Pressure testing device, pressure testing system and pressure testing method

Abstract

The present invention discloses a pressure testing device, a pressure testing system, and a pressure testing method, which relate to the field of deepwater oil and gas development technology. The pressure testing device includes: an oil and gas medium testing piece, the oil and gas medium testing piece having a first end face and a second end face. The first end face is provided with a receiving hole for accommodating a pressure sensor receiving mechanism of an underwater integrated pressure and temperature transmitter, and the first end face is also provided with a plurality of first threaded holes. The first end face also has a first annular groove, the first annular groove being located between the first threaded hole and the receiving hole, and a first sealing member disposed in the first annular groove, the first sealing member being configured to abut against the electronic compartment receiving mechanism of the underwater integrated pressure and temperature transmitter. The oil and gas medium testing piece is provided with a first interface and a fourth interface communicating with the receiving hole, etc. This application enables environmental pressure testing and oil and gas medium pressure testing of the underwater integrated pressure and temperature transmitter to be performed.

Description

Technical Field

[0001] The present invention relates to the technical field of deepwater oil and gas development, and in particular to a pressure testing device, a pressure testing system and a pressure testing method. Background Art

[0002] Subsea production systems are crucial equipment for developing offshore oil and gas resources and are widely used in deepwater and marginal oilfield development. Subsea production systems include subsea oil and gas production equipment (such as subsea Christmas trees and manifolds), as well as surface monitoring and gathering equipment. Subsea pressure and temperature transmitters (PTTTs) are installed on subsea production equipment to provide real-time pressure and temperature information for subsea oil and gas process media. Because subsea oil and gas production equipment operates in high-pressure, highly corrosive seawater environments for extended periods, installation and maintenance are costly, risky, and time-consuming. To ensure continuous and safe production and reduce maintenance costs, helium leak and pressure testing are required before installing PTTTs. Helium leak testing verifies the functional integrity of seals and pressure sensor seals that connect the PTTT to the external seawater environment, checking for any micro-leakage. Pressure testing includes both ambient and oil / gas medium pressure testing, as well as communication testing of the PTTT during the pressure test.

[0003] Deepwater oil and gas field development requires underwater production systems. Various manufacturers provide general engineering contracts and do not sell control systems and related equipment separately. The PTTT is a core component of the underwater production system, operating in high-pressure, highly corrosive seawater. It transmits oil and gas production pressure and temperature data in real time to a subsea control module (SCM). The SCM transmits this data via an umbilical cable to a surface control station, where engineers monitor the status of oil and gas production in real time. The performance of the PTTT directly determines the safe operation of underwater oil and gas production equipment (such as subsea Christmas trees and manifolds). Currently, the development and functional testing of the PTTT has been slow, primarily due to a lack of testing equipment capable of performing helium leak tests and simultaneous testing of the PTTT's operating environment pressure and oil and gas medium pressure. For example, existing high-pressure chambers designed to simulate underwater environments can only perform operating environment pressure tests to verify the PTTT's pressure resistance and sealing at specific water depths. The seawater pressure of the PTTT differs significantly from the oil and gas medium pressure, making it impossible to simultaneously conduct oil and gas medium pressure tests during external pressure testing. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a pressure testing device, a pressure testing system and a pressure testing method, which can perform environmental pressure testing and oil and gas medium pressure testing on an underwater pressure and temperature integrated transmitter.

[0005] The specific technical solution of the embodiment of the present invention is:

[0006] A pressure testing device for an underwater pressure-temperature integrated transmitter, the pressure testing device for an underwater pressure-temperature integrated transmitter comprising:

[0007] An oil-gas medium test piece, the oil-gas medium test piece having a first end face and a second end face opposite to each other, a receiving hole for receiving a pressure sensor receiving mechanism of an underwater pressure and temperature integrated transmitter being provided on the first end face, a plurality of first threaded holes being provided on the first end face, the plurality of first threaded holes being distributed circumferentially around the receiving hole; a first annular groove being provided on the first end face, the first annular groove being located between the first threaded hole and the receiving hole, a first sealing member being provided in the first annular groove, the first sealing member being used to abut against the electronic compartment receiving mechanism of the underwater pressure and temperature integrated transmitter, a first interface and a fourth interface being provided on the oil-gas medium test piece, which are in communication with the receiving hole;

[0008] An environmental pressure testing mechanism, the environmental pressure testing mechanism having a accommodating chamber, the accommodating chamber being used to accommodate an electronic compartment accommodating mechanism of an underwater pressure and temperature integrated transmitter; the environmental pressure testing mechanism can be sealedly connected to the first end face of the oil and gas medium testing piece, and the environmental pressure testing mechanism has a second interface connected to the accommodating chamber, a third interface connected to the accommodating chamber, and an electrical interface.

[0009] Preferably, a plurality of second threaded holes are further formed on the first end surface, and the plurality of second threaded holes are distributed in a circumference around the receiving hole, and the second threaded holes are located outside the first threaded hole;

[0010] The environmental pressure testing mechanism includes: a cylinder and an end cover that seals one end of the cylinder, the other end of the cylinder has a first outer edge, and a first through hole is opened on the first outer edge; the first through hole cooperates with the second threaded hole through a bolt to connect the cylinder and the oil and gas medium testing piece together; a second annular groove is provided on the end surface of the other end of the cylinder, and a second sealing member is provided in the second annular groove.

[0011] Preferably, one end of the cylinder has a second outer edge, and a plurality of second through holes are provided on the second outer edge; the end cover has a third through hole corresponding to the second through hole, and the second through hole cooperates with the third through hole through a bolt to connect the cylinder and the end cover together; one end of the cylinder has a third annular groove at the contact point with the end cover, and a third sealing member is provided in the third annular groove.

[0012] Preferably, the second interface, the third interface and the electrical interface are located on the end cover, and the end cover is in a flat plate shape;

[0013] An electrical connector is provided in the electrical interface, and the electrical connector is located on one side of the end cover forming the accommodating chamber, and a pressing member is connected to the side of the end cover forming the accommodating chamber for pressing the electrical connector toward the other side of the end cover;

[0014] The clamping piece has a through hole, and the through hole and the electrical interface both have a step structure. The through hole accommodates part of the electrical connector and presses against the electrical connector through the step structure, and the electrical interface accommodates part of the electrical connector and presses against the electrical connector through the step structure; the clamping piece is connected to the end cover by bolts.

[0015] Preferably, the second end surface is provided with the first interface connected to the accommodating hole; the fourth interface is located on the side wall of the oil and gas medium testing piece, and the fourth interface is connected to the accommodating hole through a connecting hole.

[0016] A pressure testing system for an underwater pressure-temperature integrated transmitter, the pressure testing system for an underwater pressure-temperature integrated transmitter comprising:

[0017] A pressure testing device for an underwater integrated pressure and temperature transmitter as described above;

[0018] A helium output unit; a first processing unit comprising a vacuum pump, an on-off valve having one end connected to the inlet of the vacuum pump, a three-way valve, and a helium mass spectrometer, wherein a first end of the three-way valve is connected to the other end of the on-off valve, and a second end of the three-way valve is connected to the helium mass spectrometer;

[0019] The pressure testing system for an underwater integrated pressure and temperature transmitter includes a first state, in which the helium output unit can be connected to the second interface or the third interface, and the third end of the three-way valve of the first processing unit can be connected to the first interface or the fourth interface;

[0020] The pressure testing system for the underwater integrated pressure and temperature transmitter includes a second state. In the second state, the helium output unit can be connected to the first interface or the fourth interface, and the third end of the three-way valve of the first processing unit can be connected to the second interface or the third interface.

[0021] Preferably, the pressure testing system for the underwater integrated pressure and temperature transmitter further comprises:

[0022] an oil-gas medium output unit, which can be connected to the first interface or the fourth interface, and can output colored oil-gas medium at a first preset pressure and maintain the pressure, wherein the oil-gas medium has a color;

[0023] A high-pressure fluid power device comprising a housing, a liquid supply circuit and a liquid return circuit respectively connectable to the second interface and the third interface, the liquid supply circuit and the liquid return circuit being connectable to the housing, the liquid supply circuit of the high-pressure fluid power device being capable of outputting seawater having a second preset pressure and maintaining the pressure, and the liquid return circuit of the high-pressure fluid power device being capable of inputting recovered liquid into the housing, wherein the liquid is a transparent and colorless liquid;

[0024] The pressure testing system for the underwater integrated pressure and temperature transmitter includes a third state. In the third state, the oil and gas medium output unit is connected to the first interface or the fourth interface, and the liquid supply line and the liquid return line of the high-pressure fluid power device are respectively connected to the second interface and the third interface.

[0025] A pressure testing method using the pressure testing system for the underwater pressure-temperature integrated transmitter as described above, the pressure testing method comprising:

[0026] Installing an underwater integrated pressure and temperature transmitter into a pressure testing device for an underwater integrated pressure and temperature transmitter, wherein the pressure sensor accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating hole, and the electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating chamber. The electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole of the oil and gas medium test piece via a bolt, and a first sealing member seals the electronic compartment accommodating mechanism and the oil and gas medium test piece. The pressure sensor accommodating mechanism is opened to connect its interior to the accommodating hole.

[0027] Switching the pressure test system for the underwater pressure and temperature integrated transmitter to a first state;

[0028] Opening the on-off valve of the first processing unit, evacuating the receiving hole with a vacuum pump, and then closing the on-off valve;

[0029] Helium is input into the containing chamber through a helium output unit, and then the detection result of the helium mass spectrometer is observed to determine whether there is leakage in the electronic cabin containing mechanism.

[0030] A pressure testing method using the pressure testing system for the underwater pressure-temperature integrated transmitter as described above, the pressure testing method comprising:

[0031] An underwater integrated pressure and temperature transmitter is installed in a pressure testing device for an underwater integrated pressure and temperature transmitter, wherein the pressure sensor accommodation mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodation hole, and the electronic compartment accommodation mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodation chamber. The flange of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole of the oil and gas medium test piece via bolts, and a first sealing member seals the electronic compartment accommodation mechanism and the oil and gas medium test piece. The electronic compartment accommodation mechanism is opened to connect its interior with the accommodation chamber.

[0032] Switching the pressure test system for the underwater pressure and temperature integrated transmitter to a second state;

[0033] Opening the on-off valve of the first processing unit, evacuating the containing chamber using a vacuum pump, and then closing the on-off valve;

[0034] Helium is input into the accommodating hole through a helium output unit, and then the detection result of the helium mass spectrometer is observed to determine whether there is leakage in the pressure sensor accommodating mechanism.

[0035] A pressure testing method using the pressure testing system for the underwater pressure-temperature integrated transmitter as described above, the pressure testing method comprising:

[0036] The underwater integrated pressure and temperature transmitter is installed in a pressure testing device for the underwater integrated pressure and temperature transmitter, wherein the pressure sensor accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating hole, and the electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating chamber. The underwater integrated pressure and temperature transmitter is electrically connected to the electrical connector, and the electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole of the oil and gas medium test piece via a bolt. A first sealing member seals the electronic compartment accommodating mechanism and the oil and gas medium test piece;

[0037] Electrically connecting the electrical test unit to the electrical connector in the electrical interface;

[0038] injecting oil and gas into the receiving hole through the oil and gas medium output unit, and maintaining the pressure after the pressure increases to a first preset pressure;

[0039] injecting liquid into the receiving chamber through the liquid supply circuit and the liquid return circuit of the high-pressure fluid power device until the liquid in the liquid return circuit flows into the box body, then closing the liquid return circuit, and maintaining the pressure when the pressure of the liquid supply circuit increases to a second preset pressure;

[0040] After the first preset pressure and the second preset pressure are stabilized, the liquid return path is opened to allow the liquid in the accommodating chamber to flow back into the box body, and the accommodating hole is depressurized through the oil and gas medium output unit;

[0041] By observing whether the liquid in the box has the color of the oil and gas medium, it is judged whether the seal between the underwater pressure and temperature integrated transmitter and the oil and gas medium test piece is good; at the same time, it is monitored whether the communication between the electrical test unit and the underwater pressure and temperature integrated transmitter is good;

[0042] The above-mentioned pressure relief operation and pressurization operation are repeated for multiple cycles, and then the pressure maintaining stage is entered. After the pressure time reaches the preset time, the underwater pressure and temperature integrated transmitter is removed and opened to check whether there is any liquid leakage inside.

[0043] The technical solution of the present invention has the following significant beneficial effects:

[0044] 1. This application can use a closed-loop negative feedback control scheme to simultaneously inject liquid and oil-gas medium into the environmental pressure test mechanism and the oil-gas medium test piece according to the environmental pressure and oil-gas medium pressure when the underwater pressure and temperature integrated transmitter is working, and adjust the oil-gas medium pressure and environmental pressure by the first preset pressure output by the oil-gas medium output unit and the second preset pressure output by the high-pressure fluid power device. Since the environmental pressure test uses a colorless liquid and the oil-gas medium uses a colored oil-gas medium, if the liquid in the box is colored, it means that the seal at the first seal between the flange of the underwater pressure and temperature integrated transmitter and the oil-gas medium test piece has failed, otherwise it means that the seal at the first seal is good; by checking whether there is liquid or oil-gas medium penetration inside the underwater pressure and temperature integrated transmitter, it is possible to detect whether the sealing of the underwater pressure and temperature integrated transmitter is good. At the same time, in the process of testing the oil-gas medium pressure and environmental pressure of the underwater pressure and temperature integrated transmitter, it is also possible to test whether the communication continuity between the underwater pressure and temperature integrated transmitter and the outside world is good.

[0045] 2. The present application can also utilize the helium output unit and the first processing unit to simultaneously perform a helium leak test on the underwater integrated pressure and temperature transmitter to detect whether there are micro-leaks in the seals of the outer shell mechanisms of the pressure sensor accommodating mechanism and the electronic compartment accommodating mechanism, and can specifically detect which of the outer shell mechanisms of the pressure sensor accommodating mechanism and the electronic compartment accommodating mechanism has micro-leaks in the seals, thereby ensuring the integrity of the sealing function test of the sealing machine of the underwater integrated pressure and temperature transmitter.

[0046] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0048] Figure 1 This is a cross-sectional structural diagram of a pressure testing device equipped with an underwater integrated pressure and temperature transmitter according to an embodiment of the present invention;

[0049] Figure 2 Schematic diagram of a first end surface of an oil and gas medium test piece in an embodiment of the present invention;

[0050] Figure 3 Schematic diagram of the second end surface of the oil and gas medium test piece in an embodiment of the present invention;

[0051] Figure 4 for Figure 2 Cross-section at AA in the middle;

[0052] Figure 5 is a cross-sectional view of an environmental pressure testing mechanism according to an embodiment of the present invention;

[0053] Figure 6 for Figure 5 Left side view of the medium environment pressure test mechanism;

[0054] Figure 7 for Figure 5 Right side view of the medium environment pressure test mechanism;

[0055] Figure 8 is a cross-sectional view of a pressing member in an embodiment of the present invention;

[0056] Figure 9 for Figure 8 Left side view of the middle pressing piece;

[0057] Figure 10 for Figure 8 Right side view of the middle pressing piece;

[0058] Figure 11 2 is a schematic structural diagram of a pressure testing system for an underwater integrated pressure and temperature transmitter in a first state according to an embodiment of the present invention;

[0059] Figure 12 2 is a schematic structural diagram of a pressure testing system for an underwater integrated pressure and temperature transmitter in a second state according to an embodiment of the present invention;

[0060] Figure 13 Schematic diagram of the structure of the pressure testing system for the underwater integrated pressure and temperature transmitter in the third state according to an embodiment of the present invention.

[0061] Reference numerals in the above drawings:

[0062] 1. Oil and gas medium test piece; 11. Accommodation hole; 12. First threaded hole; 13. First annular groove; 14. First sealing member; 15. First interface; 17. Second threaded hole; 18. Third threaded hole; 2. Environmental pressure test mechanism; 21. Accommodation chamber; 22. Second interface; 23. Third interface; 24. Electrical interface; 25. End cover; 26. Cylinder; 27. First outer edge; 271. First through hole; 28. Second annular groove; 29. ​​Second sealing member; 210. Second outer edge; 2101. Second through hole Perforation; 211, third annular groove; 212, third sealing member; 213, electrical connector; 214, pressing member; 2141, through hole; 215, third through hole; 3, helium output unit; 4, first processing unit; 41, vacuum pump; 42, on-off valve; 43, three-way valve; 44, helium mass spectrometer; 5, oil and gas medium output unit; 6, high-pressure fluid power device; 7, handle; 8, base; 9, electrical test unit; 101, electronic compartment accommodating mechanism; 102, flange; 103, pressure sensor accommodating mechanism. DETAILED DESCRIPTION

[0063] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for illustrative purposes only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, all of which should be considered within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, internal communication between two elements, direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0065] In order to carry out environmental pressure testing and oil and gas medium pressure testing on the underwater pressure and temperature integrated transmitter, a pressure testing device for the underwater pressure and temperature integrated transmitter is proposed in this application. Figure 1 FIG. 1 is a cross-sectional structural diagram of a pressure testing device equipped with an underwater pressure and temperature integrated transmitter according to an embodiment of the present invention. Figure 1As shown, the pressure testing device for an underwater pressure and temperature integrated transmitter may include: an oil and gas medium test piece 1, the oil and gas medium test piece 1 having a first end face and a second end face opposite to each other, a receiving hole 11 for receiving a pressure sensor receiving mechanism 103 of an underwater pressure and temperature integrated transmitter is provided on the first end face, a plurality of first threaded holes 12 are further provided on the first end face, and the plurality of first threaded holes 12 are distributed circumferentially around the receiving hole 11; a first annular groove 13 is further provided on the first end face, the first annular groove 13 is located between the first threaded hole 12 and the receiving hole 11, a first sealing member 14 is provided in the first annular groove 13, and the first sealing member 14 is provided in the first annular groove 13. The seal 14 is used to abut against the electronic compartment accommodating mechanism 101 of the underwater integrated pressure and temperature transmitter. The oil and gas medium test piece 1 is provided with a first interface 15 and a fourth interface connected to the accommodating hole 11; the environmental pressure test mechanism 2, the environmental pressure test mechanism 2 has a accommodating chamber 21, and the accommodating chamber 21 is used to accommodate the electronic compartment accommodating mechanism 101 of the underwater integrated pressure and temperature transmitter; the environmental pressure test mechanism 2 can be sealed and connected to the first end face of the oil and gas medium test piece 1, and the environmental pressure test mechanism 2 has a second interface 22 connected to the accommodating chamber 21, a third interface 23 connected to the accommodating chamber 21 and an electrical interface 24.

[0066] Figure 2 Schematic diagram of the first end surface of the oil and gas medium test piece in an embodiment of the present invention, Figure 3 Schematic diagram of the second end surface of the oil and gas medium test piece in an embodiment of the present invention, Figure 4 for Figure 2 The cross-sectional view at AA in the middle is as follows: Figures 1 to 4 As shown, the oil-gas medium test piece 1 has a certain thickness, and has a first end face and a second end face relative to each other. The oil-gas medium test piece 1 can be made of a metal material with relatively high strength, such as steel. A receiving hole 11 for receiving the pressure sensor receiving mechanism 103 of the underwater pressure and temperature integrated transmitter can be provided in the middle of the first end face, and the receiving hole 11 can be perpendicular to the first end face. A plurality of first threaded holes 12 are also provided on the first end face, and the plurality of first threaded holes 12 are distributed in a circle around the receiving hole 11. The underwater pressure and temperature integrated transmitter can include a flange 102 with a connecting channel, a pressure sensor receiving mechanism 103 sealedly mounted on one side of the flange 102, and an electronic compartment receiving mechanism 101 sealedly mounted on the other side of the flange 102, and the interior of the pressure sensor receiving mechanism 103 is connected to the interior of the electronic compartment receiving mechanism 101 through a connecting channel.

[0067] When the underwater integrated pressure and temperature transmitter is installed on the pressure testing device, the bolts are inserted into the flange 102 of the underwater integrated pressure and temperature transmitter and then screwed into the first threaded hole 12, that is, the two are connected through the flange structure, thereby realizing a sealed connection between the underwater integrated pressure and temperature transmitter and the oil and gas medium test piece 1.

[0068] In order to improve the sealing between the underwater pressure and temperature integrated transmitter and the oil and gas medium test piece 1, Figure 1 、 Figure 2 、 Figure 4 As shown, the first end surface also has a first annular groove 13, which is located between the first threaded hole 12 and the receiving hole 11. A first seal 14 is provided in the first annular groove 13, and the first seal 14 is used to abut against the flange 102 of the underwater pressure and temperature integrated transmitter. When the underwater pressure and temperature integrated transmitter is installed on the pressure testing device, when the bolts are inserted into the flange 102 of the underwater pressure and temperature integrated transmitter and then screwed into the first threaded hole 12 to be locked, the flange 102 of the underwater pressure and temperature integrated transmitter can press the first seal 14, thereby achieving an efficient seal between the flange 102 of the underwater pressure and temperature integrated transmitter and the first end surface of the oil and gas medium test piece 1, preventing the receiving chamber 21 of the environmental pressure testing mechanism 2 from leaking through the gap between the flange 102 of the underwater pressure and temperature integrated transmitter and the first end surface of the oil and gas medium test piece 1 and thus the receiving hole 11.

[0069] Since the pressure value tested during the pressure test by the pressure testing device is very high, the first seal 14 needs to have high strength. As a feasible option, the first seal 14 can be a standard flange gasket made of 316L material. At the same time, the surface of the first seal 14 can have an isolation layer and a protective layer attached to the surface of the isolation layer. The isolation layer can be a film or a coating, and the material can be PTFE, polyester or polyimide. The main function of the isolation layer is to isolate the first seal from the contact between the chemical medium to prevent the chemical medium from corroding and damaging the gasket. The function of the isolation layer can also include improving the sealing performance of the first seal and preventing leakage. The protective layer can be a coating or a thin layer formed by surface treatment, and the material can be zinc, chrome plating or nickel plating. The main function of the protective layer is to protect the first seal from corrosion and oxidation by the chemical medium and the environment. The protective layer can enhance the durability and life of the first seal and prevent defects and cracks on the surface of the first seal from causing leakage. The isolation layer isolates the oil and gas medium from the external environment. The protective layer contacts the first end surface of the oil and gas medium test piece 1 and the underwater pressure and temperature integrated transmitter, providing a metal seal between the underwater pressure and temperature integrated transmitter and the first end surface of the oil and gas medium test piece 1. The upper and lower surfaces of the isolation layer may be evenly spaced outwardly protruding to form multiple concentric annular sealing bands extending beyond the protective layer.

[0070] The oil and gas medium test piece 1 is provided with a first interface 15 and a fourth interface which are connected to the receiving hole 11. Figure 1 、 Figure 3 and Figure 4As shown, the first interface 15 can be provided on the second end surface of the oil-gas medium test piece 1, located in the middle of the second end surface of the oil-gas medium test piece 1. The fourth interface can be provided on the side wall of the oil-gas medium test piece 1, and the fourth interface is connected to the receiving hole 11 through the communication hole 2141. One of the first interface 15 and the fourth interface can be used to inject helium into the receiving hole 11, and the other can be used to exhaust the gas originally in the receiving hole 11.

[0071] like Figure 1 、 Figure 3 and Figure 4 As shown, a third threaded hole 18 can be formed on the second end surface of the oil and gas medium testing device 1. There can be multiple third threaded holes 18, and the multiple third threaded holes 18 can be distributed circumferentially around the first interface 15. The third threaded holes 18 can be used to securely mount the pressure testing device on other devices for easy transportation and mounting.

[0072] like Figures 1 to 4 As shown, the oil-gas medium test piece 1 can be generally rectangular in shape. A handle 7 can be connected to the upper end surface of the oil-gas medium test piece 1 to facilitate the operator's transportation of the pressure test device. The lower end surface of the oil-gas medium test piece 1 can be connected to a base 8. The base 8 and the lower end surface of the oil-gas medium test piece 1 can be connected by bolts or other bolts. The base 8 is used to balance the weight of the pressure test device to prevent the environmental pressure test mechanism 2 from being too heavy on one end and being unable to be stably placed on the lower end surface of the oil-gas medium test piece 1. The specific weight and size of the base 8 can be customized according to the oil-gas medium test piece 1 and the environmental pressure test mechanism 2.

[0073] Figure 5 is a cross-sectional view of an environmental pressure testing mechanism according to an embodiment of the present invention. Figure 6 for Figure 5 Left view of the medium environment pressure test mechanism, Figure 7 for Figure 5 Right view of the medium environment pressure test mechanism, such as Figure 1 、 Figures 5 to 7As shown, the environmental pressure testing mechanism 2 can be connected to the oil and gas medium test piece 1. The environmental pressure testing mechanism 2 has a housing chamber 21, which is used to accommodate the electronic compartment housing 101 of the underwater pressure and temperature integrated transmitter. To improve the pressure resistance of the environmental pressure testing mechanism 2, the environmental pressure testing mechanism 2 may include a cylinder 26 and an end cap 25 that seals one end of the cylinder 26. The other end of the cylinder 26 has a first outer edge 27, which is provided with a first through-hole 271. The first through-hole 271 engages with the second threaded hole 17 via a bolt to connect the cylinder 26 to the oil and gas medium test piece 1. This method can form the environmental pressure testing mechanism 2 with the housing chamber 21 without the need for welding, which helps to improve the compressive strength of the environmental pressure testing mechanism 2. The other end of the cylinder 26 has a second annular groove 28 on its end surface, and a second sealing member 29 is disposed in the second annular groove 28 to improve the sealing between the cylinder 26 and the oil and gas medium test piece 1.

[0074] like Figure 1 、 Figure 5 and Figure 6 As shown, the environmental pressure test mechanism 2 can be sealedly connected to the first end surface of the oil and gas medium test piece 1. Specifically, one end of the cylinder 26 has a second outer edge 210, which is defined by a plurality of second through-holes 2101. The end cap 25 has third through-holes 215 corresponding to the second through-holes 2101. The second through-holes 2101 engage with the third through-holes 215 via bolts to connect the cylinder 26 and the end cap 25. A third annular groove 211 is defined at the point where one end of the cylinder 26 contacts the end cap 25. A third sealing member 212 is disposed within the third annular groove 211.

[0075] The environmental pressure test mechanism 2 has a second interface 22 communicating with the accommodating chamber 21, a third interface 23 communicating with the accommodating chamber 21, and an electrical interface 24. Figure 5 As shown, the end cover 25 can be in the shape of a flat plate. The second interface 22, the third interface 23, and the electrical interface 24 are located on the end cover 25. Through the above structure, on the one hand, it is easy to open the hole, and on the other hand, it is possible to avoid affecting the pressure resistance of the environmental pressure testing mechanism 2 as much as possible. One of the second interface 22 and the third interface 23 can be used to inject helium into the accommodating chamber 21, and the other can be used to discharge the original gas in the accommodating chamber 21. Alternatively, one can be used to inject pressurized liquid into the accommodating chamber 21, and the other can be used to discharge the original gas and pressurized liquid in the accommodating chamber 21 for pressure relief.

[0076] like Figure 1 and Figure 5As shown, an electrical connector 213 is provided in the electrical interface. The electrical connector 213 is located on one side of the accommodating chamber 21 formed by the end cover 25. A pressing member 214 is connected to the side of the accommodating chamber 21 formed by the end cover 25 for pressing the electrical connector 213 toward the other side of the end cover 25. The pressing member 214 can prevent the electrical connector 213 from being pressed out of the electrical interface and falling into the accommodating chamber 21 under external pressure when the accommodating chamber 21 is evacuated. The electrical connector 213 is used to provide the power supply interface required for the operation of the underwater pressure and temperature integrated transmitter and the communication interface between the underwater pressure and temperature integrated transmitter and the host computer. The host computer may include an electrical test unit 9. Specifically, Figure 8 is a cross-sectional view of a pressing member in an embodiment of the present invention, Figure 9 for Figure 8 Left side view of the middle pressing piece, Figure 10 for Figure 8 The right side view of the middle pressing piece, as shown Figures 8 to 10 As shown, the compression member 214 has a through hole 2141. Both the through hole 2141 and the electrical interface 24 have a stepped structure. The through hole 2141 accommodates a portion of the electrical connector 213 and abuts against the electrical connector 213 via the stepped structure. The electrical interface 24 accommodates a portion of the electrical connector 213 and abuts against the electrical connector 213 via the stepped structure. The compression member 214 can be connected to the end cap 25 via bolts. A sealing ring can be provided between the electrical connector 213 and the electrical interface to ensure sealing. Similarly, a handle 7 can be connected to the end cap 25 to facilitate the operator's transportation of the pressure test device.

[0077] The present application also proposes a pressure testing system for an underwater integrated pressure and temperature transmitter. The pressure testing system for an underwater integrated pressure and temperature transmitter may include: any of the above-mentioned pressure testing devices for an underwater integrated pressure and temperature transmitter; a helium output unit 3; a first processing unit 4, including a vacuum pump 41, an on-off valve 42 connected to the inlet of the vacuum pump 41 at one end, a three-way valve 43, and a helium mass spectrometer 44, wherein the first end of the three-way valve 43 is connected to the other end of the on-off valve 42, and the second end of the three-way valve 43 is connected to the helium mass spectrometer 44.

[0078] Figure 11 FIG. 1 is a structural diagram of a pressure testing system for an underwater integrated pressure and temperature transmitter in a first state according to an embodiment of the present invention. Figure 11 As shown, the pressure testing system for the underwater integrated pressure and temperature transmitter includes a first state. In the first state, the helium output unit 3 can be connected to the second interface 22 or the third interface 23, and the third end of the three-way valve 43 of the first processing unit 4 can be connected to the first interface 15 or the fourth interface.

[0079] Figure 12FIG. 1 is a structural diagram of a pressure testing system for an underwater integrated pressure and temperature transmitter in a second state according to an embodiment of the present invention. Figure 12 As shown, the pressure testing system for the underwater integrated pressure and temperature transmitter includes a second state. In the second state, the helium output unit 3 can be connected to the first interface 15 or the fourth interface, and the third end of the three-way valve 43 of the first processing unit 4 can be connected to the second interface 22 or the third interface 23.

[0080] The pressure testing system can perform helium leak tests on underwater integrated pressure and temperature transmitters. In its first state, the pressure testing system can be used to test the sealing performance of the electronics compartment housing 101 within the transmitter, such as whether seal A within the housing of the electronics compartment housing 101 is properly sealed. In its second state, the pressure testing system can be used to test the sealing performance of the pressure sensor housing 103 within the transmitter, such as whether seal B within the housing of the pressure sensor housing 103 is properly sealed.

[0081] As feasible, Figure 13 FIG. 1 is a structural diagram of a pressure testing system for an underwater integrated pressure and temperature transmitter in a third state according to an embodiment of the present invention. Figure 13 As shown, a pressure testing system for an underwater integrated pressure and temperature transmitter may include: an oil-gas medium output unit 5, which can be connected to the first interface 15 or the fourth interface. The oil-gas medium output unit 5 can output a colored oil-gas medium at a first preset pressure and maintain the pressure; a high-pressure fluid power device 6, which has a housing, a liquid supply line and a liquid return line, which can be connected to the second interface 22 and the third interface 23, respectively. The liquid supply line and the liquid return line can be connected to the housing. The liquid supply line of the high-pressure fluid power device 6 can output seawater at a second preset pressure and maintain the pressure. The liquid return line of the high-pressure fluid power device 6 can input recovered liquid into the housing. The liquid is a transparent and colorless liquid. The oil-gas medium can be a dark color, such as black, so that a small amount of oil-gas medium can be identified after entering the transparent and colorless liquid. The transparent and colorless liquid can be seawater to suit the actual application environment of the underwater integrated pressure and temperature transmitter.

[0082] The pressure testing system for the underwater integrated pressure and temperature transmitter includes a third state. In the third state, the oil and gas medium output unit 5 is connected to the first interface 15 or the fourth interface, and the liquid supply line and the liquid return line of the high-pressure fluid power device 6 are respectively connected to the second interface 22 and the third interface 23.

[0083] Through the above structure, the pressure testing system can perform pressure testing on the underwater integrated pressure and temperature transmitter. On the one hand, it can confirm whether the underwater integrated pressure and temperature transmitter and the first end face of the oil and gas medium test piece 1 of the pressure testing device are well sealed during installation. On the other hand, it can test the environmental sealing of the underwater integrated pressure and temperature transmitter.

[0084] This application proposes a pressure testing method for a pressure testing system. The pressure testing method may include:

[0085] The underwater integrated pressure and temperature transmitter is installed in a pressure testing device for the underwater integrated pressure and temperature transmitter. The pressure sensor accommodating mechanism 103 of the underwater integrated pressure and temperature transmitter is located in the accommodating hole 11, and the electronic compartment accommodating mechanism 101 of the underwater integrated pressure and temperature transmitter is located in the accommodating chamber 21. The flange 102 of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole 12 of the oil and gas medium test piece 1 through bolts. The first sealing member 14 seals the electronic compartment accommodating mechanism 101 and the oil and gas medium test piece 1. The pressure sensor accommodating mechanism 103 is opened to connect its interior with the accommodating hole 11.

[0086] The pressure test system for the underwater pressure and temperature integrated transmitter is switched to a first state.

[0087] The on-off valve 42 of the first processing unit 4 is opened, and the receiving hole 11 is evacuated by the vacuum pump 41, and then the on-off valve 42 is closed. During this process, the one of the first interface 15 and the fourth interface not connected to the first processing unit 4 is in a blocked state.

[0088] Helium is fed into the containment chamber 21 through the helium output unit 3, and then the detection result of the helium mass spectrometer 44 is observed to determine whether there is a leak in the electronic compartment containment mechanism 101. The helium can be normal pressure helium, and the time can be several seconds. Afterwards, the detection result of the helium mass spectrometer 44 is observed. If the amount of helium does not exceed 5×10 -8 mbar·l / s, it means that the sealing parts in the sealing parts of the housing mechanism in the electronic compartment accommodating mechanism 101 are well sealed without micro leakage.

[0089] This application also proposes a pressure testing method for a pressure testing system, which may include:

[0090] The underwater integrated pressure and temperature transmitter is installed in a pressure testing device for the underwater integrated pressure and temperature transmitter. The pressure sensor accommodating mechanism 103 of the underwater integrated pressure and temperature transmitter is located in the accommodating hole 11. The electronic compartment accommodating mechanism 101 of the underwater integrated pressure and temperature transmitter is located in the accommodating chamber 21. The electronic compartment accommodating mechanism 101 of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole 12 of the oil and gas medium test piece 1 through bolts. The first sealing member 14 seals the electronic compartment accommodating mechanism 101 and the oil and gas medium test piece 1. The electronic compartment accommodating mechanism 101 is opened to connect its interior with the accommodating chamber 21.

[0091] The pressure test system for the underwater pressure and temperature integrated transmitter is switched to the second state.

[0092] The on-off valve 42 of the first processing unit 4 is opened, and the accommodating chamber 21 is evacuated by the vacuum pump 41, and then the on-off valve 42 is closed. During this process, the one of the second interface 22 and the third interface 23 that is not connected to the first processing unit 4 is in a blocked state.

[0093] Helium is input into the receiving hole 11 through the helium output unit 3, and then the detection result of the helium mass spectrometer 44 is observed to determine whether there is leakage in the pressure sensor receiving mechanism 103. Similarly, the detection result of the helium mass spectrometer 44 is observed. If the amount of helium does not exceed 5×10 -8 mbar·l / s, it means that the seal at the sealing part of the housing mechanism in the pressure sensor housing is well sealed and there is no micro leakage.

[0094] This application also proposes a pressure testing method for a pressure testing system, which may include:

[0095] The underwater integrated pressure and temperature transmitter is installed in a pressure testing device for the underwater integrated pressure and temperature transmitter. The pressure sensor accommodating mechanism 103 of the underwater integrated pressure and temperature transmitter is located in the accommodating hole 11. The electronic compartment accommodating mechanism 101 of the underwater integrated pressure and temperature transmitter is located in the accommodating chamber 21. The underwater integrated pressure and temperature transmitter is electrically connected to the electrical connector 213. The electronic compartment accommodating mechanism 101 of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole 12 of the oil and gas medium test piece 1 through bolts. The first sealing member 14 seals the electronic compartment accommodating mechanism 101 and the oil and gas medium test piece 1.

[0096] The electrical testing unit 9 is electrically connected to the electrical connector 213 in the electrical interface 24 .

[0097] Oil and gas medium is injected into the receiving hole 11 via the oil and gas medium output unit 5. After the pressure increases to a first preset pressure, the pressure is maintained. The oil and gas medium is required to have a color. The oil and gas medium at the first preset pressure output by the oil and gas medium output unit 5 is used to simulate the pressure exerted by the oil and gas medium on the pressure sensor receiving mechanism 103 during actual operation.

[0098] Liquid is injected into the containment chamber 21 through the liquid supply and return lines of the high-pressure fluid power device 6 until the liquid in the return line flows into the housing. The return line is then closed, and the pressure in the liquid supply line is maintained after it reaches a second preset pressure. The liquid can be transparent and colorless. The liquid at the second preset pressure injected into the containment chamber 21 by the high-pressure fluid power device 6 simulates the ambient pressure, i.e., the pressure exerted by seawater on the electronics compartment containment mechanism 101, during actual operation.

[0099] After the first preset pressure and the second preset pressure are stabilized, the return liquid path is opened to allow the liquid in the accommodating chamber 21 to flow back into the box body, and the accommodating hole 11 is depressurized through the oil and gas medium output unit 5 .

[0100] By observing whether the liquid in the box has the color of the oil and gas medium, it can be determined whether the seal between the underwater pressure and temperature integrated transmitter and the oil and gas medium test piece 1 is in good condition; at the same time, the communication between the electrical test unit 9 and the underwater pressure and temperature integrated transmitter is monitored to see whether it is in good condition. If the originally transparent liquid in the box changes color and is mixed with a little color of the oil and gas medium, it means that the seal between the electronic compartment accommodating mechanism 101 and the oil and gas medium test piece 1 is not tight and there is a leakage problem; otherwise, it means that the seal between the electronic compartment accommodating mechanism 101 and the oil and gas medium test piece 1 is good. At the same time, when the above-mentioned accommodating chamber 21 is at the second preset pressure, the communication between the electrical test unit 9 and the underwater pressure and temperature integrated transmitter can be monitored to test whether the electrical interface 24 is in good condition under the second preset pressure.

[0101] The above-mentioned pressure relief and pressurization operations are repeated multiple times, and then the pressure maintenance phase is entered. After the pressure time reaches the preset time, the underwater pressure and temperature integrated transmitter is disassembled and opened to check whether there is any liquid leakage inside. According to the requirements of the API 17F standard ("API STANDARD 17F 2017. Standard for Subsea Production Control Systems", a standard issued by the API (American Petroleum Institute) organization) for the pressure cycle test of the underwater pressure and temperature integrated transmitter, three pressure relief and pressurization cycles are performed with a cycle of 5 minutes. After the third cycle, the pressure maintenance phase is entered, and the pressure maintenance time is maintained for at least 6 hours. Afterwards, the underwater pressure and temperature integrated transmitter is disassembled and opened to check whether there is any liquid leakage inside, thereby verifying whether its sealing is good.

[0102] The present application can use a closed-loop negative feedback control scheme to simultaneously inject liquid and oil-gas medium into the environmental pressure test mechanism 2 and the oil-gas medium test piece 1, respectively, based on the ambient pressure and oil-gas medium pressure during operation of the underwater pressure and temperature integrated transmitter. The oil-gas medium pressure and ambient pressure are adjusted by the first preset pressure output by the oil-gas medium output unit 5 and the second preset pressure output by the high-pressure fluid power device 6. Since the environmental pressure test uses a colorless liquid and the oil-gas medium uses a colored oil-gas medium, if the liquid in the box is colored, it indicates that the seal at the first seal 14 between the flange 102 of the underwater pressure and temperature integrated transmitter and the oil-gas medium test piece 1 has failed; otherwise, it indicates that the seal at the first seal 14 is good. By checking whether there is liquid or oil-gas medium penetration inside the underwater pressure and temperature integrated transmitter, the sealing of the underwater pressure and temperature integrated transmitter can be checked. At the same time, during the process of performing oil-gas medium pressure and ambient pressure tests on the underwater pressure and temperature integrated transmitter, the communication continuity between the underwater pressure and temperature integrated transmitter and the outside world can also be tested.

[0103] In addition, the present application can also use the helium output unit 3 and the first processing unit 4 to simultaneously perform a helium leakage test on the underwater pressure and temperature integrated transmitter to detect whether there are micro-leaks in the seals of the shell mechanisms of the pressure sensor accommodating mechanism 103 and the electronic compartment accommodating mechanism 101, and can specifically detect which shell mechanism of the pressure sensor accommodating mechanism 103 and the electronic compartment accommodating mechanism 101 has micro-leaks in the seals, thereby ensuring the integrity of the sealing function test of the underwater pressure and temperature integrated transmitter sealing machine.

[0104] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "essentially consisting of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates an embodiment that is essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0105] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure testing system for an underwater pressure and temperature integrated transmitter, characterized in that: The pressure testing system for an underwater pressure-temperature integrated transmitter includes a pressure testing device for an underwater pressure-temperature integrated transmitter; a helium output unit; The first processing unit; the pressure testing device for the underwater pressure and temperature integrated transmitter comprises: An oil-gas medium test piece, the oil-gas medium test piece having a first end face and a second end face opposite to each other, a receiving hole for receiving a pressure sensor receiving mechanism of an underwater pressure and temperature integrated transmitter being provided on the first end face, a plurality of first threaded holes being provided on the first end face, the plurality of first threaded holes being distributed circumferentially around the receiving hole; a first annular groove being provided on the first end face, the first annular groove being located between the first threaded hole and the receiving hole, a first sealing member being provided in the first annular groove, the first sealing member being used to abut against the electronic compartment receiving mechanism of the underwater pressure and temperature integrated transmitter, a first interface and a fourth interface being provided on the oil-gas medium test piece, which are in communication with the receiving hole; An environmental pressure testing mechanism, the environmental pressure testing mechanism having a housing chamber for accommodating an electronic compartment housing of an underwater pressure and temperature integrated transmitter; the environmental pressure testing mechanism being sealably connected to a first end face of the oil and gas medium testing piece, the environmental pressure testing mechanism having a second interface communicating with the housing chamber, a third interface communicating with the housing chamber, and an electrical interface; The first processing unit includes a vacuum pump, an on-off valve having one end connected to the inlet of the vacuum pump, a three-way valve, and a helium mass spectrometer, wherein a first end of the three-way valve is connected to the other end of the on-off valve, and a second end of the three-way valve is connected to the helium mass spectrometer; The pressure testing system for an underwater integrated pressure and temperature transmitter includes a first state, in which the helium output unit can be connected to the second interface or the third interface, and the third end of the three-way valve of the first processing unit can be connected to the first interface or the fourth interface; The pressure testing system for the underwater integrated pressure and temperature transmitter includes a second state. In the second state, the helium output unit can be connected to the first interface or the fourth interface, and the third end of the three-way valve of the first processing unit can be connected to the second interface or the third interface.

2. The pressure testing system for underwater pressure and temperature integrated transmitter according to claim 1, characterized in that: A plurality of second threaded holes are further formed on the first end surface, and the plurality of second threaded holes are distributed circumferentially around the receiving hole, and the second threaded holes are located outside the first threaded hole; The environmental pressure testing mechanism includes: a cylinder and an end cover that seals one end of the cylinder, the other end of the cylinder has a first outer edge, and a first through hole is opened on the first outer edge; the first through hole cooperates with the second threaded hole through a bolt to connect the cylinder and the oil and gas medium testing piece together; a second annular groove is provided on the end surface of the other end of the cylinder, and a second sealing member is provided in the second annular groove.

3. The pressure testing system for underwater pressure and temperature integrated transmitter according to claim 2, characterized in that: One end of the cylinder has a second outer edge, and a plurality of second through holes are provided on the second outer edge; the end cover has a third through hole corresponding to the second through hole, and the second through hole cooperates with the third through hole through a bolt to connect the cylinder and the end cover together; a third annular groove is provided at the contact point between one end of the cylinder and the end cover, and a third sealing member is provided in the third annular groove.

4. The pressure testing system for underwater pressure and temperature integrated transmitter according to claim 2, characterized in that: The second interface, the third interface and the electrical interface are located on the end cover, and the end cover is in a flat plate shape; An electrical connector is provided in the electrical interface, and the electrical connector is located on one side of the end cover forming the accommodating chamber, and a pressing member is connected to the side of the end cover forming the accommodating chamber for pressing the electrical connector toward the other side of the end cover; The clamping piece has a through hole, and the through hole and the electrical interface both have a step structure. The through hole accommodates part of the electrical connector and presses against the electrical connector through the step structure, and the electrical interface accommodates part of the electrical connector and presses against the electrical connector through the step structure; the clamping piece is connected to the end cover by bolts.

5. The pressure testing system for underwater pressure and temperature integrated transmitter according to claim 2, characterized in that: The second end surface is provided with the first interface connected to the accommodating hole; the fourth interface is located on the side wall of the oil and gas medium testing piece, and the fourth interface is connected to the accommodating hole through a connecting hole.

6. The pressure testing system for underwater pressure and temperature integrated transmitter according to claim 1, characterized in that: The pressure testing system for the underwater pressure and temperature integrated transmitter further includes: an oil-gas medium output unit, which can be connected to the first interface or the fourth interface, and can output colored oil-gas medium at a first preset pressure and maintain the pressure, wherein the oil-gas medium has a color; A high-pressure fluid power device comprising a housing, a liquid supply circuit and a liquid return circuit respectively connectable to the second interface and the third interface, the liquid supply circuit and the liquid return circuit being connectable to the housing, the liquid supply circuit of the high-pressure fluid power device being capable of outputting seawater having a second preset pressure and maintaining the pressure, and the liquid return circuit of the high-pressure fluid power device being capable of inputting recovered liquid into the housing, wherein the liquid is a transparent and colorless liquid; The pressure testing system for the underwater integrated pressure and temperature transmitter includes a third state. In the third state, the oil and gas medium output unit is connected to the first interface or the fourth interface, and the liquid supply line and the liquid return line of the high-pressure fluid power device are respectively connected to the second interface and the third interface.

7. A pressure testing method using a pressure testing system for an underwater pressure and temperature integrated transmitter as claimed in claim 1, characterized in that: The stress testing method includes: Installing an underwater integrated pressure and temperature transmitter into a pressure testing device for an underwater integrated pressure and temperature transmitter, wherein the pressure sensor accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating hole, and the electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating chamber. The electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole of the oil and gas medium test piece via a bolt, and a first sealing member seals the electronic compartment accommodating mechanism and the oil and gas medium test piece. The pressure sensor accommodating mechanism is opened to connect its interior to the accommodating hole. Switching the pressure test system for the underwater pressure and temperature integrated transmitter to a first state; Opening the on-off valve of the first processing unit, evacuating the receiving hole with a vacuum pump, and then closing the on-off valve; Helium is input into the containing chamber through a helium output unit, and then the detection result of the helium mass spectrometer is observed to determine whether there is leakage in the electronic cabin containing mechanism.

8. A pressure testing method using a pressure testing system for an underwater pressure and temperature integrated transmitter as claimed in claim 1, characterized in that: The stress testing method includes: An underwater integrated pressure and temperature transmitter is installed in a pressure testing device for an underwater integrated pressure and temperature transmitter, wherein the pressure sensor accommodation mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodation hole, and the electronic compartment accommodation mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodation chamber. The flange of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole of the oil and gas medium test piece via bolts, and a first sealing member seals the electronic compartment accommodation mechanism and the oil and gas medium test piece. The electronic compartment accommodation mechanism is opened to connect its interior with the accommodation chamber. Switching the pressure test system for the underwater pressure and temperature integrated transmitter to a second state; Opening the on-off valve of the first processing unit, evacuating the containing chamber using a vacuum pump, and then closing the on-off valve; Helium is input into the accommodating hole through a helium output unit, and then the detection result of the helium mass spectrometer is observed to determine whether there is leakage in the pressure sensor accommodating mechanism.

9. A pressure testing method using a pressure testing system for an underwater pressure and temperature integrated transmitter as claimed in claim 6, characterized in that: The stress testing method includes: The underwater integrated pressure and temperature transmitter is installed in a pressure testing device for the underwater integrated pressure and temperature transmitter, wherein the pressure sensor accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating hole, and the electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is located in the accommodating chamber. The underwater integrated pressure and temperature transmitter is electrically connected to the electrical connector, and the electronic compartment accommodating mechanism of the underwater integrated pressure and temperature transmitter is connected to the first threaded hole of the oil and gas medium test piece via a bolt. A first sealing member seals the electronic compartment accommodating mechanism and the oil and gas medium test piece; Electrically connecting the electrical test unit to the electrical connector in the electrical interface; injecting oil and gas into the receiving hole through the oil and gas medium output unit, and maintaining the pressure after the pressure increases to a first preset pressure; injecting liquid into the receiving chamber through the liquid supply circuit and the liquid return circuit of the high-pressure fluid power device until the liquid in the liquid return circuit flows into the box body, then closing the liquid return circuit, and maintaining the pressure when the pressure of the liquid supply circuit increases to a second preset pressure; After the first preset pressure and the second preset pressure are stabilized, the liquid return path is opened to allow the liquid in the accommodating chamber to flow back into the box body, and the accommodating hole is depressurized through the oil and gas medium output unit; By observing whether the liquid in the box has the color of the oil and gas medium, it is judged whether the seal between the underwater pressure and temperature integrated transmitter and the oil and gas medium test piece is good; at the same time, it is monitored whether the communication between the electrical test unit and the underwater pressure and temperature integrated transmitter is good; The above-mentioned pressure relief operation and pressurization operation are repeated for multiple cycles, and then the pressure maintaining stage is entered. After the pressure time reaches the preset time, the underwater pressure and temperature integrated transmitter is removed and opened to check whether there is any liquid leakage inside.

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