Hydrostatic pressure testing device and method for casing head

Abstract

The invention provides a hydrostatic pressure testing device and method for a casing head. A hydrostatic pressure testing device for a casing head comprises a testing box, a testing assembly and at least one clamping assembly, the testing assembly is installed on the testing box, at least one testing area is arranged in the testing box, the clamping assembly is installed in the testing area, and liquid is arranged in the testing box. According to the device, hydrostatic pressure testing can be carried out on the casing head after the casing head is produced, the overall sealing effect of the casing head is tested, the situation that leakage is not known is prevented, meanwhile, the casing head is vertically clamped and fixed before testing, toppling during testing is prevented, and the overall effect and reliability of the casing head in follow-up actual use are improved.

Description

Technical Field

[0001] This invention relates to the field of casing head testing technology, and more particularly to a hydrostatic pressure testing device and method for casing heads. Background Technology

[0002] The casing head is one of the core components of the drilling wellhead equipment. It is mainly used to fix the wellhead structure and undertakes multiple functions. As a key hub connecting the downhole casing string and the surface equipment, it not only suspends the weight of each layer of casing except for the surface casing, but also prevents pressure from flowing between layers by sealing the annular space of the casing, thus ensuring well control safety. It is a special device used to verify the sealing integrity of the casing head in oil and gas drilling.

[0003] Existing patent CN115929286 discloses a sealing detection system and method for drilling casing, relating to the field of drilling engineering. The sealing detection system includes a coiled tubing, a packer assembly, a gas-liquid injection assembly, and a pressure detection device. This system has high detection accuracy; in addition to detecting leaks at the joints of casing segments, it can also detect leaks caused by defects in the casing itself, enabling comprehensive detection of casing sealing performance and avoiding misjudgments or omissions. Compared with existing current logging methods, it greatly improves the accuracy of casing sealing performance detection. This invention forms a closed annular cavity between the coiled tubing and the casing under test using upper and lower packers, and can fill the closed annular cavity with water and gas with the cooperation of the gas-liquid injection assembly. It can simulate the detection of casing sealing performance under high pressure conditions and is suitable for detecting all non-metallic and metallic segmented casings in wells. The principle of existing patent one is that a closed annular cavity is formed between the coiled tubing and the casing under test using upper and lower packers. This cavity can be filled with water and gas with the assistance of a gas-liquid injection assembly, simulating the testing of the casing's sealing performance under high-pressure conditions. This high-pressure condition is identical to the conditions under which the casing is operated in the well, reflecting its sealing performance under high-pressure conditions. However, existing patent one only tests and maintains a single coiled tubing in use, not during production. It does not require clamping components, and the test relies on the sealing of the upper and lower packers. Insufficient sealing of the packers can lead to low testing accuracy. It is not suitable for casing head testing, cannot perform hydrostatic pressure testing, and cannot effectively test the casing head's sealing performance, making it difficult to detect leaks in a timely manner.

[0004] Existing patent 2, CN110057503, discloses a test method for testing the performance of a bushing head, including the following steps: Step S1: Equipment connection, including connecting the bushing head to be tested to a tooling to form a test chamber, and connecting the tooling to a pressure generating device; Step S2: Injecting fluid into the test chamber, and stopping fluid injection when the pressure value in the test chamber reaches a first preset range; Step S3: Holding pressure for a first set time, judging whether the pressure is stable based on the pressure value change during the holding period, and if the pressure is stable, proceeding to Step S4; Step S4: Holding pressure for a second set time, judging whether the sealing performance of the bushing head meets the requirements based on the pressure value change during the holding period; Step S5: Depressurizing. Bushing heads with qualified sealing performance can be put into production use, ensuring the sealing performance of bushing heads produced in large quantities, effectively reducing the phenomenon of sealing failure during the use of bushing heads, and reducing losses. The principle of existing patent 2 is that after connecting the equipment, fluid is injected into the test chamber to conduct a sealing performance test, and bushing heads with qualified sealing performance can be put into production use. However, the existing patent 2 involves directly injecting liquid into the bushing head, which makes it difficult to detect minor leaks. It also lacks mention of clamping components, resulting in low detection accuracy and efficiency. Furthermore, it cannot perform hydrostatic testing, making it impossible to effectively test the bushing head's sealing performance, thus hindering timely detection of leaks.

[0005] Existing patent three, CN110836695, discloses a method for testing the airtightness of underground water-sealed caverns under multi-cavity conditions. The method involves first setting up a monitoring network; cleaning the caverns and plotting a capacity-depth curve; then verifying the capacity-depth curve and the permeability coefficient of the surrounding rock; during testing, sterile fresh water is injected first; then compressed air is injected into the caverns to be tested, while the remaining caverns that have not yet passed the test are kept at atmospheric pressure; after the air injection phase, the caverns to be tested successively enter a temperature stabilization phase and a pressure test phase. The absolute value of the gas pressure change during the pressure test phase is calculated. If the cavern passes the airtightness test, water is injected into the tested caverns to release the gas, and the released gas is injected into the next cavern to be tested for further testing. This invention, based on numerical simulation of the groundwater seepage field and on-site monitoring, overcomes the shortcomings of existing methods that cannot dynamically verify and adjust airtightness test parameters; it proposes a correct formula for correcting the relative gas pressure during the pressure test phase, ensuring the reliability of the airtightness test results. The principle of existing patent three is to propose specific values ​​for key variables at different stages during the airtightness test, such as the compressed air injection rate, the water level in the construction tunnel and shaft during injection, and the relative pressure of the gas in the cavern at the end of injection, thereby improving the safety of the test process and the accuracy of the test results. However, existing patent three is for the inspection and maintenance of underground water-sealed caverns in use, not for inspection during production. It does not require clamping components, and the inspection depends on whether the cavern is sealed. Insufficient sealing of the cavern can easily lead to low inspection accuracy. It is not suitable for casing head inspection, cannot perform hydrostatic pressure testing, and cannot effectively detect the sealing performance of the casing head, making it difficult to detect leakage problems in a timely manner.

[0006] In the existing technology, when the casing head is manufactured and subjected to hydrostatic pressure testing, its sealing performance cannot be effectively tested, making it difficult to detect leakage problems in a timely manner.

[0007] The aforementioned technologies have certain shortcomings in their application. After the sleeve head is manufactured, it needs to undergo hydrostatic pressure testing. The main purpose of this test is to detect its internal sealing performance to prevent leakage problems from going undetected. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a hydrostatic pressure testing device and method for casing heads, which addresses the shortcomings of the prior art.

[0009] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A hydrostatic pressure testing device for a sleeve head, comprising: a test box, a test component and at least one clamping component, wherein the test component is installed on the test box, the test box is provided with at least one test area, the clamping component is installed in the test area, and the test box is provided with liquid.

[0010] The beneficial effects of adopting the technical solution of the present invention are: after the casing head is produced, a hydrostatic pressure test can be performed on it to measure the overall sealing effect of the casing head, preventing the existence of leakage from going unnoticed. At the same time, the casing head is vertically clamped and fixed before the test to prevent it from tipping over during the test, thereby improving the overall effect and reliability of the casing head in subsequent actual use.

[0011] Furthermore, the test box is provided with a cavity, and there are multiple clamping components. A partition plate is installed in the cavity of the test box, which divides the cavity of the test box into multiple test areas, and the multiple clamping components are respectively installed in the multiple test areas.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are: the cavity design facilitates the containment of liquid, various components, and cannula heads. The partition plate design facilitates the division of the test chamber cavity into multiple test zones, enabling simultaneous testing of multiple cannula heads and improving testing efficiency. Furthermore, the partition plate design ensures that the presence or absence of air bubbles in each test zone does not interfere with each other, facilitating rapid identification of the airtightness of the cannula heads in each test zone.

[0013] Furthermore, the test box has an L-shaped structure; the partition plate has a cross-shaped structure.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The test chamber has an L-shaped structure, which facilitates the use of the hydrostatic testing device for the sleeve head, simplifies the structure, and reduces space occupancy. The partition plate has a cross-shaped structure, which facilitates the quick division of the test chamber cavity into multiple test areas, making operation easier and improving testing efficiency.

[0015] Furthermore, the liquid is water.

[0016] The advantages of adopting the above-mentioned further technical solution are: the liquid is clear water, which makes it easy to observe whether there are bubbles, and the cost is low.

[0017] Furthermore, the test assembly includes: an air compressor, a piping system for communicating with the casing head body, and a control valve. The air compressor is installed on the top of the test chamber, the piping system is connected to the air compressor, and the control valve is installed on the piping system.

[0018] The beneficial effects of adopting the above-mentioned further technical solution are: the air compressor is used to compress air; and the control valve is used to open and close the pipeline between the air compressor and the casing head body.

[0019] Furthermore, the piping system includes: an air outlet pipe, a multi-way pipe, multiple sealing sleeves for communicating with the sleeve head body, multiple sealing pipes, and multiple input pipes. The air compressor is connected to the air outlet pipe, the air outlet pipe is connected to the multi-way pipe, the multi-way pipe is connected to multiple input pipes, the multiple input pipes are connected to multiple sealing pipes, and the multiple sealing pipes are connected to multiple sealing sleeves. The number of control valves is multiple, and the multiple control valves are respectively installed on the multiple input pipes.

[0020] The beneficial effect of adopting the above-mentioned further technical solution is that when the air compressor is working, compressed gas is delivered into the four-way pipe through the outlet pipe, and then enters the interior of the sleeve head body after passing through the inlet pipe and the sealing pipe. Several sealing sleeves are fitted and installed on the outer wall of the corresponding sleeve head body to form a seal.

[0021] Furthermore, the multi-way pipe is a four-way pipe, and the multiple input pipes are respectively connected to the multiple sealing pipes through connecting flanges, and a pressure relief valve is installed on the sealing pipe.

[0022] The beneficial effect of adopting the above-mentioned further technical solution is that the opening of the pressure relief valve allows the air pressure inside the casing head body to be discharged through the pressure relief valve.

[0023] Furthermore, a sleeve head body is provided in the test area, and a sensor is installed inside the sleeve head body.

[0024] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the continuous sensing of pressure changes inside the casing head body by the sensor.

[0025] Furthermore, a positioning ring is installed on the top of the inner wall of the sleeve head body, and multiple elastic abutment seats are installed on the side wall of the positioning ring. The sensor is installed in the positioning ring; the sensor is a pressure sensor.

[0026] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Positioning rings are installed on the top of the inner wall of several casing heads; elastic abutment seats are fixedly installed on the outer wall of several positioning rings; and pressure sensors are installed on the inner wall of several positioning rings. The movable positioning rings drive the elastic abutment seats to abut against the inner wall of the casing head body. This facilitates the installation and removal of pressure sensors and allows for continuous sensing of pressure changes inside the casing head body via pressure sensors.

[0027] Furthermore, the clamping assembly includes: a mounting base, a fixed clamp, a movable clamp, and an elastic component. The mounting base is installed in the test area, the fixed clamp is installed on one side of the inner wall of the mounting base, the movable clamp is slidably installed on the other side of the inner wall of the mounting base, and the two ends of the elastic component abut against the movable clamp and the inner wall of the mounting base, respectively.

[0028] The beneficial effects of adopting the above-mentioned further technical solution are: before testing, the sleeve head is vertically clamped and fixed to prevent tipping during testing, thus improving the overall performance and reliability of the sleeve head in subsequent actual use. The movable clamp slides inside the C-shaped seat and compresses the abutment spring. When the movable clamp slides within the inner wall of the C-shaped seat, it drives the positioning rod to slide outward within the C-shaped seat, placing the sleeve head body into the position between the fixed clamp and the movable clamp within the C-shaped seat. Releasing the operating rod, under the elastic action of the abutment spring, pushes the movable clamp to slide inside the C-shaped seat. Through the cooperation of the fixed clamp and the movable clamp, the sleeve head body is clamped and fixed.

[0029] Furthermore, the movable clamp is equipped with a plurality of positioning rods, which are slidably mounted on the mounting base.

[0030] The beneficial effects of adopting the above-mentioned further technical solution are: the positioning rod facilitates the stable sliding of the movable clamp relative to the mounting base, thereby improving stability and reliability.

[0031] Furthermore, the mounting base is a C-shaped base, the elastic component is an abutment spring, and both the fixed clamp and the movable clamp are arc-shaped plates.

[0032] The advantages of adopting the above-mentioned further technical solution are: the elastic component is a contact spring, which simplifies the structure and reduces costs. Both the fixed clamp and the movable clamp are arc-shaped plates, which facilitates stable clamping of the sleeve head by the fixed clamp and the movable clamp.

[0033] Furthermore, an operating lever is installed on the top of the movable clamp, and a limiting groove adapted to the operating lever is opened on the top of the mounting base, and the operating lever is slidably installed in the limiting groove.

[0034] The beneficial effects of adopting the above-mentioned further technical solution are: the operating lever is designed to facilitate the user to move the clamping seat by operating the lever; the limiting groove is designed to facilitate the stable sliding of the operating lever within the limiting groove.

[0035] Furthermore, a controller is installed on the test box, the controller is electrically connected to the test component, and the controller is connected to a power source.

[0036] The beneficial effects of adopting the above-mentioned further technical solutions are: the controller is used to automatically control the test process, thereby improving automation.

[0037] Furthermore, the present invention also provides a hydrostatic pressure testing method for a casing head. Based on the above-mentioned hydrostatic pressure testing device for a casing head, the hydrostatic pressure testing method for a casing head includes: S1, clamping the casing head body with a clamping assembly; S2, injecting liquid into a test chamber and installing a sensor in the casing head body; S3, connecting the test assembly to the casing head body; S4, injecting air into the casing head body through the test assembly; S5, testing the airtightness of the casing head body.

[0038] The beneficial effects of adopting the technical solution of the present invention are: after the casing head is produced, a hydrostatic pressure test can be performed on it to measure the overall sealing effect of the casing head, preventing the existence of leakage from going unnoticed. At the same time, the casing head is vertically clamped and fixed before the test to prevent it from tipping over during the test, thereby improving the overall effect and reliability of the casing head in subsequent actual use.

[0039] Further, step S1 includes: S11, placing multiple clamping sleeve head bodies into the test box; S12, separating the multiple clamping sleeve head bodies by means of a partition plate; S13, moving the movable clamp away from the fixed clamp by means of an operating lever; S14, placing the multiple clamping sleeve head bodies on the mounting base respectively; S15, releasing the operating lever, so that the movable clamp moves closer to the fixed clamp under the elastic action of the elastic component, thereby achieving clamping of the clamping sleeve head bodies.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The partition plate facilitates the division of the test chamber into multiple test areas, enabling simultaneous testing of multiple sleeve heads and improving testing efficiency. Furthermore, the partition plate prevents interference between test areas regarding the presence or absence of air bubbles, facilitating rapid identification of the airtightness of sleeve heads in each test area. Vertical clamping and fixing of the sleeve head before testing prevents tipping during testing, improving the overall performance and reliability of the sleeve head in subsequent practical use. The movable clamp slides within the C-shaped seat and compresses the abutment spring. When the movable clamp slides within the inner wall of the C-shaped seat, it drives the positioning rod to slide outward within the C-shaped seat, placing the sleeve head body into the position between the fixed clamp and the movable clamp within the C-shaped seat. Releasing the operating rod, under the elastic action of the abutment spring, pushes the movable clamp to slide within the C-shaped seat, clamping and fixing the sleeve head body through the cooperation of the fixed clamp and the movable clamp.

[0041] Further, step S2 includes: S21, injecting clean water into the test chamber; S22, installing the pressure sensor in the sleeve head body through the positioning ring and the elastic abutment seat.

[0042] The advantages of adopting the above-mentioned further technical solution are: the liquid is clear water, making it easy to observe whether there are air bubbles, and the cost is low. Positioning rings are installed on the top of the inner wall of several casing heads, elastic abutment seats are fixedly installed on the outer wall of several positioning rings, and pressure sensors are installed on the inner wall of several positioning rings. The movable positioning rings drive the elastic abutment seats to abut against the inner wall of the casing head body. This facilitates the installation and removal of pressure sensors and allows for continuous sensing of pressure changes inside the casing head body via pressure sensors.

[0043] Furthermore, in step S3, the sealing sleeve is fitted onto the top of the sleeve head body.

[0044] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the quick connection between the sealing sleeve and the sleeve head body, thereby improving testing efficiency.

[0045] Further, step S4 includes: S41, closing the pressure relief valve and opening the control valve and air compressor; S42, detecting the pressure change inside the casing head body through the pressure sensor; S43, determining whether the pressure inside the casing head body has reached the preset value through the controller; S44, when the pressure inside the casing head body reaches the preset value, closing the control valve.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are as follows: when the air compressor is working, it delivers compressed gas to the four-way pipe through the outlet pipe, and after passing through the inlet pipe and the sealing pipe, it enters the interior of the sleeve head body. The pressure sensor continuously senses the pressure change inside the sleeve head body, and when the rated value is reached, the control valve is controlled to reduce the airflow.

[0047] Further, step S5 includes: S51, observing whether there are visible continuous bubbles rising in the test area while the sleeve head body is within the preset pressure holding period; S52, after the preset pressure holding period is reached, closing the control valve and opening the pressure relief valve.

[0048] The beneficial effects of adopting the above-mentioned further technical solution are: the pressure holding period of the casing head body is not less than the rated value, and no visible continuous bubbles should rise in the test area within the specified pressure holding period. When the pressure holding time is reached, the control valve is closed and the pressure relief valve is opened to allow the air pressure inside the casing head body to be discharged through the pressure relief valve.

[0049] Furthermore, after step S52, the process includes: after the pressure value of the pressure sensor returns to zero, continuing to execute steps S4 to S5.

[0050] The beneficial effects of adopting the above-mentioned further technical solution are as follows: After the pressure sensor value returns to zero, compressed gas is continuously supplied to the casing head body in the above manner, and the pressure relief valve is controlled to close while the control valve is opened. Once the pressure sensor measures the rated pressure value, a pressure holding test is performed again. Multiple tests improve detection accuracy. Dual testing and pressure holding of the casing head body improves the accuracy of the detection structure.

[0051] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0052] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is one of the structural schematic diagrams of the hydrostatic pressure testing device for the casing head provided in an embodiment of the present invention.

[0054] Figure 2 This is a second schematic diagram of the hydrostatic pressure testing device for the casing head provided in an embodiment of the present invention.

[0055] Figure 3 This is one of the structural schematic diagrams of the test component provided in an embodiment of the present invention.

[0056] Figure 4 This is a second schematic diagram of the structure of the test component provided in an embodiment of the present invention.

[0057] Figure 5 for Figure 4 A magnified view of a portion of the structure shown at point A.

[0058] Figure 6 This is a schematic diagram of the clamping assembly provided in an embodiment of the present invention.

[0059] Reference numerals: 1. Test chamber; 2. Controller; 3. Divider plate; 4. Test assembly; 41. Air compressor; 42. Air outlet pipe; 43. Four-way pipe; 44. Sealing sleeve; 45. Sealing pipe; 46. Pressure relief valve; 47. Input pipe; 48. Control valve; 49. Positioning ring; 410. Elastic abutment seat; 411. Pressure sensor; 5. Clamping assembly; 51. C-shaped seat; 52. Limiting groove; 53. Fixed clamp; 54. Moving clamp; 55. Operating lever; 56. Abutment spring; 57. Positioning rod; 6. Sleeve head body; 7. Test area. Detailed Implementation

[0060] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0062] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0063] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0064] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0065] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0066] like Figures 1 to 6 As shown, this embodiment of the invention provides a hydrostatic pressure testing device for a sleeve head, comprising: a test chamber 1, a test component 4, and at least one clamping component 5. The test component 4 is mounted on the test chamber 1, the test chamber 1 is provided with at least one test area 7, the clamping component 5 is mounted in the test area 7, and the test chamber 1 is provided with liquid.

[0067] The beneficial effects of adopting the technical solution of the present invention are: after the casing head is produced, a hydrostatic pressure test can be performed on it to measure the overall sealing effect of the casing head, preventing the existence of leakage from going unnoticed. At the same time, the casing head is vertically clamped and fixed before the test to prevent it from tipping over during the test, thereby improving the overall effect and reliability of the casing head in subsequent actual use.

[0068] The test component 4 is configured to deliver compressed gas into the casing head body 6 during operation, while the casing head body 6 is placed in the test area 7 filled with clean water. The casing head body 6 is pressurized, and the presence of continuous bubbles rising in the clean water in the test area 7 is monitored to detect whether there is a leakage problem in the casing head body 6. The dual testing and pressure holding of the casing head body 6 improves the accuracy of the detection structure.

[0069] like Figures 1 to 6 As shown, the test box 1 is further provided with a cavity, and there are multiple clamping components 5. A partition plate 3 is installed in the cavity of the test box 1, and the partition plate 3 divides the cavity of the test box 1 into multiple test areas 7. The multiple clamping components 5 are respectively installed in the multiple test areas 7.

[0070] The beneficial effects of adopting the above-mentioned further technical solution are: the cavity design facilitates the containment of liquid, various components, and cannula heads. The partition plate design facilitates the division of the test chamber cavity into multiple test zones, enabling simultaneous testing of multiple cannula heads and improving testing efficiency. Furthermore, the partition plate design ensures that the presence or absence of air bubbles in each test zone does not interfere with each other, facilitating rapid identification of the airtightness of the cannula heads in each test zone.

[0071] like Figures 1 to 6As shown, the test box 1 has an L-shaped structure; the partition plate 3 has a cross-shaped structure.

[0072] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The test chamber has an L-shaped structure, which facilitates the use of the hydrostatic testing device for the sleeve head, simplifies the structure, and reduces space occupancy. The partition plate has a cross-shaped structure, which facilitates the quick division of the test chamber cavity into multiple test areas, making operation easier and improving testing efficiency.

[0073] Furthermore, the liquid is water.

[0074] The advantages of adopting the above-mentioned further technical solution are: the liquid is clear water, which makes it easy to observe whether there are bubbles, and the cost is low.

[0075] like Figures 1 to 6 As shown, the test assembly 4 further includes: an air compressor 41, a pipeline system for communicating with the sleeve head body 6, and a control valve 48. The air compressor 41 is installed on the top of the test box 1, the pipeline system is connected to the air compressor 41, and the control valve 48 is installed on the pipeline system.

[0076] The beneficial effects of adopting the above-mentioned further technical solution are: the air compressor is used to compress air; and the control valve is used to open and close the pipeline between the air compressor and the casing head body.

[0077] like Figures 1 to 6 As shown, the piping system further includes: an air outlet pipe 42, a multi-way pipe, multiple sealing sleeves 44 for communicating with the sleeve head body 6, multiple sealing pipes 45, and multiple input pipes 47. The air compressor 41 is connected to the air outlet pipe 42, the air outlet pipe 42 is connected to the multi-way pipe, the multi-way pipe is connected to multiple input pipes 47, the multiple input pipes 47 are connected to multiple sealing pipes 45, and the multiple sealing pipes 45 are connected to multiple sealing sleeves 44. The number of control valves 48 is multiple, and the multiple control valves 48 are respectively installed on the multiple input pipes 47.

[0078] The beneficial effect of adopting the above-mentioned further technical solution is that when the air compressor is working, compressed gas is delivered into the four-way pipe through the outlet pipe, and then enters the interior of the sleeve head body after passing through the inlet pipe and the sealing pipe. Several sealing sleeves are fitted and installed on the outer wall of the corresponding sleeve head body to form a seal.

[0079] like Figures 1 to 6 As shown, further, the multi-way pipe is a four-way pipe 43, and the multiple input pipes 47 are respectively connected to the multiple sealing pipes 45 through connecting flanges. A pressure relief valve 46 is installed on the sealing pipe 45.

[0080] The beneficial effect of adopting the above-mentioned further technical solution is that the opening of the pressure relief valve allows the air pressure inside the casing head body to be discharged through the pressure relief valve.

[0081] like Figures 1 to 6 As shown, the test area 7 is further provided with a sleeve head body 6, and a sensor is installed inside the sleeve head body 6.

[0082] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the continuous sensing of pressure changes inside the casing head body by the sensor.

[0083] like Figures 1 to 6 As shown, further, a positioning ring 49 is installed on the top of the inner wall of the sleeve head body 6, and a plurality of elastic abutment seats 410 are installed on the side wall of the positioning ring 49. The sensor is installed in the positioning ring 49; the sensor is a pressure sensor 411.

[0084] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Positioning rings are installed on the top of the inner wall of several casing heads; elastic abutment seats are fixedly installed on the outer wall of several positioning rings; and pressure sensors are installed on the inner wall of several positioning rings. The movable positioning rings drive the elastic abutment seats to abut against the inner wall of the casing head body. This facilitates the installation and removal of pressure sensors and allows for continuous sensing of pressure changes inside the casing head body via pressure sensors.

[0085] like Figures 1 to 6 As shown, the clamping assembly 5 further includes: a mounting base, a fixed clamp 53, a movable clamp 54, and an elastic component. The mounting base is installed in the test area 7. The fixed clamp 53 is installed on one side of the inner wall of the mounting base. The movable clamp 54 is slidably installed on the other side of the inner wall of the mounting base. The two ends of the elastic component abut against the movable clamp 54 and the inner wall of the mounting base, respectively.

[0086] The beneficial effects of adopting the above-mentioned further technical solution are: before testing, the sleeve head is vertically clamped and fixed to prevent tipping during testing, thus improving the overall performance and reliability of the sleeve head in subsequent actual use. The movable clamp slides inside the C-shaped seat and compresses the abutment spring. When the movable clamp slides within the inner wall of the C-shaped seat, it drives the positioning rod to slide outward within the C-shaped seat, placing the sleeve head body into the position between the fixed clamp and the movable clamp within the C-shaped seat. Releasing the operating rod, under the elastic action of the abutment spring, pushes the movable clamp to slide inside the C-shaped seat. Through the cooperation of the fixed clamp and the movable clamp, the sleeve head body is clamped and fixed.

[0087] like Figures 1 to 6 As shown, further, a plurality of positioning rods 57 are mounted on the movable clamp 54, and the plurality of positioning rods 57 are slidably mounted on the mounting base.

[0088] The beneficial effects of adopting the above-mentioned further technical solution are: the positioning rod facilitates the stable sliding of the movable clamp relative to the mounting base, thereby improving stability and reliability.

[0089] like Figures 1 to 6 As shown, the mounting base is a C-shaped base 51, the elastic component is an abutment spring 56, and the fixed clamp 53 and the movable clamp 54 are both arc-shaped plates.

[0090] The advantages of adopting the above-mentioned further technical solution are: the elastic component is a contact spring, which simplifies the structure and reduces costs. Both the fixed clamp and the movable clamp are arc-shaped plates, which facilitates stable clamping of the sleeve head by the fixed clamp and the movable clamp.

[0091] like Figures 1 to 6 As shown, further, an operating lever 55 is installed on the top of the movable clamp 54, and a limiting groove 52 adapted to the operating lever 55 is opened on the top of the mounting base, and the operating lever 55 is slidably installed in the limiting groove 52.

[0092] The beneficial effects of adopting the above-mentioned further technical solution are: the operating lever is designed to facilitate the user to move the clamping seat by operating the lever; the limiting groove is designed to facilitate the stable sliding of the operating lever within the limiting groove.

[0093] like Figures 1 to 6 As shown, the test box 1 is further equipped with a controller 2, which is electrically connected to the test component 4 and is connected to a power source.

[0094] The beneficial effects of adopting the above-mentioned further technical solutions are: the controller is used to automatically control the test process, thereby improving automation.

[0095] This invention provides a hydrostatic testing device for casing heads, addressing the problem in existing technologies where hydrostatic testing of casing heads after production fails to effectively detect their sealing performance, leading to difficulties in timely detection of leaks. This device and method allow for hydrostatic testing of casing heads immediately after production, measuring their overall sealing performance and preventing undetected leaks. Furthermore, the device vertically clamps and secures the casing head before testing to prevent tipping, improving its overall performance and reliability in subsequent use.

[0096] like Figures 1 to 6As shown in the figure, an embodiment of the present invention provides a hydrostatic pressure testing device for a sleeve head, including a test box 1, which is L-shaped. A partition plate 3 is fixedly installed on the inner wall of the test box 1. The partition plate 3 is cross-shaped and divides the inner wall of the test box 1 into several test areas 7. A sleeve head body 6 is installed in each of the several test areas 7 through a clamping assembly 5. A test assembly 4 is installed on the top wall of the test box 1. The test assembly 4 is connected to the corresponding sleeve head body 6. Clean water is added to each of the several test areas 7.

[0097] Test component 4 includes an air compressor 41, which is fixedly connected to the top wall of test chamber 1. The air outlet of the air compressor 41 is connected to an air outlet pipe 42. The bottom end of the air outlet pipe 42 is connected to a four-way pipe 43. The bottom end of each four-way pipe 43 is connected to an input pipe 47. A control valve 48 is installed on the outer wall of each input pipe 47. A sealing pipe 45 is installed at the bottom end of each input pipe 47 through a connecting flange. A pressure relief valve 46 is installed on the outer wall of each sealing pipe 45. A sealing sleeve 44 is connected at the bottom end of each sealing pipe 45. A positioning ring 49 is installed on the top of the inner wall of each sleeve head body 6. An elastic abutment seat 410 is fixedly installed on the outer wall of each positioning ring 49. A pressure sensor 411 is installed on the inner wall of each positioning ring 49.

[0098] Furthermore, several sealing sleeves 44 are fitted onto the outer wall of the corresponding sleeve head body 6 to form a seal.

[0099] Furthermore, the clamping assembly 5 includes several C-shaped seats 51, each of which is fixedly connected to the bottom wall of the corresponding test area, and each of the C-shaped seats 51 has a fixed clamping seat 53 fixedly installed on its inner left wall.

[0100] Furthermore, movable clamps 54 are slidably mounted on the inner right walls of several C-shaped seats 51, and several abutment springs 56 are uniformly fixedly mounted on the outer walls of several movable clamps 54. Each abutment spring 56 is fixedly connected to the inner wall of the corresponding C-shaped seat 51. Among them, the abutment springs 56 can be compression springs.

[0101] Furthermore, each of the several movable clamps 54 has an operating rod 55 fixedly installed on its top wall. Each of the several operating rods 55 has a limit groove 52 on its outer wall at a position corresponding to the top wall of the C-shaped seat 51. The inner wall of each of the several limit grooves 52 is slidably connected to the outer wall of the corresponding operating rod 55.

[0102] Furthermore, several positioning rods 57 are evenly fixedly installed on the outer walls of several movable clamps 54, and the right ends of several positioning rods 57 slide through the corresponding C-shaped seats 51 and extend to the outside.

[0103] Furthermore, the inner walls of several fixed clamps 53 and corresponding movable clamps 54 are all fixed to the outer wall of the sleeve head body 6, and a controller 2 is fixedly installed on the front wall of the test box 1.

[0104] 1. The hydrostatic pressure testing device for the casing head, through the setting of the testing components, can measure the overall sealing effect of the casing head after the casing head is manufactured by performing an inlet pressure test, preventing the unawareness of any leakage and improving the overall performance of the casing head in subsequent actual use.

[0105] 2. The hydrostatic pressure testing device for the casing head, through the setting of the clamping component, vertically clamps and fixes the casing head before testing, preventing the casing head from tilting during testing. It is also convenient to operate during actual use and disassembly, which is beneficial to the staff.

[0106] Furthermore, the present invention also provides a hydrostatic pressure testing method for a casing head. Based on the above-mentioned hydrostatic pressure testing device for a casing head, the hydrostatic pressure testing method for a casing head includes: S1, clamping the casing head body with a clamping assembly; S2, injecting liquid into a test chamber and installing a sensor in the casing head body; S3, connecting the test assembly to the casing head body; S4, injecting air into the casing head body through the test assembly; S5, testing the airtightness of the casing head body.

[0107] The beneficial effects of adopting the technical solution of the present invention are: after the casing head is produced, a hydrostatic pressure test can be performed on it to measure the overall sealing effect of the casing head, preventing the existence of leakage from going unnoticed. At the same time, the casing head is vertically clamped and fixed before the test to prevent it from tipping over during the test, thereby improving the overall effect and reliability of the casing head in subsequent actual use.

[0108] Further, step S1 includes: S11, placing multiple clamping sleeve head bodies into the test box; S12, separating the multiple clamping sleeve head bodies by means of a partition plate; S13, moving the movable clamp away from the fixed clamp by means of an operating lever; S14, placing the multiple clamping sleeve head bodies on the mounting base respectively; S15, releasing the operating lever, so that the movable clamp moves closer to the fixed clamp under the elastic action of the elastic component, thereby achieving clamping of the clamping sleeve head bodies.

[0109] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The partition plate facilitates the division of the test chamber into multiple test areas, enabling simultaneous testing of multiple sleeve heads and improving testing efficiency. Furthermore, the partition plate prevents interference between test areas regarding the presence or absence of air bubbles, facilitating rapid identification of the airtightness of sleeve heads in each test area. Vertical clamping and fixing of the sleeve head before testing prevents tipping during testing, improving the overall performance and reliability of the sleeve head in subsequent practical use. The movable clamp slides within the C-shaped seat and compresses the abutment spring. When the movable clamp slides within the inner wall of the C-shaped seat, it drives the positioning rod to slide outward within the C-shaped seat, placing the sleeve head body into the position between the fixed clamp and the movable clamp within the C-shaped seat. Releasing the operating rod, under the elastic action of the abutment spring, pushes the movable clamp to slide within the C-shaped seat, clamping and fixing the sleeve head body through the cooperation of the fixed clamp and the movable clamp.

[0110] Further, step S2 includes: S21, injecting clean water into the test chamber; S22, installing the pressure sensor in the sleeve head body through the positioning ring and the elastic abutment seat.

[0111] The advantages of adopting the above-mentioned further technical solution are: the liquid is clear water, making it easy to observe whether there are air bubbles, and the cost is low. Positioning rings are installed on the top of the inner wall of several casing heads, elastic abutment seats are fixedly installed on the outer wall of several positioning rings, and pressure sensors are installed on the inner wall of several positioning rings. The movable positioning rings drive the elastic abutment seats to abut against the inner wall of the casing head body. This facilitates the installation and removal of pressure sensors and allows for continuous sensing of pressure changes inside the casing head body via pressure sensors.

[0112] Furthermore, in step S3, the sealing sleeve is fitted onto the top of the sleeve head body.

[0113] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the quick connection between the sealing sleeve and the sleeve head body, thereby improving testing efficiency.

[0114] Further, step S4 includes: S41, closing the pressure relief valve and opening the control valve and air compressor; S42, detecting the pressure change inside the casing head body through the pressure sensor; S43, determining whether the pressure inside the casing head body has reached the preset value through the controller; S44, when the pressure inside the casing head body reaches the preset value, closing the control valve.

[0115] The beneficial effects of adopting the above-mentioned further technical solution are as follows: when the air compressor is working, it delivers compressed gas to the four-way pipe through the outlet pipe, and after passing through the inlet pipe and the sealing pipe, it enters the interior of the sleeve head body. The pressure sensor continuously senses the pressure change inside the sleeve head body, and when the rated value is reached, the control valve is controlled to reduce the airflow.

[0116] Further, step S5 includes: S51, observing whether there are visible continuous bubbles rising in the test area while the sleeve head body is within the preset pressure holding period; S52, after the preset pressure holding period is reached, closing the control valve and opening the pressure relief valve.

[0117] The beneficial effects of adopting the above-mentioned further technical solution are: the pressure holding period of the casing head body is not less than the rated value, and no visible continuous bubbles should rise in the test area within the specified pressure holding period. When the pressure holding time is reached, the control valve is closed and the pressure relief valve is opened to allow the air pressure inside the casing head body to be discharged through the pressure relief valve.

[0118] Furthermore, after step S52, the process includes: after the pressure value of the pressure sensor returns to zero, continuing to execute steps S4 to S5.

[0119] The beneficial effects of adopting the above-mentioned further technical solution are as follows: After the pressure sensor value returns to zero, compressed gas is continuously supplied to the casing head body in the above manner, and the pressure relief valve is controlled to close while the control valve is opened. Once the pressure sensor measures the rated pressure value, a pressure holding test is performed again. Multiple tests improve detection accuracy. Dual testing and pressure holding of the casing head body improves the accuracy of the detection structure.

[0120] This invention provides a hydrostatic pressure testing method for a casing head, using the hydrostatic pressure testing device for a casing head as described above, and includes the following steps: The air compressor 41, pressure relief valve 46, control valve 48, and pressure sensor 411 are electrically connected via an external power supply and controller 2. When a hydrostatic test is required on the casing head body 6, the casing head body 6 is first placed in the test area inside the test chamber 1, and the casing head body 6 is separated by the partition plate 3. By pulling the operating rod 55, it slides outward in the limiting groove 52, causing the moving clamp 54 to slide inside the C-shaped seat 51 and compress the abutment spring 56. When the movable clamp 54 slides in the inner wall of the C-shaped seat 51, it will drive the positioning rod 57 to slide outward in the C-shaped seat 51, placing the sleeve head body 6 into the position between the fixed clamp 53 and the movable clamp 54 in the C-shaped seat 51. Releasing the operating rod 55 will push the movable clamp 54 to slide inside the C-shaped seat 51 under the elastic action of the abutment spring 56. The sleeve head body 6 is clamped and fixed by the cooperation of the fixed clamp 53 and the movable clamp 54, and clean water is added to the test area.

[0121] The movable positioning ring 49 drives the elastic abutment seat 410 to abut against and install in the inner wall of the sleeve head body 6. Then, the movable input pipe 47, sealing pipe 45 and sealing sleeve 44 are moved so that the sealing sleeve 44 is sleeved on the corresponding top position of the sleeve head body 6 and the outer wall of the sealing sleeve 44 is fastened and fixed by fasteners. By closing the pressure relief valve 46 and opening the control valve 48, when the air compressor 41 is working, compressed gas is delivered to the four-way pipe 43 through the air outlet pipe 42 and enters the interior of the sleeve head body 6 after passing through the input pipe 47 and sealing pipe 45. The pressure sensor 411 continuously senses the pressure change inside the sleeve head body 6. When the rated value is reached, the control valve 48 is controlled to reduce the air intake. The sleeve head body 6 is in a pressure holding period of not less than the rated value. During the specified pressure holding period, no visible continuous bubbles should rise inside the test area. When the pressure holding time is reached, the control valve 48 is closed and the pressure relief valve 46 is opened so that the air pressure inside the sleeve head body 6 is discharged through the pressure relief valve 46.

[0122] After the pressure value of the pressure sensor 411 returns to zero, compressed gas is supplied to the sleeve head body 6 again in the above manner, and the pressure relief valve 46 is closed and the control valve 48 is opened. After the pressure sensor 411 measures that the rated pressure value has been reached, the pressure holding test is performed again. When no visible continuous bubbles rise in the test area, the sleeve head body 6 is disconnected from the test component, and the sleeve head body 6 is removed from the clamping component 5. After the test is completed, the sleeve head body 6 is taken out from the test area.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrostatic pressure testing device for a casing head, characterized in that, include: The test box (1), the test component (4) and at least one clamping component (5) are provided. The test component (4) is mounted on the test box (1). The test box (1) is provided with at least one test area (7). The clamping component (5) is mounted in the test area (7). The test box (1) is provided with liquid.

2. The hydrostatic pressure testing device for a sleeve head according to claim 1, characterized in that, The test box (1) is provided with a cavity, and there are multiple clamping components (5). A partition plate (3) is installed in the cavity of the test box (1). The partition plate (3) divides the cavity of the test box (1) into multiple test areas (7). The multiple clamping components (5) are respectively installed in the multiple test areas (7).

3. The hydrostatic pressure testing device for a casing head according to claim 2, characterized in that, The test box (1) has an L-shaped structure; the partition plate (3) has a cross-shaped structure.

4. The hydrostatic pressure testing device for a sleeve head according to claim 1, characterized in that, The liquid is water.

5. The hydrostatic pressure testing device for a casing head according to claim 1, characterized in that, The test assembly (4) includes an air compressor (41), a piping system for communicating with the sleeve head body (6), and a control valve (48). The air compressor (41) is installed on the top of the test box (1), the piping system is connected to the air compressor (41), and the control valve (48) is installed on the piping system.

6. A hydrostatic pressure testing device for a casing head according to claim 5, characterized in that, The piping system includes: an air outlet pipe (42), a multi-way pipe, multiple sealing sleeves (44) for communicating with the sleeve head body (6), multiple sealing pipes (45), and multiple input pipes (47). The air compressor (41) is connected to the air outlet pipe (42), the air outlet pipe (42) is connected to the multi-way pipe, the multi-way pipe is connected to multiple input pipes (47), the multiple input pipes (47) are connected to multiple sealing pipes (45), and the multiple sealing pipes (45) are connected to multiple sealing sleeves (44). The number of control valves (48) is multiple, and the multiple control valves (48) are respectively installed on the multiple input pipes (47).

7. A hydrostatic pressure testing device for a casing head according to claim 6, characterized in that, The multi-way pipe is a four-way pipe (43), and the multiple input pipes (47) are connected to the multiple sealing pipes (45) through connecting flanges respectively. A pressure relief valve (46) is installed on the sealing pipe (45).

8. The hydrostatic pressure testing device for a casing head according to claim 1, characterized in that, The test area (7) is provided with a sleeve head body (6), and a sensor is installed inside the sleeve head body (6).

9. A hydrostatic pressure testing device for a casing head according to claim 8, characterized in that, A positioning ring (49) is installed on the top of the inner wall of the sleeve head body (6), and a plurality of elastic abutment seats (410) are installed on the side wall of the positioning ring (49). The sensor is installed in the positioning ring (49); the sensor is a pressure sensor (411).

10. A hydrostatic pressure testing device for a casing head according to claim 1, characterized in that, The clamping assembly (5) includes: a mounting base, a fixed clamp (53), a movable clamp (54), and an elastic component. The mounting base is installed in the test area (7). The fixed clamp (53) is installed on one side of the inner wall of the mounting base. The movable clamp (54) is slidably installed on the other side of the inner wall of the mounting base. The two ends of the elastic component abut against the movable clamp (54) and the inner wall of the mounting base, respectively.

11. A hydrostatic pressure testing device for a casing head according to claim 10, characterized in that, The movable clamp (54) is equipped with a plurality of positioning rods (57), which are slidably mounted on the mounting base.

12. The hydrostatic pressure testing device for a casing head according to claim 10, characterized in that, The mounting base is a C-shaped base (51), the elastic component is an abutment spring (56), and the fixed clamp (53) and the movable clamp (54) are both arc-shaped plates.

13. A hydrostatic pressure testing device for a casing head according to claim 10, characterized in that, An operating lever (55) is installed on the top of the movable clamp (54), and a limiting groove (52) adapted to the operating lever (55) is opened on the top of the mounting base. The operating lever (55) is slidably installed in the limiting groove (52).

14. The hydrostatic pressure testing device for a casing head according to claim 1, characterized in that, The test box (1) is equipped with a controller (2), which is electrically connected to the test component (4) and is connected to a power source.

15. A method for hydrostatic testing of a casing head, characterized in that, Based on any one of claims 1 to 14, a hydrostatic pressure testing device for a casing head is provided, and a hydrostatic pressure testing method for the casing head includes: S1. The sleeve head body is clamped by the clamping assembly; S2. Inject liquid into the test chamber and install the sensor in the sleeve head body; S3. Connect the test component to the sleeve head body; S4. Inject air into the sleeve head body through the test components; S5. Test the airtightness of the sleeve head body.

16. A hydrostatic pressure testing method for a casing head according to claim 15, characterized in that, Step S1 includes: S11, placing multiple clamping sleeve head bodies into the test box; S12. Multiple clamping sleeve head bodies are separated by a partition plate; S13. Move the movable clamp away from the fixed clamp by operating the lever; S14. Place the multiple clamping sleeve head bodies on the mounting base respectively; S15. Release the operating lever so that the movable clamp approaches the fixed clamp under the elastic action of the elastic component, thereby clamping the sleeve head body.

17. A hydrostatic pressure testing method for a casing head according to claim 15, characterized in that, Step S2 includes: S21, injecting clean water into the test chamber; S22. Install the pressure sensor in the sleeve head body through the positioning ring and the elastic abutment seat.

18. A hydrostatic pressure testing method for a casing head according to claim 15, characterized in that, In step S3, the sealing sleeve is fitted onto the top of the sleeve head body.

19. A hydrostatic pressure testing method for a casing head according to claim 15, characterized in that, Step S4 includes: S41, closing the pressure relief valve, opening the control valve and the air compressor; S42. Detect pressure changes inside the casing head body using a pressure sensor; S43. The controller determines whether the pressure inside the bushing head body has reached the preset value. S44. When the pressure inside the casing head body reaches the preset value, close the control valve slightly.

20. A hydrostatic pressure testing method for a casing head according to claim 15, characterized in that, Step S5 includes: S51, while the sleeve head body is within the preset pressure holding period, observe whether there are visible continuous bubbles rising in the test area; S52. After the preset pressure holding period is reached, close the control valve and open the pressure relief valve.

21. A hydrostatic pressure testing method for a casing head according to claim 20, characterized in that, Step S52 is followed by: after the pressure value of the pressure sensor returns to zero, continue executing steps S4 to S5.

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