Full-bore under-pressure glass blasting joint

Abstract

The utility model relates to the field of gas lift drainage of under-pressure operation, in particular to a full-bore under-pressure glass blasting connector. The joint comprises an upper joint (1) and a lower joint (10), the upper joint (1) and the lower joint (10) respectively comprise a step surface used for being connected with the outer cylinder (2); the lower end of the upper joint (1) is connected with a glass blasting seat (4) through a shear pin (3); a glass explosion slide (7) is arranged on the glass explosion seat (4); the glass explosion slide (7) is in airtight connection with the glass explosion seat (4); a crushing head (11) is arranged at the upper end of the lower joint (10); and when the shear pin (3) is broken, the glass explosion seat (4) moves towards the lower joint (10). The pressure-bearing performance is guaranteed in the process of under-pressure well entering, when the full bore is needed, the upper portion provides pumping pressure to shear off the shear pin sealing sliding sleeve mechanism, the sliding sleeve mechanism descends to crush the glass blasting piece, and the full bore of the tubular column is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of with pressure operation gas lift drainage, especially relates to a full gauge with pressure glass joint. BACKGROUND

[0002] China's natural gas resources are abundant, however its gas reservoir has unique geological characteristics, and most of them belong to closed elastic water drive gas reservoir. This type of gas reservoir has certain sealing property in formation structure, and its driving energy mainly comes from elastic water drive. In the development process of gas reservoir, a common phenomenon is that different gas reservoirs will produce formation water to different degrees. The existence of formation water is an important factor that cannot be ignored in the development process of gas reservoir.

[0003] The production of formation water brings many negative effects to gas field development. When formation water enters the gas well, it will interfere with the flow of gas. It occupies a certain space in the wellbore, increases the resistance of gas flow, and makes it difficult to produce gas. This leads to the gas field entering the decline stage prematurely when the recovery degree is still low. The so-called low recovery degree means that the actual amount of natural gas produced by the gas field accounts for a relatively low proportion of the total reserves. More seriously, the influx of a large amount of formation water may cause water flooding of the gas well, resulting in abnormal production of the gas well, and eventually having to shut down. The shutdown of the water-flooded gas well will not only cause short-term production loss, but also have a significant impact on the ultimate recovery of the gas field. The ultimate recovery is a key indicator to measure the development effect of the gas field, which reflects the proportion of the amount of natural gas that can be produced in the entire development cycle to the total reserves. Therefore, how to effectively drain water and improve the recovery of watered gas reservoir has become one of the important issues that the oil and gas industry has been committed to research and solve for a long time.

[0004] In order to solve the problem of watered gas reservoir drainage, many drainage and gas recovery technologies have been developed and applied at home and abroad. The commonly used technologies mainly include optimized string drainage and gas recovery, foam drainage and gas recovery, plunger gas lift drainage and gas recovery, and gas lift drainage and gas recovery. The optimized string drainage and gas recovery technology is to optimize the size and material of the gas well string to improve the flow conditions of gas and liquid, so as to achieve the purpose of drainage and gas recovery. Foam drainage and gas recovery is to inject foam agent into the gas well, and the foam agent and formation water form foam after mixing, which reduces the surface tension of the liquid and makes it easier for the liquid to be carried out of the wellbore by the gas. The plunger gas lift drainage and gas recovery is to use the up and down movement of the plunger in the wellbore to lift the formation water to the ground. The gas lift drainage and gas recovery is to inject high-pressure gas into the gas well to drain the formation water out of the wellbore. These technologies have their own characteristics and application scope, and their selection mainly depends on the geological characteristics of the gas reservoir, such as formation pressure, permeability, etc.; the production state of the watered gas well, including the gas well yield, pressure change, etc.; and the economic investment, such as equipment cost, operation cost, etc.

[0005] However, the existing drainage gas recovery process also has some problems in practical application. Taking the existing gas lift drainage string as an example, during the under-pressure construction process, when the break disc connected opens, the string cannot realize full bore. Full bore refers to the internal passage of the string having a consistent diameter, which can ensure smooth flow of fluid. Due to the inability to realize full bore, the flow resistance inside the string increases, affecting the normal flow of gas and liquid. In order to ensure the normal production yield of the gas production well, subsequent measures are often taken. However, due to the limitation of the string bore, other measures such as plunger gas lift cannot be taken, which limits the flexibility and effectiveness of the drainage gas recovery process and brings certain difficulties to the development of the gas field.

[0006] On April 1, 2025, a search was conducted in the China Patent Publication Database with "glass and shear pin and drainage gas recovery and natural gas and sliding and thread and sealing ring" as the abstract keywords, with the synonym expansion option checked, and no relevant literature was found.

[0007] Three articles were found, which are completely unrelated to this patent.

[0008] , and this patent.

[0009] On April 1, 2025, an abstract search was conducted on China National Knowledge Infrastructure with "glass and shear pin and drainage gas recovery and natural gas and sliding and thread and sealing ring", and no relevant literature was found.

[0010] On April 1, 2025, a search was conducted on the United States Patent and Trademark Office website with "Glass with shear pin with drainage gas recovery with natural gas with sliding with thread with sealing ring", and no relevant literature was found; the search website is https: / / ppubs.uspto.gov / pubwebapp / .

[0011] On April 1, 2025, a search was conducted on WIPO's https: / / patentscope2.wipo.int / with "Glass and shear pin and drainage gas recovery and natural gas and sliding and thread and sealing ring", and no relevant literature was found.

[0012] No relevant document was found by searching on the website of Japan Patent Office (https: / / www.j-platpat.inpit.go.jp / ) on April 1, 2025 with the keywords of "Glass and shear pin and drainage gas recovery and natural gas and sliding and thread and sealing ring".

[0013] The present patent is completely different from the above patent. Content of the utility model

[0014] The utility model discloses a full-bore pressure burst glass joint, which has better effect, and specific purposes are shown in multiple substantial technical effects in the specific implementation part.

[0015] In order to achieve the above purposes, the utility model adopts the following technical solutions:

[0016] A full-bore pressure burst glass joint is characterized in that,

[0017] The joint comprises an upper joint 1 and a lower joint 10.

[0018] The upper joint 1 and the lower joint 10 each comprise a stepped surface for connecting with an outer cylinder 2.

[0019] The lower end of the upper joint 1 is connected with a burst glass seat 4 through a shear pin 3.

[0020] The burst glass seat 4 is arranged with a burst glass sheet 7.

[0021] The burst glass sheet 7 is in airtight connection with the burst glass seat 4.

[0022] A crushing head 11 is arranged on the upper end of the lower joint 10.

[0023] When the shear pin 3 is broken, the burst glass seat 4 moves towards the lower joint 10.

[0024] The further technical solution of the utility model is that the crushing head 11 is sawtooth-shaped.

[0025] The further technical solution of the utility model is that a plurality of threaded holes are arranged on the right side of the upper joint 1 in the same circle, and a sealing groove is arranged on the right side of the upper joint 1 for mounting an O-shaped sealing ring 2; the upper joint 1 is provided with threads matched with the outer cylinder.

[0026] A standard thread for connecting with an oil pipe is arranged on the left side of the upper joint 1.

[0027] The plurality of threaded holes are mounted with the shear pin 3.

[0028] The further technical scheme of the utility model lies in that the outer cylinder 2 is same in thread at both ends, and the inner cavity surface is a sealing surface.

[0029] The left end of the burst glass seat 4 is provided with a groove for fixing and limiting the shear pin 3, the inside of the burst glass seat 4 is provided with a sealing groove for mounting an O-shaped sealing ring 1, and the right end is provided with a threaded hole for mounting a screw 6; the burst glass seat 4 is connected with the fixing sleeve 9 through the screw 6 and the thread 12; the left end of the fixing sleeve 9 is provided with a boss for mounting the O-shaped sealing ring 1, the outer surface of the fixing sleeve 9 is provided with a sealing groove for mounting an O-shaped sealing ring 2, and the inner hole of the fixing sleeve 9 is provided with a step which is limited by the step of the left end of the lower joint 10 after sliding.

[0030] The further technical scheme of the utility model lies in that the burst glass sheet 7 is a high-pressure glass sheet, and the high-pressure glass sheet comprises different fragile grades.

[0031] The further technical scheme of the utility model lies in that the lower joint 10 is provided with a sealing groove and a connecting thread for sealing with the outer cylinder, and the right end of the lower joint 10 is provided with a standard thread for connecting with an oil pipe.

[0032] The further technical scheme of the utility model lies in that the burst glass sheet 7, the burst glass seat 4 and the fixing sleeve 9 form a sealing sliding mechanism, and the sealing sliding mechanism is provided with air tightness between the O-shaped sealing ring 1, the O-shaped sealing ring 2 and the outer cylinder 2.

[0033] The further technical scheme of the utility model lies in that the sealing sliding mechanism only needs to be fixed and positioned by the shear pin 3 through the thread hole of the upper joint 1 and the groove of the burst glass seat 4.

[0034] The further technical scheme of the utility model lies in that the shear pin 3 is a pin which is easy to break.

[0035] The utility model has the beneficial effects that compared with the prior art, the burst glass sheet is fixed at the designed position by arranging the burst glass seat, the O-shaped sealing ring, the fixing sleeve and the screw, the whole sealing sliding mechanism is fixed on the right end of the upper joint by the shear pin, the same size O-shaped sealing ring is arranged in the recess of the upper joint, the burst glass seat and the fixing sleeve, and is screwed into the thread of the outer cylinder for fastening; the O-shaped sealing ring is arranged in the recess of the lower joint, and is screwed into the thread of the other end of the outer cylinder for fastening, the pressure bearing performance is ensured during the process of being pressed into the well, the upper part provides pump pressure for shearing the shear pin when the full bore diameter is needed, the sealing sliding sleeve mechanism is lowered to break the burst glass sheet, and the full bore diameter of the pipe column is formed. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to further illustrate the utility model, the following further illustrates the utility model in conjunction with the drawings:

[0037] Fig. 1 It is a structural schematic view of the utility model;

[0038] Fig. 2 is a cross-sectional view of the burst disc after being broken;

[0039] Fig. 3 is a cross-sectional view of the utility model;

[0040] Fig. 4 is a three-dimensional view of the upper joint of the utility model;

[0041] Fig. 5 is a three-dimensional view of the lower joint of the utility model;

[0042] Fig. 6 is a schematic view of the partial structure of the utility model;

[0043] In the figure: 1, upper joint; 2, outer cylinder; 3, shear pin; 4, burst disc seat; 5, O-shaped sealing ring one; 6, screw; 7, burst disc; 8, O-shaped sealing ring two; 9, fixed sleeve; 10, lower joint; 11. Broken head; 12. Thread. DETAILED DESCRIPTION

[0044] The utility model will be further illustrated in conjunction with the drawings and specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the utility model and not used to limit the scope of the utility model. In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom" and the like is the orientation or position relationship shown in the drawings, and is only used to facilitate the description of the utility model and simplify the description, and cannot be understood as a limitation on the utility model. In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements inside. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] It is to be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0046] The present patent provides a plurality of parallel schemes, different expressions belong to improved schemes or parallel schemes based on the basic scheme. Each scheme has its own unique characteristics. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them. The fixing mode not expressed in the text can be any one of the fixing modes such as screw fixing, bolt fixing or glue bonding.

[0047] Embodiment one: in combination with all the drawings; a full-bore pressure burst glass joint, characterized in that,

[0048] The joint comprises an upper joint 1 and a lower joint 10;

[0049] The upper joint 1 and the lower joint 10 each comprise a stepped surface for connecting with the outer cylinder 2;

[0050] The lower end of the upper joint 1 is connected with the burst glass seat 4 through the shear pin 3;

[0051] A burst glass sheet 7 is arranged on the burst glass seat 4;

[0052] The burst glass sheet 7 and the burst glass seat 4 are airtight connected;

[0053] A crushing head 11 is arranged on the upper end of the lower joint 10;

[0054] When the shear pin 3 breaks, the burst glass seat 4 will move towards the lower joint 10.

[0055] The essential technical effect of the technical scheme and its implementation process, i.e. the basic function, are as follows:

[0056] When there is no pressure, the whole is closed, when the left side is pressurized, the burst glass seat 4 will move towards the lower joint 10, the burst glass sheet 7 will be broken, and the channel will be opened.

[0057] Embodiment two: as a further improved scheme or parallel scheme or alternative independent scheme, the crushing head 11 is serrated. The serrated shape is a sharp top structure, which is convenient for hitting glass.

[0058] The right side of the upper joint 1 is provided with a plurality of threaded holes, and the right side of the upper joint 1 is provided with a sealing groove for mounting an O-shaped sealing ring 8; the upper joint 1 is provided with threads matched with the outer cylinder;

[0059] The left side of the upper joint 1 is provided with standard threads connected with the oil pipe;

[0060] The plurality of threaded holes are mounted with shear pins 3. The substantial technical effects and implementation process of the technical solution and the basic functions are as follows:

[0061] Please refer to Figs. 1-4 In the embodiment of the utility model, the right side of the upper joint 1 is provided with a plurality of threaded holes, a sealing groove is mounted with an O-shaped sealing ring 8 and threads matched with the outer cylinder, the left side is provided with standard threads connected with the oil pipe; a plurality of threaded holes are mounted with shear pins 3; the threads of the outer cylinder 2 at both ends are same, and the inner cavity surface is a sealing surface; the left end of the burst glass seat 4 is provided with a groove fixedly limiting the shear pin 3, the inside is provided with a sealing groove mounting an O-shaped sealing ring 1 5, and the right end is provided with a threaded hole for mounting a screw 6; the burst glass sheet 7 is a high-pressure glass sheet, and different grades can be selected according to customer requirements; the left end of the fixing sleeve 9 is provided with a boss for mounting the O-shaped sealing ring 1 5, the threads are connected with the burst glass seat 4, the outer surface is provided with a sealing groove, and the inner hole is provided with a step sliding and limiting the left end step of the lower joint 10;

[0062] The left end of the lower joint 10 is provided with a plurality of sharp spikes, i.e. sawtooth structures, and the right end is provided with standard threads connected with the oil pipe.

[0063] In the embodiment, first, the O-shaped sealing ring 1 5 is mounted in the sealing groove in the burst glass seat 4, and then the burst glass sheet 7 is mounted

[0064] The boss of the fixing sleeve 9 is mounted with the O-shaped sealing ring 1 5, the threads of the burst glass seat 4 are screwed to be connected, and the screw 6 is fixed at the designed position to form a sealing sliding mechanism; the sealing sliding mechanism is fixed and positioned by the shear pin 3 through the threaded hole of the upper joint 1 and the groove of the burst glass seat 4; the O-shaped sealing ring 8 is mounted in the corresponding sealing grooves of the upper joint 1, the burst glass seat 4 and the fixing sleeve 9, and is screwed into the threads of the outer cylinder 2 to be fastened; the O-shaped sealing ring 2 8 is mounted in the groove of the lower joint 10, and is screwed into the threads of the outer cylinder 2 from the other end to be fastened. In the process of being pressed into the well, the pressure-bearing performance is ensured, when the full bore is required, the upper part provides pump pressure to cut the shear pin, the sealing sliding sleeve mechanism is lowered to break the burst glass sheet, and the full bore of the pipe column is formed.

[0065] In the embodiment, the threads of the outer cylinder 2 at both ends are same, and the inner cavity surface is a sealing surface;

[0066] The left end of the glass breaking seat 4 is provided with a groove for fixing and limiting the shear pin 3, the inside of the glass breaking seat 4 is provided with a sealing groove for installing the O-shaped sealing ring 1, and the right end is provided with a threaded hole for installing the screw 6; the glass breaking seat 4 is connected with the fixing sleeve 9 through the screw 6 and the thread 12; the left end of the fixing sleeve 9 is provided with a boss for installing the O-shaped sealing ring 1, the outer surface of the fixing sleeve 9 is provided with a sealing groove for installing the O-shaped sealing ring 2, and the inner hole of the fixing sleeve 9 is provided with a step which is limited by the step of the left end of the lower joint 10 after sliding. The essential technical effect and the implementation process of the technical scheme are as follows: the overall positioning is more accurate.

[0067] Embodiment five: as a further improved scheme or parallel scheme or alternative independent scheme, the glass breaking disc 7 is a high-pressure glass disc, and the high-pressure glass disc comprises different fragile levels. The essential technical effect and the implementation process of the technical scheme are as follows: a series of high-pressure glass discs can be provided according to the needs of customers.

[0068] Embodiment six: as a further improved scheme or parallel scheme or alternative independent scheme, the lower joint 10 is provided with a sealing groove and a connecting thread for sealing with the outer cylinder, and the right end of the lower joint 10 is provided with a standard thread for connecting with the oil pipe.

[0069] Embodiment seven: as a further improved scheme or parallel scheme or alternative independent scheme, the glass breaking disc 7, the glass breaking seat 4 and the fixing sleeve 9 constitute a sealing sliding mechanism, and the sealing sliding mechanism is provided with air tightness between the O-shaped sealing ring 1, the O-shaped sealing ring 2 and the outer cylinder 2. The sealing sliding mechanism only needs to be fixed and positioned by the shear pin 3 through the thread hole of the upper joint 1 and the groove of the glass breaking seat 4.

[0070] The shear pin 3 is a pin which is easy to break.

[0071] The problem that the full diameter of the pipe string cannot be realized after the rupture disc is opened when the existing gas lift drainage pipe string is connected in the pressure construction is solved, the normal production yield of the gas production well is ensured, subsequent measures such as the plunger gas lift can be taken, and the construction demand of the gas lift plunger integrated pipe string is met.

[0072] Independently, the above effects can also be combined by using one structure to achieve the above results.

[0073] It should be noted that the multiple schemes provided by the patent comprise a basic scheme, are independent of each other and do not restrict each other, but they can also be combined without conflict to achieve multiple effects.

[0074] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed application.

Claims

1. A full-gauge pressure-burst joint, characterized in that, the joint comprises an upper joint (1) and a lower joint (10); the upper joint (1) and the lower joint (10) each comprise a stepped surface for connecting with an outer cylinder (2); the lower end of the upper joint (1) is connected with a burst seat (4) through a shear pin (3); the burst seat (4) is provided with a burst disc (7); the burst disc (7) and the burst seat (4) are in airtight connection; a crushing head (11) is arranged at the upper end of the lower joint (10); when the shear pin (3) is broken, the burst seat (4) moves towards the lower joint (10).

2. A pressure-containing, zero- or reduced-drift, burst joint as in claim 1, wherein, The crushing head (11) is sawtooth-shaped.

3. The full-gauge pressure-burst joint according to claim 1, characterized in that, a plurality of threaded holes are arranged on the right side of the upper joint (1) in the same circle, and a sealing groove is arranged on the right side of the upper joint (1) for installing an O-shaped sealing ring (8); the upper joint (1) is provided with threads matched with the outer cylinder; a standard thread for connecting with a tubing is arranged on the left side of the upper joint (1); the plurality of threaded holes are provided with the shear pin (3).

4. The full-gauge pressure-burst joint according to claim 1, characterized in that, the outer cylinder (2) has the same threads at both ends, and the inner cavity surface is a sealing surface; a groove for fixing and limiting the shear pin (3) is arranged at the left end of the burst seat (4), a sealing groove for installing an O-shaped sealing ring (5) is arranged inside the burst seat (4), a threaded hole for installing a screw (6) is arranged at the right end of the burst seat (4); the burst seat (4) is connected with a fixing sleeve (9) through the screw (6) and threads (12); a boss for installing the O-shaped sealing ring (5) is arranged at the left end of the fixing sleeve (9), a sealing groove for installing an O-shaped sealing ring (8) is arranged on the outer surface of the fixing sleeve (9), and a stepped hole is arranged in the fixing sleeve (9), which is limited by the stepped surface at the left end of the lower joint (10) after sliding.

5. The full-gauge pressure-burst joint according to claim 1, characterized in that, the burst disc (7) is a high-pressure glass disc, and the high-pressure glass disc comprises different breakable grades.

6. The full-gauge pressure-burst joint according to claim 1, characterized in that, the lower joint (10) is provided with a sealing groove and connecting threads for sealing with the outer cylinder, and a standard thread for connecting with a tubing is arranged at the right end of the lower joint (10).

7. The full-gauge pressure-burst joint according to claim 5, characterized in that, the burst disc (7), the burst seat (4), and the fixing sleeve (9) constitute a sealing sliding mechanism, which is arranged in airtight connection between the O-shaped sealing ring (5), the O-shaped sealing ring (8), and the outer cylinder (2).

8. A full-bore explosion-proof glass connector as described in claim 7, characterized in that, the sealing sliding mechanism is fixed and positioned by the shear pin (3) through the threaded hole of the upper joint (1) and the groove of the burst seat (4).

9. A pressure-containing, zero- or reduced-drift, burst joint as in claim 1, wherein, The shear pin (3) is a pin that is easy to break.

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