Oil well sand control bridge body adaptive to intelligent bottom-hole regulator

Abstract

The oil well sand prevention bridge through body is sequentially provided with an upper connector, a bridge through seat and a lower connector from top to bottom, the bridge through seat is provided with a first cavity, a second cavity, an eccentric hole and a side hole, the inner wall of the first cavity is fixedly connected with a ball seat cylinder in a sealed mode, and a first center channel is formed in the ball seat cylinder; a gap is formed between the ball seat cylinder and the upper joint to form a first annular channel, and the inner wall of the second cavity is fixedly and hermetically connected with the lower joint; a connecting piece is further fixedly connected below the bridge through seat in a sealed mode, and a gap is formed between the connecting piece and the lower connector to form a second annular channel. The second annular channel is communicated with the outside of the device, and a sand-prevention filtering mechanism is arranged at the flow inlet; according to the utility model, upper-layer fluid and lower-layer fluid are shunted through the independent double-fluid channel, so that layered testing and regulation are facilitated; and meanwhile, a sand prevention filtering mechanism is arranged to remove sand grains, and the sand grains are effectively prevented from abrading and blocking equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production technology, in particular to an oil well sand prevention bridge body adapted to an intelligent production distributor. Background Art

[0002] With the rapid development of industry and the continued growth in oil demand, stratified oil production technology has been widely adopted in the oil production sector. This technology enables stratified testing and regulation of multi-layer reservoirs, effectively resolving the difficulty in accurately obtaining production data for each layer in conventional oil production processes. The production controller controls stratified testing and regulation of multi-layer reservoirs, achieving pressure balance, monitoring flow and pressure data, and flexibly responding to varying production needs to ensure safe production. The production controller, when used in conjunction with the bridge, enables more accurate acquisition of production data for each layer and effective regulation, which is crucial for improving oil production efficiency.

[0003] However, the following problems still exist during the use of bridge bodies: First, existing bridge bodies often use a single flow channel structure, resulting in mixed flow of the bottom layer fluid and the current layer fluid, making effective diversion and transportation impossible, and failing to meet the requirements of stratified oil production for independent fluid transportation. Second, for traditional tools adapted for intelligent production distributors, their sand control mainly relies on a simple screen structure for filtration. The filter layer lacks effective protection, is easily damaged in complex well conditions, and has poor sand control effectiveness. Once the filter layer is damaged, a large amount of sand particles will enter the production distributor along with the fluid, causing damage to the equipment. Utility Model Content

[0004] In response to the above-mentioned defects in the existing technology, an oil well sand prevention bridge adapted to an intelligent production distributor is provided, which can divert the bottom fluid and the intra-layer fluid and effectively prevent sand particles from entering.

[0005] The technical solutions adopted by the present invention to solve the above technical problems are:

[0006] The cam is connected to the bottom of the cam by a threaded hole, and the threaded hole is connected to the bottom of the cam by a threaded hole, so that the cam can pass smoothly.

[0007] According to the above technical solution, the sand prevention and filtering mechanism is arranged at the inlet of the second annular channel through a protective seat, and the protective seat is fixedly and sealedly connected to the connecting piece.

[0008] According to the above technical solution, the sand-proof filtering mechanism includes a filtering layer and a protective structure, and the protective structure is arranged outside the filtering layer.

[0009] According to the above technical solution, the protective structure is a protective steel net provided with a plurality of small holes.

[0010] According to the above technical solution, there are multiple eccentric holes and side holes, which are evenly distributed on the bridge seat.

[0011] According to the above technical solution, a movable sealing ball is provided in the ball seat tube, and the diameter of the sealing ball is larger than the diameter of the first cavity.

[0012] According to the above technical solution, the fixed sealing connection between the upper joint, the bridge seat, the lower joint, the ball seat tube, the connecting piece and the protective seat is a threaded connection.

[0013] According to the above technical solution, at least one sealing ring is provided at the threaded connection.

[0014] The utility model has the following beneficial effects:

[0015] 1. Two independent first fluid channels and second fluid channels are designed inside the oil well sand control bridge, which can transport upper layer fluid and lower layer fluid respectively, realize the diversion of fluids in different layers, and can obtain oil production data of each layer more accurately, facilitate precise monitoring and independent regulation of different layers, and improve the efficiency of oil well oil extraction.

[0016] 2. A sand-proof filtering mechanism is provided at the inlet of the second annular channel, which adopts double protection of filter layer and protective steel mesh. Among them, the external protective steel mesh serves as the first line of defense, which can effectively intercept sand particles with larger particle sizes, while also protecting the internal filter layer and extending the service life of the filter layer; the internal filter layer serves as the second line of defense, which can further filter out fine sand particles, ensure the purity of the fluid, and effectively prevent sand particles from wearing and clogging the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic structural diagram of an oil well sand control bridge adapted to an intelligent production distributor provided in an embodiment of the present invention;

[0019] In the figure: 1. Upper joint; 11. First annular channel; 2. Bridge seat; 21. First cavity; 22. Second cavity; 23. Eccentric hole; 24. Side hole; 3. Lower joint; 31. Second center channel; 32. Second annular channel; 4. Ball seat cylinder; 41. First center channel; 42. Sealing ball; 5. Connector; 6. Protective seat; 7. Protective steel mesh; 8. Filter layer; 9. Sealing ring. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0024] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] like Figure 1As shown, the utility model provides an oil well sand control bridge body adapted to an intelligent production distributor, which is provided with an upper joint 1, a bridge seat 2 and a lower joint 3 from top to bottom, and mainly includes a sand control filtering mechanism, a connector 5 and a ball seat tube 4. Two independent first fluid channels and second fluid channels are designed inside the device. The first fluid channel is connected to the outside of the device and can transport upper fluid. The second fluid channel is connected to the lower oil pipe and can transport lower fluid, realizing the diversion of fluids in different layers, and can more accurately obtain the oil production data of each layer, which is convenient for precise monitoring and independent regulation of different layers, thereby improving the efficiency of oil well oil extraction.

[0027] In this embodiment, the upper and lower joints 1 and 3 are connected to the upper and lower oil pipes, respectively. A second central channel 31 is defined within the lower joint 3, allowing lower fluid to flow directly through the lower oil pipe into the first central channel 41. The lower joint 3 utilizes a variable diameter design, with a smaller diameter at the top, to facilitate the formation of a second annular channel 32 between it and the connector 5.

[0028] In this embodiment, the bridge seat 2 is arranged between the upper joint 1 and the lower joint 3. The bridge seat 2 and the upper joint 1 are fixedly connected by threads. At least one sealing ring 9 is provided on the facing circumferential surfaces of the bridge seat 2 and the upper joint 1 to increase the sealing of the connection and prevent fluid leakage. The bridge seat 2 is provided with a first cavity 21, a second cavity 22, a plurality of eccentric holes 23 and a plurality of side holes 24. The first cavity 21 is located at the upper end of the bridge seat 2, and its inner wall is fixedly connected to the ball seat tube 4 by a thread, and at least one sealing ring 9 is provided on the facing circumference of the inner wall of the first cavity 21 and the ball seat tube 4; the second cavity 22 is located at the lower end of the bridge seat 2, and its inner wall is fixedly connected to the lower joint 3 by a thread, and at least one sealing ring 9 is provided on the facing circumference of the inner wall of the second cavity 22 and the lower joint 3; a plurality of eccentric holes 23 and a plurality of side holes 24 are evenly distributed on the bridge seat 2; the first cavity 21 and the second cavity 22 are not connected, a plurality of the eccentric holes 23 pass through the bridge seat 2, and a plurality of the side holes 24 are connected with the first cavity 21.

[0029] In this embodiment, the lower end of the ball seat tube 4 is fixedly connected to the first cavity 21 on the bridge seat 2 through a thread. The ball seat tube 4 is located inside the upper joint 1, and there is a gap between it and the upper joint 1, forming a first annular channel 11. The first annular channel 11 is connected to the eccentric hole 23 on the bridge seat 2; a first center channel 41 is provided inside the ball seat tube 4, and the first center channel 41 is connected to the first cavity 21 on the bridge seat 2.

[0030] In this embodiment, a movable sealing ball 42 is provided inside the ball seat tube 4. The diameter of the sealing ball 42 is larger than the diameter of the first cavity 21 on the bridge seat 2, and can block the first cavity 21 to prevent fluid backflow.

[0031] In this embodiment, the upper end of the connecting member 5 is fixedly connected to the bridge seat 2 by a thread, and at least one sealing ring 9 is provided on the facing circumferential surfaces of the connecting member 5 and the bridge seat 2; the lower end of the connecting member 5 is sleeved on the outside of the lower joint 3, and there is a gap between the connecting member 5 and the lower joint 3, forming a second annular channel 32, which is connected to the outside of the device and can allow the upper layer fluid outside the device to penetrate, and the other end is connected to the side hole 24 on the bridge seat 2.

[0032] In this embodiment, the sand-proof filtering mechanism is arranged at the inlet of the second annular channel 32 through a protective seat 6. The protective seat 6 is fixedly connected to the lower end of the connecting member 5 through a thread. At least one sealing ring 9 is provided on the facing circumferential surfaces of the protective seat 6 and the connecting member 5; the sand-proof filtering mechanism includes a filter layer 8 and a protective structure. The protective structure is arranged outside the filter layer 8, wherein the external protective structure is a protective steel mesh 7 with multiple small holes. The protective steel mesh 7 serves as the first line of defense and can effectively intercept sand particles with larger particle sizes. At the same time, it can also protect the internal filter layer 8 and extend the service life of the filter layer 8. The internal filter layer 8 serves as the second line of defense and can further filter out fine sand particles, ensure the purity of the fluid, and effectively prevent sand particles from causing wear and blockage.

[0033] In summary, the first central channel 41, first cavity 21, side hole 24, and second annular channel 32 are sequentially connected to form a first fluid channel for the flow of the upper fluid. The first annular channel 11, eccentric hole 23, second cavity 22, and second central channel 31 are sequentially connected to form a second fluid channel for the flow of the lower fluid. The upper and lower fluids flow independently, facilitating layered testing and regulation. The double-layer protective structure of protective steel mesh 7 and filter layer 8 effectively removes sand particles from the fluid, ensuring fluid purity. This oil well sand control bridge has the advantages of simple structure, strong practicality, and excellent sand control effect.

[0034] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. An oil well sand control bridge body adapted for an intelligent production distributor, comprising, from top to bottom, an upper joint, a bridge seat, and a lower joint, characterized in that: The bridge seat is provided with a first cavity, a second cavity, an eccentric hole and a side hole. A ball seat tube is fixedly and sealedly connected to the inner wall of the first cavity, a first central channel is provided in the ball seat tube, a gap is provided between the ball seat tube and the upper joint, forming a first annular channel, and the inner wall of the second cavity is fixedly and sealedly connected to the lower joint; a connecting piece is also fixedly and sealedly connected under the bridge seat, a gap is provided between the connecting piece and the lower joint, forming a second annular channel; the second annular channel is connected to the outside of the device, and a sand-proof filtering mechanism is provided at the inlet; the first central channel, the first cavity, the side hole and the second annular channel are connected in sequence to form a first fluid channel for the flow of upper fluid; the first annular channel, the eccentric hole, the second cavity and the second central channel are connected in sequence to form a second fluid channel for the flow of lower fluid.

2. The oil well sand control bridge body adapted for the intelligent production distributor according to claim 1 is characterized by: The sand prevention and filtering mechanism is arranged at the inlet of the second annular channel through a protective seat, and the protective seat is fixedly and sealedly connected to the connecting piece.

3. The oil well sand control bridge body adapted for the intelligent production distributor according to claim 2, characterized in that: The sand-proof filtering mechanism comprises a filtering layer and a protective structure, and the protective structure is arranged outside the filtering layer.

4. The oil well sand control bridge body adapted for the intelligent production distributor according to claim 3 is characterized by: The protective structure is a protective steel net with multiple small holes.

5. The oil well sand control bridge body adapted for an intelligent production distributor according to claim 1, characterized in that: There are a plurality of eccentric holes and side holes, which are evenly distributed on the bridge seat.

6. The oil well sand control bridge body adapted for an intelligent production distributor according to claim 1, characterized in that: A movable sealing ball is provided in the ball seat tube, and the diameter of the sealing ball is larger than the diameter of the first cavity.

7. The oil well sand control bridge body adapted for an intelligent production distributor according to claim 1 or 2, characterized in that: The fixed sealing connection between the upper joint, the bridge seat, the lower joint, the ball seat tube, the connecting piece and the protective seat is a threaded connection.

8. The oil well sand control bridge body adapted for the intelligent production distributor according to claim 7, characterized in that: At least one sealing ring is provided at the threaded connection.

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