Sealing mechanism and expansion pipe
By alternately setting elastic and plastic sealing sleeves on the expansion tube, a multi-segment sealing structure is formed, which solves the problem of poor sealing of the expansion tube and achieves stable sealing effect and cost reduction.
Patent Information
- Application Number
- CN202423238529.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing expansion tube sealing mechanisms are prone to failure at high temperatures, resulting in inadequate sealing, and are also complex and costly.
A multi-segment sealing structure is formed by alternating n-segment elasto-plastic sealing sleeves and n-1-segment plastic sealing sleeves. The plastic sealing sleeve expands due to the compression of adjacent elasto-plastic sealing sleeves, enhancing the sealing effect. Soft metal components are used to reduce costs.
It achieves stable sealing during expansion pipe patching construction, enhances the sealing effect, has a simple structure, and reduces manufacturing costs.
Smart Images
Figure CN223563464U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of expansion pipe, and particularly relates to a sealing mechanism and expansion pipe. BACKGROUND
[0002] Expansion pipe technology is a technology that makes a metal round pipe expand in the diameter direction by a certain percentage (usually 10% to 30%) under the well, so as to improve the strength and rigidity of the pipe material while keeping good plasticity. The expansion pipe technology is a new technology that rapidly rises in the oil industry. The application fields of the expansion pipe mainly include the following aspects: (1) optimizing the well structure, reducing the casing level, which can reduce the open hole diameter and save the drilling cost; (2) sealing complex formations; (3) when the designed casing fails to be lowered to the predetermined position due to various reasons and leaves drilling hidden dangers, the expansion pipe can be used for remediation to seal the formation that fails to be sealed; (4) using the expansion pipe technology to perform casing repair operation; (5) using the expandable pipe as the production casing to increase the wellbore drainage area, which is beneficial to the implementation and maintenance of the subsequent wellbore stimulation measures.
[0003] The expansion pipe and the sealing mechanism at both ends of the expansion pipe are structures that are directly associated with the oil casing during the expansion pipe repair construction of the oil casing. The existing sealing mechanism of the expansion pipe still has the problem of poor sealing effect during actual use. For example, the rubber expansion pipe sealing mechanism is easy to fail at high temperature; the sealing is not tight, and the effect is not good. The expansion pipe with good sealing effect has a complex structure and is more expensive. CONTENT OF THE INVENTION
[0004] The application aims to at least solve the technical problem of expansion pipe sealing to some extent. To this end, the application provides a sealing mechanism and expansion pipe, which can effectively seal the pipe used during repair, play a stable sealing role, and enhance the sealing effect; meanwhile, the structure is simple, and the manufacturing cost is low.
[0005] In a first aspect, an embodiment of the application provides a sealing mechanism installed on a pipe, comprising:
[0006] n segments of elastic-plastic sealing sleeves and n-1 segments of plastic sealing sleeves, n is an integer greater than or equal to 2, the n segments of elastic-plastic sealing sleeves and the n-1 segments of plastic sealing sleeves are used to be sleeved on the outer wall of the pipe, and are alternately arranged, the two ends of the plastic sealing sleeve in the axial direction abut between the adjacent elastic-plastic sealing sleeves, and the plastic sealing sleeve can protrude outward in the radial direction under the extrusion of the adjacent elastic-plastic sealing sleeves.
[0007] In some embodiments, the axial end of the elastic-plastic sealing sleeve is provided with an annular groove, so that the plastic sealing sleeve is matched by being embedded in the annular groove between the adjacent elastic-plastic sealing sleeves.
[0008] In some embodiments, the plastic sealing sleeve comprises a first protrusion and two second protrusions divided in the axial direction, and the two second protrusions are respectively connected to the two sides of the first protrusion.
[0009] In some embodiments, the first protrusion is located between the ends of the adjacent elastic-plastic sealing sleeve, and the second protrusion is embedded in the annular groove.
[0010] In some embodiments, the width of the first protrusion gradually decreases from the inside to the outside in the radial direction of the plastic sealing sleeve, so that the first protrusion is trapezoidal in the axial cross-section.
[0011] In some embodiments, the connection between the first protrusion and the second protrusion forms a notch.
[0012] In some embodiments, in the radial direction of the plastic sealing sleeve, the circumferential outer wall of the second protrusion is lower than the circumferential outer wall of the elastic-plastic sealing sleeve by [1mm, 3mm].
[0013] In some embodiments, the plastic sealing sleeve is an annular structure made of a soft metal material.
[0014] In the second aspect, the embodiments of the present application provide an expansion pipe, which comprises a pipe, and n elastic-plastic sealing sleeves and n-1 plastic sealing sleeves sleeved on at least one end of the pipe, n is an integer greater than or equal to 2, the n elastic-plastic sealing sleeves and the n-1 plastic sealing sleeves are all used to sleeve the outer wall of the pipe and are arranged alternately, the two ends of the plastic sealing sleeve in the axial direction abut between the adjacent elastic-plastic sealing sleeves, and the plastic sealing sleeve can protrude outward in the radial direction under the extrusion of the adjacent elastic-plastic sealing sleeves.
[0015] In some embodiments, the plastic sealing sleeve is an annular structure made of a soft metal material, the axial end of the elastic-plastic sealing sleeve is provided with an annular groove, the two sides of the annular structure are embedded in the annular grooves of the adjacent elastic-plastic sealing sleeves, the middle part of the annular structure is located between the annular grooves of the adjacent elastic-plastic sealing sleeves, and the middle part of the annular structure can protrude outward in the radial direction under the extrusion of the two sides of the annular structure.
[0016] From the above technical solutions, the beneficial effects of the present application are as follows:
[0017] 1. The present application forms a multi-segment sealing structure by n elastic-plastic sealing sleeves and n-1 plastic sealing sleeves, which has both elastic-plastic sealing and plastic sealing. The elastic-plastic sealing sleeve plays a general sealing role, and under the extrusion of the adjacent elastic-plastic sealing sleeves, the elastic-plastic sealing sleeve deforms and expands outward relative to the elastic-plastic sealing sleeve. Meanwhile, the plastic sealing sleeve is multi-segment, which is equivalent to increasing multiple seals for the external pipeline. Therefore, the present application can effectively seal the pipe used in the field, play a stable sealing role, and enhance the sealing effect.
[0018] 2、The application forms the alternating sealing structure of elasticity and plasticity by setting the multi-section elastic-plastic sealing sleeve and the multi-section plastic sealing sleeve at least one end of the expansion pipe, the plastic sealing sleeve can be expanded by the extrusion of the adjacent elastic-plastic sealing sleeve to the plastic sealing sleeve, and the sealing effect is effectively enhanced, and the structure is simple and the manufacturing cost is low. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be simply introduced one by one below, and obviously, the drawings in the following description are some embodiments of the present application, and other embodiments and drawings can be obtained by the drawings without creative labor.
[0020] Figure 1 An embodiment schematic view of the sealing mechanism is shown;
[0021] Figure 2 An embodiment schematic view of the sealing mechanism is shown; Figure 1 An embodiment enlarged schematic view of the circle is shown;
[0022] Figure 3 An embodiment enlarged schematic view of the circle is shown; Figure 1 An embodiment enlarged schematic view of the circle is shown;
[0023] Figure 4 An embodiment schematic view of the expansion pipe is shown;
[0024] The drawings show that: 100, a sealing mechanism; 110, an elastic-plastic sealing sleeve; 111, an annular groove; 120, a plastic sealing sleeve; 121, a first protrusion; 122, a second protrusion; 123, a notch; 200, a pipe fitting. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the present application.
[0026] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.
[0027] In the utility model, unless another definite provision and limitation, the term "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two element internal communication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, the above-mentioned term can be understood according to the specific meaning in the utility model.
[0028] In addition, in the utility model, the description such as "first", "second" is only used for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0029] The application will be described below in conjunction with the drawings and specific embodiments:
[0030] Please refer to Figure 1The first aspect of the present application provides a sealing mechanism 100 mounted on a pipe 200, comprising n segments of elastic-plastic sealing sleeves 110 and n-1 segments of plastic sealing sleeves 120, n is an integer greater than or equal to 2, for example, the elastic-plastic sealing sleeve is 3 segments, and the plastic sealing sleeve is 2 segments. The elastic-plastic sealing sleeve 110 is a rubber sealing sleeve made of rubber material, and other materials that can deform elastically and plastically during sealing can also be used. The plastic sealing sleeve 120 is a soft metal sealing sleeve, and other materials that can deform plastically during sealing can also be used. The elastic-plastic sealing sleeve 110 and the plastic sealing sleeve 120 are both provided in multiple, and the number of elastic-plastic sealing sleeves 110 is one more than the number of plastic sealing sleeves 120. The n segments of elastic-plastic sealing sleeves 110 and the n-1 segments of plastic sealing sleeves 120 are both used to be sleeved on the outer wall of the pipe 200, and are arranged alternately, that is, from one end of the sealing mechanism 100 to the other end, they are respectively elastic-plastic sealing sleeve 110, plastic sealing sleeve 120, …, elastic-plastic sealing sleeve 110, thus forming an alternating arrangement structure. In this way, the elastic-plastic sealing sleeve 110 and the plastic sealing sleeve 120 are both arranged at intervals, the elastic-plastic sealing sleeve 110 is located between the two adjacent plastic sealing sleeves 120, and the two ends of the plastic sealing sleeve 120 in the axial direction abut between the adjacent elastic-plastic sealing sleeves 110, so that the plastic sealing sleeve 120 is clamped in the interval between the adjacent elastic-plastic sealing sleeves 110. The plastic sealing sleeve 120 can protrude outward along the radial direction under the extrusion of the adjacent elastic-plastic sealing sleeve 110, that is, the plastic sealing sleeve 120 protrudes outward after being subjected to the axial force, and the plastic sealing sleeve 120 expands outward relative to the elastic-plastic sealing sleeve 110. This structure is simple, and the application of this structure to the pipe 200 can save costs.
[0031] The sealing mechanism of the existing technology expansion pipe has the problem of poor sealing effect. The sealing mechanism is used to reinforce the external pipeline during the expansion pipe patching construction, but the sealing is not tight and the effect is not good. The present application forms a multi-segment sealing structure through n segments of elastic-plastic sealing sleeves 110 and n-1 segments of plastic sealing sleeves 120, which has both elastic-plastic sealing and plastic sealing. The elastic-plastic sealing sleeve 110 plays a general sealing role, and the elastic-plastic sealing sleeve 110 deforms under the extrusion of the adjacent elastic-plastic sealing sleeve 110 and expands outward relative to the elastic-plastic sealing sleeve 110. At the same time, the plastic sealing sleeve 120 is multi-segment, which is equivalent to adding multiple seals to the external pipeline. Therefore, the present application can effectively seal the pipe 200 used during the patching and play a stable sealing role to enhance the sealing effect.
[0032] Please refer to Figure 2In some embodiments, the axial end of the elastoplastic sealing sleeve 110 is provided with an annular groove 111, which is arranged along the circumference of the elastoplastic sealing sleeve 110, so that the adjacent elastoplastic sealing sleeves 110 are matched by embedding the plastic sealing sleeve 120 in the annular groove 111. The annular groove 111 is arranged at the axial end of the elastoplastic sealing sleeve 110, and is arranged at both ends. The annular groove 111 is close to the inner side of the elastoplastic sealing sleeve 110, so that the part of the plastic sealing sleeve 120 is limited in the radial direction by the elastoplastic sealing sleeve 110. The shape and size of the part of the plastic sealing sleeve 120 are matched with the annular groove 111, for example, the two sides of the plastic sealing sleeve 120 can be clamped into the annular groove 111, and the middle part of the plastic sealing sleeve 120 is located in the interval between the adjacent elastoplastic sealing sleeves 110. Thus, the two sides of the plastic sealing sleeve 120 are extruded by the adjacent elastoplastic sealing sleeves 110 during use, and the middle part of the plastic sealing sleeve 120 is extruded outward.
[0033] Please refer to Figure 3 In some embodiments, the plastic sealing sleeve 120 includes a first protrusion 121 and two second protrusions 122 divided along the axial direction. The two second protrusions 122 are respectively connected to the two sides of the first protrusion 121, i.e., the second protrusion 122, the first protrusion 121 and the second protrusion 122 along the axial direction of the plastic sealing sleeve 120. In the radial direction of the plastic sealing sleeve 120, the size of the first protrusion 121 is larger than that of the second protrusion 122. In some embodiments, the first protrusion 121 is located between the ends of the adjacent elastoplastic sealing sleeves 110, and the second protrusion 122 is embedded in the annular groove 111. The plastic sealing sleeve 120 is clamped with the elastoplastic sealing sleeve 110 through the second protrusion 122, and the first protrusion 121 is not constrained by the annular groove 111, but is extruded by the two second protrusions 122. In some embodiments, in the radial direction of the plastic sealing sleeve 120, the circumferential outer wall of the second protrusion 122 is lower than the circumferential outer wall of the elastoplastic sealing sleeve 110 by [1mm, 3mm], such as 1mm, 2mm or 3mm. The circumferential outer wall of the second protrusion 122 is lower than the circumferential outer wall of the elastoplastic sealing sleeve 110, forming a concave shape.
[0034] In some embodiments, the width of the first protrusion 121 gradually decreases from the inside to the outside along the radial direction of the plastic sealing sleeve 120, so that the first protrusion 121 is trapezoidal in the axial cross section, and the width of the first protrusion 121 refers to the width along the axial direction of the plastic sealing sleeve 120, so that the width of the first protrusion 121 near the outside is greater than the width near the inside, and this shape helps the first protrusion 121 to protrude outward when subjected to force from both sides. In some embodiments, the connection between the first protrusion 121 and the second protrusion 122 forms a notch 123, the first protrusion 121 extends outward along the radial direction of the plastic sealing sleeve 120, and the second protrusion 122 extends to both sides along the axial direction of the plastic sealing sleeve 120, and the connection between the first protrusion 121 and the second protrusion 122 is recessed inward to form the notch 123, the formation of the notch 123 can be that the outer wall of the second protrusion 122 is recessed inward, for example, the second protrusion 122 is recessed with a wedge-shaped groove at the above-mentioned connection, the formation of the notch 123 can also be that the first protrusion 121 and the second protrusion 122 are jointly arranged, for example, the two side surfaces of the first protrusion 121 are inclined surfaces, and the second protrusion 122 is recessed with a wedge-shaped groove at the connection; through the above-mentioned arrangement of the notch 123, when the second protrusion 122 is subjected to the action from the elastoplastic sealing sleeve 110, the first protrusion 121 can be more easily extruded, facilitating extrusion to deform, so that the first protrusion 121 protrudes outward to form a seal. In some embodiments, the plastic sealing sleeve 120 is an annular structure made of a soft metal material, and the soft metal can be aluminum, copper, etc., preferably red copper, and the plastic sealing sleeve 120 is an annular structure, i.e., the size in the axial direction is small, which can reduce the cost while maintaining the sealing effect.
[0035] Please refer to Figure 4 The second aspect of the present application provides an expansion pipe, characterized in that it comprises a pipe 200, and n elastoplastic sealing sleeves 110 and n-1 plastic sealing sleeves 120 arranged on at least one end of the pipe 200, n is an integer greater than or equal to 2, and the above-mentioned sealing mechanism 100 can be arranged at both ends of the expansion pipe to ensure the sealing effect of both ends of the expansion pipe, the n elastoplastic sealing sleeves 110 and the n-1 plastic sealing sleeves 120 are arranged alternately on the outer wall of the pipe 200, and the two ends of the plastic sealing sleeve 120 in the axial direction abut between adjacent elastoplastic sealing sleeves 110, and the plastic sealing sleeve 120 can protrude outward along the radial direction under the extrusion of the adjacent elastoplastic sealing sleeve 110, and the specific sealing structure is as described above.
[0036] The sealing mechanism of the prior art expansion pipe adopts conventional sealing materials, and has the problem of poor sealing effect. The sealing mechanism is used to reinforce the external pipeline during the expansion pipe patching construction, but the sealing is not tight and the effect is not good. The expansion pipe structure with strong sealing effect is complex and has high manufacturing cost. The present application sets multiple elastic-plastic sealing sleeves 110 and multiple plastic sealing sleeves 120 at least one end of the expansion pipe, forms an elastic-plastic and plastic alternating sealing structure, and through the extrusion of the adjacent elastic-plastic sealing sleeve 110 on the plastic sealing sleeve 120, the plastic sealing sleeve 120 can be expanded, thereby strengthening the sealing of the external pipeline, effectively enhancing the sealing effect, and the structure is simple and the manufacturing cost is low.
[0037] In some embodiments, the plastic sealing sleeve 120 is an annular structure made of a soft metal material, i.e., a soft metal sealing sleeve. The axial end of the elastic-plastic sealing sleeve 110 is provided with an annular groove 111, the two sides of the annular structure are embedded in the annular groove 111 of the adjacent elastic-plastic sealing sleeve 110, and the middle part of the annular structure is located between the annular grooves 111 of the adjacent elastic-plastic sealing sleeves 110. The middle part of the annular structure can protrude radially outward under the extrusion of the two sides of the annular structure. The expansion pipe of the present application can be used for patching construction. According to the application situation, the total volume of the soft metal sealing sleeve before construction is 70-80% of the annular volume of the soft metal sealing sleeve after construction.
[0038] After the application is applied to the expansion pipe, in the process of connecting the two ends of the expansion pipe with other structures to form a seal, the rubber sealing sleeve is compressed, and therefore the end of the rubber sealing sleeve at the annular groove 111 is compressed against the second protrusion 122. The second protrusion 122 is extruded on both sides of the soft metal sealing ring, a small part of which is in contact with the groove bottom of the annular groove 111 and forms support for the rubber sealing sleeve, thereby enhancing the sealing effect of the rubber sealing sleeve. Most of the second protrusion 122 is extruded to the first protrusion 121, and the first protrusion 121 is extruded outward to play a stable sealing role. In the use process, a small amount of soft metal material is used in sections, which saves cost and prevents invalid stacking of soft metal material. The sealing effect of the two ends of the expansion pipe is continuously effective while ensuring the sealing effect and saving cost.
[0039] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", "optional example" or "optional implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.
[0040] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.
[0041] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.
Claims
1. A sealing mechanism, characterized by, The utility model is installed in pipe fitting (200), includes: n segment elastoplastic sealing sleeve (110) and n-1 segment plastic sealing sleeve (120), n is the integer of equal to or greater than 2, n segment elastoplastic sealing sleeve (110) and n-1 segment plastic sealing sleeve (120) are used to set in the outer wall of pipe fitting (200), and the alternating arrangement, the axial both ends of plastic sealing sleeve (120) respectively butt in adjacent elastoplastic sealing sleeve (110) between, plastic sealing sleeve (120) can extrude along radially outward bulge under adjacent elastoplastic sealing sleeve (110).
2. The sealing mechanism of claim 1, wherein, The axial end of elastoplastic sealing sleeve (110) is equipped with annular groove (111), and the plastic sealing sleeve (120) is embedded in the annular groove (111) matching between adjacent elastoplastic sealing sleeve (110).
3. The sealing mechanism of claim 2, wherein, Plastic sealing sleeve (120) includes first protrusion (121) and two second protrusions (122) divided along the axial direction, and two second protrusions (122) are connected to the two sides of first protrusion (121) respectively.
4. The sealing mechanism of claim 3, wherein, First protrusion (121) is located between the end of adjacent elastoplastic sealing sleeve (110), and second protrusion (122) is embedded in annular groove (111).
5. The sealing mechanism of claim 4, wherein, From inside to outside along the radial direction of plastic sealing sleeve (120), the width of first protrusion (121) gradually decreases, so that first protrusion (121) is trapezoidal on the axial cross section.
6. The sealing mechanism of claim 4, wherein, The connection of first protrusion (121) and second protrusion (122) forms notch (123).
7. The sealing mechanism of claim 4, wherein, In the radial direction of plastic sealing sleeve (120), the circumferential outer wall of second protrusion (122) is lower than the size of the circumferential outer wall of elastoplastic sealing sleeve (110) [1mm, 3mm].
8. The sealing mechanism according to any one of claims 1 to 7, wherein Plastic sealing sleeve (120) is annular structure made of soft metal material.
9. An expanded tube, characterized by The utility model relates to pipe fitting (200) and n segment elastoplastic sealing sleeve (110) and n-1 segment plastic sealing sleeve (120) set in at least one end of pipe fitting (200), n is the integer of equal to or greater than 2, n segment elastoplastic sealing sleeve (110) and n-1 segment plastic sealing sleeve (120) are used to set in the outer wall of pipe fitting (200), and the alternating arrangement, the axial both ends of plastic sealing sleeve (120) respectively butt in adjacent elastoplastic sealing sleeve (110) between, plastic sealing sleeve (120) can extrude along radially outward bulge under adjacent elastoplastic sealing sleeve (110).
10. The expanded tubular of claim 9, wherein, Plastic sealing sleeve (120) is annular structure made of soft metal material, the axial end of elastoplastic sealing sleeve (110) is equipped with annular groove (111), both sides of annular structure are embedded in the annular groove (111) of adjacent elastoplastic sealing sleeve (110), the middle part of annular structure is located between the annular groove (111) of adjacent elastoplastic sealing sleeve (110), and the middle part of annular structure can extrude along radially outward bulge under both sides of annular structure.