Rubber sleeve
By designing a protective sleeve mechanism in the rubber cylinder, including a bendable connection part and an outwardly expanding support part, the problem of the rubber cylinder being easily tear and blasted when expanding is solved, and the stability and sealing effect of the rubber cylinder are improved.
Patent Information
- Application Number
- CN202422249087.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-13
AI Technical Summary
When the existing rubber rubber barrel is expanded, due to the excessive local pressure of the ends of the upper and lower fixtures, the rubber barrel is prone to tear and blasts under the action of internal and external pressure, resulting in sealing failure.
A rubber cylinder including a protective sleeve mechanism is designed, which consists of a fixing part, a connecting part and a supporting part. The connecting part can be bent outward relative to the fixing part, and the support part expands outward when expanding, and provides additional expansion protection through a diamond hole.
Through the design of the protective sleeve mechanism, the rubber cylinder can form a perfect support when expanding, avoiding excessive bending and unstable amount, improving the reliability and protection effect of the structure, ensuring the effectiveness of the sealing.
Smart Images
Figure CN223034963U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rubber cylinders, in particular to a rubber cylinder. Background Art
[0002] A packer is a downhole tool connected to a downhole string and used to seal the annular space of an open-hole wellbore. A commonly used existing packer is a hydraulic expansion type external casing packer, which injects liquid between the casing and the rubber cylinder, and makes the rubber cylinder expand outward against the wellbore through hydraulic pressure, so as to achieve the purpose of sealing the annular space into an upper space and a lower space;
[0003] The rubber cylinder is a key component in the downhole packer and is closely related to the existing packer system. The rubber cylinder is usually made of high-strength rubber material and is designed to expand after liquid injection. Its structure includes an inner cavity space for liquid injection and an external elastic rubber layer. When liquid enters the inside of the rubber cylinder through the injection system, the rubber cylinder will expand outward and closely fit the wellbore, thereby effectively sealing the annular space of the wellbore and separating the upper space and the lower space;
[0004] When assembling the packer, as Figures 5 - 6 shown, the rubber cylinder is surrounded and fixed on the central pipe (casing) by an upper fixing member and a lower fixing member. Due to this fixing method, when the rubber cylinder expands, the local pressure at the ends of the upper and lower fixing members on the rubber cylinder is too high ( Figure 1 at the circled part in), which causes the rubber cylinder to be easily torn at this place, and then the torn part is extremely likely to burst under the action of the internal pressure between the casing and the rubber cylinder or the external pressure above the rubber cylinder in the annulus, resulting in the sealing failure of the rubber cylinder and causing irreparable losses, especially between the rubber cylinder and the lower fixing member (because cement slurry needs to be supported above the rubber cylinder). Therefore, a rubber cylinder is proposed to solve the above problems. Content of the Utility Model
[0005] In order to make up for the above deficiencies, the utility model provides a rubber cylinder, aiming to improve the problem that in the prior art, when the rubber cylinder expands, the local pressure at the ends of the upper and lower fixing members is too high, resulting in the rubber cylinder being easily torn and bursting under the action of internal and external pressures, thereby causing sealing failure.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a rubber cylinder, including a wellbore and a casing, a rubber cylinder is arranged on the middle side of the outer shaft of the casing, a protective sleeve mechanism is arranged on the right side of the rubber cylinder, a lower fixing member is arranged on the outer side of the protective sleeve mechanism, and an upper fixing member is arranged on the left side of the rubber cylinder;
[0007] As a further description of the above technical solution: The protective sleeve mechanism includes a fixing part, a connecting part, and a supporting part. A fixing part, a supporting part, and a connecting part connecting these two parts are arranged on the right side of the rubber cylinder. The connecting part can be bent outward relative to the fixing part;
[0008] As a further description of the above technical solution: A number of mounting protrusions are equidistantly and fixedly connected to the middle side of the outside of the fixing part. One side of the mounting protrusion has a guiding inclined surface, and the other side of the mounting protrusion retains a sharp corner;
[0009] As a further description of the above technical solution: A number of strip holes are spaced apart in the area of the fixing part where the mounting protrusions are located. The supporting part is equidistantly provided with a number of long strip holes from the end towards the fixing part;
[0010] As a further description of the above technical solution: A number of diamond-shaped holes are equidistantly arranged on the outside of the supporting part;
[0011] As a further description of the above technical solution: Positioning grooves matching the mounting protrusions of the fixing part are equidistantly arranged inside the lower fixing part, and the mounting protrusions are all engaged with the positioning grooves;
[0012] As a further description of the above technical solution: The protective sleeve mechanism is made of integral stainless steel;
[0013] As a further description of the above technical solution: Cement slurry is arranged between the rubber cylinder and the upper fixing part. The rubber cylinder is in contact with the well wall, and a liquid is arranged between the rubber cylinder and the casing.
[0014] The utility model has the following beneficial effects:
[0015] 1. In the utility model, through the cooperation of structures such as the protective sleeve mechanism, the connecting part can be bent outward relative to the fixing part, and the bending part is formed manually. When the rubber cylinder expands, it can form a perfect support with the lower fixing part. Compared with a straight connecting structure, on the one hand, the problem of excessive bending amount is avoided, and on the other hand, the stability is improved, and it can better adapt to the expansion of the rubber cylinder, ensuring the reliability of the structure during use.
[0016] 2. In the utility model, through the cooperation of structures such as the protective sleeve mechanism, the supporting part is provided with long strip holes at intervals from the end towards the fixing part. When the rubber cylinder expands, the supporting part can expand outward, and the more long strip holes, the better, because after expansion, the area of each long strip hole becomes smaller, and it is not easy for the rubber cylinder to be extruded from the long strip holes; and the supporting part is also evenly provided with diamond-shaped holes, similar to an expanded metal mesh, so that the expansion protection effect is better, improving the protection effect on the rubber cylinder. Description of the Drawings
[0017] Figure 1The overall structure diagram of a rubber cylinder proposed by the present utility model;
[0018] Figure 2 The cross-sectional view of a rubber cylinder proposed by the present utility model;
[0019] Figure 3 For Figure 1 The detailed enlarged view of the protective sleeve mechanism in the overall structure diagram in
[0020] Figure 4 For Figure 1 The partial enlarged view of the protective sleeve mechanism in the overall structure diagram in
[0021] Figure 5 The comparative structure diagram of a rubber cylinder proposed by the present utility model;
[0022] Figure 6 The comparative cross-sectional view of a rubber cylinder proposed by the present utility model.
[0023] Legend:
[0024] 1. Upper fixing part; 2. Wellbore wall; 3. Rubber cylinder; 4. Liquid; 5. Casing; 6. Lower fixing part; 7. Cement slurry; 8. Protective sleeve mechanism; 801. Fixing part; 802. Installation protrusion; 803. Connecting part; 804. Long strip hole; 805. Supporting part; 806. Strip hole; 807. Diamond hole; 9. Positioning groove. Specific implementation manners
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0026] Refer to Figures 1 - 4, an embodiment provided by the present utility model: a rubber cylinder, including a wellbore 2 and a casing 5. A rubber rubber cylinder 3 is provided on the middle side of the outer shaft of the casing 5. A protective sleeve mechanism 8 is provided on the right side of the rubber rubber cylinder 3. A lower fixing member 6 is provided on the outer side of the protective sleeve mechanism 8. An upper fixing member 1 is provided on the left side of the rubber rubber cylinder 3. The protective sleeve mechanism 8 includes a fixing portion 801, a connecting portion 803, and a supporting portion 805. A fixing portion 801, a supporting portion 805, and a connecting portion 803 connecting these two portions are provided on the right side of the rubber rubber cylinder 3. The connecting portion 803 can be bent outward relative to the fixing portion 801. A plurality of mounting protrusions 802 are equidistantly and fixedly connected to the middle side of the outside of the fixing portion 801. One side of the mounting protrusion 802 has a guiding inclined surface, and the other side retains a sharp corner. A plurality of strip holes 806 are spaced apart in the area of the fixing portion 801 having the mounting protrusions 802. The supporting portion 805 is equidistantly provided with a plurality of long strip holes 804 in the direction from the end towards the fixing portion 801. A plurality of diamond holes 807 are equidistantly provided on the outside of the supporting portion 805. A positioning groove 9 matching the mounting protrusions 802 of the fixing portion 801 is equidistantly provided inside the lower fixing member 6. The mounting protrusions 802 are all engaged with the positioning groove 9. The protective sleeve mechanism 8 is made of integral stainless steel material. A cement slurry 7 is provided between the rubber rubber cylinder 3 and the upper fixing member 1. The rubber rubber cylinder 3 is in contact with the wellbore 2. A liquid 4 is provided between the rubber rubber cylinder 3 and the casing 5.
[0027] First, through the fixing portion 801, the supporting portion 805, and the connecting portion 803 connecting these two portions, the connecting portion 803 can be bent outward relative to the fixing portion 801. The bending part is formed manually. When the rubber cylinder 3 expands, the connecting portion 803 will bend to form a perfect support with the lower fixing member 6. If it is straight, on the one hand, the bending amount is too large, and on the other hand, it is unstable. And it is made of integral stainless steel material, which is easy to process, has strong integrity, and is easy to assemble; the fixing portion 801 has mounting protrusions 802. One side of the mounting protrusion 802 has a guiding inclined surface, and the other side retains a sharp corner. The purpose is that the guiding installation is easy, and when the rubber cylinder 3 expands, it will pull the fixing portion 801 outward, and the sharp corner can prevent the protective sleeve from coming off and failing; a plurality of strip holes 806 are spaced apart in the area of the fixing portion 801 having the mounting protrusions 802. The purpose is to allow the fixing portion 801 to be concavely deformed during assembly, so that the mounting protrusions 802 can easily enter; the supporting portion 805 is spaced apart with a plurality of long strip holes 804 in the direction from the end towards the fixing portion 801. The purpose is that when the rubber cylinder 3 expands, the supporting portion 805 can expand outward. The more long strip holes 804, the better, because after expansion, the area of each long strip hole 804 will be small, and the rubber cylinder 3 cannot be squeezed out from the long strip holes 804; the supporting portion 805 is evenly provided with diamond holes 807, which is similar to an expanded metal mesh. Initially, it is almost closed, and this effect is produced after expansion, and the expansion protection effect is better.
[0028] Working principle: First, through the fixing part 801, the supporting part 805 and the connecting part 803 connecting these two parts, the connecting part 803 can be bent outward relative to the fixing part 801. The bending part is formed manually. When the rubber cylinder 3 expands, the connecting part 803 will bend to form a perfect support with the lower fixing part 6. If it is straight, on the one hand, the bending amount is too large, and on the other hand, it is unstable. Moreover, it is made of integral stainless steel material, which is easy to process, has strong integrity, and is easy to assemble; the fixing part 801 has an installation protrusion 802. One side of the installation protrusion 802 has a guiding inclined surface, and the other side retains a sharp corner. The purpose is to make the guiding installation easy, and when the rubber cylinder 3 expands, it will pull the fixing part 801 outward, and the sharp corner can prevent the protective sleeve from slipping off and failing; in the area of the fixing part 801 with the installation protrusion 802, strip holes 806 are spaced apart. The purpose is to allow the fixing part 801 to be concave and deformed during assembly, so that the installation protrusion 802 can easily enter; the supporting part 805 is provided with long strip holes 804 at intervals from the end towards the direction of the fixing part 801. The purpose is that when the rubber cylinder 3 expands, the supporting part 805 can expand outward. The more long strip holes 804, the better, because after expansion, the area of each long strip hole 804 will be small, and the rubber cylinder 3 cannot be squeezed out from the long strip holes 804; the supporting part 805 is evenly provided with diamond-shaped holes 807, which is similar to an expanded metal mesh. Initially, it is almost closed, and this effect is produced after expansion, and the expansion protection effect is better.
[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A rubber cartridge, comprising a well wall (2) and a casing (5), characterized in that: A rubber sleeve (3) is arranged at the middle side of the outer shaft of the sleeve (5), a protective sleeve mechanism (8) is arranged on the right side of the rubber sleeve (3), a lower fixing member (6) is arranged on the outer side of the protective sleeve mechanism (8), and an upper fixing member (1) is arranged on the left side of the rubber sleeve (3).
2. A rubber cartridge according to claim 1, characterized in that: The protective sleeve mechanism (8) comprises a fixing portion (801), a connecting portion (803), and a supporting portion (805); the right side of the rubber sleeve (3) is provided with a fixing portion (801), a supporting portion (805), and a connecting portion (803) connecting the two portions; the connecting portion (803) can be bent outward relative to the fixing portion (801).
3. A rubber cartridge according to claim 2, characterized in that: A plurality of mounting protrusions (802) are fixedly connected at equal intervals to the middle side of the exterior of the fixing portion (801); one side of the mounting protrusion (802) has a guiding inclined surface, and the other side of the mounting protrusion (802) retains a sharp corner.
4. A rubber cartridge according to claim 2, characterized in that: The fixing portion (801) has a region with a mounting protrusion (802) with a plurality of strip holes (806) spaced apart therefrom, and the supporting portion (805) has a plurality of long strip holes (804) equidistantly spaced apart from the end portion in a direction toward the fixing portion (801).
5. A rubber cartridge according to claim 2, characterized in that: A plurality of diamond-shaped holes (807) are evenly spaced outside the support portion (805).
6. A rubber cartridge according to claim 1, characterized in that: Positioning grooves (9) cooperating with the mounting protrusions (802) of the fixing portion (801) are equidistantly provided inside the lower fixing member (6), and the mounting protrusions (802) are all engaged with the positioning grooves (9).
7. A rubber cartridge according to claim 1, characterized in that: The protective sleeve mechanism (8) is made of an integral stainless steel material.
8. The rubber cartridge according to claim 1, characterized in that: Cement slurry (7) is provided between the rubber rubber tube (3) and the upper fixing member (1), the rubber rubber tube (3) is in contact with the well wall (2), and liquid (4) is provided between the rubber rubber tube (3) and the casing (5).