Water controlling and oil stabilizing device and production pipe column

Abstract

The water controlling and oil stabilizing device comprises a Tesla valve body fixedly arranged between an upper connector and a lower connector, a Tesla flow channel is formed in the outer wall of the Tesla valve body, and the outer wall of the Tesla valve body is sleeved with an outer barrel used for sealing the Tesla flow channel; the Tesla valve body is provided with a fluid through hole which is communicated with the upper end of the Tesla flow channel and a central flow channel of the Tesla valve body; a sand control pipe is fixedly arranged between the outer barrel and the lower connector, the lower end of the Tesla flow channel is communicated with an annular space among the outer barrel, the sand control pipe and the Tesla valve body, and a fluid channel communicated with the annular space and the outer space of the sand control pipe is arranged on the sand control pipe. By adopting the Tesla flow channel, the retarding effect of the Tesla flow channel on high water content is greater than that of low water content, so that the water content of a total product in an oil pipe is indirectly reduced, and low-cost control of the water content of the product is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and natural gas exploitation, and particularly relates to a water control and oil stabilization device and a production pipe string. Background Art

[0002] Water content has always been a key factor affecting oil and gas well production and efficiency. Currently, there are over 30 offshore oilfields in China with edge and bottom water reservoirs, with over 50% of these wells containing horizontal wells. This represents a continuously increasing water content. As more oilfields enter the mid-to-late stages of development, some blocks have entered a high water content phase. Liquid production in some wells is declining, while water content continues to rise, exceeding 90% in some wells. High water content in wells not only increases extraction and subsequent processing costs but also reduces crude oil production. Therefore, controlling water content and stabilizing oil production has become a key approach for major oilfields to increase production and reduce costs.

[0003] Currently, water control and oil stabilization devices face several significant challenges. First, the accuracy and adaptability of the devices still need to be improved, making it difficult to maintain stable and effective water control and oil stabilization in complex and changing reservoir environments. Second, the devices are expensive to maintain, and are prone to failures during long-term operation. Repairing and replacing components is not only time-consuming and labor-intensive, but also significantly increases costs. Furthermore, some devices lack sufficient intelligence, making it impossible to accurately monitor and adjust operating parameters in real time, making it difficult to meet the challenges posed by reservoir dynamics.

[0004] Therefore, in order to solve all or part of the above problems, a water control and oil stabilization device is urgently needed to achieve oil-water separation in the oil reservoir. Summary of the Invention

[0005] In order to solve all or part of the above problems, the purpose of the present invention is to provide a water control and oil stabilization device and a production tubing string. The water control and oil stabilization device of the present invention reduces the water content of the total output in the oil pipe, thereby achieving low-cost control of the water content of the output.

[0006] According to one aspect of the present invention, a water control and oil stabilization device is provided, which is characterized in that it includes a Tesla valve body fixedly arranged between an upper joint and a lower joint, a Tesla flow channel is opened on the outer wall of the Tesla valve body, an outer cylinder body for sealing the Tesla flow channel is sleeved on the outer wall of the Tesla valve body, and the Tesla valve body is provided with a fluid through hole connecting the upper end of the Tesla flow channel and the central flow channel of the Tesla valve body; a sand control pipe is fixedly arranged between the outer cylinder body and the lower joint, the lower end of the Tesla flow channel is connected to the annulus between the outer cylinder body, the sand control pipe and the Tesla valve body, and the sand control pipe is provided with a fluid channel connecting the annulus and the space outside the sand control pipe.

[0007] Furthermore, the Tesla valve body includes a valve body body, and a convex ring extending from the upper end to the middle of the valve body body is provided on the outer wall of the valve body body, the upper end of the valve body body is threadedly connected to the upper joint, and the lower end of the valve body body is threadedly connected to the lower joint; the Tesla flow channel is provided on the convex ring, and the outer cylinder body is sleeved outside the convex ring.

[0008] Furthermore, the annulus is the space between the valve body and the sand control pipe, and between the valve body and the outer cylinder below the convex ring.

[0009] Furthermore, water control particles for sand control and water control are arranged in the annulus.

[0010] Furthermore, a filter is provided in the annular space between the convex ring and the water-control particles.

[0011] Furthermore, the Tesla valve body and the outer cylinder are interference fit to seal the Tesla flow channel.

[0012] Furthermore, the outer cylinder and the sand control pipe, and the sand control pipe and the lower joint are both threadedly connected.

[0013] Furthermore, the fluid channel on the sand control pipe is a rectangular hole whose length is much greater than its width.

[0014] Furthermore, an internal thread structure connected to the pipe column above the upper joint is provided in the inner hole of the upper joint, and an external thread structure connected to the pipe column below the lower joint is provided on the outer wall of the lower joint.

[0015] The present invention also provides a production tubing string, which comprises any one of the above-mentioned water control and oil stabilization devices.

[0016] As can be seen from the above technical solutions, the water control and oil stabilization device and production string provided by the present invention have the following beneficial effects:

[0017] The present invention adopts Tesla flow channel, so that its blocking effect on high water content is greater than that on low water content, thereby indirectly reducing the water content of the total output in the oil pipe and achieving low-cost control of the water content of the output. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of a water control and oil stabilization device according to an embodiment of the present invention;

[0019] The reference numerals in the figure are: upper joint 1, internal thread structure 11, Tesla valve body 2, valve body 21, convex ring 22, fluid through hole 23, Tesla flow channel 24, outer cylinder 3, filter screen 4, sand control pipe 5, fluid channel 51, lower joint 6, external thread structure 61, annulus 7. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, structure and function of the present invention, a water control and oil stabilization device and a production string of the present invention are further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, it shows a water control and oil stabilization device according to an embodiment of the present invention, including a Tesla valve body 2 fixedly arranged between an upper joint 1 and a lower joint 6, a Tesla flow channel 24 is opened on the outer wall of the Tesla valve body 2, an outer cylinder 3 for sealing the Tesla flow channel 24 is sleeved on the outer wall of the Tesla valve body 2, and a fluid through hole 23 connecting the upper end of the Tesla flow channel 24 and the central flow channel of the Tesla valve body 2 is provided on the Tesla valve body 2; a sand control pipe 5 is fixedly arranged between the outer cylinder 3 and the lower joint 6, the lower end of the Tesla flow channel 24 is connected to the annulus 7 between the outer cylinder 3, the sand control pipe 5 and the Tesla valve body 2, and the sand control pipe 5 is provided with a fluid channel 51 connecting the annulus 7 and the space outside the sand control pipe 5.

[0022] In the water control and oil stabilization device of this embodiment, during use, oil and water enter the annulus 7 through the fluid passage 51 on the sand control tube 5, ascend along the annulus 7 to the Tesla flow channel 24, and then enter the central flow channel of the Tesla valve body 2 through the fluid through-hole 23 at the upper end of the Tesla flow channel 24. As the oil and water pass through the Tesla flow channel 24, the Tesla flow channel 24 performs a water control process on the oil and water, thereby reducing the water content in the oil and water.

[0023] Regarding the Tesla flow channel 24 of the embodiment of the present invention: it utilizes the characteristics that when water and oil flow at the same flow rate, water has a higher density and lower viscosity than oil, and has a larger Reynolds number during flow, and the inertial force is dominant, so that oil can pass through the Tesla flow channel 24 more easily, thereby achieving the effect of controlling water and stabilizing oil.

[0024] Regarding the Tesla flow channel 24, the following is explained again: after the oil and water flow into the Tesla flow channel 24, the "self-impact" effect of the water at the confluence point is stronger, the local head loss is greater, and the flow of water in the production direction is restricted. For the oil dominated by the viscous force, it is easier to pass through the Tesla flow channel 24. At the same time, the "self-impact" effect of the oil when flowing through the confluence point is much smaller, so the pressure drop is very small. As a result, the Tesla flow channel 24 has little effect on the oil flow rate, making it easier for high-viscosity oil to pass through, thereby reducing the water content in the reservoir and achieving the effect of water control and stable flow.

[0025] Among them, the Tesla valve body 2 includes a valve body body 21, and a convex ring 22 extending from its upper end to its middle is provided on the outer wall of the valve body body 21. The upper end of the valve body body 21 is threadedly connected to the upper joint 1, and the lower end of the valve body body 21 is threadedly connected to the lower joint 6; the Tesla flow channel 24 is provided on the convex ring 22, and the outer cylinder 3 is sleeved on the outside of the convex ring 22.

[0026] The Tesla valve body 2 of this embodiment includes a valve body 21 and a convex ring 22. The upper end of the valve body 21 is threadedly connected to the upper joint 1, and the lower end of the valve body 21 is threadedly connected to the lower joint 6; the convex ring 22 extends from the upper end of the valve body 21 to the middle part of the valve body 21. The setting of the convex ring 22 forms the aforementioned annulus 7 between the valve body 21 below the convex ring 22 and the sand control pipe 5, and between the valve body 21 and the outer cylinder 3.

[0027] In one embodiment, water control particles for sand control and water control are arranged in the annulus 7 .

[0028] The water control particles of this embodiment are used to prevent sand and water, thereby preventing sand from entering the Tesla flow channel 24 and reducing the water content in the oil reservoir.

[0029] For this embodiment, during specific use, oil and water enter the annulus 7 from the fluid channel 51 on the sand control tube 5, and after preliminary water control by the water control particles in the annulus 7, they ascend along the annulus 7 to the Tesla flow channel 24, and then after further water control by the Tesla flow channel 24, they enter the central flow channel of the Tesla valve body 2 through the fluid through hole 23 at its upper end.

[0030] In one embodiment, a filter screen 4 is provided in the annulus 7 between the protruding ring 22 and the water-control particles.

[0031] The filter screen 4 of this embodiment is used to filter particles in oil and water. The filter screen 4 of this embodiment is pressed against the lower part of the convex ring 22 by controlling the water particles.

[0032] In one embodiment, the Tesla valve body 2 and the outer cylinder 3 are interference-fitted to seal the Tesla flow channel 24 .

[0033] In specific implementation, the outer cylinder is a cylindrical structure, which is heated using thermal expansion technology and installed outside the Tesla valve body 2, that is, outside the convex ring 22, so that after cooling, an interference fit is formed between it and the outer surface of the valve body, thereby sealing the Tesla flow channel 24 so that it has complete Tesla flow channel 24 characteristics.

[0034] In one embodiment, the outer cylinder 3 and the sand control tube 5 , and the sand control tube 5 and the lower joint 6 are both connected by threads.

[0035] The arrangement of this embodiment facilitates the disassembly of the sand control pipe 5 and the lower joint 6 , thereby facilitating the replacement of the water control particles in the annulus 7 .

[0036] In one embodiment, the fluid channel 51 on the sand control tube 5 is a rectangular hole with a length much greater than a width.

[0037] In this embodiment, the fluid channel 51 on the sand control pipe 5 is configured as a rectangular hole with a length much greater than a width, that is, a slit-shaped rectangular hole, so as to achieve the purpose of preliminarily filtering solid particles in oil and water.

[0038] In one embodiment, an internal thread structure 11 for connecting with the pipe string above the upper connector 1 is provided in the inner hole of the upper connector 1. The provision of the internal thread structure 11 facilitates the connection of the upper connector 1 with the pipe string above the upper connector.

[0039] In one embodiment, an external thread structure 61 for connecting to the pipe column below the lower connector 6 is provided on the outer wall of the lower connector 6. The provision of the external thread structure 61 facilitates the connection of the lower connector 6 to the pipe column below the lower connector 6.

[0040] This embodiment adopts the structural design of the Tesla flow channel 24, so that its blocking effect on high water content is greater than that on low water content, thereby indirectly reducing the water content of the total output in the oil pipe and achieving low-cost control of the output water content.

[0041] An embodiment of the present invention further provides a production tubing string, which includes the water control and oil stabilization device according to any one of the above embodiments.

[0042] The production string of the embodiment of the present invention adopts the structural design of the Tesla flow channel, so that its blocking effect on high water content is greater than that on low water content, thereby indirectly reducing the water content of the total output in the oil pipe and achieving low-cost control of the water content of the output.

[0043] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0044] In addition, the terms "one", "two", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically limited.

[0045] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A water control and oil stabilization device, characterized in that: The Tesla valve body comprises a Tesla valve body fixedly arranged between an upper joint and a lower joint, a Tesla flow channel being opened on the outer wall of the Tesla valve body, an outer cylinder body for sealing the Tesla flow channel being sleeved on the outer wall of the Tesla valve body, and a fluid through hole connecting the upper end of the Tesla flow channel and the central flow channel of the Tesla valve body; a sand control pipe is fixedly arranged between the outer cylinder body and the lower joint, the lower end of the Tesla flow channel is connected with the annulus between the outer cylinder body, the sand control pipe and the Tesla valve body, and the sand control pipe is provided with a fluid channel connecting the annulus and the space outside the sand control pipe.

2. The water control and oil stabilization device according to claim 1, characterized in that: The Tesla valve body includes a valve body, and a convex ring extending from the upper end to the middle of the valve body is provided on the outer wall of the valve body, the upper end of the valve body is threadedly connected to the upper joint, and the lower end of the valve body is threadedly connected to the lower joint; the Tesla flow channel is provided on the convex ring, and the outer cylinder is sleeved outside the convex ring.

3. The water control and oil stabilization device according to claim 2, characterized in that: The annulus is the space between the valve body and the sand control pipe, and between the valve body and the outer cylinder below the convex ring.

4. The water control and oil stabilization device according to claim 3, characterized in that: Water control particles for sand control and water control are arranged in the annulus.

5. The water control and oil stabilization device according to claim 4, characterized in that: A filter is provided in the annular space between the convex ring and the water-control particles.

6. The water control and oil stabilization device according to claim 1, characterized in that: The Tesla valve body and the outer cylinder are interference-fitted to seal the Tesla flow channel.

7. The water control and oil stabilization device according to claim 1, characterized in that: The outer cylinder and the sand control pipe, and the sand control pipe and the lower joint are both threadedly connected.

8. The water control and oil stabilization device according to claim 1, characterized in that: The fluid channel on the sand control pipe is a rectangular hole with a length much greater than a width.

9. The water control and oil stabilization device according to claim 1, characterized in that: An internal thread structure connected to the pipe column above the upper joint is provided in the inner hole of the upper joint, and an external thread structure connected to the pipe column below the lower joint is provided on the outer wall of the lower joint.

10. A production string, characterized in that: It comprises the water control and oil stabilization device according to any one of claims 1 to 9.

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