Wellhead crude oil moisture content detecting and sampling device

Abstract

The utility model discloses a wellhead crude oil moisture content detecting and sampling device, which relates to the technical field of crude oil detecting and sampling, and comprises a wellhead line pipe, a collecting barrel is arranged on one side of the wellhead line pipe, a liquid outlet pipe is fixedly connected to the surface of the collecting barrel, and a valve body is arranged in the liquid outlet pipe. According to the sampling device for detecting the moisture content of the crude oil at the wellhead, after a worker observes that dead oil is completely collected from a transparent plate, a threaded rod is rotated, so that an upper cavity and a lower cavity communicate with each other, meanwhile, a separation plate drives a connecting rod to move, the connecting rod drives a movable plate to move, and the movable plate slides in a sliding groove; the movable plate moves to cover the collecting tank, then the movable plate blocks the collecting tank, the situation that a worker carries two tanks to respectively receive crude oil and dead oil is not needed any more, and meanwhile the crude oil and the dead oil are loaded through one tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of crude oil detection and sampling, in particular to a device for detecting and sampling the water content of wellhead crude oil. Background Technique

[0002] The water content of wellhead crude oil is a basic production data in the field of oil exploration and plays an important role in oil production engineering, storage and transportation engineering, and petrochemical industry. The accurate value of the water content directly affects many aspects of oilfield production, such as well test production management, crude oil transportation pipelines, multiphase flow measurement, and crude oil analysis systems.

[0003] When most of the existing crude oil sampling is carried out, a branch pipe is connected to the main pipe and the main pipe is sealed with a valve body. However, according to Bernoulli's equation, for water to flow, there must be a pressure difference. When the water-using end valve on the branch pipe is not opened, the pressure at any point in the water pipe (ignoring the pressure in the longitudinal direction of the pipe diameter) is equal, and their pressures are all equal to the pressure at the connection between the branch pipe and the main pipe (the branch pipe can be regarded as the connection pipe of a pressure gauge). Therefore, there is no pressure difference between them and they cannot flow, which will cause the crude oil remaining in the branch pipe not to flow and result in dead oil. To avoid the device continuously detecting dead oil and causing incorrect detection results, the staff needs to separately collect the dead oil and flowing crude oil. Therefore, the staff needs to carry two buckets to hold the crude oil and dead oil, and needs to mark or store the flowing crude oil and dead oil separately to avoid mixing the flowing crude oil and dead oil. At the same time, the two buckets are not convenient for the staff to carry. For this reason, a device for detecting and sampling the water content of wellhead crude oil is proposed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to at least solve one of the technical problems existing in the prior art, and provide a device for detecting and sampling the water content of wellhead crude oil, which can solve the problems in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A device for detecting and sampling the water content of wellhead crude oil includes a wellhead pipeline. One side of the wellhead pipeline is provided with a collection bucket. The surface of the collection bucket is fixedly connected with a liquid outlet pipe. A valve body is arranged inside the liquid outlet pipe. The surface of the collection bucket is fixedly connected with a collection box. The lower end of the collection box is also fixedly connected with a liquid outlet pipe. The internal structures of the two liquid outlet pipes are the same. The upper end of the collection bucket is threadedly connected with a threaded rod, and the threaded rod penetrates into the interior of the collection bucket. A separation plate is slidably connected inside the collection bucket, and the separation plate divides the interior of the collection bucket into an upper cavity and a lower cavity. The lower cavity is slightly larger than the upper cavity. The inner wall of the upper cavity is provided with a collection groove, and the collection groove penetrates into the interior of the collection box. The collection bucket and the collection box are interconnected.

[0006] Preferably, a transparent plate is fixedly connected to the surface of the collection bucket.

[0007] Preferably, the surface of the separation plate is provided as an inclined surface.

[0008] Preferably, one end of the threaded rod located inside the collection barrel is rotatably connected to the surface of the separation plate. A fixed block is fixedly connected to the inner wall of the upper cavity. A sliding groove is formed on the surface of the fixed block. A movable plate is slidably connected to the inner wall of the sliding groove. The surface of the movable plate is slidably connected to the inner wall of the upper cavity. One side of the movable plate away from the upper cavity is fixedly connected to a connecting rod. One end of the connecting rod away from the movable plate is fixedly connected to the surface of the separation plate.

[0009] Preferably, a connecting pipe is fixedly connected to the surface of the wellhead pipeline. The wellhead pipeline and the connecting pipe are interconnected. A fixed pipe is fixedly connected to the upper end of the collection barrel. The inner wall of the fixed pipe is threadedly connected to the surface of the connecting pipe.

[0010] Preferably, a rotary valve is provided on the surface of the connecting pipe.

[0011] Preferably, a limiting plate is fixedly connected to the inner wall of the fixed pipe. A sliding rod is slidably connected inside the limiting plate, and the sliding rod penetrates to the outside of the limiting plate. A spring is fixedly connected inside the limiting plate. One end of the spring away from the limiting plate is fixedly connected to the sliding rod. One end of the sliding rod located outside the limiting plate is fixedly connected to a blocking plate.

[0012] Preferably, a sealing gasket is fixedly connected to the bottom of the limiting plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] (1). For this wellhead crude oil water content detection and sampling device, when the staff observes through the transparent plate that the dead oil collection is completed, the threaded rod is rotated. The threaded rod rotates and moves towards the inside of the collection barrel. Then, the threaded rod pushes the separation plate, causing the separation plate to move into the lower cavity. Thus, the separation plate no longer divides the upper cavity and the lower cavity, and the upper cavity and the lower cavity are interconnected. At the same time, the separation plate drives the connecting rod to move, and the connecting rod drives the movable plate to move. The movable plate slides inside the sliding groove. When the upper cavity and the lower cavity are interconnected, the movable plate moves and covers the collection groove. Thus, the movable plate seals the collection groove. Then, it is no longer necessary for the staff to carry two tank barrels to separately receive the crude oil and the dead oil. At the same time, the crude oil and the dead oil are loaded and carried by one tank body, which is convenient for the staff to carry and uniformly process.

[0015] (2) For the wellhead crude oil water cut detection and sampling device, when the fixed pipe and the connecting pipe are fixed, the operator rotates the rotary valve. As a result, the rotary valve no longer blocks the crude oil inside the wellhead pipeline. The crude oil enters the inside of the fixed pipe through the connecting pipe. When the crude oil enters the inside of the fixed pipe, it squeezes the baffle plate. The baffle plate moves under the force, creating a gap between the baffle plate and the inside of the fixed pipe. The baffle plate no longer blocks the crude oil inside the fixed pipe, and the crude oil enters the inside of the collection barrel through the fixed pipe. At the same time, the movement of the baffle plate pulls the sliding rod, and the sliding rod moves to squeeze the spring. After the crude oil collection is completed, the operator rotates the rotary valve in the opposite direction to close it. The crude oil no longer enters the connecting pipe from the wellhead pipeline. As a result, the baffle plate is no longer under force. Under the elastic force of the spring, the sliding rod drives the baffle plate to move, making the baffle plate stick to the sealing gasket to seal the crude oil inside the collection barrel. This avoids the situation where the operator accidentally knocks over the collection barrel when sealing the fixed pipe, causing the crude oil inside the collection barrel to flow out from the fixed pipe. At the same time, it is convenient for the operator to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0017] Figure 1 is a schematic structural diagram of a wellhead crude oil water cut detection and sampling device of the present utility model;

[0018] Figure 2 is a schematic internal structure diagram of the fixed pipe of the present utility model;

[0019] Figure 3 is a schematic internal structure diagram of the collection barrel of the present utility model;

[0020] Figure 4 is of the present utility model Figure 3 an enlarged schematic diagram of A in;

[0021] Figure 5 is a schematic internal structure diagram of the separation plate of the present utility model.

[0022] Reference numerals: 1, wellhead pipeline; 2, connecting pipe; 3, rotary valve; 4, collection barrel; 5, liquid outlet pipe; 6, transparent plate; 7, fixed pipe; 8, threaded rod; 9, limiting plate; 10, spring; 11, sliding rod; 12, baffle plate; 13, sealing gasket; 14, collection box; 15, upper cavity; 16, separation plate; 17, lower cavity; 18, fixed block; 19, sliding groove; 20, collection groove; 21, movable plate; 22, connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0024] Please refer to Figures 1-5 , the present utility model provides a technical solution: a wellhead crude oil water content detection and sampling device includes a wellhead pipeline 1. A collection bucket 4 is arranged on one side of the wellhead pipeline 1. A liquid outlet pipe 5 is fixedly connected to the surface of the collection bucket 4. A valve body is arranged inside the liquid outlet pipe 5. A transparent plate 6 is fixedly connected to the surface of the collection bucket 4. A collection box 14 is fixedly connected to the surface of the collection bucket 4. A liquid outlet pipe 5 is also fixedly connected to the lower end of the collection box 14. The internal structures of the two liquid outlet pipes 5 are the same. A threaded rod 8 is threadedly connected to the upper end of the collection bucket 4, and the threaded rod 8 penetrates into the interior of the collection bucket 4. A separation plate 16 is slidably connected inside the collection bucket 4. The surface of the separation plate 16 is set as an inclined surface, and the separation plate 16 divides the interior of the collection bucket 4 into an upper cavity 15 and a lower cavity 17. The lower cavity 17 is slightly larger than the upper cavity 15. A collection groove 20 is opened on the inner wall of the upper cavity 15, and the collection groove 20 penetrates into the interior of the collection box 14. The collection bucket 4 and the collection box 14 are interconnected. One end of the threaded rod 8 located inside the collection bucket 4 is rotatably connected to the surface of the separation plate 16. A fixed block 18 is fixedly connected to the inner wall of the upper cavity 15. A sliding groove 19 is opened on the surface of the fixed block 18. A movable plate 21 is slidably connected to the inner wall of the sliding groove 19. The surface of the movable plate 21 is slidably connected to the inner wall of the upper cavity 15. One side of the movable plate 21 away from the upper cavity 15 is fixedly connected to a connecting rod 22. One end of the connecting rod 22 away from the movable plate 21 is fixedly connected to the surface of the separation plate 16.

[0025] The valve body is a conventional structure, and no further explanation will be given here.

[0026] Through the setting of the transparent plate 6, it is convenient for the staff to observe the collection situation of the crude oil inside the collection bucket 4 from the outside.

[0027] Through the setting of the sliding groove 19, when the movable plate 21 moves, it always fits with the inner wall of the upper cavity 15, avoiding the situation that the movable plate 21 shakes during the movement.

[0028] When the dead oil enters the interior of the collection barrel 4, through the setting of the separation plate 16 and the collection tank 20, the dead oil flows along the surface of the separation plate 16 and enters the interior of the collection box 14 through the collection tank 20 to collect the dead oil. When the staff observes through the transparent plate 6 that the dead oil collection is completed, the threaded rod 8 is rotated, and the threaded rod 8 rotates and moves into the interior of the collection barrel 4. Then, the threaded rod 8 pushes the separation plate 16, causing the separation plate 16 to move into the interior of the lower cavity 17. As a result, the separation plate 16 no longer divides the upper cavity 15 and the lower cavity 17, and the upper cavity 15 and the lower cavity 17 communicate with each other. At the same time, the separation plate 16 drives the connecting rod 22 to move, and the connecting rod 22 drives the movable plate 21 to move. The movable plate 21 slides inside the sliding groove 19. When the upper cavity 15 and the lower cavity 17 communicate with each other, the movable plate 21 moves and covers the collection tank 20. Then, the movable plate 21 seals the collection tank 20. Thus, it is no longer necessary for the staff to carry two cans to separately receive the crude oil and the dead oil. At the same time, the crude oil and the dead oil are loaded and carried in one tank body, which is convenient for the staff to carry and uniformly process.

[0029] A connecting pipe 2 is fixedly connected to the surface of the wellhead pipeline 1. The wellhead pipeline 1 and the connecting pipe 2 communicate with each other. A rotary valve 3 is arranged on the surface of the connecting pipe 2. The upper end of the collection barrel 4 is fixedly connected with a fixed pipe 7. The inner wall of the fixed pipe 7 is threadedly connected to the surface of the connecting pipe 2.

[0030] Since the connecting pipe 2 and the fixed pipe 7 are threadedly connected, when the collection barrel 4 is rotated, the collection barrel 4 drives the fixed pipe 7 to rotate. Then, as the fixed pipe 7 rotates, the fixed pipe 7 is fixed to the connecting pipe 2.

[0031] The rotary valve 3 is a conventional structure, so no further explanation will be given to it.

[0032] A limiting plate 9 is fixedly connected to the inner wall of the fixed pipe 7. A sliding rod 11 is slidably connected inside the limiting plate 9, and the sliding rod 11 penetrates to the outside of the limiting plate 9. A spring 10 is fixedly connected inside the limiting plate 9. One end of the spring 10 away from the limiting plate 9 is fixedly connected to the sliding rod 11. One end of the sliding rod 11 located outside the limiting plate 9 is fixedly connected to a blocking plate 12. A sealing gasket 13 is fixedly connected to the bottom of the limiting plate 9.

[0033] When the fixed pipe 7 is fixed to the connecting pipe 2, the operator rotates the rotary valve 3. As a result, the rotary valve 3 no longer blocks the crude oil inside the wellhead pipeline 1. The crude oil enters the inside of the fixed pipe 7 through the connecting pipe 2. When the crude oil enters the inside of the fixed pipe 7, it squeezes the baffle plate 12. The baffle plate 12 moves under the force, creating a gap between the baffle plate 12 and the inside of the fixed pipe 7. The baffle plate 12 no longer blocks the crude oil inside the fixed pipe 7, and the crude oil enters the inside of the collection barrel 4 through the fixed pipe 7. At the same time, the movement of the baffle plate 12 pulls the sliding rod 11, and the sliding rod 11 moves to squeeze the spring 10. After the crude oil collection is completed, the operator rotates the rotary valve 3 in the opposite direction to close it. The crude oil no longer enters the inside of the connecting pipe 2 from the wellhead pipeline 1. As a result, the baffle plate 12 is no longer under force. Under the elastic force of the spring 10, the sliding rod 11 drives the baffle plate 12 to move, making the baffle plate 12 stick to the gasket 13 to seal the crude oil inside the collection barrel 4. This avoids the situation where when the operator seals the fixed pipe 7, the collection barrel 4 is accidentally knocked over, causing the crude oil inside the collection barrel 4 to flow out from the fixed pipe 7. At the same time, it is convenient for the operator to carry.

[0034] Working principle: When the dead oil enters the inside of the collection barrel 4, through the settings of the separation plate 16 and the collection groove 20, the dead oil flows along the surface of the separation plate 16 and enters the inside of the collection box 14 through the collection groove 20 to collect the dead oil. When the operator observes from the transparent plate 6 that the dead oil collection is completed, the threaded rod 8 is rotated. The threaded rod 8 rotates and moves into the inside of the collection barrel 4. As a result, the threaded rod 8 pushes the separation plate 16, making the separation plate 16 move into the lower cavity 17. Then the separation plate 16 no longer divides the upper cavity 15 and the lower cavity 17, and the upper cavity 15 and the lower cavity 17 communicate with each other. At the same time, the separation plate 16 drives the connecting rod 22 to move, and the connecting rod 22 drives the movable plate 21 to move. The movable plate 21 slides inside the chute 19. When the upper cavity 15 and the lower cavity 17 communicate with each other, the movable plate 21 moves to cover the collection groove 20. Then the movable plate 21 seals the collection groove 20.

[0035] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A device for detecting and sampling the water content of crude oil at the wellhead, comprising a wellhead pipeline (1), characterized in that: On one side of the wellhead pipe (1), there is a collection bucket (4). The surface of the collection bucket (4) is fixedly connected with a liquid outlet pipe (5). Inside the liquid outlet pipe (5), there is a valve body. The surface of the collection bucket (4) is fixedly connected with a collection box (14). The lower end of the collection box (14) is also fixedly connected with a liquid outlet pipe (5). The internal structures of the two liquid outlet pipes (5) are the same. The upper end of the collection bucket (4) is threadedly connected with a threaded rod (8), and the threaded rod (8) penetrates into the interior of the collection bucket (4). Inside the collection bucket (4), there is a separation plate (16) slidably connected. The separation plate (16) divides the interior of the collection bucket (4) into an upper chamber (15) and a lower chamber (17). The lower chamber (17) is slightly larger than the upper chamber (15). The inner wall of the upper chamber (15) is provided with a collection groove (20), and the collection groove (20) penetrates into the interior of the collection box (14). The collection bucket (4) and the collection box (14) are interconnected.

2. The wellhead crude oil water cut detection sampling device according to claim 1, characterized in that: The surface of the collection bucket (4) is fixedly connected with a transparent plate (6).

3. The sampling device for detecting the water content of crude oil at the wellhead according to claim 1, wherein: The surface of the separation plate (16) is set as an inclined plane.

4. The sampling device for detecting the water content of crude oil at the wellhead according to claim 1, characterized in that: One end of the threaded rod (8) located inside the collection bucket (4) is rotatably connected to the surface of the separation plate (16). The inner wall of the upper chamber (15) is fixedly connected with a fixed block (18). The surface of the fixed block (18) is provided with a sliding groove (19). Inside the inner wall of the sliding groove (19), there is a movable plate (21) slidably connected. The surface of the movable plate (21) is slidably connected to the inner wall of the upper chamber (15). One side of the movable plate (21) away from the upper chamber (15) is fixedly connected with a connecting rod (22). One end of the connecting rod (22) away from the movable plate (21) is fixedly connected to the surface of the separation plate (16).

5. The sampling device for detecting the water content of crude oil at the wellhead according to claim 4, wherein: The surface of the wellhead pipe (1) is fixedly connected with a connecting pipe (2). The wellhead pipe (1) and the connecting pipe (2) are interconnected. The upper end of the collection bucket (4) is fixedly connected with a fixed pipe (7). The inner wall of the fixed pipe (7) is threadedly connected to the surface of the connecting pipe (2).

6. The sampling device for detecting the water content of crude oil at the wellhead according to claim 5, wherein: A rotary valve (3) is provided on the surface of the connecting pipe (2).

7. The sampling device for detecting the water content of crude oil at the wellhead according to claim 5, characterized in that: The inner wall of the fixed pipe (7) is fixedly connected with a limiting plate (9). Inside the limiting plate (9), there is a sliding rod (11) slidably connected, and the sliding rod (11) penetrates to the outside of the limiting plate (9). Inside the limiting plate (9), there is a spring (10) fixedly connected. One end of the spring (10) away from the limiting plate (9) is fixedly connected to the sliding rod (11). One end of the sliding rod (11) located outside the limiting plate (9) is fixedly connected with a blocking plate (12).

8. The sampling device for detecting the water content of crude oil at the wellhead according to claim 7, characterized in that: A sealing gasket (13) is fixedly connected to the bottom of the limiting plate (9).

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