Underwater caisson oil and gas leakage detection system based on radioactive source
By using a gamma-ray transceiver system in an underwater caisson, the problem of monitoring failure caused by marine organism obstruction was solved, enabling sensitive, long-lasting, qualitative, and quantitative detection of oil and gas leaks, while reducing equipment costs.
Patent Information
- Application Number
- CN202520451087.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Existing underwater caisson oil and gas leak monitoring technologies are easily blocked by marine organisms, leading to monitoring failure. They are also costly and difficult to achieve sensitive and long-term qualitative and quantitative detection.
The system employs a gamma-ray transceiver system, including a ray emission module and a ray receiving module. By penetrating the fluid detection zone inside the underwater caisson with gamma rays and combining the phase fraction with calculations, it can detect oil and gas leaks. The structural design avoids obstruction by marine organisms and utilizes the strong penetrating power of gamma rays to achieve sensitive and long-term monitoring.
It enables sensitive, long-term, qualitative, and quantitative detection of oil and gas leaks in underwater caissons, reduces the impact of marine organism obstruction, and lowers equipment costs.
Smart Images
Figure CN223756249U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of petroleum engineering, specifically relates to the safety detection device of underwater oil and gas exploitation. BACKGROUND
[0002] The underwater caisson is a new structure suitable for shallow water production system. The underwater caisson is inverted on the water bottom, and various facilities of the underwater production system, such as the Christmas tree, the control system and the metering system, are installed inside. In the oil and gas recovery process, various instruments, valves and facilities, as well as pipelines connecting the instruments, valves and facilities, may leak oil and gas, which will affect production and cause environmental crisis. Therefore, timely mastering the oil and gas leakage situation has important reference value for platform rapid decision-making and disposal.
[0003] Earlier, oil and gas traders used point-to-point monitoring methods to master the leakage situation. This method requires many devices and has high cost. In the underwater caisson, leaked oil and gas will gather at the top of the caisson, so the leakage situation can be monitored at the top of the caisson. The existing monitoring technology uses ultraviolet fluorescence detection to determine whether there is crude oil leakage. However, when it is applied to the underwater caisson, the following problems may occur: the inside of the underwater caisson is a relatively closed environment, and marine organisms grow rapidly inside. Marine organisms are easy to attach to the detection probe and form a shield, which causes monitoring failure. Therefore, it is necessary to select a new oil and gas leakage monitoring technology for the underwater caisson. CONTENT OF THE UTILITY MODEL
[0004] The utility model provides a kind of detection system based on that gamma ray attenuates differently after passing through different phases, and whether the detection system of oil and gas leakage of underwater caisson, the main technical scheme used is:
[0005] A kind of underwater caisson oil and gas leakage detection system based on radioactive source, including base body and gamma ray transceiver system, the gamma ray transceiver system includes ray emitting module and ray receiving module;The ray emitting module and ray receiving module are configured on the base body, the ray emitting module emits gamma ray, the ray receiving module detects and receives the gamma ray emitted by the ray emitting module, the ray emitting module and the ray receiving module are configured with fluid detection area, characterized in that:
[0006] The base body includes underwater caisson and support, the support and the gamma ray transceiver system are located inside the underwater caisson, the support and the gamma ray transceiver system are located at the top of the underwater caisson, oil guide channel is provided on the base body, which communicates the inside of the underwater caisson with the detection area.
[0007] It is a mature technology to detect the phase fraction (volume percentage or mass percentage) of each phase in two-phase flow (oil-gas, oil-water, gas-water, solid-liquid, solid-gas or gas-liquid) or three-phase flow (oil-gas-water or solid-liquid-gas) in the fluid to be detected by emitting gamma rays to the fluid to be detected and then acquiring the gamma ray signal intensity passing through the fluid to be detected; this technology can obtain the phase fraction data of the fluid to be detected more accurately, and thus it is feasible to apply it to the oil and gas leakage monitoring scene on the top of the caisson. Even if marine organisms grow and attach on the ray emitting module and / or the ray receiving module to form an obstruction, the gamma rays can still penetrate the detection area, and the oil content and the gas content of the detection area can be obtained by combining the mature formula, and when the oil content and the gas content are greater than zero, it indicates that there is oil and gas leakage in the underwater caisson. Of course, after a longer period of time, marine organisms continue to grow and may fill the detection area, at which time the solid (marine organisms) content of the detection area will be high, and it needs to be cleaned. Compared with the detection structure used by the ultraviolet fluorescence method, the detection structure used by the present application is less affected by marine organisms, and has the advantages of sensitive, long-acting, qualitative and quantitative detection. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 It is a three-dimensional structure schematic diagram of the present application;
[0009] Figure 2 It is a schematic diagram of the cooperation relationship of the fixed outer cylinder 101 and the ray emitting module 200;
[0010] Figure 3 It is a cross-sectional structure schematic diagram of the present application under the first visual angle;
[0011] Figure 4 It is a cross-sectional structure schematic diagram of the present application under the first visual angle. DETAILED DESCRIPTION
[0012] The present application will be further described below in combination with the embodiments and the drawings.
[0013] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a radiation source-based underwater caisson oil and gas leakage detection system has a basic structure including a base and a gamma-ray transceiver system, the gamma-ray transceiver system including a ray emitting module 200 and a ray receiving module 300; the ray emitting module 200 and the ray receiving module 300 are arranged on the base, the ray emitting module 200 emits gamma rays, the ray receiving module 300 detects the gamma rays emitted by the ray emitting module 200, and a fluid detection area is arranged between the ray emitting module 200 and the ray receiving module 300. The base includes an underwater caisson A and a support 100, the support 100 and the gamma-ray transceiver system are located inside the underwater caisson A, the support 100 and the gamma-ray transceiver system are located at the top of the underwater caisson A, an oil guide channel is arranged on the base, and the oil guide channel communicates the inside of the underwater caisson A with the detection area. The oil guide channel can be specially arranged, or it can be an open space between the support 100, the gamma-ray transceiver system, the support 100 and the underwater caisson A, or the gamma-ray transceiver system and the underwater caisson A.
[0014] Preferred scheme ①: A preferred arrangement of the oil guide channel is that the oil guide channel includes a top oil guide groove 10a, the top oil guide groove 10a is a horizontal straight-through groove, the top oil guide groove 10a is arranged at the top of the support 100, the groove opening of the top oil guide groove 10a faces upward, the top wall of the underwater caisson A covers the groove opening of the top oil guide groove 10a, and the two ends of the top oil guide groove 10a communicate the inside of the underwater caisson A with the detection area. In this way, when oil and gas leakage occurs inside the underwater caisson, oil and gas first concentrates at the top of the caisson; the leaked oil and gas can flow along the horizontal top oil guide straight-through groove and quickly guide to the detection area, and the position and structure design of the top oil guide groove 10a can avoid the structure of the support 100 from forming an obstruction on the horizontal flow path of the oil and gas.
[0015] Preferred scheme ②: Further, a preferred technical scheme of the detection area is that the detection area is constrained by a detection upper wall and a detection lower wall, the detection upper wall is located above the detection lower wall, the detection upper wall is arranged on the ray emitting module 200, the detection upper wall is a horizontal plane, and the detection upper wall is flush with the top wall of the underwater caisson A; the detection lower wall is arranged on the ray receiving module 300. In this preferred scheme, the top wall (detection upper wall) of the detection area is flush with the top wall of the underwater caisson A; on the one hand, it can avoid the structure of the corresponding gamma-ray transceiver system of the detection area from forming an obstruction on the horizontal flow path of the oil and gas, so that the leaked oil and gas can be quickly guided into the inside of the detection area; on the other hand, it is convenient for disposal after oil and gas leakage and beneficial to emptying of the detection area.
[0016] On the basis of the basic structure of the detection system, the preferred solutions ① and ② are independent of each other in structure, and any one of them can be selected for separate implementation. The more preferred solution is to implement the preferred solutions ① and ② simultaneously on the basis of the basic structure of the detection system, at which time the detection area and the top oil guide groove 10a are directly connected, and the top wall of the detection area (the upper detection wall) and the top wall of the top oil guide groove 10a (the top wall of the underwater caisson A) are connected and flush.
[0017] The preferred solution ③ is a preferred connection solution of a gamma-ray transmitting and receiving system and the underwater caisson A, in which the ray emitting module 200 is installed on the top of the underwater caisson A, and the ray receiving module 300 is located below the ray emitting module 200. In the prior art, the volume occupied by the ray receiving module 300 is larger than that of the ray emitting module 200, and the above structure can make the detection area relatively closer to the top wall of the underwater caisson A, thereby ensuring that the leaked oil and gas can flow into the detection area relatively timely. A further preferred solution of the preferred solution is that the top lower surface of the underwater caisson A is provided with a mounting counterbore, the ray emitting module 200 is installed in the mounting counterbore on the top of the underwater caisson A, the ray emitting module 200 is provided with a ray emitting window, the ray emitting window is downwardly arranged, and the ray receiving module 300 is located below the ray emitting window; the lower surface of the ray emitting window is flush with the upper detection wall.
[0018] The preferred solution ④ is a preferred connection solution of a support 100 and the underwater caisson A, in which the support 100 is installed on the top of the underwater caisson A. This preferred installation structure can provide more stable support for the support 100.
[0019] The preferred solution ⑤ is a preferred connection solution of a gamma-ray transmitting and receiving system and the support 100, in which the ray receiving module 300 is detachably connected with the support 100. This preferred connection structure facilitates the quick disassembly and assembly of the ray receiving module 300 during the later treatment of oil and gas leakage or maintenance.
[0020] On the basis of the basic structure of the detection system, the structures involved in the preferred solutions ③, ④ and ⑤ are independent of each other; the three preferred solutions can exist simultaneously, or any one or any two of them can be selected. A more preferred solution is to implement the preferred solutions ③, ④ and ⑤ simultaneously on the basis of the basic structure of the detection system; at this time, the ray emitting module 200 and the support 100 are simultaneously installed (optionally pre-installed) on the top of the underwater caisson A, and the ray receiving module 300 is detachably connected with the support 100.
[0021] On the basis of the basic structure of the detection system, the structures involved in the preferred solutions ①, ②, ③, ④ and ⑤ are independent of each other; the five preferred solutions can be implemented simultaneously, or any one, two, three or four of them can be selected for implementation.
[0022] The structure of the gamma ray transceiver system is as follows: the ray emitting module 200 comprises an emitting end base 201 and a radioactive source assembly 202; the radioactive source assembly 202 is arranged inside the emitting end base 201, and the radioactive source assembly 202 is provided with the ray emitting window, the lower surface of the ray emitting window is flush with the lower surface of the emitting end base 201; the emitting end base 201 is embedded in the mounting counterbore, and the emitting end base 201 and the underwater caisson A can be connected by bolts, and the lower surface of the emitting end base 201 is flush with the lower surface of the underwater caisson A. The structure of the radioactive source assembly 202 and the assembly structure of the radioactive source assembly 202 and the emitting end base 201 belong to the prior art, and will not be described here. The ray receiving module 300 comprises a receiving end base 301 and a ray probe 302, the ray probe 302 is arranged on the top of the receiving end base 301, and the ray probe 302 is located below the ray emitting module 200. The structure of the ray probe 302 and the mounting structure of the ray probe 302 belong to the prior art, and will not be described here.
[0023] In the preferred scheme ⑤, the detachable connection scheme of the ray receiving module 300 and the support 100 is as follows: the support 100 comprises a fixed outer cylinder 101, the fixed outer cylinder 101 is vertically arranged, the upper end of the fixed outer cylinder 101 is fixed with the underwater caisson A, and the upper end of the fixed outer cylinder 101 surrounds the ray emitting module 200. The ray receiving module 300 is inserted into the fixed outer cylinder 101 and detachably connected therewith, specifically, the ray receiving module 300 is rotationally locked with the outer cylinder 101. The rotationally locked scheme of the ray receiving module 300 and the outer cylinder 101 can be thread locking or other prior art rotationally locked schemes. Of course, the ray receiving module 300 also needs to be connected with an electronic warehouse module to process the gamma signals received by the ray receiving module 300.
[0024] The upper end of the fixed outer cylinder 101 is provided with at least part of the oil guide channel; and the top oil guide groove 10a is also arranged at the upper end of the fixed outer cylinder 101.
[0025] In the description of the drawings, Figure 3 , Figure 4 The first and second visual angles of and are relative concepts and do not refer to a certain fixed visual angle or two fixed visual angles.
[0026] Beneficial effects: the gamma ray transceiver structure is adopted to detect whether there is oil phase or gas phase on the top of the underwater caisson, so as to monitor the oil and gas leakage in the underwater caisson. This structure is little affected by marine organisms and has the advantages of sensitivity, long-term effect, qualitative and quantitative.
[0027] It should be explained that the above description is only the preferred embodiment of the utility model, and the ordinary skilled in the art can make various similar expressions under the inspiration of the utility model without violating the purpose of the utility model and the premise of the claims, and such changes fall within the protection scope of the utility model.
Claims
1. A radioactive source-based underwater caisson oil and gas leakage detection system, comprising a base body and a gamma-ray transceiver system, the gamma-ray transceiver system comprising a ray emitting module (200) and a ray receiving module (300); the ray emitting module (200) and the ray receiving module (300) are arranged on the base body, the ray emitting module (200) emits gamma rays, the ray receiving module (300) detects the gamma rays emitted by the ray emitting module (200), and a fluid detection area is arranged between the ray emitting module (200) and the ray receiving module (300), characterized in that: the base body comprises an underwater caisson (A) and a support (100), the support (100) and the gamma-ray transceiver system are located inside the underwater caisson (A), the support (100) and the gamma-ray transceiver system are located at the top of the underwater caisson (A), and an oil guide channel is arranged on the base body, which communicates the inside of the underwater caisson (A) with the detection area. The oil guide channel comprises a top oil guide groove (10a), which is a horizontal through groove, the top oil guide groove (10a) is arranged at the top of the support (100), the opening of the top oil guide groove (10a) faces upward, the top wall of the underwater caisson (A) covers the opening of the top oil guide groove (10a), and the two ends of the top oil guide groove (10a) communicate the inside of the underwater caisson (A) with the detection area.
2. The radioactive source based underwater caisson oil and gas leak detection system of claim 1, wherein: The ray emitting module (200) is installed at the top of the underwater caisson (A), and the ray receiving module (300) is located below the ray emitting module (200).
3. The radioactive source based underwater caisson oil and gas leak detection system of claim 1, wherein: The support (100) is installed at the top of the underwater caisson (A).
4. The radioactive source based underwater caisson oil and gas leak detection system of claim 1, wherein: The ray receiving module (300) is detachably connected with the support (100).
5. The radioactive source based underwater caisson oil and gas leak detection system of claim 1, wherein: The ray emitting module (200) is installed at the top of the underwater caisson (A), the ray emitting module (200) is arranged with a ray emitting window, the ray emitting window is arranged downward, and the ray receiving module (300) is located below the ray emitting window.
6. The radioactive source based underwater caisson oil and gas leak detection system of claim 1, wherein: The detection area is bounded by a detection upper wall and a detection lower wall, the detection upper wall is located above the detection lower wall, the detection upper wall is arranged on the ray emitting module (200), the detection upper wall is a horizontal plane, the detection upper wall is flush with the top wall of the underwater caisson (A), and the lower surface of the ray emitting window is flush with the detection upper wall; the detection lower wall is arranged on the ray receiving module (300).
7. The radioactive source based underwater caisson oil and gas leak detection system of claim 6, wherein: The top lower surface of the underwater caisson (A) is provided with a mounting counterbore, the ray emitting module (200) comprises an emitting end base (201) and a radioactive source assembly (202); 8. A radioactive source based underwater caisson oil and gas leak detection system according to claim 6 or 7, characterised in that: The radioactive source assembly (202) is arranged inside the emitting end base (201), the radioactive source assembly (202) is arranged with the ray emitting window, and the lower surface of the ray emitting window is flush with the lower surface of the emitting end base (201). The transmitting end base (201) is embedded in the mounting counterbore, and a lower surface of the transmitting end base (201) is flush with a lower surface of the underwater caisson (A).
9. The radioactive source based underwater caisson oil and gas leak detection system of claims 1, 2, 3, 4, 5, 6, or 7, wherein: The support (100) comprises a fixed outer cylinder (101) vertically arranged, an upper end of the fixed outer cylinder (101) being fixed with the underwater caisson (A), and the upper end of the fixed outer cylinder (101) being arranged around the ray emitting module (200). The ray receiving module (300) is inserted into and detachably connected with the fixed outer cylinder (101), and an upper end of the fixed outer cylinder (101) is provided with the oil guide channel.
10. The radioactive source based underwater caisson oil and gas leak detection system of claims 1, 2, 3, 4, 5, 6, or 7, wherein: The ray receiving module (300) comprises a receiving end base (301) and a ray probe (302), the ray probe (302) being arranged on a top of the receiving end base (301), and the ray probe (302) being located below the ray emitting module (200).