medium according to claim 4, characterized in that: The sealing mechanism comprises a sealing plug (8) and a second sealing ring (9); A plurality of second sealing rings (9) are provided on the outer wall of the sealing plug (8).

6. The setting control mechanism for a self-setting packer with pre-set soluble medium according to claim 4, characterized in that: It also includes a first sealing ring (2), a positioning ring (5) and a circulation groove (6); A first sealing ring (2) is provided on the outer wall of each of the first soluble material block (3) and the second soluble material block (11); The positioning ring (5) is arranged between the first soluble material block (3) and the second soluble material block (11), and a plurality of flow grooves (6) are arranged on the circumference of the outer wall of the positioning ring (5), and the flow grooves (6) are connected to the injection hole (7); The setting control mechanism is an independent component or is integrated with the self-setting packer.

7. A setting control mechanism for a self-setting packer with pre-set soluble medium, characterized in that: include: A control body (1), a first soluble material block (3), a soluble medium (4), an injection hole (7), a second soluble material block (11), and a sealing mechanism; A first soluble material block (3) and a second soluble material block (11) are spaced apart in the control body (1), and an injection hole (7) is provided on the side wall; A sealing mechanism is provided in the injection hole (7); A cavity is provided between the first soluble material block (3) and the second soluble material block (11), and the cavity contains a soluble medium (4).

8. The setting control mechanism for a self-setting packer with pre-set soluble medium according to claim 7, characterized in that: The sealing mechanism comprises a sealing plug (8) and a second sealing ring (9); A plurality of second sealing rings (9) are provided on the outer wall of the sealing plug (8); The sealing plug (8) is provided with a conical tip.

9. The setting control mechanism for a self-setting packer with pre-set soluble medium according to claim 7, characterized in that: Also includes a first sealing ring (2); A first sealing ring (2) is provided on the outer wall of each of the first soluble material block (3) and the second soluble material block (11); The setting control mechanism is an independent component or is integrated with the self-setting packer.

10. The setting control mechanism for a self-setting packer with pre-set soluble medium according to claim 7, characterized in that: Also included is a solvent capsule (10); The solvent capsule (10) is arranged in the cavity; The soluble medium (4) is arranged in the solvent capsule (10).

Images