Crude oil sampler system for post pump high pressure line
By designing a buffer tank and sampling circuit structure in the high-pressure pipeline after the pump, the problem of high crude oil pour point caused by high-pressure sampling was solved, achieving high-precision crude oil sampling and ensuring the accuracy and safety of the test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOPEC OILFIELD SERVICE CORPORATION
- Filing Date
- 2025-08-08
- Publication Date
- 2026-08-04
AI Technical Summary
When sampling in high-pressure pipelines, the crude oil's pour point is too high due to high-speed shearing, which fails to reflect the actual physical properties of the pipeline-transported crude oil and affects the accuracy of the test.
Design a crude oil sampler system for high-pressure pipelines after pumps. The system uses a buffer tank to buffer the settling of high-pressure crude oil, reducing the shear effect of pump pressurization on the crude oil. A sampling tube and connecting branch structure are used to form a sampling loop to reduce shearing.
It improves sampling accuracy, ensures the accuracy of sampling results, reduces the impact of crude oil rheology, and reduces the difficulty of crude oil injection and valve closure.
Smart Images
Figure CN224594251U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil transportation engineering technology, specifically to a crude oil sampler system for high-pressure pipelines after pumps. Background Technology
[0002] Pipeline crude oil transportation often employs heating and pour point depressant (PPT) addition processes to achieve energy conservation and consumption reduction. During pipeline transportation, crude oil inevitably undergoes short-term strong shearing at the pump and long-term weak shearing within the pipeline, thus affecting its rheological properties. Therefore, sampling the crude oil after PPT addition and analyzing the impact of changes in its rheological properties on pipeline energy consumption is crucial.
[0003] Because of the high pressure after the pipeline centrifugal pump, the crude oil has to undergo high-speed shearing of the sampler during the pressurized sampling process, resulting in a higher pour point of the oil sample, which cannot reflect the actual physical properties of the pipeline crude oil. Utility Model Content
[0004] To address the aforementioned deficiencies in existing technologies, a crude oil sampler system for high-pressure pipelines after pumps is provided. This system uses a buffer tank to buffer and settle high-pressure crude oil, thereby reducing the impact of pump pressurization on crude oil shear.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A crude oil sampler system for post-pump high-pressure pipelines is used on post-pump crude oil pipelines; it includes a sampling cylinder with a vent branch at the top and a sampling branch at the bottom; the side wall of the sampling cylinder is connected to the post-pump crude oil pipeline through a connecting pipe.
[0006] According to the above technical solution, a first connecting branch is provided in the sampling cylinder and the crude oil pipeline after the pump. The first connecting branch includes a first pipeline and a first valve located on the first pipeline. The two ends of the first pipeline are respectively fixedly connected to the side wall of the sampling cylinder and the crude oil pipeline after the pump.
[0007] According to the above technical solution, a second connecting branch is also provided in the sampling cylinder and the crude oil pipeline after the pump; the second connecting branch includes a second pipeline and a second valve located on the second pipeline, and the two ends of the second pipeline are respectively fixedly connected to the side wall of the sampling cylinder and the crude oil pipeline after the pump; crude oil enters the sampling cylinder through the first connecting pipeline, and then flows back to the crude oil pipeline after the pump from the sampling cylinder through the second connecting pipeline.
[0008] According to the above technical solution, a main valve is installed on the crude oil pipeline after the pump, and the main valve is located between the first connecting branch and the second connecting branch.
[0009] According to the above technical solution, on the side wall of the sampling cylinder, the connection port between the second pipeline and the side wall of the sampling cylinder is higher than the connection port between the first pipeline and the side wall of the sampling cylinder.
[0010] According to the above technical solution, two T-joints are provided on the crude oil pipeline after the pump. The first pipeline is connected to the crude oil pipeline after the pump through the T-joint, and the second pipeline is connected to the crude oil pipeline after the pump through the T-joint.
[0011] According to the above technical solution, the sampling branch includes a sampling pipeline and a third valve connected to the sampling pipeline; the venting branch includes a venting pipeline and a fourth valve connected to the venting pipeline.
[0012] According to the above technical solution, the top of the venting pipeline is provided with a downward bend; the sampling pipeline is laid vertically.
[0013] According to the above technical solution, the first valve, the second valve, the third valve, the fourth valve, and the main valve are all high-pressure ball valves; the pressure rating of the high-pressure ball valve, the pressure rating of the sampling cylinder, and the pressure ratings of the first pipeline, the second pipeline, the sampling pipeline, and the venting pipeline are all not lower than the pressure rating of the crude oil pipeline after the pump.
[0014] According to the above technical solution, the sampling tube is equipped with a level gauge, or the sampling tube is made of a transparent material shell.
[0015] This utility model has the following beneficial effects: 1. By installing a sampling cylinder between the sampling branch and the crude oil pipeline after the pump, the sampling cylinder is used to buffer and settle the sampled crude oil, reducing the impact of shearing action under the pressure of the crude oil pump on the sampler, thereby reducing the impact of pressurized sampling on the rheological properties of crude oil and improving the accuracy of sampling.
[0016] 2. By setting up a second connecting branch and a first connecting branch, a sampling loop is formed. Crude oil enters the sampling cylinder through the first connecting branch. During the filling process of the sampling cylinder, or after the sampling cylinder is filled, the crude oil is transported to the crude oil pipeline after the pump through the second connecting branch, thereby relieving the pressure of the crude oil at the vent branch. This not only reduces the amount of crude oil injected from the vent branch, but also reduces the difficulty of closing the valve at the vent branch.
[0017] 3. The sampling tube is equipped with a level gauge, or the sampling tube is made of a transparent material shell; this facilitates observation of the crude oil level in the sampling tube and determines whether crude oil sampling has been completed.
[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description
[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0020] Figure 1 This is a schematic diagram illustrating the principle of an embodiment provided by this utility model; Figure 2 This is a model diagram of an embodiment provided by this utility model; Figure 3 This is a front view of the sampling tube provided in an embodiment of this utility model; Figure 4 yes Figure 3 Sectional view of BB; In the diagram, 1. Crude oil pipeline after pump; 2. Sampling cylinder; 3. Vent branch; 3-1. Vent pipeline; 3-2. Fourth valve; 3-3. Elbow; 4. Sampling branch; 4-1. Sampling pipeline; 4-2. Third valve; 5. First connecting branch; 5-1. First pipeline; 5-2. First valve; 6. Second connecting branch; 6-1. Second pipeline; 6-2. Second valve; 7. Main valve; 8. T-joint. Detailed Implementation
[0021] The following is in conjunction with the appendix Figures 1-4 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.
[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0024] Reference Figures 1-4 As shown, this utility model provides a crude oil sampler system for high-pressure pipelines after pumps.
[0025] Example 1 It is applied to the crude oil pipeline 1 after the pump; it includes a sampling cylinder 2, a vent branch 3 at the top of the sampling cylinder, and a sampling branch 4 at the bottom of the sampling cylinder; the side wall of the sampling cylinder is connected to the crude oil pipeline after the pump through a connecting pipe.
[0026] The sampling cylinder and the crude oil pipeline after the pump are provided with a first connecting branch 5. The first connecting branch includes a first pipeline 5-1 and a first valve 5-2 located on the first pipeline. The two ends of the first pipeline are respectively fixedly connected to the side wall of the sampling cylinder and the crude oil pipeline after the pump.
[0027] In the above structure, the vent branch and the first valve are opened to fill the sampling cylinder with crude oil, and the air in the sampling cylinder is discharged through the vent branch. Then, the vent branch and the first valve are closed. The crude oil is allowed to stand in the sampling cylinder for a period of time, after which the sampling branch and the vent branch are opened to obtain the crude oil in the sampling cylinder for testing. After sampling is completed, the vent branch and the sampling branch are closed.
[0028] By installing a sampling cylinder between the sampling branch and the crude oil pipeline after the pump, the sampling cylinder is used to buffer and settle the sampled crude oil, reducing the impact of shearing action after the crude oil pump is pressurized on the sampler, thereby reducing the impact of pressurized sampling on the rheological properties of crude oil and improving the accuracy of sampling.
[0029] Example 2 Because only the first connecting pipe is installed, the crude oil pressure inside the sampling cylinder will be too high. After the sampling cylinder is filled, a large amount of crude oil will be ejected through the vent branch. In order to alleviate the crude oil pressure at the sampling branch, a second connecting branch 6 is also provided between the sampling cylinder and the crude oil pipeline after the pump. The second connecting branch includes a second pipe 6-1 and a second valve 6-2 located on the second pipe. The two ends of the second pipe are fixedly connected to the side wall of the sampling cylinder and the crude oil pipeline after the pump, respectively. Crude oil enters the sampling cylinder through the first connecting pipe, and then flows back to the crude oil pipeline after the pump from the sampling cylinder through the second connecting pipe.
[0030] A sampling loop is formed by setting up a second connecting branch and a first connecting branch. Crude oil enters the sampling cylinder through the first connecting branch. During or after the sampling cylinder is filled, the crude oil is transported to the crude oil pipeline after the pump through the second connecting branch, thereby relieving the pressure of the crude oil at the vent branch. This not only reduces the amount of crude oil injected from the vent branch, but also reduces the difficulty of closing the valve at the vent branch.
[0031] A main valve 7 is installed on the crude oil pipeline after the pump, located between the first connecting branch and the second connecting branch. After setting the second connecting branch and the first connecting branch, the crude oil pipeline has two branches at the sampler: one branch is the crude oil pipeline after the pump, and the other branch is a bypass branch consisting of the first connecting branch, the sampling cylinder, and the second connecting branch. By installing the main valve on the crude oil pipeline after the pump, when the sampling cylinder needs to be filled with crude oil, the main valve is closed or partially closed, using the oil pressure of the crude oil pipeline after the pump to fill the sampling cylinder; after the sampling cylinder is filled, the main valve is opened to reduce the oil pressure on the "bypass branch," facilitating the closure of the first and second valves.
[0032] In a preferred embodiment of Example 2, the connection port between the second pipeline and the side wall of the sampling cylinder is higher than the connection port between the first pipeline and the side wall of the sampling cylinder.
[0033] In a preferred embodiment 2, two T-joints 8 are provided on the crude oil pipeline after the pump. The first pipeline is connected to the crude oil pipeline after the pump through the T-joints, and the second pipeline is connected to the crude oil pipeline after the pump through the T-joints.
[0034] In embodiments 1 and 2, the sampling branch includes a sampling pipeline 4-1 and a third valve 4-2 connected to the sampling pipeline; the venting branch includes a venting pipeline 3-1 and a fourth valve 3-2 connected to the venting pipeline.
[0035] Example 3 Based on Examples 1 and 2, when crude oil spray occurs in the venting branch, in order to prevent rain and avoid arbitrary upward splashing, the top of the venting pipeline is provided with a downward bend 3-3; in order to facilitate the emptying of crude oil in the sampling cylinder, the sampling pipeline is laid vertically.
[0036] In Examples 1, 2, and 3, the first valve, the second valve, the third valve, the fourth valve, and the main valve are all high-pressure ball valves; the pressure rating of the high-pressure ball valve, the pressure rating of the sampling cylinder, and the pressure ratings of the first pipeline, the second pipeline, the sampling pipeline, and the venting pipeline are all not lower than the pressure rating of the crude oil pipeline after the pump.
[0037] Example 4 Based on Examples 1-3, in order to facilitate the observation of the crude oil level in the sampling tube and determine whether the crude oil sampling has been completed, the sampling tube is equipped with a level gauge, or the sampling tube is made of a transparent material shell.
[0038] The principle and process of this utility model: S1: Close or partially close the main valve, open the first valve, the second valve, and the fourth valve on the vent branch, and crude oil enters the sampling cylinder through the first connecting branch; S2: When the sampler is found to be full of crude oil, close the fourth valve on the vent branch and open the main valve; then close the first valve and the second valve to complete the sampling of the sampling tube.
[0039] S3: After the crude oil in the sampling cylinder has been left to stand for a period of time, open the third valve on the sampling branch and the fourth valve on the venting branch. The crude oil in the sampling cylinder will flow out from the sampling port at the bottom of the sampling branch, thus completing the entire sampling process.
[0040] In the above process, the crude oil in the post-pump crude oil pipeline first flows into the sampling cylinder, where it settles and is buffered before flowing out from the sampling port at the bottom of the sampling branch. Compared to sampling directly from the post-pump crude oil pipeline, this avoids the high-pressure direct sampling process, prevents high-pressure shearing of the sampled crude oil, ensures that the physical properties of the sampled crude oil are the same as those of the crude oil in the post-pump crude oil pipeline, and ensures the accuracy of the test results.
[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A crude oil sampler system for a post-pump high pressure pipeline, applied to a post-pump crude oil pipeline; characterized in that: It includes a sampling cylinder, with a vent branch at the top and a sampling branch at the bottom; the side wall of the sampling cylinder is connected to the crude oil pipeline after the pump via a connecting pipe.
2. The crude oil sampler system for a post-pump high pressure line of claim 1, wherein: A first connecting branch is provided in the sampling cylinder and the crude oil pipeline after the pump. The first connecting branch includes a first pipeline and a first valve located on the first pipeline. The two ends of the first pipeline are respectively fixedly connected to the side wall of the sampling cylinder and the crude oil pipeline after the pump.
3. The crude oil sampler system for a post-pump high pressure line of claim 2, wherein: A second connecting branch is also provided in the sampling cylinder and the crude oil pipeline after the pump; the second connecting branch includes a second pipeline and a second valve located on the second pipeline. The two ends of the second pipeline are fixedly connected to the side wall of the sampling cylinder and the crude oil pipeline after the pump, respectively; crude oil enters the sampling cylinder through the first connecting pipeline, and then flows back to the crude oil pipeline after the pump from the sampling cylinder through the second connecting pipeline.
4. The crude oil sampler system for a post-pump high pressure line of claim 3, wherein: A main valve is installed on the crude oil pipeline after the pump, and the main valve is located between the first connecting branch and the second connecting branch.
5. The crude oil sampler system for a post-pump high pressure line of claim 3, wherein: On the side wall of the sampling tube, the connection port between the second pipeline and the side wall of the sampling tube is higher than the connection port between the first pipeline and the side wall of the sampling tube.
6. The crude oil sampler system for a post-pump high pressure line of claim 3, wherein: Two T-joints are installed on the crude oil pipeline after the pump. The first pipeline is connected to the crude oil pipeline after the pump through the T-joint, and the second pipeline is connected to the crude oil pipeline after the pump through the T-joint.
7. The crude oil sampler system for a post-pump high pressure pipeline of any one of claims 4-6, wherein: The sampling branch includes a sampling pipeline and a third valve connected to the sampling pipeline; the venting branch includes a venting pipeline and a fourth valve connected to the venting pipeline.
8. The crude oil sampler system for a post-pump high pressure line of claim 7, wherein: The venting pipeline has a downward bend at the top; the sampling pipeline is laid vertically.
9. The crude oil sampler system for a post-pump high pressure line of claim 7, wherein: The first valve, second valve, third valve, fourth valve, and main valve are all high-pressure ball valves; the pressure rating of the high-pressure ball valves, the pressure rating of the sampling cylinder, and the pressure ratings of the first pipeline, second pipeline, sampling pipeline, and venting pipeline are all not lower than the pressure rating of the crude oil pipeline after the pump.
10. The crude oil sampler system for a post-pump high pressure line of claim 1, wherein: The sampling tube is equipped with a level gauge, or the sampling tube is made of a transparent material shell.