Multi-stage seal pressure testing device

Abstract

The utility model provides a kind of multistage sealing pressure testing device, including the pressure testing body of cylindrical form, the pressure testing mechanism being arranged in the pressure testing body, the pressure testing mechanism includes first blind plate, the second blind plate being arranged in the below of first blind plate, and the sealing joint being arranged between first blind plate and second blind plate, wherein, sealing element for forming sealed connection with the pressure testing body is sheathed in the sealing joint, several press mouths are equipped on the lateral wall of the pressure testing body, the pressure testing mechanism further includes detection piece for judging the state of sealing element, and one press mouth is connected to inject pressure by pressure testing pipeline, and the sealing condition of sealing element is verified by the press mouth being connected to both sides by detection piece.

Description

Technical Field

[0001] This utility model relates to the field of downhole tool sealing technology, and specifically to a multi-stage sealing pressure testing device. Background Technology

[0002] Currently, downhole tool seals play a crucial role in underground operations such as oil and gas wells and mines. They are widely used in drilling, cementing, well completion, oil production, and gas production processes to ensure the sealing performance of equipment and tools, prevent leakage of liquids, gases, or other substances, and ensure a safe and efficient working environment. As the depth of drilling increases, the accompanying temperature and pressure also gradually rise, making the high-temperature resistance and high-pressure bearing capacity of seals key factors restricting the reliability of downhole tools.

[0003] However, complex equipment or tools often contain multiple sealing rings made of different materials (such as rubber, metal, and polymer rings), as well as many different types of sealing rings (such as O-rings, D-rings, and V-rings), and many different specifications. These sealing rings are often located in different parts of the equipment or tool, and the working environment and sealing requirements of each type of sealing ring may also differ. Traditional sealing ring pressure testing methods are usually quite cumbersome, generally testing each sealing ring individually and checking for leaks one by one. This often requires a lot of manual operation and time, resulting in low efficiency, and it is impossible to efficiently monitor and control multiple sealing rings simultaneously during the test.

[0004] Therefore, in view of this situation, there is a need in the art to provide a multi-stage sealing pressure testing device to improve testing efficiency, while also being able to comprehensively monitor the sealing performance of various sealing rings under different pressure conditions, thus having significant advantages in work efficiency and quality control. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage sealing pressure testing device that can simultaneously test multiple sealing rings of different specifications. In other words, the sealing surface of this invention can be machined into different sizes according to the outer diameter of the sealing ring to meet the testing requirements of sealing rings of different specifications, thereby further improving testing efficiency.

[0006] According to this utility model, a multi-stage sealing pressure testing device is provided, comprising a cylindrical pressure testing body.

[0007] The pressure testing mechanism is disposed within the pressure testing body. The pressure testing mechanism includes a first blind plate, a second blind plate disposed below the first blind plate, and a sealing joint disposed between the first blind plate and the second blind plate.

[0008] The sealing joint is fitted with a sealing element for forming a sealed connection with the pressure testing body. Several pressure nozzles are provided on the side wall of the pressure testing body. The pressure testing mechanism also includes a detection element for determining the condition of the sealing element.

[0009] Pressure is injected by connecting a pressure test line to one of the pressure nozzles, and the sealing condition of the seal is verified by connecting the test element to the pressure nozzles located on both sides.

[0010] In one embodiment, the number of pressure nozzles is greater than the number of sealing joints.

[0011] In one embodiment, a radially outwardly extending boss is provided on the inner wall of the sealing joint. The pressure testing mechanism further includes an end ring that is sleeved on the outside of the sealing joint and causes the seal to abut against the boss.

[0012] In one embodiment, a plurality of spaced sealing surfaces are provided on the inner wall of the test pressure body, and the sealing surfaces can be machined into different sizes according to the outer diameter of the seal.

[0013] In one embodiment, the seal is constructed as a sealing ring.

[0014] In one embodiment, the seal consists of a sealing ring and retaining rings nested at both ends of the sealing ring.

[0015] In one embodiment, the sealing ring is made of any of the following materials: rubber, metal, or polymer.

[0016] In one embodiment, a step extending radially inward is provided at the bottom of the sealing joint, and a limiting boss for abutting against the step is provided on the inner wall of the pressure testing body.

[0017] In one embodiment, the pressure testing mechanism further includes a top rod disposed between the sealing joint and the second blind plate.

[0018] In one embodiment, the detection element includes any one of a pressure sensor, a gas detection tool, and an ultrasonic detection tool.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] Firstly, this invention can simultaneously test multiple sealing rings of different specifications. In other words, the sealing surface of this invention can be processed into different sizes according to the outer diameter of the sealing ring, thereby meeting the testing requirements of sealing rings of different specifications and further improving testing efficiency.

[0021] Secondly, this invention can pre-install several sealing joints and sealing elements within the pressure testing body. This allows for simultaneous testing of two sealing elements after a single pressure injection, and also enables testing of the next set of sealing elements without disassembly and reassembly. Therefore, compared to existing technologies, this invention effectively avoids the cumbersome steps of repeated disassembly and assembly in traditional single-test methods, significantly saving time and further improving testing efficiency. Furthermore, the detection component allows for real-time monitoring of multiple parameters, thus enabling more accurate testing of the sealing performance of each sealing ring. Attached Figure Description

[0022] The present invention will now be described in detail with reference to the accompanying drawings, in which:

[0023] Figure 1 The schematic diagram illustrates the structure of the multi-stage sealing pressure testing device according to the present invention;

[0024] Figure 2 This is one embodiment of the multi-stage sealing pressure testing device according to the present invention;

[0025] Figure 3 This is one embodiment of the multi-stage sealing pressure testing device according to the present invention.

[0026] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0027] To make the technical solution and advantages of this utility model clearer, the exemplary embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0030] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 The schematic diagram shows the structure of the multi-stage sealing pressure testing device 100 according to the present invention.

[0033] like Figure 1 As shown, according to a first aspect of the present invention, the multi-stage sealing pressure testing device 100 mainly includes a cylindrical pressure testing body 10 and a pressure testing mechanism disposed within the pressure testing body 10. Preferably, the pressure testing mechanism includes a first blind plate 11, a second blind plate 12 disposed below the first blind plate 11, and a sealing joint disposed between the first blind plate 11 and the second blind plate 12. Preferably, the operation process differs depending on whether there is one sealing joint or multiple sealing joints, as will be described in detail below.

[0034] In this invention, the outer peripheral surfaces of the first blind plate 11 and the second blind plate 12 form a sealed connection with the inner peripheral surface of the pressure testing body 10, thereby providing a favorable sealed space for the pressure testing operation. Furthermore, the sealing joints are movably connected to the pressure testing body 10; in other words, after the first blind plate 11 is fixed, the required number of sealing joints can be inserted into the pressure testing body 10. Preferably, adjacent sealing joints abut against each other axially.

[0035] In one embodiment of this utility model, a sealing element is provided on the outer sleeve of the sealing joint. Preferably, the outer peripheral surface of the sealing element can form a sealed connection with the inner peripheral surface of the pressure test body 10. Therefore, during the pressure test, the sealing performance of the sealing element can be further judged by injecting pressure to test whether there is leakage between the sealing element, the pressure test body 10, and the sealing joint.

[0036] In one embodiment, a plurality of pressure nozzles are provided on the side wall of the pressure testing body 10. Preferably, the total number of pressure nozzles is greater than the total number of sealing joints.

[0037] In one embodiment of this utility model, such as Figure 1 As shown, a radially outwardly extending boss 131 is provided on the inner wall of the sealing joint. The pressure testing mechanism also includes an end ring 14 sleeved on the outside of the sealing joint. Preferably, the end ring 14 and the boss 131 are arranged at intervals, and the sealing element is located between the end ring 14 and the boss 131. In this invention, the end ring 14 can facilitate axial contact between the sealing element and the boss 131, effectively limiting the position of the sealing element on the sealing joint, thereby improving the stability and authenticity of subsequent pressure testing.

[0038] In this invention, a plurality of spaced sealing surfaces 132 are provided on the inner wall of the pressure test body 10. Preferably, during the sealing test, each sealing surface 132 corresponds to a sealing element, thereby enabling the sealing joint to form a good sealing effect with the pressure test body 10 through the sealing contact between the sealing element and the sealing surface 132. It is worth noting that the sealing surface 132 can be machined into different sizes according to the outer diameter of the sealing element.

[0039] Preferably, such as Figure 1 As shown, a step 133 extending radially inward is provided at the bottom of the sealing joint, and a limiting boss 101 is provided on the inner wall of the test body 10. Therefore, after assembly, the last sealing joint can abut against the limiting boss 101 of the test body 10 through the step 133, thereby making it easier to restrict the axial position of multiple sealing joints within the test body 10.

[0040] Figure 3 This is one embodiment of the multi-stage sealing pressure testing device according to the present invention.

[0041] In one embodiment, such as Figure 3 In the illustrated embodiment, the pressing mechanism further includes a push rod 16 disposed between the sealing joint and the second blind plate 12. In this invention, the push rod 16 can axially abut against the bottom of the sealing joint, so that the top of the sealing joint can more easily fit tightly against the first blind plate 11, thereby helping to improve the accuracy and stability of the testing work.

[0042] In this invention, the sealing element can be configured in two types: first, the sealing element is simply a sealing ring 20; second, the sealing element consists of a sealing ring 20 and retaining rings 15 nested at both ends of the sealing ring 20. Preferably, the retaining rings 15 can effectively limit the sealing ring 20, which is beneficial to the stability of the sealing ring 20 during pressure testing. It is worth noting that the retaining rings 15 can also play a certain sealing role.

[0043] In this invention, the sealing ring 20 can be of different types, such as rubber sealing rings, metal sealing rings, and polymer sealing rings. If it is a rubber sealing ring, different materials can be selected, such as nitrile rubber sealing rings, hydrogenated nitrile rubber sealing rings, fluororubber sealing rings, and AFLAS sealing rings. Furthermore, the shape of the sealing ring 20 can also be varied, such as O-rings, D-rings, V-rings, Y-rings, and W-rings.

[0044] Preferably, since different sealing rings 20 are installed in different positions on tools or equipment, and different working environments and sealing requirements may also be different, the sealing rings 20 will have many different specifications. Therefore, in this utility model, the sealing surface 132 can be processed into different sizes according to the outer diameter of the sealing ring 20 (the outer diameter of the sealing ring 20 is usually larger than the outer diameter of the retaining ring 15), so as to ensure that sealing rings 20 of different specifications can be tested at the same time, thereby further improving testing efficiency.

[0045] Preferably, this device can also employ a multi-channel pressure control system, which uses multiple independent valves to control the pressure of each sealing ring, i.e., each independent valve controls the pressure of each sealing ring.

[0046] In one embodiment, the pressure testing mechanism further includes a detection element for determining the condition of the seal. The detection element can be a differential pressure sensor. Each pressure nozzle is connected to a detection element via a pipeline, thereby enabling real-time control and monitoring of the pressure of each seal. Preferably, after pressure is injected, the differential pressure sensor can monitor pressure changes and leakage conditions of each seal. Therefore, if a seal leaks, the differential pressure sensor will immediately alarm and record the location of the leak, at which point a pressure drop will appear on the pressure test curve.

[0047] In other embodiments, the detection device can also be a gas detection tool or an ultrasonic detector. Similarly, it is connected to each pressure nozzle via a pipeline to verify the sealing condition of the seal. Preferably, the gas detection tool is, for example, a beaker filled with water. One end of the connecting tube is connected to the pressure nozzle, and the other end is inserted into the beaker. If there is a leak, bubbles will be generated in the beaker, which proves that the seal is damaged.

[0048] Preferably, during the pressure test, the test data (such as applied pressure, temperature, leakage, etc.) of each seal can be recorded in real time by the intelligent control system and data recording unit. The system can then automatically analyze the results and generate a report to ensure that the performance of each seal meets the standards.

[0049] In this invention, if a high-temperature sealing test is required, the multi-stage sealing pressure test device 100 can be connected to a heating belt or placed in a high-temperature and high-pressure well, heated to the corresponding temperature, and then pressurized to verify the sealing performance of the sealing component.

[0050] by Figure 1 For example, five pressure nozzles are provided (i.e., 211, 212, 213, 214, 215), four sealing joints are provided (i.e., 221, 222, 223, 224), and four sealing elements are provided (i.e., 231, 232, 233, 234). The following is a combination of... Figure 1This section describes the specific process of pressure testing under four seals.

[0051] First, pressure is injected by connecting the pressure test line to the pressure nozzle 212. Then, the test piece is connected to the pressure nozzles 211 and 213 located on both sides to test whether there is leakage between the seal and the test body 10 and the sealing joint, thereby verifying the sealing performance of the seal.

[0052] Preferably, during this step, the sealing performance of the seals 231 and 232 installed on the sealing joints 221 and 222 can be tested simultaneously.

[0053] Then, pressure is injected by connecting the pressure test line to the pressure nozzle 214, and the test piece is connected to the pressure nozzles 213 and 215 located on both sides to test whether there is leakage between the seal and the test body 10 and the sealing joint, thereby verifying the sealing performance of the seal.

[0054] Preferably, during this step, the sealing performance of the seals 233 and 234 installed on the sealing joints 223 and 224 can be tested simultaneously.

[0055] It is worth noting that, in order to improve testing efficiency, the number of sealing joints filled each time should be an even number if possible.

[0056] This invention can pre-install several sealing joints and sealing elements within the pressure testing body 10. This allows for simultaneous testing of two sealing elements after a single pressure injection, and also enables testing of the next set of sealing elements without disassembly and reassembly. Therefore, compared to existing technologies, this invention effectively avoids the cumbersome steps of repeated disassembly and assembly in traditional single-test methods, thus significantly saving time and further improving testing efficiency.

[0057] Preferably, if a high-temperature sealing test is required, the multi-stage sealing pressure testing device 100 can be connected to a heating belt or placed in a high-temperature and high-pressure well, heated to the corresponding temperature, and then pressurized to verify the sealing performance of the sealing components.

[0058] by Figure 2 For example, four pressure nozzles are provided (i.e., 311, 312, 313, 314), three sealing joints are provided (i.e., 321, 322, 323), and three sealing elements are provided (i.e., 331, 332, 333). The following section will discuss these in conjunction with... Figure 2 This section describes the specific process of pressure testing under three seals.

[0059] First, pressure is injected by connecting the pressure test line to the pressure nozzle 312. Then, the test piece is connected to the pressure nozzles 311 and 313 on both sides to test whether there is leakage between the seal and the test body 10 and the sealing joint, thereby verifying the sealing performance of the seal.

[0060] Preferably, during this step, the sealing performance of the seals 331 and 332 installed on the sealing joints 321 and 322 can be tested simultaneously.

[0061] Then, pressure is injected by connecting the pressure test line to the pressure nozzle 313, and the test piece is connected to the pressure nozzle 314 to test whether there is leakage between the seal and the test body 10 and the sealing joint, thereby verifying the sealing performance of the seal.

[0062] Preferably, in this step, the sealing performance of the seal 333 installed on the sealing joint 323 can be tested. Preferably, if a high-temperature sealing test is required, the multi-stage sealing pressure testing device 100 can be connected to a heating belt or placed in a high-temperature and high-pressure well, heated to the corresponding temperature, and then pressurized to verify the sealing performance of the seal.

[0063] In other embodiments, this device can also test a seal individually. Figure 3 For example, three pressure nozzles are provided (i.e., 411, 412, and 413), one sealing joint is provided (i.e., 421), and one sealing element is provided (i.e., 431). The following is a combination of... Figure 1 This section describes the specific process of pressure testing under a seal.

[0064] Pressure is injected by connecting the pressure test line to the pressure nozzle 411, and the test piece is connected to the pressure nozzle 412 to test whether there is leakage between the seal and the test body 10 and the sealing joint, thereby verifying the sealing performance of the seal. In this embodiment, the seal 431 installed on the sealing joint 421 can be tested separately. It is worth noting that in this embodiment, the sealing joint 421 needs to form an axial abutment with the first blind plate 11 through the push rod 16.

[0065] Preferably, if a high-temperature sealing test is required, the multi-stage sealing pressure testing device 100 can be connected to a heating belt or placed in a high-temperature and high-pressure well, heated to the corresponding temperature, and then pressurized to verify the sealing performance of the sealing components.

[0066] Compared with existing technologies, the advantages of this utility model are:

[0067] Firstly, this utility model can simultaneously test multiple sealing rings 20 of different specifications. In other words, the sealing surface 132 in this utility model can be processed into different sizes according to the outer diameter of the sealing ring 20, so as to meet the testing requirements of sealing rings 20 of different specifications and further improve the testing efficiency.

[0068] Secondly, this invention can pre-install several sealing joints and sealing elements within the pressure testing body 10. This allows for simultaneous testing of two sealing elements after a single pressure injection, and also enables testing of the next set of sealing elements without disassembly and reassembly. Therefore, compared to existing technologies, this invention effectively avoids the cumbersome steps of repeated disassembly and assembly in traditional single-test methods, thus significantly saving time and further improving testing efficiency. Furthermore, the detection element can monitor multiple parameters in real time, allowing for more accurate testing of the sealing performance of each sealing ring 20.

[0069] The above are merely preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of this utility model, and such changes or modifications should be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A multi-stage sealing pressure testing device, characterized in that, include: The test pressure body (10) is in the form of a cylindrical tube. The pressure testing mechanism is disposed within the pressure testing body (10), the pressure testing mechanism including a first blind plate (11), a second blind plate (12) disposed below the first blind plate (11), and a sealing joint disposed between the first blind plate (11) and the second blind plate (12). The sealing joint is fitted with a sealing element for forming a sealed connection with the test pressure body (10). Several pressure nozzles are provided on the side wall of the test pressure body (10). The test pressure mechanism also includes a detection element for determining the state of the sealing element. Pressure is injected by connecting a pressure test line to one of the pressure nozzles, and the sealing condition of the seal is verified by connecting the test element to the pressure nozzles located on both sides.

2. The multi-stage sealing pressure testing device according to claim 1, characterized in that, The number of pressure nozzles is greater than the number of sealing joints.

3. The multi-stage sealing pressure testing device according to claim 2, characterized in that, The inner wall of the sealing joint is provided with a radially outwardly extending boss (131), and the pressure testing mechanism also includes an end ring (14) that is sleeved on the outside of the sealing joint and causes the sealing element to abut against the boss (131).

4. The multi-stage sealing pressure testing device according to claim 3, characterized in that, Multiple sealing surfaces (132) are provided on the inner wall of the test body (10) at intervals. The sealing surfaces (132) can be processed into different sizes according to the outer diameter of the seal.

5. The multi-stage sealing pressure testing device according to claim 4, characterized in that, The sealing element is constructed as a sealing ring.

6. The multi-stage sealing pressure testing device according to claim 4, characterized in that, The sealing element consists of a sealing ring and retaining rings (15) nested at both ends of the sealing ring.

7. The multi-stage sealing pressure testing device according to claim 5 or 6, characterized in that, The sealing ring is made of any of the following materials: rubber, metal, or polymer.

8. The multi-stage sealing pressure testing device according to any one of claims 1 to 6, characterized in that, A step (133) extending radially inward is provided at the bottom of the sealing joint, and a limiting boss (101) for abutting against the step (133) is provided on the inner wall of the pressure test body (10).

9. The multi-stage sealing pressure testing device according to any one of claims 1 to 6, characterized in that, The pressure testing mechanism also includes a push rod (16) disposed between the sealing joint and the second blind plate (12).

10. The multi-stage sealing pressure testing device according to any one of claims 1 to 6, characterized in that, The detection device includes any one of a pressure sensor, a gas detection tool, and an ultrasonic detection tool.

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