Water injection device for oil reservoir exploitation

Abstract

The water injection device comprises a filter shell, one end of the filter shell is fixedly connected with a water inlet, a filter element is inserted into the filter shell, one end of the filter element is fixedly connected with a connector, the connector is matched with the water inlet, filter holes are formed in the outer wall of the filter element, a residue storage groove is formed in the lower portion of the filter element, and the residue storage groove is communicated with the filter element. One end of the filter shell is connected with a sealing seat, a transmission rod is rotationally mounted in the sealing seat, a cleaning scraping brush is fixedly connected to the transmission rod through a shaft and attached to the inner wall of the filter element, a drainage pipe is fixedly connected to the lower portion of the filter shell, the other end of the drainage pipe is fixedly connected with a booster pump, and the output end of the booster pump is fixedly connected with a water injection pipe. The cleaning scraping brush can rotate by starting the power motor, impurities adhered to the interior of the filter element can be scraped and collected in the slag storage tank by rotating the cleaning scraping brush, then the filter holes are prevented from being blocked by the impurities, the single-time use time of the filter element is prolonged, and the maintenance frequency is reduced.

Description

Technical Field

[0001] The utility model relates to a water injection device, in particular to a water injection device for oil reservoir exploitation. Background Art

[0002] Water injection production refers to the process of injecting water into the oil reservoir through special water injection wells during oil field development to maintain or restore the oil layer pressure, giving the oil reservoir a strong driving force to increase the oil reservoir's production speed and recovery rate.

[0003] For example, a water injection device for an oil reservoir with the publication number CN220487556U disclosed in a Chinese patent includes an oil pipe, a filter tube is provided in the middle of the oil pipe, an inner filter screen is provided inside the supporting keel, the supporting keel is movably connected to the inner filter screen, a secondary pipe is provided on the other side of the top end of the oil pipe, one end of the secondary pipe is provided with a secondary filter box, the other end of the secondary filter box is provided with a secondary pipe, the other end of the secondary pipe is provided with a transfer pipe, a channel tube is provided in the middle of the top end of the secondary filter box, a buffer box is provided at the top end of the channel tube, a filter cage is provided inside the secondary filter box, and a filter sponge is provided inside the filter cage. When the equipment is in use, the oil field produced water is filtered at multiple levels, and the large and small stains in the oil field produced water are filtered, and the oil layer pipeline will not be blocked, so that the subsequent work is smoother and the effect is more excellent;

[0004] Some problems were found during the use of the above-mentioned existing oil reservoir water injection device. First, the produced water was filtered, and the filtered impurities would accumulate inside the filter mechanism, resulting in the need to frequently replace and clean the filter element and other components inside the filter mechanism. Secondly, the booster pump was set at the front end, resulting in the impurities inside the produced water accelerating the wear of the internal components of the booster pump. Utility Model Content

[0005] The purpose of the utility model is to provide a water injection device for oil reservoir exploitation, so as to solve the existing problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a water injection device for oil reservoir exploitation, comprising a filter housing, one end of the filter housing being fixedly connected to a water inlet, a filter element being inserted into the filter housing, one end of the filter element being fixedly connected to a connector, the connector and the water inlet being coordinated with each other, a filter hole being provided on the outer wall of the filter element, a slag storage tank being provided under the filter element, one end of the filter housing being connected to a sealing seat, a transmission rod being rotatably installed in the sealing seat, a cleaning brush being fixedly connected to the transmission rod through an axis, the cleaning brush being in contact with the inner wall of the filter element, a drain pipe being fixedly connected to the bottom of the filter housing, a booster pump being fixedly connected to the other end of the drain pipe, and an injection pipe being fixedly connected to the output end of the booster pump.

[0007] Preferably, a fixing flange is fixedly connected to the other end of the filter housing, a through hole is opened in the sealing seat near the edge, a bolt is arranged in the through hole, and the bolt cooperates with the fixing flange.

[0008] Preferably, a plurality of support rings are fixedly connected to the outer wall of the filter element, the support rings are in contact with the inner wall of the filter housing, and the outer wall of the support rings is provided with a communicating groove.

[0009] Preferably, a power motor is fixedly connected to the other side of the sealing seat, and the output end of the power motor is fixedly connected to the transmission rod.

[0010] Preferably, a support frame is rotatably mounted on the transmission rod near the end edge, a scraper block is fixedly connected to the bottom of the support frame, and the scraper block cooperates with the slag storage tank.

[0011] Preferably, a pressure gauge is fixedly connected to the water injection pipe.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. By placing the booster pump at the end, the produced water is filtered before being pressurized and pumped into the reservoir by the booster pump, preventing impurities contained in the produced water from wearing or damaging the internal components of the booster pump.

[0014] 2. By starting the power motor, the cleaning scraper brush can rotate. The rotation of the cleaning scraper brush can scrape off the impurities adhering to the inside of the filter element and collect them in the slag storage tank, thereby preventing impurities from clogging the filter holes, extending the single use time of the filter element, and reducing the number of maintenance times. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a half-section view of the filter housing of the present utility model;

[0017] Figure 3 This is a schematic diagram of the filter element structure of the present utility model;

[0018] Figure 4 This is a schematic diagram of the sealing seat structure of the present utility model.

[0019] In the figure: 1. Filter housing; 101. Water inlet; 102. Drain pipe; 103. Fixed flange; 2. Filter element; 201. Connector; 202. Slag storage tank; 203. Filter hole; 204. Support ring; 205. Connecting groove; 3. Sealing seat; 301. Through hole; 302. Power motor; 303. Transmission rod; 304. Cleaning brush; 305. Support frame; 306. Scraper; 4. Booster pump; 401. Water injection pipe; 402. Pressure gauge. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4 The utility model provides a technical solution: a water injection device for oil reservoir exploitation, comprising a filter housing 1, one end of the filter housing 1 is fixedly connected to a water inlet 101, a filter element 2 is inserted in the filter housing 1, one end of the filter element 2 is fixedly connected to a connector 201, the connector 201 cooperates with the water inlet 101, a filter hole 203 is provided on the outer wall of the filter element 2, a slag storage tank 202 is provided under the filter element 2, one end of the filter housing 1 is connected to a sealing seat 3, a transmission rod 303 is rotatably installed in the sealing seat 3, a cleaning brush 304 is fixedly connected to the transmission rod 303 through an axis, the cleaning brush 304 is in contact with the inner wall of the filter element 2, a drain pipe 102 is fixedly connected to the bottom of the filter housing 1, the other end of the drain pipe 102 is fixedly connected to a booster pump 4, and the output end of the booster pump 4 is fixedly connected to a water injection pipe 401.

[0022] In this embodiment, the filter element 2 is inserted into the filter housing 1, and the connector 201 is kept vertically downward, and then the sealing seat 3 is fixed to the end of the filter housing 1. The sealing seat 3 will squeeze the filter element 2 and fix it inside the filter housing 1. The end of the connector 201 is provided with a rubber ring and other sealing parts, and then the connector 201 will be against the inner wall of the filter housing 1, so that the water inlet 101 flows directly into the filter element 2 and does not flow into the interior of the filter housing 1 cavity. The water will enter the cavity of the filter housing 1 after being filtered through the filter hole 203, and then Then it is transported to the booster pump 4 through the drain pipe 102, and is transported to the oil field after being pressurized by the booster pump 4. The filter hole 203 is opened on the outer wall of the upper side of the filter element 2. First, the filtered impurities accumulate on the inner wall of the filter element 2, and a part of them will naturally fall into the slag storage tank 202 by gravity. Secondly, the rotating transmission rod 303 drives the cleaning scraper 304 to rotate. The cleaning scraper 304 fits the inner wall of the filter element 2 and can scrape off the remaining impurities stuck to the inside of the filter element 2 and collect them in the slag storage tank 202, thereby avoiding the filter hole 203 being blocked and affecting

[0023] Among them, in order to achieve the purpose of supporting the filter element 2 at the center of the filter housing 1, the present device adopts the following technical solution: a fixing flange 103 is fixedly connected to the other end of the filter housing 1, and a through hole 301 is opened near the edge of the sealing seat 3. Bolts are arranged in the through hole 301, and the bolts cooperate with the fixing flange 103. Several support rings 204 are fixedly connected to the outer wall of the filter element 2, and the support rings 204 are in contact with the inner wall of the filter housing 1. A connecting groove 205 is opened on the outer wall of the support ring 204.

[0024] The sealing seat 3 is fixed to one end of the filter housing 1 by means of the cooperation between the bolts and the fixing flange 103. The support ring 204 is fitted with the inner wall of the filter housing 1, thereby supporting the filter element 2 at the center of the filter housing 1 and providing a certain supporting force for the outer wall of the filter element 2 to prevent the filter element 2 from deforming after being subjected to force. The connecting groove 205 connects the interior of the cavity divided by the support ring 204, thereby allowing the filtered produced water to flow into the drain pipe 102.

[0025] Among them, in order to achieve the purpose of driving the transmission rod 303 to rotate, this device adopts the following technical solutions: a power motor 302 is fixedly connected to the other side of the sealing seat 3, the output end of the power motor 302 is fixedly connected to the transmission rod 303, and a support frame 305 is rotatably installed on the transmission rod 303 near the end edge. A scraper block 306 is fixedly connected under the support frame 305, and the scraper block 306 cooperates with the slag storage tank 202. A pressure gauge 402 is fixedly connected to the water injection pipe 401.

[0026] By starting the power motor 302, the transmission rod 303 can be driven to rotate, and the rotation of the transmission rod 303 can drive the cleaning brush 304 to rotate. The support frame 305 and the scraper block 306 can form a support frame to provide support force for the end of the transmission rod 303. The scraper block 306 cooperates with the slag storage tank 202 to limit the support frame in the filter element 2 to avoid synchronous rotation of the support frame. At the same time, after removing the sealing seat 3, the support frame will be driven out of the filter element 2 under the drive of the transmission rod 303, and then the impurities accumulated in the slag storage tank 202 can be scraped out.

[0027] The working principle and usage process of the present invention are as follows: when in use, the water injection pipe 401 needs to be connected to the water injection port, the water inlet 101 needs to be connected to the water supply port, the produced water is pumped into the water inlet 101, and the connector 201 is used to directly transport it to the inside of the filter element 2. After the produced water is filtered by the filter hole 203, it will be transported to the booster pump 4 through the drain pipe 102. Starting the booster pump 4 can pressurize the filtered produced water, and then transport it to the water injection port through the water injection pipe 401 and pumped into the oil field. The pressure gauge 402 can display the injected water pressure, and then the injection pressure can be controlled by adjusting the booster pump 4. Starting the power motor 302 can drive the transmission rod 303 to rotate. The rotation of the transmission rod 303 drives the cleaning brush 304 to rotate, scraping off the impurities stuck to the inside of the filter element 2 and collecting them in the slag storage tank 202, thereby extending the single use time of the filter element 2 and reducing the number of maintenance times.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water injection device for oil reservoir exploitation, comprising a filter housing (1), characterized in that: One end of the filter housing (1) is fixedly connected to a water inlet (101), a filter element (2) is inserted into the filter housing (1), one end of the filter element (2) is fixedly connected to a connector (201), the connector (201) and the water inlet (101) cooperate with each other, a filter hole (203) is provided on the outer wall of the filter element (2), a slag storage tank (202) is provided below the filter element (2), one end of the filter housing (1) is connected to a sealing seat (3), a transmission rod (303) is rotatably installed in the sealing seat (3), a cleaning scraper (304) is fixedly connected to the transmission rod (303) through a shaft, the cleaning scraper (304) is in contact with the inner wall of the filter element (2), a drain pipe (102) is fixedly connected to the bottom of the filter housing (1), the other end of the drain pipe (102) is fixedly connected to a booster pump (4), and the output end of the booster pump (4) is fixedly connected to a water injection pipe (401).

2. The water injection device for oil reservoir exploitation according to claim 1, characterized in that: The other end of the filter housing (1) is fixedly connected to a fixing flange (103), and a through hole (301) is provided in the sealing seat (3) near the edge. Bolts are provided in the through hole (301), and the bolts cooperate with the fixing flange (103).

3. The water injection device for oil reservoir exploitation according to claim 1, characterized in that: A plurality of support rings (204) are fixedly connected to the outer wall of the filter element (2), the support rings (204) are in contact with the inner wall of the filter housing (1), and the outer wall of the support rings (204) is provided with a communication groove (205).

4. The water injection device for oil reservoir exploitation according to claim 1, characterized in that: A power motor (302) is fixedly connected to the other side of the sealing seat (3), and an output end of the power motor (302) is fixedly connected to a transmission rod (303).

5. The water injection device for oil reservoir exploitation according to claim 1, characterized in that: A support frame (305) is rotatably mounted on the transmission rod (303) near the end edge, and a scraper block (306) is fixedly connected below the support frame (305). The scraper block (306) cooperates with the slag storage tank (202).

6. The water injection device for oil reservoir exploitation according to claim 1, characterized in that: A pressure gauge (402) is fixedly connected to the water injection pipe (401).

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