Test production platform and oil storage tank combined oil storage and output system

Abstract

The utility model discloses a pilot production platform and oil storage tank combined oil storage and output system which comprises an oil platform oil conveying pipeline installed on an oil platform and a temporary oil storage pipeline installed on the pilot production platform. The oil platform oil pipeline comprises a pipeline section group A, a pipeline section group B and a pipeline section group C which are connected in sequence; the A pipeline section set comprises at least one A pipeline section, the B pipeline section set comprises at least one B pipeline section, the C pipeline section set comprises at least one B pipeline section, and the temporary oil storage pipeline comprises an E pipeline section and a D pipeline section which are arranged on the inlet side and the outlet side of the temporary oil storage tank respectively. According to the utility model, the oil extraction, oil storage and output efficiency is improved, the production stop risk of an oil platform is reduced, and the device has typical offshore oil production guiding significance in oil fields of the same type, especially when the oil storage tank is overhauled or replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of offshore oil storage and transportation, and specifically relates to an oil storage and transportation system combined with a test production platform and an oil storage tank. Background Art

[0002] The offshore oil production site environment is harsh, and both human resources and material resources are very scarce and tight. Therefore, in order to ensure the orderly progress of oil production, it is necessary to optimize on-site materials and integrate equipment to improve production efficiency and reduce production costs. Whether it is near the coast or far from the coast, most of the oil production on the oil platform is not directly transported to the land through oil pipelines, but transported back to the land by large tankers. However, the back-and-forth transportation process of the tanker takes time, and the oil storage capacity of the oil platform and the tanker is limited. Therefore, when encountering special circumstances such as oil tank maintenance and bad weather at sea, the oil platform may passively reduce production or even stop production. For the oil platform, any suspension of production will cause huge property losses, so ensuring that oil production does not stop for non-essential reasons is the most basic task of offshore oil production.

[0003] Therefore, it is necessary to adopt a practical technical solution to achieve the flexibility of offshore oil storage. In the prior art, since the production system of each offshore oil platform is independent or has special functions, the equipment, facilities and pipelines of each oil platform are planned in the early stage of platform construction according to the expected functions, and the oil platforms are often far apart. Therefore, except for the interconnected pipelines that have been built when they are put into production, there are often not many intersections between the platforms during the oil production process. Therefore, the oil export is also carried out independently. However, in the process of continuous exploration and development of offshore oil fields, there is also a test production platform that can be moved as needed, but the prior art does not take advantage of the mobility of this platform to jointly store and transport oil. Therefore, the mobility of the test production platform can be fully utilized according to actual conditions to realize oil storage and export. Utility Model Content

[0004] The utility model is proposed to overcome the shortcomings in the prior art, and its purpose is to provide a test production platform and an oil storage tank combined oil storage and external transmission system.

[0005] The utility model is realized by the following technical solutions:

[0006] A test production platform and oil storage tank combined oil storage and external transmission system, comprising an oil platform oil pipeline installed on the oil platform and a temporary oil storage pipeline installed on the test production platform; the oil platform oil pipeline comprises an A pipeline segment group, a B pipeline segment group and a C pipeline segment group connected in sequence; the A pipeline segment group comprises at least one group of A pipeline segments, the B pipeline segment group comprises at least one group of B pipeline segments, the C pipeline segment group comprises at least one group of B pipeline segments, the A pipeline segment comprises a No. I ball valve, a No. I stop valve, a No. I emergency shut-off valve, an oil storage tank, a No. II emergency shut-off valve, a No. II stop valve and a No. II ball valve connected in series in sequence; the B pipeline segment comprises a filter, a No. I external transmission pump and a No. III ball valve connected in series in sequence; the C pipeline segment comprises an exhaust device, a No. I flow meter, a flow regulating valve, a No. III emergency shut-off valve and a reserved port connected in series in sequence, and the inlet of the oil tanker is connected to the pipeline between the No. III emergency shut-off valve and the reserved port;

[0007] The temporary oil storage pipeline includes an E pipeline segment and a D pipeline segment respectively arranged at the inlet and outlet sides of the temporary oil storage tank, the D pipeline segment includes a No. IX ball valve and a cooler connected in series, and the E pipeline segment includes a No. IV ball valve, a filter, a No. V ball valve, a No. II external transfer pump and a reserved blind plate connected in series in sequence.

[0008] In the above technical solution, when the pipeline segment group A, the pipeline segment group B and the pipeline segment group C are composed of multiple groups of pipelines, the multiple groups of pipelines are connected in parallel.

[0009] In the above technical scheme, multiple groups of inlets of No. Ⅰ ball valves in the A pipeline segment are connected in parallel, and multiple outlets of No. Ⅱ ball valves are connected in parallel; multiple filter inlets are connected in parallel, and multiple emergency shut-off valve three outlets are connected in parallel; multiple exhaust device inlets of the C pipeline segment are connected in parallel; multiple inlets of No. Ⅳ ball valves in the E pipeline are connected in parallel, and multiple inlets of the reserved blind plates are connected through a section of pipeline; multiple inlets of No. IX ball valves in the D pipeline segment are connected in parallel, and the cooler outlets are all connected in series with the inlet of the temporary oil storage tank.

[0010] In the above technical solution, the temporary oil storage pipeline also includes a No. VIII ball valve, the inlet of which is connected to the outlet of the reserved blind plate, and the outlet of which is connected in parallel to the inlet of the No. IX ball valve and then connected to the rear end of the reserved port.

[0011] In the above technical solution, the test production platform and the oil storage tank combined oil storage and transmission system also includes a separator, and the outlet of the separator is connected to the inlet of the cooler.

[0012] In the above technical solution, the combined oil storage and transmission system of the test production platform and the oil storage tank also includes a foldable trestle arranged between the oil platform and the test production platform, and the pipeline between the reserved port and the No. VIII ball valve and the No. IX ball valve is laid on the trestle, and a thermometer for measuring the oil temperature in the pipeline and an oil collecting box for sampling are installed on the pipeline.

[0013] In the above technical scheme, the test production platform and oil storage tank combined oil storage and transmission system also includes a test production platform transmission pipeline installed on the test production platform, and the test production platform transmission pipeline includes a No. Ⅰ shut-off valve, a No. Ⅵ ball valve, a No. Ⅱ flow meter, a No. Ⅱ shut-off valve and a No. Ⅶ ball valve connected in series in sequence, the inlet of the No. Ⅰ shut-off valve is connected to the inlet of the reserved blind plate, and the outlet of the No. Ⅶ ball valve is connected to the inlet of the tanker.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides an oil storage and external transmission system which combines a test production platform and an oil storage tank, so that the oil stored in a temporary oil storage tank can be transmitted to the oil tanker without moving the oil tanker, thereby avoiding the risk of the oil tanker being parked near the movable test production platform, and reducing the cost by utilizing the pipeline on the trestle twice. In addition, the oil in the oil storage tank and the oil in the temporary oil storage tank can be simultaneously transmitted to the oil tanker, thereby improving the external transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0017] Figure 2 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0018] Figure 3 It is a structural schematic diagram of embodiment 3 of the present utility model.

[0019] in:

[0020] No. 111Ⅰ ball valve; No. 112Ⅱ ball valve; No. 113Ⅲ ball valve;

[0021] No. 121Ⅰ stop valve; No. 122Ⅱ stop valve;

[0022] No. 131Ⅰ emergency shut-off valve; No. 132Ⅱ emergency shut-off valve; No. 133Ⅲ emergency shut-off valve;

[0023] 141 oil storage tank;

[0024] 15 filter;

[0025] No. 16Ⅰ external pump;

[0026] 17 Exhaust device;

[0027] 181 Ⅰ flow meter; 182 flow control valve;

[0028] 19 reserved opening;

[0029] 21 separator;

[0030] 22 Cooler;

[0031] 23 Temporary oil storage tanks;

[0032] 241 IV ball valve; 242 V ball valve; 243 VI ball valve; 244 VII ball valve;

[0033] 245Ⅷ ball valve; 246Ⅸ ball valve;

[0034] 25 filters;

[0035] Shut-off valve No. 261Ⅰ; Shut-off valve No. 262Ⅱ;

[0036] 27Ⅱ flow meter;

[0037] 28 reserved blind plate;

[0038] No. 29Ⅱ external pump.

[0039] 3-Oil tankers;

[0040] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0042] Example 1

[0043] like Figure 1 As shown, a test production platform and oil storage tank combined oil storage and transmission system includes an oil platform oil pipeline installed on the oil platform and a temporary oil storage pipeline installed on the test production platform;

[0044] The oil platform oil pipeline comprises a pipeline segment A, a pipeline segment B and a pipeline segment C which are connected in sequence;

[0045] The pipeline section A includes a No. I ball valve 111, a No. I stop valve 121, a No. I emergency shut-off valve 131, an oil storage tank 141, a No. II emergency shut-off valve 132, a No. II stop valve 122 and a No. II ball valve 112 which are connected in series in sequence;

[0046] The pipeline section B includes a filter 15, a No. I external transfer pump 16 and a No. III ball valve 113 connected in series in sequence;

[0047] The C pipeline segment includes an exhaust device 17, a No. I flow meter 181, a flow regulating valve 182, a No. III emergency shut-off valve 133 and a reserved port 19 connected in series in sequence. The inlet of the tanker 3 is connected to the pipeline between the No. III emergency shut-off valve 133 and the reserved port 19; the exhaust device 17 is composed of an exhaust valve and an elbow connected to each other. When exhaust is required, the exhaust valve is opened and the gas to be exhausted is exhausted through the elbow. The structure of the exhaust device belongs to conventional design;

[0048] The temporary oil storage pipeline includes an E pipeline segment and a D pipeline segment respectively arranged at the inlet and outlet sides of the temporary oil storage tank 23.

[0049] The D pipeline section includes a No. IX ball valve 246 and a cooler 22 connected in series, and the outlet of the No. IX ball valve 246 is connected to the inlet of the cooler 22, and the outlet of the cooler 22 is connected to the inlet of the temporary oil storage tank 23, and the cooler 22 is installed on the test production platform;

[0050] The E pipeline section includes a No. IV ball valve 241, a filter 25, a No. V ball valve 242, a No. II external transfer pump 29 and a reserved port blind plate 28 connected in series in sequence. The inlet of the No. IV ball valve 241 is connected to the outlet of the temporary oil storage tank 23; the inlet of the reserved port blind plate 28 is connected to the No. II external transfer pump 29; in this embodiment, the reserved port of the pipeline installed on the oil platform is connected in series with the No. IX ball valve 246 and then connected to the cooler installed on the test production platform, so that the oil storage tank installed on the oil platform and the temporary oil storage tank installed on the test production platform can be connected and connected, thereby increasing the oil storage capacity, thereby avoiding the reduction of oil production due to insufficient storage capacity or untimely external transfer caused by the maintenance of the oil platform oil storage tank;

[0051] The temporary oil storage pipeline also includes a No. VIII ball valve 245, the inlet of which is connected to the outlet of the reserved blind plate 28, and the outlet of which is connected in parallel with the inlet of the No. IX ball valve 246 and then connected to the rear end of the reserved port 19; through the arrangement of the No. VIII ball valve 245 and the No. IX ball valve 246 and the corresponding pipeline sections, after closing the No. IX ball valve 246, the oil stored in the temporary oil storage tank can be transported to the oil tanker docked near the oil platform without moving the oil tanker, thereby reducing the risk of berthing of the oil tanker near the movable test production platform, and the pipeline can be used for oil transportation in both forward and reverse directions twice, which reduces the cost, and at the same time, the oil in the oil storage tank and the oil in the temporary oil storage tank can be transported to the oil tanker at the same time, and the pipelines of the oil platform and the test production platform operate at the same time, which greatly improves the external transportation efficiency.

[0052] In this embodiment, the filter 25 and the filter 15 are the same device, both of which are conventional filters.

[0053] Example 2

[0054] Based on Example 1, the combined oil storage and transmission system of the test production platform and the oil storage tank described in this embodiment also includes a separator 21, the outlet of the separator 21 is connected to the inlet of the cooler 22, and the setting of the separator 21 can enable the oil produced on the test production platform to be transported to the tanker 3 through the transmission pipeline.

[0055] In this embodiment, the model of the separator 21 is MPTU-V-2002 produced by Yantai Jereh Petroleum & Natural Gas Engineering Co., Ltd.; the model of the cooler 22 is MPTU-WC-2001 produced by Tianjin Huanya Marine Heat Exchanger Co., Ltd.

[0056] Example 3

[0057] Based on Example 1, the combined oil storage and transmission system of the test production platform and the oil storage tank described in this embodiment also includes a foldable trestle arranged between the oil platform and the test production platform. The trestle supports the pipeline to fix the pipeline. The pipeline between the reserved port 19 and the No. VIII ball valve 245 and the No. IX ball valve 246 is laid on the trestle, and a thermometer for measuring the oil temperature in the pipeline (not marked in the figure) and an oil collecting box for sampling (not marked in the figure) are installed on the pipeline; the pipeline arranged on the trestle is a hose, and an electric heater and rubber-plastic cotton are arranged on the outer surface of the hose to insulate the oil in the hose.

[0058] During use, the pipeline between the reserved port 19 and the No. VIII ball valve 245 and the No. IX ball valve 246 connects the oil platform and the test production platform. The use of a thermometer to measure the oil temperature in the pipeline facilitates real-time monitoring of temperature changes in the pipeline, and timely measures can be taken when the temperature of the crude oil in the pipeline deviates from the normal value. The oil collecting box is used for sampling and monitoring the quality of oil transported in and out of the pipeline. At the same time, the trestle can be folded and retracted, which increases the mobility of the test production platform when it is not storing oil or transporting it outside.

[0059] Example 4

[0060] Based on Example 1, in order to prevent the problem that the pier cannot export oil due to the disconnection of the pipeline due to wind and waves or other reasons, the test production platform and oil storage tank combined oil storage and export system described in this embodiment also includes a test production platform export pipeline installed on the test production platform, such as Figure 2 As shown, the test production platform external transmission pipeline includes a No. I shut-off valve 261, a No. VI ball valve 243, a No. II flow meter 27, a No. II shut-off valve 262 and a No. VII ball valve 244 which are connected in series in sequence. The inlet of the No. I shut-off valve 261 is connected to the inlet of the reserved blind plate 28, and the outlet of the No. VII ball valve 244 is connected to the inlet of the tanker 3.

[0061] The test production platform transmission pipeline in this embodiment can be used in emergency situations, especially when the tanker 3 arrives at the oil field.

[0062] Example 5

[0063] Based on Example 1, in order to increase the crude oil export efficiency of the oil platform and the test production platform, reduce the berthing time of the oil tanker, and increase the ability to resist fault risks during operation, each pipeline segment of the test production platform and the oil storage tank combined oil storage export system described in this embodiment is provided with multiple groups of pipeline segments and equipment, specifically:

[0064] like Figure 3 As shown, the oil platform oil pipeline includes a pipeline segment group A, a pipeline segment group B and a pipeline segment group C which are connected in sequence;

[0065] The A pipeline segment group includes three groups of A pipeline segments connected in parallel, in which the inlets of the No. Ⅰ ball valves 111 are connected in parallel, and the outlets of the No. Ⅱ ball valves 112 are connected in parallel;

[0066] The B pipeline segment group includes three groups of B pipeline segments connected in parallel, the filter 15 inlet is connected in parallel, and the emergency shut-off valve three 133 outlet is connected in parallel;

[0067] The C pipeline segment group includes two groups of C pipeline segments connected in parallel; the exhaust device 17 inlets of the two groups of C pipeline segments are connected in parallel;

[0068] The temporary oil storage pipeline includes an E pipeline segment group and a D pipeline segment group respectively arranged at the inlet and outlet sides of the temporary oil storage tank 23.

[0069] The E pipeline segment group includes two sets of E pipeline segments connected in parallel, the inlets of the IV ball valves 241 in the two sets of E pipelines are connected in parallel, and the inlets of the two sets of reserved blind plates 28 are connected through a section of pipeline;

[0070] The D pipeline segment group includes two groups of D pipeline segments connected in parallel, the inlets of the No. IX ball valves 246 in the two groups of D pipeline segments are connected in parallel, and the outlets of the coolers 22 are connected in series with the inlet of the temporary oil storage tank 23.

[0071] The working process of this utility model:

[0072] When in use, multiple groups of A pipeline segments, B pipeline segments, and C pipeline segments installed on the oil platform complete daily crude oil processing, storage, and transportation work, and multiple groups of D pipeline segments and E pipeline segments installed on the test production platform complete storage, processing, and transportation work. The setting of multiple groups of pipeline segments can prevent pipeline failures during the oil export process, and can also increase the efficiency of oil storage and export, reduce the berthing time of the tanker 3, and reduce the risk of long-term operation during the export process. The test production platform export pipeline is set on the test production platform to prevent the problem that the pier cannot export oil due to wind and waves or other reasons. The test production platform export pipeline is used in emergency situations, especially when the tanker 3 arrives at the oil field. A foldable trestle is connected between the pipeline segments A, B and C of the oil platform and the pipeline segments D and E of the test production platform. The trestle supports the pipeline to fix the pipeline. The pipeline between the reserved port 19 and the No. VIII ball valve 245 and the No. IX ball valve 246 is laid on the trestle. After closing the No. IX ball valve 246, the oil stored in the temporary oil storage tank 23 can be transported to the oil tanker 3 without moving the oil tanker 3, reducing the risk of berthing near the movable test production platform, and using the pipeline on the trestle twice to reduce the cost. In addition, the oil in the oil storage tank 141 and the oil in the temporary oil storage tank 23 can be transported to the oil tanker 3 at the same time, improving the external transmission efficiency. A thermometer for measuring the oil temperature in the pipeline and an oil collecting box for sampling are installed on the pipeline, which can monitor the oil temperature in the pipeline and the quality of the externally transmitted oil in real time. At the same time, the trestle can be folded and retracted, increasing the flexibility of the test production platform when it is not storing oil or transmitting it externally.

[0073] The utility model improves the efficiency of oil production, storage and external transportation, reduces the risk of oil platform shutdown, and has typical offshore oil production guidance significance in the same type of oil fields, especially when encountering the working conditions of oil storage tank maintenance or replacement.

[0074] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0075] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0076] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0077] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A test production platform and oil storage tank combined oil storage and external transmission system, characterized by: The invention comprises an oil platform oil pipeline installed on an oil platform and a temporary oil storage pipeline installed on a test production platform; the oil platform oil pipeline comprises an A pipeline segment group, a B pipeline segment group and a C pipeline segment group connected in sequence; the A pipeline segment group comprises at least one group of A pipeline segments, the B pipeline segment group comprises at least one group of B pipeline segments, the C pipeline segment group comprises at least one group of B pipeline segments, the A pipeline segment comprises a No. I ball valve (111), a No. I stop valve (121), a No. I emergency shut-off valve (131), an oil storage tank (141), a No. II ... The oil tanker (3) comprises an emergency shut-off valve (132), a No. II stop valve (122) and a No. II ball valve (112); the pipeline section B comprises a filter (15), a No. I export pump (16) and a No. III ball valve (113) which are sequentially connected in series; the pipeline section C comprises an exhaust device (17), a No. I flow meter (181), a flow regulating valve (182), a No. III emergency shut-off valve (133) and a reserved port (19) which are sequentially connected in series, and the inlet of the oil tanker (3) is connected to the pipeline between the No. III emergency shut-off valve (133) and the reserved port (19); The temporary oil storage pipeline comprises an E pipeline segment and a D pipeline segment respectively arranged at the inlet and outlet sides of the temporary oil storage tank (23); the D pipeline segment comprises a No. IX ball valve (246) and a cooler (22) connected in series with each other; and the E pipeline segment comprises a No. IV ball valve (241), a filter (25), a No. V ball valve (242), a No. II external transfer pump (29) and a reserved blind plate (28) connected in series in sequence.

2. The oil storage and transmission system of the test production platform and oil storage tank combined with the oil storage tank according to claim 1 is characterized by: When the pipeline segment group A, the pipeline segment group B and the pipeline segment group C are composed of multiple groups of pipelines, the multiple groups of pipelines are connected in parallel.

3. The oil storage and transmission system of the test production platform and oil storage tank combined with the oil storage tank according to claim 2 is characterized by: The inlets of multiple groups of No. Ⅰ ball valves (111) in the A pipeline segment are connected in parallel, and the outlets of multiple No. Ⅱ ball valves (112) are connected in parallel; the inlets of multiple filters (15) are connected in parallel, and the outlets of multiple emergency shut-off valves are connected in parallel; the inlets of multiple exhaust devices (17) in the C pipeline segment are connected in parallel; the inlets of multiple No. Ⅳ ball valves (241) in the E pipeline are connected in parallel, and the inlets of multiple reserved blind plates (28) are connected through a section of pipeline; the inlets of multiple No. IX ball valves (246) in the D pipeline segment are connected in parallel, and the outlets of the coolers (22) are all connected in series with the inlet of the temporary oil storage tank (23).

4. The oil storage and transmission system of the test production platform and oil storage tank combined with the oil storage tank according to claim 1 is characterized by: The temporary oil storage pipeline also includes a No. VIII ball valve (245), the inlet of the No. VIII ball valve (245) is connected to the outlet of the reserved port blind plate (28), and the outlet of the No. VIII ball valve (245) is connected in parallel with the inlet of the No. IX ball valve (246) and then connected to the rear end of the reserved port (19).

5. The oil storage and transmission system of the test production platform and oil storage tank combined with oil storage according to claim 1 is characterized by: The test production platform and oil storage tank combined oil storage and external transmission system further comprises a separator (21), and the outlet of the separator (21) is connected to the inlet of the cooler (22).

6. The oil storage and transmission system of the test production platform and oil storage tank combined with the oil storage tank according to claim 1 is characterized by: The test production platform and the oil storage tank combined oil storage and transmission system also includes a foldable trestle bridge arranged between the oil platform and the test production platform, and the pipeline between the reserved port (19) and the No. VIII ball valve (245) and the No. IX ball valve (246) is laid on the trestle bridge, and a thermometer for measuring the oil temperature in the pipeline and an oil collecting box for sampling are installed on the pipeline.

7. The oil storage and transmission system of the test production platform and oil storage tank combined with the oil storage tank according to claim 1 is characterized by: The test production platform and oil storage tank combined oil storage and transmission system also includes a test production platform transmission pipeline installed on the test production platform, and the test production platform transmission pipeline includes a No. I shut-off valve (261), a No. VI ball valve (243), a No. II flow meter (27), a No. II shut-off valve (262) and a No. VII ball valve (244) connected in series in sequence, the inlet of the No. I shut-off valve (261) is connected to the inlet of the reserved blind plate (28), and the outlet of the No. VII ball valve (244) is connected to the inlet of the tanker (3).

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