A nitrogen injection device for oil and gas fields

Abstract

The utility model discloses an oil and gas field nitrogen injection device, including air compressor, the both sides of air compressor outer surface all is provided with the heat dissipation groove, and the inboard of heat dissipation groove is swinged and is installed with dustproof mechanism through swing dismounting mechanism, and the inboard of one heat dissipation groove is installed with fan body, the middle of air compressor rear end surface is installed with filter box, and the upper end surface of filter box is provided with vertical groove, and the inboard of vertical groove is swinged and is provided with filter mechanism, just filter box and air inlet pipe are connected through the connecting pipe, and one side of air compressor rear end surface is installed with air inlet pipe, and the other side of air compressor rear end surface is installed with air outlet pipe, and the other end of air outlet pipe is connected with oil field pipeline, and the front of oil field pipeline outer surface is equipped with the fixed ring. The utility model discloses convenient to the dismounting of filter mechanism to guarantee the heat dissipation effect in the use process of air compressor, and can recycle and reuse to part nitrogen, avoids the waste of nitrogen.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen injection technology for oil and gas fields, specifically a nitrogen injection device for oil and gas fields. Background Technology

[0002] Nitrogen injection in oilfields is a method to improve oil production efficiency by injecting nitrogen gas into oil wells. The injected nitrogen can form nitrogen foam in the oil reservoir, which can improve oil displacement efficiency, adjust fluid intake profiles, block crossflow, and act as a water cone. An air compressor is required in the oilfield nitrogen injection system to provide compressed air as a feedstock for membrane separation nitrogen production. Air compressors typically require heat dissipation during operation. Therefore, multiple air inlets are opened on one side of the air compressor, and fans are installed on the other side or top. Heat dissipation is achieved by activating the fans, which draw outside air into the compressor through the inlets and circulate within the compressor, carrying away internal heat and thus cooling the air compressor.

[0003] However, while traditional air compressors dissipate heat, dust in the air also enters the compressor's interior through the air inlet. Once inside, the dust easily adheres to the surface of the internal components, reducing the heat dissipation rate and negatively impacting the compressor's operation, making it inconvenient to use. Furthermore, after high-temperature nitrogen is injected into the oilfield pipeline, some of the nitrogen is discharged into the atmosphere along the pipeline opening, making effective recovery and reuse impossible. Therefore, these methods do not meet current requirements. To address this, we propose an oil and gas field nitrogen injection device. Utility Model Content

[0004] The purpose of this invention is to provide a nitrogen injection device for oil and gas fields, which solves the problems mentioned in the background art, such as the fact that in traditional air compressors, while dissipating heat, dust in the air can also enter the air compressor through the air inlet. After entering the air compressor, the dust can easily adhere to the surface of the internal components, thereby reducing the heat dissipation rate of the internal components and also having an adverse effect on the operation of the air compressor, making it inconvenient to use. In addition, after high-temperature nitrogen is injected into the oil field pipeline, some of the high-temperature nitrogen will be discharged into the atmosphere along the pipeline opening, and the discharged high-temperature nitrogen cannot be effectively recovered and utilized.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an oil and gas field nitrogen injection device, comprising an air compressor, wherein heat dissipation grooves are provided on both sides of the outer surface of the air compressor, and a dustproof mechanism is movably installed on the inner side of the heat dissipation grooves through a movable disassembly mechanism; a fan body is installed on the inner side of one of the heat dissipation grooves; a filter box is installed in the middle of the rear end face of the air compressor, a vertical groove is provided on the upper end face of the filter box, and a filter mechanism is movably installed on the inner side of the vertical groove; the filter box is connected to the air inlet pipe through a connecting pipe; an air inlet pipe is installed on one side of the rear end face of the air compressor, and an air outlet pipe is installed on the other side of the rear end face of the air compressor; the other end of the air outlet pipe is connected to an oilfield pipeline; a fixing ring is fitted on the front of the outer surface of the oilfield pipeline, and multiple air inlets are evenly installed on the front end face of the fixing ring; a sealing mechanism is installed on the inner side of the air inlets.

[0006] Preferably, the dustproof mechanism includes a frame, the inner wall of which is fitted with a dustproof plate, and the movable disassembly mechanism includes a sliding plate, which is installed in front of and behind the heat dissipation groove via a sliding groove. The sliding plate and the inner wall of the sliding groove are connected by a first spring, and a retaining plate is installed on one side of the opposite outer surface of the two sliding plates.

[0007] Preferably, the slide and the heat dissipation groove are connected by a through groove, the retaining plate passes through the through groove, the front and rear faces of the frame are provided with retaining grooves, the retaining plate can be inserted into the inside of the retaining groove, and the four corners of the inner wall of the heat dissipation groove are all equipped with fixing plates, and a second spring is installed on the side of the fixing plate near the dustproof mechanism.

[0008] Preferably, the sealing mechanism includes a limiting ring, which is fixedly connected to the inner wall of the air inlet. Four horizontal plates are provided behind the limiting ring, and a third spring is fixedly installed on the front end face of the horizontal plates.

[0009] Preferably, a movable plate is fixedly connected to the front end face of the third spring, and a sealing plate is installed on the front end face of the movable plate, and the sealing plate can be inserted into the inner side of the limiting ring.

[0010] Preferably, the air inlet is connected to the circulation pipe via a first pipe, the other end of the circulation pipe extends to the inside of the vertical groove, one end of the connecting pipe extends to the inside of the air inlet pipe, the other end of the connecting pipe extends to the inside of the vertical groove, and a one-way valve is installed on the inside of the connecting pipe.

[0011] Preferably, the filtration mechanism includes a U-shaped frame, on the inner side of which filter cotton and activated carbon adsorption mesh are installed in sequence, and a handle is installed on the upper surface of the U-shaped frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model is equipped with a movable disassembly mechanism, which allows two sliding plates to slide simultaneously away from the dustproof mechanism. The movement of the sliding plates causes the card plate to move, and the card plate leaves the inner side of the card slot, releasing the restriction on the frame and the dustproof plate. Under the action of multiple second springs, the frame is pushed outward of the heat dissipation groove, making it convenient for the user to remove the dustproof mechanism from the inner side of the heat dissipation groove and clean the dustproof plate. This utility model facilitates the disassembly and assembly of the filter mechanism, thereby ensuring the heat dissipation effect of the air compressor during use.

[0014] 2. This utility model, by setting up an air inlet, a sealing mechanism, a circulation pipe, a filter box, a connecting pipe, and a filtration mechanism, allows some high-temperature nitrogen to enter the air inlet as the nitrogen in the oilfield pipeline increases. The nitrogen pushes the sealing plate backward, compressing the third spring and causing the sealing plate to move away from the inner side of the limiting ring. At this time, the nitrogen can enter the rear of the air inlet through the gap between the sealing plate and the limiting ring, and then enter the interior of the filter box through the circulation pipe. It can be filtered and adsorbed by the filter cotton and activated carbon adsorption mesh, and then enter the inner side of the air inlet pipe through the connecting pipe, and then enter the air compressor again for compression. This utility model can recover and reuse part of the nitrogen, avoiding the waste of nitrogen. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a top sectional view of the entire utility model;

[0017] Figure 3 This is a partial structural schematic diagram of the movable disassembly mechanism of this utility model;

[0018] Figure 4 This is a top view of the oilfield pipeline of this utility model;

[0019] Figure 5 This is a partial structural diagram of the air inlet of this utility model;

[0020] Figure 6 This is a partial structural diagram of the filter box of this utility model.

[0021] In the diagram: 1. Air compressor; 2. Movable disassembly mechanism; 201. First spring; 202. Slide groove; 203. Slide plate; 204. Second spring; 205. Fixing plate; 206. Slot; 207. Clamping plate; 3. Dustproof mechanism; 301. Frame; 302. Dustproof plate; 4. Circulation pipe; 5. Air outlet pipe; 6. Oilfield pipe; 7. Fixing ring; 8. Heat dissipation groove; 9. Fan body; 10. Filter box; 11. Connecting pipe; 12. Air inlet pipe; 13. Air inlet; 14. Sealing mechanism; 1401. Horizontal plate; 1402. Limiting ring; 1403. Sealing plate; 1404. Movable plate; 1405. Third spring; 15. Vertical groove; 16. Filtering mechanism. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] The fan body 9 (model DPT20-55H) mentioned in this utility model can be obtained from the market or through private customization.

[0024] Please see Figures 1 to 6 This utility model provides an embodiment of a nitrogen injection device for oil and gas fields, comprising an air compressor 1. Heat dissipation grooves 8 are provided on both sides of the outer surface of the air compressor 1. A dustproof mechanism 3 is movably installed on the inner side of the heat dissipation grooves 8 via a movable disassembly mechanism 2. A fan body 9 is installed on the inner side of one of the heat dissipation grooves 8. A filter box 10 is installed in the middle of the rear end face of the air compressor 1. A vertical groove 15 is provided on the upper end face of the filter box 10. A filter mechanism 16 is movably installed on the inner side of the vertical groove 15. The filter box 10 is connected to an air inlet pipe 12 via a connecting pipe 11. An air inlet pipe 12 is installed on one side of the rear end face of the air compressor 1, and an air outlet pipe 5 is installed on the other side of the rear end face of the air compressor 1. The other end of the air outlet pipe 5 is connected to an oilfield pipeline 6. A fixing ring 7 is fitted on the front of the outer surface of the oilfield pipeline 6. Multiple air inlets 13 are evenly installed on the front end face of the fixing ring 7, and a sealing mechanism 14 is installed on the inner side of the air inlets 13.

[0025] The dustproof mechanism 3 includes a frame 301, and a dustproof plate 302 is installed on the inner wall of the frame 301. The movable disassembly mechanism 2 includes a slide plate 203, which is installed in front and behind the heat dissipation slot 8 through a slide groove 202. The slide plate 203 is connected to the inner wall of the slide groove 202 by a first spring 201. A locking plate 207 is installed on one side of the outer surface of the two slide plates 203, and the locking plate 207 can be moved by the slide plate 203.

[0026] The slide 202 is connected to the heat dissipation slot 8 through the through slot. The retaining plate 207 passes through the through slot. The front and rear faces of the frame 301 are provided with retaining slots 206. The retaining plate 207 can be inserted into the inner side of the retaining slot 206. The four corners of the inner wall of the heat dissipation slot 8 are all equipped with fixing plates 205. The side of the fixing plate 205 near the dustproof mechanism 3 is equipped with a second spring 204. The retaining plate 207 can limit the dustproof mechanism 3. When the retaining plate 207 leaves the inner side of the retaining slot 206, the dustproof mechanism 3 is pushed outward of the heat dissipation slot 8 under the action of the second spring 204.

[0027] The sealing mechanism 14 includes a limiting ring 1402, which is fixedly connected to the inner wall of the air inlet 13. Four horizontal plates 1401 are provided behind the limiting ring 1402. A third spring 1405 is fixedly installed on the front end face of the horizontal plate 1401. A movable plate 1404 is fixedly connected to the front end face of the third spring 1405. A sealing plate 1403 is installed on the front end face of the movable plate 1404. The sealing plate 1403 can be inserted into the inner side of the limiting ring 1402. As the amount of nitrogen in the oilfield pipeline 6 increases, some high-temperature nitrogen will enter the air inlet 13. The nitrogen will push the sealing plate 1403 backward, compressing the third spring 1405. The sealing plate 1403 will leave the inner side of the limiting ring 1402. At this time, the nitrogen can enter the rear of the air inlet 13 through the gap between the sealing plate 1403 and the limiting ring 1402.

[0028] The air inlet 13 is connected to the circulation pipe 4 through the first pipe. The other end of the circulation pipe 4 extends to the inside of the vertical groove 15. One end of the connecting pipe 11 extends to the inside of the air inlet pipe 12, and the other end of the connecting pipe 11 extends to the inside of the vertical groove 15. A one-way valve is installed on the inside of the connecting pipe 11. The nitrogen entering the air inlet 13 can enter the circulation pipe 4 and then enter the filter box 10. After being filtered by the filter mechanism 16, it enters the inside of the air inlet pipe 12 and is circulated back into the air compressor 1.

[0029] The filter mechanism 16 includes a U-shaped frame, on the inner side of which filter cotton and activated carbon adsorption mesh are installed in sequence, and a handle is installed on the upper end face of the U-shaped frame. Nitrogen entering the air inlet 13 can be filtered and adsorbed by the filter cotton and activated carbon adsorption mesh. The filter mechanism 16 can be pulled out from the inside of the vertical groove 15 by the handle.

[0030] When using this nitrogen injection device for oil and gas fields, the power is first turned on. A movable disassembly mechanism 2 allows two sliding plates 203 to slide simultaneously away from the dustproof mechanism 3. The movement of the sliding plates 203 moves the clamping plate 207, disengaging it from the inner side of the clamping slot 206 and releasing the restriction on the frame 301 and dustproof plate 302. Under the action of multiple second springs 204, the frame 301 is pushed outwards from the heat dissipation groove 8, facilitating the user to remove the dustproof mechanism 3 from the inner side of the heat dissipation groove 8 and clean the dustproof plate 302. The device is equipped with an air inlet 13, a sealing mechanism 14, a circulation pipe 4, a filter box 10, a connecting pipe 11, and a filter mechanism 16. As nitrogen increases in the oilfield pipeline 6... Some high-temperature nitrogen gas will enter the air inlet 13, pushing the sealing plate 1403 backward. The third spring 1405 is compressed, and the sealing plate 1403 moves away from the inner side of the limiting ring 1402. At this time, the nitrogen gas can enter the rear of the air inlet 13 through the gap between the sealing plate 1403 and the limiting ring 1402, and then enter the interior of the filter box 10 through the circulation pipe 4. It can be filtered and adsorbed by the filter cotton and activated carbon adsorption net, and then enter the inner side of the air inlet pipe 12 through the connecting pipe 11, and then enter the air compressor 1 again for compression. This utility model facilitates the disassembly and assembly of the filter mechanism 16, thereby ensuring the heat dissipation effect of the air compressor 1 during use, and can recover and reuse some nitrogen gas, avoiding the waste of nitrogen gas.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A nitrogen injection device for oil and gas fields, comprising an air compressor (1), characterized in that: The air compressor (1) has heat dissipation grooves (8) on both sides of its outer surface. A dustproof mechanism (3) is movably installed on the inner side of the heat dissipation groove (8) via a movable disassembly mechanism (2). A fan body (9) is installed on the inner side of one of the heat dissipation grooves (8). A filter box (10) is installed in the middle of the rear end face of the air compressor (1). A vertical groove (15) is provided on the upper end face of the filter box (10). A filter mechanism (16) is movably installed on the inner side of the vertical groove (15). The filter box (10) has a vertical groove (15) on its upper end face. 0) Connected to the intake pipe (12) via the connecting pipe (11), the intake pipe (12) is installed on one side of the rear end face of the air compressor (1), and the exhaust pipe (5) is installed on the other side of the rear end face of the air compressor (1). The other end of the exhaust pipe (5) is connected to the oilfield pipeline (6). A fixing ring (7) is fitted on the front of the outer surface of the oilfield pipeline (6). Multiple air inlets (13) are evenly installed on the front end face of the fixing ring (7). A sealing mechanism (14) is installed on the inner side of the air inlet (13).

2. The nitrogen injection device for oil and gas fields according to claim 1, characterized in that: The dustproof mechanism (3) includes a frame (301), and a dustproof plate (302) is installed on the inner wall of the frame (301). The movable disassembly mechanism (2) includes a sliding plate (203), which is installed in front of and behind the heat dissipation slot (8) through a slide groove (202). The sliding plate (203) is connected to the inner wall of the slide groove (202) by a first spring (201). A clamping plate (207) is installed on the opposite side of the outer surface of the two sliding plates (203).

3. The nitrogen injection device for oil and gas fields according to claim 2, characterized in that: The slide (202) and the heat dissipation groove (8) are connected by a through groove. The card plate (207) passes through the through groove. The front and rear faces of the frame (301) are provided with card slots (206). The card plate (207) can be inserted into the inside of the card slot (206). The four corners of the inner wall of the heat dissipation groove (8) are all equipped with fixing plates (205). A second spring (204) is installed on the side of the fixing plate (205) near the dustproof mechanism (3).

4. The nitrogen injection device for oil and gas fields according to claim 1, characterized in that: The sealing mechanism (14) includes a limiting ring (1402), which is fixedly connected to the inner wall of the air inlet (13). Four horizontal plates (1401) are provided behind the limiting ring (1402), and a third spring (1405) is fixedly installed on the front end face of the horizontal plate (1401).

5. The nitrogen injection device for oil and gas fields according to claim 4, characterized in that: The front end face of the third spring (1405) is fixedly connected to a movable plate (1404), and a sealing plate (1403) is installed on the front end face of the movable plate (1404), and the sealing plate (1403) can be inserted into the inner side of the limiting ring (1402).

6. The nitrogen injection device for oil and gas fields according to claim 1, characterized in that: The air inlet (13) is connected to the circulation pipe (4) through a first pipe. The other end of the circulation pipe (4) extends to the inside of the vertical groove (15). One end of the connecting pipe (11) extends to the inside of the air inlet pipe (12), and the other end of the connecting pipe (11) extends to the inside of the vertical groove (15). A one-way valve is installed on the inside of the connecting pipe (11).

7. The nitrogen injection device for oil and gas fields according to claim 1, characterized in that: The filtration mechanism (16) includes a U-shaped frame, on the inner side of which filter cotton and activated carbon adsorption mesh are installed in sequence, and a handle is installed on the upper surface of the U-shaped frame.

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