Whole tank sampler for oil well metering

Abstract

The utility model relates to the technical field of oil exploitation equipment, and discloses a whole tank sampler for oil well metering. The positioning sleeve and the plugging assembly are respectively mounted at the top and the bottom of the sampling tube; the bottom of the force application rod is connected with the plugging assembly, the top of the force application rod movably penetrates through the positioning sleeve, the force application rod is in clearance fit with the positioning sleeve, and the plugging assembly can be driven to close or open the bottom of the sampling pipe by sliding the force application rod up and down relative to the sampling pipe. Compared with the prior art, the sampling efficiency and the sampling amount are improved to a certain extent, the extracted sample integrates the characteristics of water-containing oil at different layers in the oil storage tank, and the sampling device has high comprehensiveness and representativeness.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, and in particular to a whole-tank sampler for oil well metering. Background Technology

[0002] In oil extraction operations, manual sampling is crucial for accurately understanding crude oil characteristics and effectively implementing production management. However, current manual sampling methods have many drawbacks. Currently, manual sampling relies primarily on operators holding sampling bottles, a process highly susceptible to fluctuations in well production, leading to resource waste, environmental pollution, and low sampling efficiency. When oil wells are gushing crude oil at high speeds, samples are prone to spillage; conversely, when wells are producing at low or intermittent rates, operators must wait for extended periods. Furthermore, manually collected samples only reflect the characteristics of crude oil at the moment of sampling, exhibiting significant bias and failing to comprehensively and accurately reflect the dynamic changes in crude oil. These problems not only reduce the accuracy of crude oil measurement but also negatively impact the optimization of extraction plans and the progress of intelligent extraction.

[0003] In existing technologies, oil is typically injected into a storage tank, and the production volume is calculated based on the sample inside the tank. For example, patent CN222436349U discloses a portable oil tank cross-section sampler. This sampler uses a telescopic mechanism to extend and retract the sampler body, and collects oil from the tank by opening and closing a sealing mechanism. However, in practical applications, the technical solution involved in this patent has some obvious defects. Specifically, the primary telescopic threaded rod and threaded section are connected by a mating connection, resulting in a sealed structure at the upper part of the sampler body. During actual sampling, due to the continuous compression of the gas inside the sampler, oil is difficult to enter the sampler smoothly, which greatly limits the sampling efficiency and sample volume. At the same time, this structural design may also lead to uneven sampling, thus adversely affecting the accuracy of the test results.

[0004] In view of this, how to overcome the limitations of the existing technology and optimize the structure of the sampler to ensure that oil can smoothly enter the sampler and improve sampling efficiency and accuracy has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The present invention aims to provide a whole-tank sampler for oil well metering, overcoming the shortcomings mentioned above.

[0006] In order to achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A whole-tank sampler for oil well metering includes:

[0008] Sampling tube;

[0009] Positioning sleeves and sealing assemblies respectively installed at the top and bottom of the sampling tube; and

[0010] The bottom is connected to the sealing assembly, and the top is movably inserted through the positioning sleeve. The force rod is in clearance fit with the positioning sleeve. Relative to the sampling tube, the force rod can drive the sealing assembly to close or open the bottom of the sampling tube by sliding it up and down.

[0011] Furthermore, the sealing assembly includes:

[0012] A connecting plate fixedly connected to the lower end of the side wall of the sampling tube; and

[0013] A sealing plate hinged to the connecting plate, the sealing plate selectively opening and closing the bottom of the sampling tube.

[0014] Furthermore, a connecting seat is fixedly connected to the middle of the upper surface of the sealing plate, and the lower end of the force-applying rod is rotatably connected to the connecting seat.

[0015] Furthermore, a sealing gasket is installed on the upper surface of the sealing plate, and the sealing gasket is selectively interference-fitted with the lower end of the sampling tube.

[0016] Furthermore, the top of the force-applying rod passes through the positioning sleeve and is provided with an external thread section, on which a nut is threadedly connected.

[0017] Furthermore, an operating rod is fixedly connected to the outer wall of the nut.

[0018] Furthermore, the positioning sleeve is a cylindrical structure with an opening facing downwards. The outer wall of the positioning sleeve is provided with external threads, and the upper end of the inner wall of the sampling tube is provided with internal threads. The upper end of the inner wall of the sampling tube and the outer wall of the positioning sleeve are threadedly connected.

[0019] Furthermore, it also includes: an operating frame fixedly connected to the upper end of the outer wall of the sampling tube, wherein the top of the force-applying rod sequentially passes through the positioning sleeve and the operating frame; and

[0020] An elastic element is connected at both ends to the operating frame and the force rod, respectively, and the elastic element is used to drive the force rod to move downward relative to the sampling tube.

[0021] Furthermore, the elastic element is a compression spring sleeved around the force-applying rod; a positioning ring is fixedly connected to the outer wall of the force-applying rod, and the top of the force-applying rod passes through the positioning sleeve, the positioning ring, the compression spring and the operating frame in sequence. One end of the compression spring is connected to the positioning ring and the other end is connected to the operating frame.

[0022] Furthermore, a positioning washer is fitted around the periphery of the force-applying rod, and the positioning washer is located between the other end of the compression spring and the operating frame.

[0023] Compared with the prior art, this utility model has at least the following advantages:

[0024] In this invention, the force-applying rod and the positioning sleeve are fitted with a clearance. When the force-applying rod drives the sealing assembly to open the bottom of the sampling tube, and the sampling tube is then vertically lowered into the oil storage tank, the upper part of the sampling tube is connected to the outside air, preventing gas compression and allowing oil to smoothly enter the interior of the sampling tube. Compared to existing technologies, this invention improves sampling efficiency and quantity to a certain extent. The extracted sample comprehensively reflects the water-oil characteristics of different layers within the oil storage tank, exhibiting high comprehensiveness and representativeness. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the whole tank sampler for oil well metering of this utility model;

[0027] Figure 2 This is a cross-sectional view of Embodiment 1 of the whole-tank sampler for oil well metering of this utility model;

[0028] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of the whole tank sampler for oil well metering of this utility model;

[0029] Figure 4 This is a cross-sectional view of Embodiment 2 of the whole-tank sampler for oil well metering of this utility model.

[0030] Reference numerals in the attached drawings: 1. Sampling tube; 2. Positioning sleeve; 3. Force rod; 4. Connecting plate; 5. Sealing plate; 6. Connecting seat; 7. Sealing gasket; 8. Nut; 9. Operating rod; 10. Operating frame; 11. Compression spring; 12. Positioning ring; 13. Positioning washer. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1:

[0034] Reference Figure 1-2 This utility model provides a whole-tank sampler for oil well metering, comprising a sampling tube 1, a positioning sleeve 2, a sealing assembly, and a force-applying rod 3. The sampling tube 1 is the main body of the whole-tank sampler and has a tubular structure. The positioning sleeve 2 is installed at the top of the sampling tube 1 and is a downward-opening cylindrical structure with external threads on its outer wall, which connect to the internal threads at the upper end of the inner wall of the sampling tube 1 to ensure structural stability. The sealing assembly is installed at the bottom of the sampling tube 1 and is used to control the opening and closing of the bottom of the sampling tube 1. The bottom of the force-applying rod 3 is connected to the sealing assembly, and its top moves through the positioning sleeve 2. The force-applying rod 3 and the positioning sleeve 2 are in clearance fit. By moving the force-applying rod 3 up and down, the sealing assembly can be driven to close or open the bottom of the sampling tube 1.

[0035] The sealing assembly includes a connecting plate 4 fixedly connected to the lower end of the side wall of the sampling tube 1 and a sealing plate 5 hinged to the connecting plate 4. The connecting plate 4 is fixedly connected to the lower end of the outer side wall of the sampling tube 1 by screws or a hinge. One end of the sealing plate 5 is hinged to the lower end of the connecting plate 4. A connecting seat 6 is fixedly connected to the middle of the upper surface of the sealing plate 5, and the lower end of the force-applying rod 3 is rotatably connected to the connecting seat 6. When the force-applying rod 3 moves downward, the sealing plate 5 rotates around the hinge point of the connecting plate 4 under the action of the force-applying rod 3, thereby opening the bottom of the sampling tube 1. When the force-applying rod 3 moves upward, the sealing plate 5 fits tightly against the bottom of the sampling tube 1 under the action of the force-applying rod 3, achieving a seal. A sealing gasket 7 is installed on the upper surface of the sealing plate 5, and the connecting seat 6 is set through the sealing gasket 7. The sealing gasket 7 is selectively press-fitted with the lower end of the sampling tube 1 to prevent liquid leakage during sampling, ensuring the integrity and accuracy of the sample.

[0036] The top of the force-applying rod 3 passes through the positioning sleeve 2 and has an external thread section, on which a nut 8 is threadedly connected. An operating rod 9 is fixedly connected to the outer wall of the nut 8. The operating rod 9 is designed to facilitate the operator to apply rotational force. By rotating the operating rod 9, the nut 8 can be rotated, thereby realizing the up and down movement of the force-applying rod 3.

[0037] In use, by controlling the operating lever 9 to rotate the nut 8, it moves upward relative to the external thread section. After moving a certain distance, press the operating lever 9 downward, which drives the force rod 3 to move downward, thereby opening the bottom of the sampling tube 1. Conversely, by controlling the operating lever 9 to rotate the nut 8, it moves downward relative to the external thread section. The nut 8 abuts against the top surface of the positioning sleeve 2, which drives the force rod 3 to move upward, thereby closing the bottom of the sampling tube 1.

[0038] Example 2:

[0039] The difference between this embodiment and Embodiment 1 is that this utility model also includes an operating frame 10 and elastic components.

[0040] Reference Figure 3-4 To further optimize the operational performance of the sampler, this invention also includes an operating frame 10 fixedly connected to the upper end of the outer wall of the sampling tube 1. The top of the force-applying rod 3 sequentially passes through the positioning sleeve 2 and the operating frame 10. The two ends of the elastic element are respectively connected to the operating frame 10 and the force-applying rod 3, and the elastic element is used to drive the force-applying rod 3 to move downward relative to the sampling tube 1.

[0041] Specifically, the elastic element is a compression spring 11 sleeved around the force-applying rod 3. A positioning ring 12 is fixedly connected to the outer wall of the force-applying rod 3. The top of the force-applying rod 3 passes through the positioning sleeve 2, the positioning ring 12, the compression spring 11, and the operating frame 10 in sequence. One end of the compression spring 11 is connected to the positioning ring 12, and the other end is connected to the operating frame 10. A positioning washer 13 is also sleeved around the force-applying rod 3. The positioning washer 13 is located between the other end of the compression spring 11 and the operating frame 10, and is used to further fix the position of the compression spring 11 to ensure the stability and reliability of the elastic element.

[0042] By controlling the operating lever 9 to rotate the nut 8, it moves upward relative to the external thread section. Under the action of the compression spring 11, the force rod 3 gradually moves downward, thereby opening the bottom of the sampling tube 1. This reduces the number of steps required for the operator to press down the operating lever 9. Conversely, by controlling the operating lever 9 to rotate the nut 8, it overcomes the force of the compression spring 11 and moves downward relative to the external thread section, thereby closing the bottom of the sampling tube 1.

[0043] The operating steps of the sampler of this utility model are as follows:

[0044] a. The operator holds the operating lever 9, rotates the nut 8, and moves the force-applying lever 3 downward. The sealing plate 5 rotates around the hinge point of the connecting plate 4 under the action of the force-applying lever 3, opening the bottom of the sampling tube 1.

[0045] b. Lower the sampler vertically and slowly into the oil well storage tank so that the oil liquid can smoothly enter the sampling tube 1 until the sampler is lowered to the bottom of the tank, completing the collection of crude oil from different layers in the storage tank from top to bottom.

[0046] c. After sampling, rotate nut 8 in the opposite direction to move force rod 3 upward relative to sampling tube 1. Under the action of force rod 3, sealing plate 5 fits tightly against the bottom of sampling tube 1. Sealing ring 7 is press-fitted with sealing plate 5 to ensure that the sample does not leak.

[0047] d. Slowly remove the sampler from the storage tank to complete the oil sampling.

[0048] Through the above operations, the extracted sample comprehensively reflects the water- and oil-bearing characteristics of different layers within the storage tank, exhibiting high comprehensiveness and representativeness. By conducting professional water-bearing analysis on this sample, technicians can accurately calculate the overall water-bearing status of the oil well over a period of time, significantly improving the accuracy of oil well metering data and providing reliable data support for oil well production management.

[0049] This utility model, through the linkage design of the force-applying rod 3 and the sealing component, allows the operator to open and close the bottom of the sampling tube 1 simply by rotating the operating rod 9, which greatly simplifies the sampling operation process and improves work efficiency.

[0050] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A whole-tank sampler for oil well metering, characterized in that, include: Sampling tube (1); Positioning sleeves (2) and sealing components are respectively installed at the top and bottom of the sampling tube (1); as well as The bottom is connected to the sealing assembly, and the top moves through the force rod (3) of the positioning sleeve (2). The force rod (3) is in clearance fit with the positioning sleeve (2). Relative to the sampling tube (1), the force rod (3) can drive the sealing assembly to close or open the bottom of the sampling tube (1) by sliding the force rod (3) up and down.

2. The whole-tank sampler for oil well metering according to claim 1, characterized in that, The blocking assembly includes: A connecting plate (4) fixedly connected to the lower end of the side wall of the sampling tube (1); and A sealing plate (5) is hinged to the connecting plate (4), and the sealing plate (5) selectively opens and closes the bottom of the sampling tube (1).

3. The whole-tank sampler for oil well metering according to claim 2, characterized in that, A connecting seat (6) is fixedly connected to the middle of the upper surface of the sealing plate (5), and the lower end of the force-applying rod (3) is rotatably connected to the connecting seat (6).

4. The whole-tank sampler for oil well metering according to claim 3, characterized in that, A sealing gasket (7) is installed on the upper surface of the sealing plate (5), and the sealing gasket (7) is selectively interference-fitted with the lower end of the sampling tube (1).

5. The whole-tank sampler for oil well metering according to claim 2, characterized in that, The top of the force-applying rod (3) passes through the positioning sleeve (2) and is provided with an external thread section, on which a nut (8) is threadedly connected.

6. The whole-tank sampler for oil well metering according to claim 5, characterized in that, An operating rod (9) is fixedly connected to the outer wall of the nut (8).

7. The whole-tank sampler for oil well metering according to claim 1, characterized in that, The positioning sleeve (2) is a cylindrical structure with the opening facing downwards. The outer wall of the positioning sleeve (2) is provided with external threads, and the upper end of the inner wall of the sampling tube (1) is provided with internal threads. The upper end of the inner wall of the sampling tube (1) is threadedly connected to the outer wall of the positioning sleeve (2).

8. The whole-tank sampler for oil well metering according to any one of claims 1 to 7, characterized in that, Also includes: An operating frame (10) is fixedly connected to the upper end of the outer wall of the sampling tube (1), and the top of the force-applying rod (3) moves sequentially through the positioning sleeve (2) and the operating frame (10); and An elastic element is connected at both ends to the operating frame (10) and the force rod (3), respectively. The elastic element is used to drive the force rod (3) to move downward relative to the sampling tube (1).

9. The whole-tank sampler for oil well metering according to claim 8, characterized in that, The elastic element is a compression spring (11) sleeved around the force-applying rod (3); a positioning ring (12) is fixedly connected to the outer wall of the force-applying rod (3); the top of the force-applying rod (3) passes through the positioning sleeve (2), the positioning ring (12), the compression spring (11) and the operating frame (10) in sequence; one end of the compression spring (11) is connected to the positioning ring (12) and the other end is connected to the operating frame (10).

10. The whole-tank sampler for oil well metering according to claim 9, characterized in that, The force-applying rod (3) is fitted with a positioning washer (13) on its periphery, and the positioning washer (13) is located between the other end of the compression spring (11) and the operating frame (10).

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