Temperature and pressure detection device applied to underwater Christmas tree

Abstract

The utility model discloses a temperature and pressure detection device applied to an underwater Christmas tree, which comprises a base, one end of the base is provided with a connecting disc used for being fixedly arranged on the Christmas tree, the side part of the connecting disc is provided with a core shaft extending forwards, and the core shaft is used for being inserted into a fluid cavity of the Christmas tree. A pressure sensor and a temperature sensor are fixedly mounted at the end part of the mandrel, a buffer cover is fixedly mounted at the end part of the mandrel, the buffer cover covers the pressure sensor and the temperature sensor, and sieve pores are distributed in the buffer cover; a data processing module is arranged in the base and used for obtaining data collected by the pressure sensor and the temperature sensor and transmitting the data to external equipment. The Christmas tree internal fluid pressure and temperature measuring device has the advantages of being capable of directly and accurately measuring the pressure and temperature of fluid inside a Christmas tree.

Description

Technical Field

[0001] This utility model relates to the field of deep-sea oil production technology, specifically to a temperature and pressure detection device for use in underwater oil wells. Background Technology

[0002] The wellhead is a device used in flowing wells and mechanically operated wells to extract oil. It is the main equipment at the top of the oil and gas well for controlling and regulating oil and gas production. As a critical hub at the wellhead, the temperature and pressure data of the fluids inside the well play a decisive role in the safe production and efficient operation of the oil well.

[0003] However, related products are currently scarce on the market, especially detection devices capable of simultaneously measuring the fluid pressure and temperature inside the wellhead, posing a significant challenge to the accurate and efficient monitoring of wellhead temperature and pressure. Because the wellhead is located in a harsh environment characterized by high temperature, high pressure, strong vibration, and corrosion, the use of conventional thermometers and pressure sensors is limited. Furthermore, existing temperature and pressure measurement devices are generally cumbersome to install and maintain, requiring substantial human and material resources, greatly increasing the cost and complexity of oil production operations. Utility Model Content

[0004] In view of this, the present invention provides a temperature and pressure detection device for use in underwater wellheads, which can directly and accurately measure the pressure and temperature of the fluid inside the wellhead.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A temperature and pressure detection device for use in underwater wellheads, the key features of which are: a base, one end of which has a connecting plate for fixed installation on the wellhead, a forward-extending mandrel on the side of the connecting plate for insertion into the fluid cavity of the wellhead, a pressure sensor and a temperature sensor fixedly installed at the end of the mandrel, a buffer cover fixedly installed at the end of the mandrel, the buffer cover covering the pressure sensor and the temperature sensor, and the buffer cover having sieve holes distributed on it;

[0007] The base is equipped with a data processing module, which is used to acquire data collected by the pressure sensor and temperature sensor and transmit the data to external devices.

[0008] With the above structure, when the mandrel is inserted into the fluid chamber of the wellhead A, the fluid inside the chamber can contact the pressure and temperature sensors through the sieve holes on the buffer cover. The pressure and temperature sensors can directly and accurately contact the liquid inside the chamber to obtain the fluid's pressure and temperature values, ensuring data accuracy. The data detected by the pressure and temperature sensors can be transmitted to the data processing module, which can quickly and accurately transmit the detected data to external devices, assisting staff in real-time data monitoring and analysis. Furthermore, the buffer cover located at the end of the mandrel effectively buffers the impact of the fluid on the detection device, preventing sensor damage caused by direct impact from high-speed, high-pressure fluid, thus enhancing the reliability of the detection device.

[0009] Preferably, the buffer cover is a cover body fixed to the end of the spindle, with a gap between the cover body and the end of the spindle, and the sieve holes are distributed on the side of the cover body. This structure effectively disperses and mitigates the impact force of the fluid, thus protecting the pressure sensor and temperature sensor.

[0010] Preferably, the outer side of the mandrel end is provided with a forward-extending annular boss, and the buffer cover is fixedly sleeved on the annular boss. This structure improves the stability of the connection between the buffer cover and the mandrel.

[0011] Preferably, both the pressure sensor and the temperature sensor are provided in two sets. This structure improves the accuracy of temperature and pressure detection by the sensing device.

[0012] Preferably, the connecting plate is a flange with bolt holes. After the mandrel is inserted into the fluid cavity of the wellhead, the flange can be fixed to the side of the wellhead. With this structure, the flange provides a stable and reliable connection and effectively withstands high temperature, high pressure, and strong vibration environments, preventing the detection device from shaking, shifting, or even falling off during detection, ensuring the temperature and pressure detection device remains stable during long-term operation.

[0013] Preferably, the mandrel has a central hole, within which a rubber sleeve is interference-fitted. Both the pressure sensor and temperature sensor are electrically connected to the data processing module via wires that pass through the rubber sleeve. This structure enhances the internal sealing of the mandrel, preventing fluid from entering and damaging components such as the data processing module. Simultaneously, the rubber sleeve provides shock absorption and heat insulation for the wires, thus ensuring the stability and reliability of signal transmission between the sensors and the data processing module.

[0014] Preferably, the base has a hollow cavity structure, with the data processing module located in the center of the cavity structure. The data processing module is connected to a battery cell, and a wet-plug connector is installed at the rear end of the cavity structure, connected to the battery cell. With this structure, the battery cell can provide a stable power supply to the entire detection device, improving the reliability of the equipment, while the wet-plug connector facilitates connection and data transmission between the detection device and external devices.

[0015] Preferably, a sealing gasket is fixedly installed on the cavity structure near the rubber sleeve. The outer circumferential surface of the sealing gasket has a threaded structure, and the wire passes through the sealing gasket. With this structure, during installation, by rotating the sealing gasket, the threaded structure can provide greater friction, allowing the sealing gasket to better conform to the inner wall of the cavity structure, thereby improving the sealing performance.

[0016] Preferably, the cavity structure includes a fixing part, on which the data processing module is fixedly mounted. With this structure, the fixing part effectively prevents the data processing module from shaking or shifting during the operation of the detection device.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The temperature and pressure detection device for subsea wellheads provided by this utility model, by placing pressure and temperature sensors at the ends of a mandrel, allows the sensors to directly and accurately contact the liquid within the wellhead A after the mandrel is inserted, thus obtaining the pressure and temperature values ​​of the fluid and ensuring data accuracy. The data detected by the pressure and temperature sensors is transmitted to a data processing module, which can quickly and accurately transmit the detected data to external devices, assisting staff in real-time data monitoring and analysis.

[0019] 2. The temperature and pressure detection device for underwater oil wells provided by this utility model has a buffer cover at the end of the mandrel that can effectively buffer the impact of fluid on the detection device, avoid damage to the sensor caused by direct impact of high-speed and high-pressure fluid, and enhance the reliability of the detection device.

[0020] 3. The evenly distributed sieve holes on the buffer cover allow the fluid to enter the gap uniformly, avoiding measurement errors caused by local impact or uneven flow of the fluid, which helps to improve the accuracy and stability of pressure and temperature measurements. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the temperature and pressure detection device.

[0022] Figure 2This is a cross-sectional view of a temperature and pressure detection device;

[0023] Figure 3 This is a three-dimensional sectional view of a temperature and pressure detection device;

[0024] Figure 4 This is an exploded view of the spindle 2 and the buffer cover 22;

[0025] Figure 5 An exploded view of the sealing gasket 7, the fixing part 12, and the data processing module 5;

[0026] Figure 6 A three-dimensional sectional view showing the internal structure of the front end of mandrel 2;

[0027] Figure 7 This is a reference diagram showing the operational status of the temperature and pressure detection device. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0029] like Figure 1 The illustrated temperature and pressure detection device for use in underwater wellheads includes a base 1. For ease of explanation, the base 1 has a front end and a rear end. The front end of the base 1 has a connecting plate 11 for fixed installation on the wellhead. A forward-extending mandrel 2 is provided on the front side of the connecting plate 11 for insertion into the fluid cavity of the wellhead. Figure 2 It can be seen that a pressure sensor 3 and a temperature sensor 4 are fixedly installed at the front end of the mandrel 2, and a buffer cover 22 is fixedly installed at the end of the mandrel 2, which covers the pressure sensor 3 and the temperature sensor 4. Combined with... Figure 4 As shown, the buffer cover 22 has sieve holes 221 distributed on it. When the mandrel 2 is inserted into the fluid chamber of the oil well tree, the fluid in the fluid chamber can come into contact with the pressure sensor 3 and the temperature sensor 4 through the sieve holes 221 on the buffer cover 22. The base 1 is equipped with a data processing module 5, which can acquire the data collected by the pressure sensor 3 and the temperature sensor 4 and transmit the data to external devices.

[0030] Combination Figure 7As shown, the temperature and pressure detection device provided in this embodiment, by placing the pressure sensor 3 and temperature sensor 4 at the end of the mandrel 2, allows the pressure sensor 3 and temperature sensor 4 to directly and accurately contact the liquid in the fluid cavity A1 after the mandrel 2 is inserted into the oil well A, thereby obtaining the pressure and temperature values ​​of the fluid and ensuring data accuracy. The data detected by the pressure sensor 3 and temperature sensor 4 can be transmitted to the data processing module 5, which can quickly and accurately transmit the detected data to external devices, assisting staff in real-time monitoring and analysis of the data. In addition, the buffer cover 22 located at the end of the mandrel 2 can effectively buffer the impact force of the fluid on the detection device, avoiding damage to the sensors caused by direct impact from high-speed, high-pressure fluid, and enhancing the reliability of the detection device.

[0031] Furthermore, such as Figure 2 and Figure 4 As shown, the buffer cover 22 is constructed as a cover structure, which is laser-welded to the front end of the mandrel 2. Screen holes 221 are evenly distributed on the front surface of the cover body. A gap a exists between the cover body and the end of the mandrel 2. During detection, the fluid passes through each screen hole 221 into gap a before contacting the pressure sensor 3 and temperature sensor 4. This structural design effectively disperses and mitigates the impact force of the fluid, thus protecting the pressure sensor 3 and temperature sensor 4. Furthermore, the evenly distributed screen holes 221 allow the fluid to enter gap a uniformly, avoiding measurement errors caused by localized impacts or uneven flow, thereby improving the accuracy and stability of pressure and temperature measurements.

[0032] Furthermore, refer to Figure 2 and Figure 4 As shown, the mandrel 2 has a forward-extending annular boss 23 on its outer front end. The buffer cover 22 is fitted onto the annular boss 23 and fixed to it by bolts or other fasteners. This design improves the stability of the connection between the buffer cover 22 and the mandrel 2, and also makes the installation and removal of the buffer cover 22 more convenient.

[0033] To improve the accuracy of temperature and pressure detection by the detection device, by Figure 6 As can be seen, in this embodiment, there are two sets of both pressure sensor 3 and temperature sensor 4, and the pressure sensor 3 is a pressure diaphragm.

[0034] Please refer to Figure 1 and Figure 7The connecting plate 11 is a flange with bolt holes. After the mandrel 2 is inserted into the fluid chamber A1 of the tree A, the flange can be fixed to the side of the tree A with bolts. This design provides a stable and reliable connection and effectively withstands high temperature, high pressure, and strong vibration environments, preventing the detection device from shaking, shifting, or even falling off during detection, ensuring the temperature and pressure detection device remains stable during long-term operation. At the same time, the flange's connecting surface is equipped with a sealing gasket, thus forming a good seal and preventing fluid leakage from the fluid chamber A1. Furthermore, this connection structure facilitates the installation and disassembly of the detection device.

[0035] Combination Figure 2 and Figure 3 As shown, the mandrel 2 has a central hole 2a, within which a rubber sleeve 6 is interference-fitted. Both the pressure sensor 3 and the temperature sensor 4 are electrically connected to the data processing module 5 via wires b, which pass through the rubber sleeve 6. The rubber sleeve 6 enhances the internal sealing of the mandrel 2, preventing fluid from entering and damaging components such as the data processing module 5. Simultaneously, the rubber sleeve 6 provides shock absorption and heat insulation for the wires b, thereby ensuring the stability and reliability of signal transmission between the sensors and the data processing module 5.

[0036] like Figure 2 As shown, the base 1 has a hollow cavity structure 1a. The data processing module 5 is located in the middle of the cavity structure 1a and is connected to a battery cell 52. A wet-plug connector 8 is installed at the rear end of the cavity structure 1a and is connected to the battery cell 52. This design allows the battery cell 52 to provide a stable power supply for the entire detection device, improving the reliability of the equipment. The wet-plug connector 8 facilitates connection and data transmission between the detection device and external devices. The overall structure has the advantages of reasonable layout and good stability.

[0037] For example Figure 2 As shown, a sealing gasket 7 is fixedly installed in cavity structure 1a near the rubber sleeve 6. The wire b can pass through the sealing gasket 7, which prevents fluid from entering the cavity from the front end. Figure 5 As can be seen, in this embodiment, the outer circumferential surface of the sealing gasket 7 is provided with a threaded structure 71. During installation, by rotating the sealing gasket 7, the threaded structure 71 can provide greater friction, so that the sealing gasket 7 can better fit the inner wall of the cavity structure 1a, thereby improving the sealing performance.

[0038] Revisit Figure 3 and 5The cavity structure 1a is equipped with a fixing part 12, on which the data processing module 5 is fixedly mounted. This design effectively prevents the data processing module 5 from shaking or shifting during the operation of the detection device, ensuring that the data processing module 5 can continuously and stably process and transmit signals from the sensor, thereby guaranteeing the accuracy and reliability of the measurement data from the detection device.

[0039] For details, please refer to Figure 5 The fixing part 12 is constructed into a cylindrical structure. The inner wall of the fixing part 12 has protruding slots 121. Each data processing module 5 corresponds to two sets of slots 121, which are symmetrically distributed on the inner wall of the fixing part 12. The data processing module 5 can be inserted into the slots 121 at both ends. In this embodiment, there are two data processing modules 5, and four sets of slots 121 are provided, corresponding one-to-one. The two data processing modules 5 are arranged in parallel.

[0040] Furthermore, such as Figure 5 As shown, the sealing gasket 7 has a groove structure 72 at one end facing the fixing part 12, which is combined with Figure 3 As shown, after the data processing module 5 is inserted into the slot 121, its front end rests on the groove structure 72. The groove structure 72 provides additional support for the data processing module 5, preventing it from detaching from the fixing part 12 and enhancing the stability of its installation. Furthermore, the groove structure 72 also acts as a buffer to some extent, protecting the data processing module 5 from damage and improving the reliability and stability of the detection device.

[0041] In this embodiment, the fixing part 12 is made of metal material, so the fixing part 12 has good thermal conductivity and can help the data processing module 5 dissipate heat.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A temperature and pressure detection device applied to a subsea Christmas tree, characterized in that: The base (1) has a connecting disc (11) at one end for fixing installation on the Christmas tree, the connecting disc (11) is provided with a forwardly extending mandrel (2) at the side, the mandrel (2) is used for inserting into the fluid cavity of the Christmas tree, the mandrel (2) is fixedly installed with a pressure sensor (3) and a temperature sensor (4) at the end, the mandrel (2) is fixedly installed with a buffer cover (22) at the end, the buffer cover (22) covers the pressure sensor (3) and the temperature sensor (4), and the buffer cover (22) is distributed with sieve holes (221). The base (1) is internally provided with a data processing module (5), which is used for acquiring data collected by the pressure sensor (3) and the temperature sensor (4) and transmitting the data to an external device.

2. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 1, characterized in that: The buffer cover (22) is a cover body fixedly arranged at the end of the mandrel (2), and a gap (a) exists between the cover body and the end of the mandrel (2), and the sieve holes (221) are distributed at the side of the cover body.

3. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 2, characterized in that: The mandrel (2) is provided with a forwardly extending annular boss (23) outside the end, and the buffer cover (22) is fixedly sleeved on the annular boss (23).

4. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 1, characterized in that: The pressure sensor (3) and the temperature sensor (4) are each provided with two groups.

5. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 1, characterized in that: The connecting disc (11) is a flange disc, which is distributed with bolt holes, and when the mandrel (2) is inserted into the fluid cavity of the Christmas tree, the flange disc can be fixed at the side of the Christmas tree.

6. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 1, characterized in that: The mandrel (2) has a central hole (2a), the rubber sleeve (6) is interference-fitted in the central hole (2a), the pressure sensor (3) and the temperature sensor (4) are electrically connected with the data processing module (5) through wires (b), and the wires (b) penetrate through the rubber sleeve (6).

7. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 6, characterized in that: The base (1) has an internally hollow cavity structure (1a), the data processing module (5) is located in the middle of the cavity structure (1a), the data processing module (5) is connected with an electric core (52), the cavity structure (1a) is provided at the rear end with a wet plug-in electric connector (8), and the wet plug-in electric connector (8) is connected to the electric core (52).

8. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 7, characterized in that: The cavity structure (1a) is fixedly installed with a sealing gasket (7) at a position close to the rubber sleeve (6), the outer circumferential surface of the sealing gasket (7) is provided with a threaded structure (71), and the wires (b) penetrate through the sealing gasket (7).

9. The temperature and pressure detection device for use in a subsea Christmas tree according to claim 7, characterized in that: The cavity structure (1a) is provided with a fixing portion (12), and the data processing module (5) is fixedly assembled on the fixing portion (12).

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