Offshore oil platform production water discharge flow detection device

Abstract

The utility model discloses an offshore oil platform production water discharge flow detection device which comprises a cylindrical container, the container is provided with an axial first end and an axial second end, and the part, close to the first end, of the container is connected with a production water incoming pipeline; the part, close to the second end, of the container is connected with a production water measuring pipeline, a flowmeter is arranged on the production water measuring pipeline, one end, away from the container, of the production water measuring pipeline is connected with a U-shaped pipe, and an opening of the U-shaped pipe faces downwards; the end portion of the first end of the container is connected with an exhaust pipe, and the exhaust pipe is connected with the upper end of the U-shaped pipe through a connecting pipe. The container can carry out gas-liquid separation on gas-containing production water according to the gravity separation principle, the exhaust pipe can be communicated with the open cold exhaust vent, and the U-shaped pipe can be communicated with the open cold exhaust vent through the connecting pipe, so that the purposes of separating gas in the production water, ensuring the full pipe of a production water measuring pipeline and accurate metering are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore oil, in particular to a detection device for the external discharge flow of produced water on an offshore oil platform. Background Art

[0002] During the production process of an offshore oil platform, the platform will treat the produced water extracted through a produced water treatment system, and the treated produced water that meets the standards will be discharged into the sea after being measured by a produced water external discharge flowmeter. There are clear requirements for the discharge volume of produced water in the project "Environmental Impact Assessment Report", and over-discharge is not allowed; therefore, ensuring the measurement accuracy of the produced water external discharge flowmeter is of great significance for the production of the oil platform and marine environmental protection. Through research on the usage of the produced water external discharge flowmeter on the offshore oil platform, it is found that most of the produced water external discharge flowmeters on the offshore oil platform are electromagnetic flowmeters, and their working principle is mainly based on Faraday's law of electromagnetic induction. When a conductive liquid flows in a magnetic field, an induced electromotive force will be generated in the liquid, and this electromotive force is proportional to the flow velocity of the liquid.

[0003] As Figure 1 shown, the produced water external discharge flow measurement device in the related art includes a front riser section 100 of the measurement pipe section, a produced water incoming liquid pipeline 200, and a produced water measurement pipe section 300. The inner diameter of the front riser section 100 of the measurement pipe section is smaller, and the inner diameter of the front riser section 100 of the measurement pipe section is the same as that of the produced water incoming liquid pipeline 200. An electromagnetic flowmeter 400 is provided on the produced water measurement pipe section 300. Among them, the electromagnetic flowmeter 400 requires that the produced water measurement pipe section 300 be full of liquid. When the liquid in the produced water measurement pipe section 300 is not full, the fluid will not completely fill the entire produced water measurement pipe section 300, but flow in a certain way, which may form voids or vortices, resulting in errors in the measurement results of the flow velocity and flow rate, thus affecting the measurement accuracy. During the actual production process, due to a large amount of gas dissolved in the produced water, as the pressure drop escapes, when flowing through the electromagnetic flowmeter 400, it is easy to cause eddies, turbulence, etc., affecting the measurement accuracy of the electromagnetic flowmeter 400 and resulting in inaccurate measurement. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a detection device for the external discharge flow of produced water on an offshore oil platform.

[0005] The technical solution adopted by the present utility model to solve its technical problems is as follows: A production water discharge flow detection device for an offshore oil platform is constructed, including a container. The container is columnar and has an axial first end and a second end. A production water incoming liquid pipeline is connected to a part of the container near its first end; a production water measurement pipeline is connected to a part of the container near its second end. A flow meter is provided on the production water measurement pipeline. One end of the production water measurement pipeline far from the container is connected to a U-shaped tube, and the opening of the U-shaped tube is arranged downward; an exhaust pipe is connected to the end of the first end of the container, and the exhaust pipe is connected to the upper end of the U-shaped tube through a connecting pipe.

[0006] In some embodiments, the container is cylindrical.

[0007] In some embodiments, the inner diameter of the container is larger than the inner diameter of the production water incoming liquid pipeline.

[0008] In some embodiments, the inner diameter of the container is larger than the inner diameter of the production water measurement pipeline.

[0009] In some embodiments, the inner diameter of the connecting pipe is less than or equal to the inner diameter of the exhaust pipe.

[0010] In some embodiments, a plurality of partition plates are provided in the container. The plurality of partition plates are arranged at intervals in the height direction and are arranged staggeredly left and right.

[0011] In some embodiments, the container is a metal container.

[0012] In some embodiments, one end of the exhaust pipe is connected to the central position of the end of the first end of the container.

[0013] In some embodiments, the flow meter includes an electromagnetic flow meter.

[0014] Implementing the present utility model has the following beneficial effects: The container of the production water discharge flow detection device for the offshore oil platform can perform gas-liquid separation on the gas-containing production water through the gravity separation principle. An exhaust pipe is provided at the top of the container, and the exhaust pipe can be connected to the open drain cold blowdown port. The exhaust pipe is connected to the upper end of the U-shaped tube through a connecting pipe, so that the U-shaped tube can be connected to the open drain cold blowdown port through the connecting pipe, thereby achieving the purpose of separating the gas in the production water, ensuring that the production water measurement pipeline is full of liquid, and achieving accurate measurement. In addition, the U-shaped tube plays an effect of sealing water and exhausting gas through its U-shaped structure. At the same time, the connecting pipe is connected to the open drain cold blowdown port. On the one hand, it can discharge the separated gas, and on the other hand, it can also prevent the production water in the measurement pipeline from being siphoned, resulting in the problem of inaccurate measurement of the flow meter due to the pipeline not being full of liquid, ensuring accurate and stable measurement. Description of the Drawings

[0015] To more clearly illustrate the technical solution of the present utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the production water external discharge flow measurement in some embodiments of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the production water external discharge flow detection device of an offshore oil platform in some embodiments of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the production water external discharge flow detection device of an offshore oil platform in some other embodiments of the present utility model. Detailed implementation manners

[0019] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the detailed implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, with a specific orientation structure and operation, and are only for the convenience of describing the present technical solution, rather than indicating that the indicated devices or elements must have a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0020] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When a component is referred to as "on" or "under" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. The terms "first", "second", "third", etc. are only for the convenience of describing the technical solution of the present invention, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. However, those skilled in the art should clearly understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present invention.

[0022] Referring to Figure 2 , the present invention shows a device for detecting the discharge flow rate of produced water from an offshore oil platform, which includes a container 10. The container 10 is columnar, and preferably, the container 10 is cylindrical. The container 10 can be a metal container 10. For example, the container 10 can be made of stainless steel. Preferably, the container 10 can be a riser with a large diameter.

[0023] The container 10 has an axial first end and a second end. The part of the container 10 near its first end is connected to the produced water incoming pipeline 20. The produced water incoming pipeline 20 can be used to connect to the produced water treatment system, and the produced water flows into the container 10 through the produced water incoming pipeline 20. The inner diameter of the container 10 is larger than the inner diameter of the produced water incoming pipeline 20, and the inner diameter dimension of the container 10 can be 2 to 5 times the inner diameter dimension of the produced water incoming pipeline 20.

[0024] A portion of the container 10 near its second end is connected to the produced water measurement pipeline 30, and a flowmeter 40 is provided on the produced water measurement pipeline 30. The flowmeter 40 includes, but is not limited to, an electromagnetic flowmeter. One end of the produced water measurement pipeline 30 away from the container 10 is connected to a U-shaped pipe 50, and the opening of the U-shaped pipe 50 is arranged downward. Preferably, the inner diameter of the container 10 is larger than the inner diameter of the produced water measurement pipeline 30, and the inner diameter of the container 10 can be 2 to 5 times the inner diameter of the produced water incoming pipeline 20.

[0025] An exhaust pipe 60 is connected to the end of the first end of the container 10, and the exhaust pipe 60 is connected to the upper end of the U-shaped pipe 50 through a connecting pipe 70. Preferably, one end of the exhaust pipe 60 is connected to the central position of the end of the first end of the container 10. Preferably, the inner diameter of the connecting pipe 70 is less than or equal to the inner diameter of the exhaust pipe 60, and / or the inner diameter of the connecting pipe 70 is less than or equal to the inner diameter of the U-shaped pipe 50.

[0026] The container 10 can perform gas-liquid separation on the gas-containing produced water through the gravity separation principle. An exhaust pipe 60 is provided at the top of the container 10. The exhaust pipe 60 can be connected to the open drain cold vent. The exhaust pipe 60 is connected to the upper end of the U-shaped pipe 50 through a connecting pipe 70, so that the U-shaped pipe 50 can be connected to the open drain cold vent through the connecting pipe 70, thereby achieving the purpose of separating the gas in the produced water, ensuring that the produced water measurement pipeline 30 is full of liquid, and accurate metering. In addition, the U-shaped pipe 50 plays the role of sealing water and exhausting gas through its U-shaped structure. At the same time, the connecting pipe 70 is connected to the open drain cold vent. On the one hand, the separated gas can be discharged, and on the other hand, it also avoids the problem that the produced water measurement pipeline 30 is not full of liquid due to the siphon of the liquid, resulting in inaccurate metering of the flowmeter 40, ensuring accurate and stable measurement.

[0027] As Figure 3 shown, in some other embodiments, a plurality of partition plates 11 are provided in the container 10. The plurality of partition plates 11 are arranged at intervals in the height direction, and the plurality of partition plates 11 are arranged staggeredly left and right. The uppermost partition plate 11 can be arranged on the lower side of the connection end of the container 10 and the produced water incoming pipeline 20.

[0028] Setting the partition plate 11 in the container 10 can make the produced water from the produced water incoming pipeline 20 collide with the partition plate 11 when entering the container 10, which can promote the separation of the dissolved gas in the produced water. The partition plate 11 can be made of a metal plate. Of course, the partition plate 11 may not be provided in the container 10, and no specific limitation is made here.

[0029] It can be understood that by applying the produced water external discharge flow detection device of the offshore oil platform, the exhaust effect is obvious, and the measurement result of the flowmeter 40 is accurate and stable.

[0030] Understandably, the above embodiments only represent the preferred embodiments of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several deformations and improvements can also be made, which all fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. A device for detecting the outflow flow rate of produced water from an offshore oil platform, characterized in that: The invention comprises a container (10), wherein the container (10) is columnar and has an axial first end and a second end. The portion of the container (10) close to the first end is connected to a production water inlet pipeline (20); the portion of the container (10) close to the second end is connected to a production water measuring pipeline (30), a flow meter (40) is provided on the production water measuring pipeline (30), and an end of the production water measuring pipeline (30) away from the container (10) is connected to a U-shaped tube (50), the opening of the U-shaped tube (50) is arranged downward; the end of the first end of the container (10) is connected to an exhaust pipe (60), and the exhaust pipe (60) is connected to the upper end of the U-shaped tube (50) via a connecting pipe (70).

2. The offshore oil platform production water outflow flow detection device according to claim 1 is characterized in that: The container (10) is cylindrical.

3. The offshore oil platform production water outflow flow detection device according to claim 1 is characterized in that: The inner diameter of the container (10) is greater than the inner diameter of the produced water inlet pipeline (20).

4. The offshore oil platform produced water outflow flow detection device according to claim 1, characterized in that: The inner diameter of the container (10) is greater than the inner diameter of the produced water measuring pipe (30).

5. The offshore oil platform produced water outflow flow detection device according to claim 1, characterized in that: The inner diameter of the connecting pipe (70) is smaller than or equal to the inner diameter of the exhaust pipe (60).

6. The offshore oil platform produced water outflow flow detection device according to claim 1, characterized in that: A plurality of partitions (11) are arranged in the container (10), the plurality of partitions (11) are arranged at intervals along the height direction, and the plurality of partitions (11) are arranged alternately left and right.

7. The offshore oil platform produced water outflow flow detection device according to claim 1, characterized in that: The container (10) is a metal container.

8. The offshore oil platform produced water outflow flow detection device according to claim 1, characterized in that: One end of the exhaust pipe (60) is connected to the center position of the end of the first end of the container (10).

9. The offshore oil platform produced water outflow flow detection device according to claim 1, characterized in that: The flow meter (40) comprises an electromagnetic flow meter.

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