Anti-blocking wellhead water injection structure for oilfield development

Abstract

The utility model belongs to oilfield exploitation technical field especially is a kind of wellhead water injection structure for anti-blocking oilfield exploitation, including setting frame, filter basket and end cap, filter basket is overlapped on the annular lip plate of the lower part integrated setting of setting frame by the overlap ring plate of upper port, setting frame is embedded at the wellhead part of oil well, and filler is arranged in the gap between setting frame and oil well sidewall, end cap is inserted in setting frame by inserting ring plate, and water injection valve and exhaust valve are arranged on end cap.The utility model, the whole water injection structure is divided into three parts of setting frame, filter basket and end cap, uses setting frame as the bearing component of whole water injection structure, stably installs water injection structure at wellhead position and uses, setting frame can also support wellhead part, avoid the collapse of wellhead part in the water injection process, ensure stable use, and filter basket is directly overlapped on setting frame, convenient for quick disassembly and assembly, clean impurities, simple operation is convenient, and it is convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of oilfield development technology, specifically to an anti-clogging wellhead water injection structure for oilfield development. Background Technology

[0002] An oil field refers to the total number of oil and gas reservoirs within the same oil and gas producing area under the control of a single geological structure or stratigraphic factor. During the development of an oil field, water needs to be injected into the wellhead to improve the development speed and recovery rate of the oil reservoir. When injecting water into the well, it is necessary to use a corresponding wellhead water injection mechanism.

[0003] The patent application with application number 202222528619.2 and title "An anti-clogging type wellhead water injection structure for oilfield development" states: "It includes an oilfield wellhead (1) and a water injection valve (3) installed on the upper end of the water injection cylinder (2); characterized in that it also includes: a limiting mechanism (5), which is symmetrically arranged at the left and right ends of the water injection cylinder (2), and the limiting mechanism (5) is used to limit the distance between the water injection cylinder (2) and the oilfield wellhead (1), and the water injection cylinder (2) is inserted into the interior of the oilfield wellhead (1); a filter screen (11), which is arranged inside the oilfield wellhead (1), and the filter screen (11) is used to filter the injected water, and the filter screen (11) forms a disassembly structure at the lower end of the water injection cylinder (2) through an auxiliary block (14) and a fixed connecting rod (15).

[0004] In the above-mentioned technical solution, the entire water injection structure is installed at the wellhead, which makes it inconvenient to disassemble and reassemble as a whole. It is also inconvenient to remove the filter screen to clean impurities, making it inconvenient to use. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an anti-clogging wellhead water injection structure for oilfield development. This solves the problems of the entire water injection structure being installed at the wellhead, making it inconvenient to disassemble and reassemble, and also making it difficult to remove the filter screen for cleaning impurities, thus hindering its use.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A wellhead water injection structure for anti-clogging oilfield development includes a mounting frame, a filter basket, and an end cap. The filter basket is connected to an annular lip plate integrally formed at the lower part of the mounting frame via an overlapping ring plate at the upper end. The mounting frame is embedded at the wellhead of the oil well, and a filler is placed in the gap between the mounting frame and the sidewall of the oil well. The end cap is inserted into the mounting frame via an insertion ring plate, and a water injection valve and an air vent valve are installed on the end cap.

[0010] Furthermore, the upper port of the mounting frame is integrally formed with an annular end plate, which is placed on the ground at the oilfield wellhead, and the annular end plate is provided with injection holes distributed in an annular array.

[0011] A ring array of limiting buckles is fixedly connected to the annular end plate. The limiting buckles are placed in buckle grooves opened at corresponding positions on the end cover. A sealing gasket is placed between the annular end plate and the end cover.

[0012] Furthermore, a sealing gasket is provided between the overlapping ring plate at the upper port of the filter basket and the annular lip plate at the lower port of the mounting frame, and the upper ends of both the filter basket and the reinforcing outer frame are fixedly connected to the overlapping ring plate.

[0013] The middle part of the bottom of the filter basket protrudes upward and forms an annular collection groove at the bottom of the filter basket. A hanging ring is fixedly installed at the protruding part of the bottom of the filter basket and is fixedly connected to the reinforcing outer frame.

[0014] Furthermore, a handle is fixedly connected to the upper surface of the end cap, and the insertion ring plate at the lower part of the end cap slides against the inner wall of the mounting frame.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides an anti-clogging wellhead water injection structure for oilfield development, which has the following beneficial effects:

[0017] This utility model comprises three parts: a mounting frame, a filter basket, and an end cap. The mounting frame serves as the load-bearing component of the entire water injection structure, allowing it to be stably installed at the wellhead. The mounting frame also supports the wellhead, preventing it from collapsing during water injection and ensuring stable operation. Meanwhile, the filter basket rests directly on the mounting frame, facilitating quick assembly and disassembly for cleaning impurities. The operation is simple, convenient, and easy to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the mounting frame in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the filter basket in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the end cap of this utility model.

[0022] In the diagram: 1. Placement frame; 101. Filler; 102. Annular lip plate; 103. Annular end plate; 104. Limit buckle; 105. Injection hole; 2. Filter basket; 201. Reinforcing outer frame; 202. Overlapping ring plate; 203. Lifting ring; 3. End cap; 301. Water injection valve; 302. Air vent valve; 303. Handle; 304. Insertion ring plate; 305. Clip groove. Detailed Implementation

[0023] 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.

[0024] Example

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in one embodiment of this utility model, an anti-clogging wellhead water injection structure for oilfield development includes a mounting frame 1, a filter basket 2, and an end cap 3. The filter basket 2 overlaps with the annular lip plate 102 integrally formed at the lower part of the mounting frame 1 via an overlapping ring plate 202 at its upper end. The mounting frame 1 is embedded in the wellhead of the oil well. The mounting frame 1 stably installs the filter basket 2 at the wellhead position for stable use, filtering and removing impurities from the water injected into the oil well, preventing impurities from entering the oil well and causing pollution. Furthermore, a filler 101 is placed in the gap between the mounting frame 1 and the sidewall of the oil well to improve the stability of the mounting frame 1 at the wellhead position and ensure stable use. The end cap 3... The insertion ring plate 304 is inserted into the mounting frame 1 to ensure that the end cap 3 is stably installed on the mounting frame 1, so that the two can be used together stably. At the same time, it also seals the upper port of the water injection cavity formed by the mounting frame 1 and the filter basket 2 to prevent external debris from falling into the filter basket 2 during the water injection process, ensuring smooth water injection. The end cap 3 is equipped with a water injection valve 301 and an air vent valve 302. The water injection valve 301 is connected to the external water supply pipe, so that water can be smoothly injected into the filter basket 2 to complete the water injection operation. At the same time, the air vent valve 302 discharges the compressed air in the oil well during the water injection process to ensure the internal air pressure balance of the oil well, so as to facilitate smooth water injection.

[0026] like Figure 1 and Figure 2 As shown, in some embodiments, the upper end of the mounting frame 1 is integrally formed with an annular end plate 103. The annular end plate 103 is placed on the ground at the wellhead of the oil field, which facilitates the stable installation of the mounting frame 1 at the wellhead of the oil well. The mounting frame 1 serves as the load-bearing component of the entire water injection structure, and the water injection structure is stably installed at the wellhead. At the same time, the mounting frame 1 supports the wellhead, preventing the wellhead from collapsing during water injection and ensuring stable use. The annular end plate 103 is provided with an annular array of injection holes 105, which facilitates the smooth injection of foam material 101, which serves as filler, into the gap between the mounting frame 1 and the wellhead sidewall after the mounting frame 1 is installed at the wellhead, filling the gap and improving the stability of the mounting frame 1 installed at the wellhead.

[0027] A ring-shaped array of limit buckles 104 are fixedly connected to the annular end plate 103. The limit buckles 104 are placed in the buckle grooves 305 opened at the corresponding positions on the end cover 3. The end cover 3 is stably installed on the mounting frame 1 by the cooperation between the two, so that the two can be used together stably. A sealing gasket is placed between the annular end plate 103 and the end cover 3 to seal the gap at the contact part of the two and ensure stable use.

[0028] like Figure 1 Diagram and Figure 3 As shown, in some embodiments, a sealing gasket is placed between the overlapping ring plate 202 at the upper end of the filter basket 2 and the annular lip plate 102 at the lower end of the mounting frame 1 to seal the gap between the two, preventing impurities from seeping into the oil well with the water during the water injection process. The upper ends of the filter basket 2 and the reinforcing outer frame 201 are both fixedly connected to the overlapping ring plate 202. The reinforcing outer frame 201 is used to improve the strength of the entire filter basket 2, ensuring that it can be used stably for a long time under the impact of water flow during the water injection process.

[0029] The bottom of the filter basket 2 has a raised center section that forms an annular collection groove. This groove helps to trap impurities in the water during the water injection process, preventing them from contaminating the oil well. It also facilitates quick and effective cleaning of the trapped impurities. A lifting ring 203 is fixedly installed on the raised section at the bottom of the filter basket 2. The lifting ring 203 is fixedly connected to the reinforcing outer frame 201, allowing for stable installation of the lifting ring 203 on the filter basket 2. During the assembly and disassembly of the filter basket 2, it can be used in conjunction with the hoisting equipment to quickly move the filter basket 2 into the mounting frame 1 or remove it, improving the convenience of the assembly and disassembly operation.

[0030] like Figure 1, Figure 2 and Figure 4 As shown, in some embodiments, a handle 303 is fixedly connected to the upper surface of the end cap 3, which facilitates the direct gripping of the handle 303 during disassembly and assembly, thereby enabling rapid movement of the entire end cap 3 and achieving quick and efficient disassembly and assembly between the end cap 3 and the mounting frame 1, improving the convenience of operation. In addition, the insertion ring plate 304 at the lower part of the end cap 3 slides against the inner wall of the mounting frame 1, ensuring that the end cap 3 can be smoothly installed on the mounting frame 1, so that the two can be smoothly matched together for stable use.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wellhead water injection structure for anti-clogging oilfield development, comprising a mounting frame (1), a filter basket (2), and an end cap (3), characterized in that: The filter basket (2) is connected to the annular lip plate (102) integrally set at the lower part of the mounting frame (1) through the overlapping ring plate (202) at the upper end. The mounting frame (1) is embedded in the wellhead of the oil well, and a filler (101) is placed in the gap between the mounting frame (1) and the side wall of the oil well. The end cap (3) is inserted into the mounting frame (1) through the insertion ring plate (304), and a water injection valve (301) and an air vent valve (302) are installed on the end cap (3).

2. The anti-clogging wellhead water injection structure for oilfield development according to claim 1, characterized in that: The upper port of the mounting frame (1) is integrally formed with an annular end plate (103). The annular end plate (103) is placed on the ground at the wellhead of the oil field, and the annular end plate (103) is provided with an annular array of injection holes (105).

3. The anti-clogging wellhead water injection structure for oilfield development according to claim 2, characterized in that: The annular end plate (103) is fixedly connected with a ring array of limiting buckles (104), which are placed in buckle grooves (305) opened at corresponding positions on the end cover (3). A sealing gasket is placed between the annular end plate (103) and the end cover (3).

4. The anti-clogging wellhead water injection structure for oilfield development according to claim 1, characterized in that: A sealing gasket is provided between the overlapping ring plate (202) at the upper port of the filter basket (2) and the annular lip plate (102) at the lower port of the mounting frame (1), and the upper ends of the filter basket (2) and the reinforcing outer frame (201) are both fixedly connected to the overlapping ring plate (202).

5. The anti-clogging wellhead water injection structure for oilfield development according to claim 4, characterized in that: The middle part of the bottom of the filter basket (2) protrudes upward and forms an annular collection groove at the bottom of the filter basket (2). A hanging ring (203) is fixedly installed at the protruding part at the bottom of the filter basket (2), and the hanging ring (203) is fixedly connected to the reinforcing outer frame (201).

6. The anti-clogging wellhead water injection structure for oilfield development according to claim 1, characterized in that: A handle (303) is fixedly connected to the upper surface of the end cap (3), and the insertion ring plate (304) at the lower part of the end cap (3) slides against the inner wall of the mounting frame (1).

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