A pneumatic pressure testing device for oilfield operations

Abstract

The utility model discloses a kind of oilfield operation pneumatic pressure testing device, it includes main support, pressure generation module and pressure transmission component.Pressure generation module generates pressure by air cylinder, piston and driving rod, pressure transmission component is composed of gas holder, pressure regulating valve and output connector, realize pressure storage and regulation.Gas holder is equipped with partition and spring type check valve, prevent overpressure;Output connector uses corrosion-resistant coating and sealing ring to enhance the reliability of connection.The bottom of main support is equipped with supporting foot and non-slip mat, improve stability.The device is simple in structure, convenient to operate, can efficiently and stably complete pressure testing task, applicable to complex oilfield environment, significantly improve work efficiency and reduce labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of oilfield operation pneumatic pressure testing device. Background Technology

[0002] In oilfield operations, pressure testing is a crucial step in verifying the sealing and pressure-bearing capacity of pipelines and equipment. Traditional pressure testing methods typically rely on manual pressurization or hydraulic devices. However, due to the complex environment and frequent pressure testing required in oilfields, manual pressurization is inefficient, labor-intensive, and fails to meet the demands of high-efficiency operations. While hydraulic pressure testing devices can provide high pressures, their complex structure and maintenance costs are high, and they require highly clean working media, making them susceptible to system malfunctions due to impurities. Furthermore, existing pressure testing equipment often requires additional power sources or complex piping connections, increasing operational difficulty and preparation time, thus impacting overall work efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a pneumatic pressure testing device for oilfield operations, which solves the problems mentioned in the background art.

[0004] This utility model is implemented as follows: an oilfield operation pneumatic pressure testing device, which mainly consists of: a main support, a pressure generating module installed on the main support, and a pressure transmission component connected to the pressure generating module; the main support is the main load-bearing structure, and the pressure generating module and the pressure transmission component are both installed on the main support, and the two are connected by pipelines to form a complete pressure transmission path.

[0005] A further technical solution of this utility model is: the pressure generating module includes a cylinder, a piston disposed in the cylinder, and a drive rod connected to the piston. The cylinder is fixed to one side of the main support. The drive rod passes through the end cover of the cylinder and extends to the outside. A handwheel is provided at its outer end. By rotating the handwheel, the drive rod is driven to move axially, thereby pushing the piston to reciprocate in the cylinder to generate pressure.

[0006] A further technical solution of this utility model is: the inner wall of the cylinder is provided with a guide groove, and the outer periphery of the piston is provided with a protruding ring that matches the guide groove. The protruding ring is embedded in the guide groove, so that the piston moves in a straight line in the cylinder without deviating; the bottom of the cylinder is provided with a one-way inlet valve and a one-way outlet valve, which are used to control the entry and exit of gas, respectively.

[0007] A further technical solution of this utility model is: the pressure transmission component includes an air tank, a pressure regulating valve disposed on the air tank, and an output connector connected to the air tank. The air tank is connected to the one-way air outlet valve of the cylinder through a pipeline. The pressure regulating valve is installed on the top of the air tank for adjusting the output pressure. The output connector is disposed on the side of the air tank for connecting to the device under test or a pipeline.

[0008] A further technical solution of this utility model is: the gas storage tank is provided with a partition plate inside, which divides the gas storage tank into upper and lower parts, the upper part being a high-pressure chamber and the lower part being a buffer chamber; a through hole is provided at the center of the partition plate, and a spring-type check valve is installed in the through hole. When the pressure in the high-pressure chamber exceeds the set value, the check valve opens, and the gas flows into the buffer chamber, thereby avoiding damage to the equipment due to excessive pressure.

[0009] A further technical solution of this utility model is: the outer end of the output connector is provided with a threaded connection section, the surface of which is coated with a corrosion-resistant coating to enhance the durability of the connector; the inner end of the output connector is provided with a sealing ring, which is made of polytetrafluoroethylene material to ensure sealing performance during gas transmission.

[0010] A further technical solution of this utility model is: the bottom of the main support is provided with support feet, the number of support feet is four and they are evenly distributed at the four corners of the main support, and the bottom of each support foot is provided with an anti-slip pad, which is made of rubber material to improve the stability of the device on the ground; the side of the main support is also provided with a tool hook, which is used to hang auxiliary tools for easy use by operators.

[0011] A further technical solution of this utility model is: a limiting plate is provided at the outer end of the drive rod, the diameter of the limiting plate is larger than the diameter of the drive rod, a compression spring is provided between the limiting plate and the cylinder end cover, the compression spring is sleeved on the drive rod, and when the operator releases the handwheel, the compression spring automatically resets the drive rod, thereby driving the piston back to the initial position.

[0012] A further technical solution of this utility model is: a knob is provided on the top of the pressure regulating valve, and the outer surface of the knob is provided with anti-slip texture to facilitate manual adjustment by the operator; a conical valve core is provided inside the pressure regulating valve, and a variable cross-section channel is formed between the conical valve core and the valve body of the pressure regulating valve. By rotating the knob, the position of the conical valve core is changed, thereby regulating the flow rate and pressure of the gas.

[0013] The beneficial effects of this utility model are as follows: This pneumatic pressure testing device for oilfield operations generates pressure through the cooperation of a cylinder and piston, and stores and regulates the pressure using an air tank and a pressure regulating valve, achieving efficient and stable pressure testing operations. The guide groove and raised ring design inside the cylinder ensure the linear motion accuracy of the piston, avoiding pressure instability caused by deviation; the partition plate and spring-loaded check valve inside the air tank effectively prevent overpressure, improving equipment safety; the threaded connection section and sealing ring design of the output connector enhance the reliability and sealing of the connection. In addition, the support feet of the main support and the tool hook design improve the stability and portability of the device, making it suitable for complex oilfield operating environments. The overall structure is simple and easy to maintain, significantly improving pressure testing efficiency, reducing labor intensity, and meeting the high-efficiency requirements of oilfield operations. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the layout and connection relationship of the main support, the pressure generation module and the pressure transmission component. The pressure generation module includes a cylinder, a piston and a drive rod, and the pressure transmission component includes an air tank and a pressure regulating valve.

[0015] Figure 2 This is a sectional view of the internal structure of the cylinder, highlighting the guide groove on the inner wall of the cylinder, the raised ring on the piston, and the one-way intake valve and one-way exhaust valve at the bottom. The handwheel and limit plate at the outer end of the drive rod are also marked.

[0016] Figure 3 This is a schematic diagram of the internal structure of the gas storage tank, showing the structure of the partition plate dividing the gas storage tank into a high-pressure chamber and a buffer chamber, as well as the spring-loaded check valve in the center of the partition plate and the pressure regulating valve on the top of the gas storage tank.

[0017] The attached diagram is labeled as follows: 1. Main support; 2. Cylinder; 3. Piston; 4. Drive rod; 5. Handwheel; 6. Guide groove; 7. Raised ring; 8. One-way inlet valve; 9. One-way outlet valve; 10. Air tank; 11. Pressure regulating valve; 12. Output connector; 13. Divider plate; 14. High-pressure chamber; 15. Buffer chamber; 16. Spring-loaded check valve; 17. Support foot; 18. Tool hook; 19. Limiting plate; 20. Compression spring. Detailed Implementation

[0018] The specific implementation method of the pneumatic pressure testing device for oilfield operations of this utility model is described in conjunction with the appendix. Figure 1 To be continued Figure 3A detailed description is provided below. The device mainly consists of a main support 1, a pressure generating module, and a pressure transmission assembly. The pressure generating module includes a cylinder 2, a piston 3, and a drive rod 4. The pressure transmission assembly includes an air tank 10, a pressure regulating valve 11, and an output connector 12. The following will describe this utility model in detail from aspects such as its overall structural layout, the connection relationships of its components, and its working principle.

[0019] The main support 1 is the main load-bearing structure of the entire device. It is a rectangular frame made of high-strength steel to ensure sufficient load-bearing capacity. The main support 1 has four support feet 17 at its bottom, evenly distributed at the four corners. Each support foot 17 has a fixed anti-slip pad made of rubber, which effectively improves the stability of the device on the ground, especially on uneven or slippery surfaces encountered in oilfield operations. The main support 1 also has two tool hooks 18 on its sides, arranged symmetrically, for hanging auxiliary tools, facilitating tool use and storage for operators, thereby improving work efficiency.

[0020] Cylinder 2 is fixedly mounted on one side of main support 1, with its axis parallel to the longitudinal centerline of main support 1. Cylinder 2 has a hollow internal structure with guide grooves 6 on its inner wall, extending axially along the cylinder 2. Piston 3 is located inside cylinder 2, with a raised ring 7 on its outer circumference. The raised ring 7 is embedded in the guide groove 6, allowing piston 3 to move linearly within cylinder 2 without deviation. This design effectively avoids pressure instability caused by piston 3 deviating from its axis. A one-way inlet valve 8 and a one-way outlet valve 9 are located at the bottom of cylinder 2. The one-way inlet valve 8, located near one end of cylinder 2, controls the entry of external gas into the cavity of cylinder 2, while the one-way outlet valve 9, located near the other end of cylinder 2, discharges high-pressure gas from cylinder 2 to the subsequent pressure transmission assembly. The one-way inlet valve 8 and one-way outlet valve 9 are fixed to the bottom of cylinder 2 via threaded connections and sealed with sealing rings.

[0021] The drive rod 4 passes through the end cover of the cylinder 2 and extends to the outside. One end is fixedly connected to the piston 3, and the other end is equipped with a handwheel 5. The handwheel 5 is located outside the cylinder 2. The operator can rotate the handwheel 5 to move the drive rod 4 axially, thereby pushing the piston 3 to reciprocate within the cylinder 2 to generate pressure. A limiting disc 19, larger in diameter than the drive rod 4, is located outside the end cover of the cylinder 2 at the outer end of the drive rod 4. A compression spring 20 is positioned between the limiting disc 19 and the end cover of the cylinder 2, and is sleeved on the drive rod 4. When the operator releases the handwheel 5, the compression spring 20 automatically resets the drive rod 4, thereby returning the piston 3 to its initial position. This design not only improves operational convenience but also effectively prevents equipment damage caused by misoperation.

[0022] The gas storage tank 10 is connected to the one-way outlet valve 9 of the cylinder 2 via a pipe. The gas storage tank 10 is cylindrical in shape and has an internal partition plate 13 that divides it into upper and lower parts: an upper high-pressure chamber 14 and a lower buffer chamber 15. A through hole is located at the center of the partition plate 13, and a spring-loaded check valve 16 is installed inside the through hole. When the pressure in the high-pressure chamber 14 exceeds a set value, the spring-loaded check valve 16 opens, allowing gas to flow into the buffer chamber 15, thus preventing damage to the equipment due to excessive pressure. A pressure regulating valve 11 is located at the top of the gas storage tank 10, used to adjust the output pressure. A knob is located at the top of the pressure regulating valve 11, with anti-slip textures on its outer surface for easy manual adjustment. Inside the pressure regulating valve 11 is a conical valve core, forming a variable cross-section channel between the conical valve core and the valve body. Rotating the knob changes the position of the conical valve core, thereby adjusting the gas flow and pressure. The gas storage tank 10 has an output connector 12 on its side, which is used to connect to the device under test or pipeline. The outer end of the output connector 12 has a threaded connection section, the surface of which is coated with a corrosion-resistant coating to enhance the durability of the connector. The inner end of the output connector 12 has a sealing ring made of polytetrafluoroethylene to ensure sealing performance during gas transmission.

[0023] In actual operation, the operator first rotates handwheel 5 to drive drive rod 4 axially, thereby pushing piston 3 to reciprocate within cylinder 2. When piston 3 moves towards the bottom of cylinder 2, the volume of the cavity within cylinder 2 decreases, and the gas is compressed and enters the high-pressure chamber 14 of gas storage tank 10 through one-way exhaust valve 9. At this time, one-way intake valve 8 closes to prevent gas backflow. When piston 3 moves towards the top of cylinder 2, the volume of the cavity within cylinder 2 increases, and external gas enters cylinder 2 through one-way intake valve 8. At this time, one-way exhaust valve 9 closes to ensure that gas does not flow back into cylinder 2. Through repeated reciprocating motion, the gas within cylinder 2 is gradually compressed and stored in the high-pressure chamber 14 of gas storage tank 10. When the pressure in high-pressure chamber 14 reaches the set value, the operator adjusts the output pressure by rotating the knob of pressure regulating valve 11, allowing the gas to be delivered to the device under test or pipeline for pressure testing through output connector 12. If the pressure in the high-pressure chamber 14 exceeds the set value, the spring-loaded check valve 16 opens, and gas flows into the buffer chamber 15, thereby preventing the equipment from being damaged due to overpressure.

[0024] The overall structure of this utility model is simple, and the connection between various components is tight and reasonable, ensuring efficient and stable pressure testing operations. The guide groove 6 and raised ring 7 in cylinder 2 ensure the linear motion accuracy of piston 3, avoiding pressure instability caused by misalignment. The partition plate 13 and spring-loaded check valve 16 in the gas storage tank 10 effectively prevent overpressure and improve equipment safety. The threaded connection section and sealing ring design of the output connector 12 enhance the reliability and sealing of the connection. In addition, the support feet 17 and tool hooks 18 of the main support 1 improve the stability and portability of the device, making it suitable for complex oilfield operating environments.

[0025] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0026] At the oilfield operation site, operators need to conduct pressure tests on a newly laid section of oil pipeline to verify its sealing and pressure-bearing capacity. First, the operators move the device to the vicinity of the pipeline to be tested and securely place it on the ground using the four support feet 17 at the bottom of the main support 1. The anti-slip pads on the bottom of the support feet 17 generate friction upon contact with the ground, ensuring the device remains stable even on uneven or slippery surfaces. Subsequently, the operators use tool hooks 18 to suspend auxiliary tools required for the pressure test, such as wrenches and sealing tape, for easy access.

[0027] Next, the operator rotates handwheel 5 to move drive rod 4 axially, thereby pushing piston 3 to reciprocate within cylinder 2. As piston 3 moves towards the bottom of cylinder 2, the volume of the cavity within cylinder 2 gradually decreases, and the gas is compressed and enters the high-pressure chamber 14 of gas tank 10 through one-way exhaust valve 9. At this time, one-way intake valve 8 closes to prevent gas backflow. The raised ring 7 on the outer periphery of piston 3 is embedded in the guide groove 6 on the inner wall of cylinder 2, ensuring that piston 3 moves in a straight line without deviation. This design avoids pressure fluctuations caused by piston 3 deviating from the axis, thus ensuring the stability of pressure generation.

[0028] When piston 3 moves towards the top of cylinder 2, the volume of the cavity inside cylinder 2 increases, and external gas enters cylinder 2 through one-way inlet valve 8. At this time, one-way outlet valve 9 closes to ensure that gas does not flow back into cylinder 2. Through repeated reciprocating motion, the gas inside cylinder 2 is gradually compressed and stored in the high-pressure chamber 14 of the gas storage tank 10. The partition plate 13 inside the gas storage tank 10 separates the high-pressure chamber 14 from the buffer chamber 15. When the pressure in the high-pressure chamber 14 exceeds the set value, the spring-loaded check valve 16 in the center of the partition plate 13 opens, and gas flows into the buffer chamber 15, thereby preventing the equipment from being damaged due to overpressure. This design effectively improves the safety of the device and ensures the reliability of the pressure test process.

[0029] Once the pressure in the high-pressure chamber 14 reaches the set value, the operator adjusts the output pressure by rotating the knob on top of the pressure regulating valve 11. A variable cross-section channel is formed between the conical valve core inside the pressure regulating valve 11 and the valve body. By changing the position of the conical valve core, the flow rate and pressure of the gas can be precisely controlled. After adjustment, the high-pressure gas is delivered to the pipeline under test through the output connector 12. The threaded connection section of the output connector 12 is tightly connected to the pipeline interface, and its surface is coated with a corrosion-resistant coating to enhance the durability of the connector; the PTFE sealing ring at the inner end ensures no leakage during gas transmission.

[0030] During the pressure test, operators can assess the sealing performance by observing whether there are any leaks at the pipe joints and welds. If any abnormalities are found, the pressure test can be stopped immediately and repairs made. After the pressure test is completed, the operator releases handwheel 5, and drive rod 4 automatically resets under the action of compression spring 20, driving piston 3 back to its initial position, preparing for the next pressure test.

[0031] Through the above steps, this device can efficiently and stably complete pressure testing operations. The guide groove 6 and raised ring 7 in cylinder 2 ensure the linear motion accuracy of piston 3, avoiding pressure instability caused by misalignment; the partition plate 13 and spring-loaded check valve 16 in the gas storage tank 10 effectively prevent overpressure and improve equipment safety; the threaded connection section and sealing ring design of the output connector 12 enhance the reliability and sealing of the connection. In addition, the support feet 17 and tool hooks 18 of the main support 1 improve the stability and portability of the device, making it suitable for complex oilfield operating environments. The overall structure is simple and easy to maintain, significantly improving pressure testing efficiency, reducing labor intensity, and meeting the high-efficiency requirements of oilfield operations.

[0032] All content not described in detail in this specification is prior art known to those skilled in the art, and the model parameters of each component are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are prior art, and will not be described further here.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic pressure testing device for oilfield operations, characterized in that, The pneumatic pressure testing device for oilfield operations mainly consists of a main support (1), a pressure generating module installed on the main support (1), and a pressure transmission component connected to the pressure generating module. The pressure generating module includes a cylinder (2), a piston (3) installed in the cylinder (2), and a drive rod (4) connected to the piston (3). The pressure transmission component includes an air storage tank (10), a pressure regulating valve (11) installed on the air storage tank (10), and an output connector (12) connected to the air storage tank (10).

2. The pneumatic pressure testing device for oilfield operations according to claim 1, characterized in that: The inner wall of the cylinder (2) is provided with a guide groove (6), and the outer periphery of the piston (3) is provided with a protruding ring (7) that matches the guide groove (6). The bottom of the cylinder (2) is provided with a one-way inlet valve (8) and a one-way outlet valve (9).

3. The pneumatic pressure testing device for oilfield operations according to claim 1, characterized in that: The drive rod (4) passes through the end cover of the cylinder (2) and extends to the outside. A handwheel (5) is provided at its outer end. A limiting plate (19) is provided at the outer end of the drive rod (4). A compression spring (20) is provided between the limiting plate (19) and the end cover of the cylinder (2).

4. The pneumatic pressure testing device for oilfield operations according to claim 1, characterized in that: The gas storage tank (10) is provided with a partition plate (13) inside. The partition plate (13) divides the gas storage tank (10) into two parts, the upper part being a high-pressure chamber (14) and the lower part being a buffer chamber (15). A through hole is provided at the center of the partition plate (13), and 18 (16) is installed in the through hole.

5. The pneumatic pressure testing device for oilfield operations according to claim 1, characterized in that: The outer end of the output connector (12) is provided with a threaded connection section, the surface of which is coated with a corrosion-resistant coating. The inner end of the output connector (12) is provided with a sealing ring, which is made of polytetrafluoroethylene material.

6. The pneumatic pressure testing device for oilfield operations according to claim 1, characterized in that: The main support (1) has four support feet (17) at its bottom, and each support foot (17) has an anti-slip pad at its bottom. The main support (1) also has a tool hook (18) on its side.

7. The pneumatic pressure testing device for oilfield operations according to claim 1, characterized in that: The pressure regulating valve (11) has a knob on its top, and the outer surface of the knob has anti-slip texture. The pressure regulating valve (11) has a conical valve core inside, and a variable cross-section channel is formed between the conical valve core and the valve body of the pressure regulating valve (11).

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