Straight filter cartridge type watering filter

Abstract

The utility model relates to the technical field of oilfield development, in particular to a straight filter cartridge type watering filter, and aims to solve the problem that an existing water nozzle is easy to block. The sewage treatment device comprises a filter unit and a sewage collection unit, the filtering unit comprises a filtering pipe section and a filtering cylinder, and the dirt collecting unit comprises a dirt collecting pipe section; the filter pipe section is connected with the sewage collection pipe section, the filter cartridge is inserted into the filter pipe section, and the filter cartridge is arranged above the sewage collection pipe section and is communicated with the sewage collection pipe section; a mixed water inlet and a mixed water outlet are formed in the filter pipe section, and mixed water enters the filter cartridge through the mixed water inlet and then enters the mixed water outlet after being filtered by the side wall of the filter cartridge. The filtering unit and the dirt collecting unit are arranged to filter water and collect impurities before the water enters the water nozzle, so that the water nozzle is prevented from being blocked by the impurities, and blockage caused by accumulation of the impurities is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field development, in particular to a straight filter cartridge type water-mixing filter. Background Art

[0002] Water-injection production is a viscosity-reducing process technology used in oil production operations. Water-injection carries a certain amount of heat and water flow rate to improve the fluidity of crude oil in the pipeline, thereby reducing oil flow resistance and ensuring smooth transportation of crude oil under stable ground pipeline back pressure conditions. At the same time, water-injection can reduce viscosity and reduce the production load of the pumping unit, thereby avoiding the occurrence of pumping unit lying in the well.

[0003] At present, due to the high content of mechanical impurities in the water injection at the gathering and transportation station and the scaling and shedding of the pipeline, the water injection nozzle is blocked, resulting in the inability to achieve normal water injection and viscosity reduction production. First, the alternating load of the pumping well increases, the downward resistance of the sucker rod increases, causing the bare rod to go down and stop the well or the rod to lie in the well; second, the alternating load increases, resulting in the stress tensile fracture of the sucker rod, resulting in the lying well; third, the ground water nozzle is blocked, resulting in the increase of the back pressure of the ground pipeline, until the oil pipeline is blocked, and normal oil transportation cannot be implemented. It is necessary to take high-pressure dredging of the ground pipeline or replace a new pipeline; fourth, the water nozzle needs to be cleaned frequently after the water nozzle is blocked, which increases the workload of employees; fifth, after the well is lying, it needs to be repaired and resumed. The above situation ultimately leads to a decrease in the production time of the oil well, resulting in serious production losses and increased costs. However, the solution of updating the water injection filtration equipment at the gathering and transportation station has the problem of large investment and the inability to deal with the scaling and mechanical impurities in the ground pipeline at the rear end of the gathering and transportation station. There is still a high probability of clogging of the water injection nozzle, which cannot achieve the purpose of solving the problem. Utility Model Content

[0004] The utility model aims to provide a straight filter cartridge water-mixing filter to solve the problem that the existing water nozzle is easily blocked.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] A straight filter cartridge water-mixing filter comprises a filter unit and a dirt collecting unit;

[0007] The filter unit includes a filter pipe section and a filter cartridge, and the sewage collection unit includes a sewage collection pipe section;

[0008] The filter pipe section is connected to the sewage collecting pipe section, the filter cartridge is inserted into the filter pipe section, and the filter cartridge is arranged above the sewage collecting pipe section and communicated with the sewage collecting pipe section;

[0009] The filter pipe section is provided with a water inlet and a water outlet. The water enters the filter cartridge through the water inlet and then enters the water outlet after being filtered through the side wall of the filter cartridge.

[0010] Furthermore, the filter cartridge includes a ring body, a side wall of which is provided with a filtering through hole, and the mixed water enters from one end of the ring body and enters the mixed water outlet through the filtering through hole.

[0011] Furthermore, the diameter of the filtering through hole is 4 mm.

[0012] Furthermore, the filter cartridge also includes a handle, which is a U-shaped structure and is connected to the ring body.

[0013] Furthermore, the filter unit also includes a cylinder partition, which is arranged in the filter tube section, and the lower end of the filter cylinder abuts against the cylinder partition.

[0014] Furthermore, the cylinder partition is configured as an annular structure.

[0015] Furthermore, the filter unit also includes a filter sealing cover, and the filter sealing cover is threadedly connected to an end of the filter pipe section away from the sewage collecting pipe section.

[0016] Furthermore, the filter unit also includes an inlet flange, an inlet reducer, an outlet reducer and an outlet flange;

[0017] One end of the inlet reducer is connected to the water inlet, and the other end is connected to the inlet flange; one end of the outlet reducer is connected to the water outlet, and the other end is connected to the outlet flange;

[0018] The inlet reducer is arranged above the ring body;

[0019] Along the flow direction of the mixed water, the diameter of the inlet reducer changes from small to large, and the diameter of the outlet reducer changes from large to small.

[0020] Furthermore, the sewage collecting unit also includes a sewage collecting sealing cover, and the sewage collecting sealing cover is threadedly connected to an end of the sewage collecting pipe section away from the filtering pipe section.

[0021] Furthermore, the sewage collecting unit also includes a drain gate, and the drain gate is connected to the sewage collecting pipe section.

[0022] Based on the above technical solutions, the technical effects that can be achieved by the utility model are:

[0023] The straight filter cartridge type water-mixing filter provided by the utility model comprises a filter unit and a sewage collecting unit; the filter unit comprises a filter pipe section and a filter cartridge, and the sewage collecting unit comprises a sewage collecting pipe section; the filter pipe section is connected to the sewage collecting pipe section, the filter cartridge is inserted into the filter pipe section, the filter cartridge is arranged above the sewage collecting pipe section and is connected to the sewage collecting pipe section; a water-mixing inlet and a water-mixing outlet are arranged on the filter pipe section, the water-mixing enters the filter cartridge through the water-mixing inlet, and then enters the water-mixing outlet after being filtered by the side wall of the filter cartridge.

[0024] The straight filter cartridge water filter provided by the utility model filters and collects impurities before the mixed water enters the water spout by setting a filtering unit and a dirt collecting unit, thereby preventing the water spout from being blocked by impurities and blockage caused by the accumulation of impurities. At the same time, the filter can be directly set in front of the water spout by cutting and modifying the pipeline, thereby avoiding being too far away from the water spout and preventing the scale from falling off in the pipeline between the filter and the water spout from affecting the water spout. In addition, the cutting and modification cost is low, the modification is simple, the modification cycle is short, and it has good economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a straight filter cartridge water-mixing filter provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the internal structure of a straight filter cartridge water-mixing filter provided by an embodiment of the utility model;

[0028] Figure 3 Schematic diagram of the structure of the filter cartridge.

[0029] Icons: 100-filter unit; 200-waste collection unit; 110-filter pipe section; 120-filter cartridge; 130-cartridge partition; 140-filter sealing cover; 150-inlet flange; 160-inlet reducer; 170-outlet reducer; 180-outlet flange; 121-ring body; 122-handle; 210-waste collection pipe section; 220-waste collection sealing cover; 230-vent gate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] Due to the high content of impurities in the water mixing machinery at the gathering and transportation station and the scaling and shedding of the pipeline, the water mixing nozzles are blocked, resulting in the inability to achieve normal water mixing and viscosity reduction production.

[0034] In view of this, the utility model provides a straight filter cartridge type water-mixing filter including a filter unit 100 and a sewage collecting unit 200; the filter unit 100 includes a filter pipe section 110 and a filter cartridge 120, and the sewage collecting unit 200 includes a sewage collecting pipe section 210; the filter pipe section 110 is connected to the sewage collecting pipe section 210, the filter cartridge 120 is inserted into the filter pipe section 110, and the filter cartridge 120 is arranged above the sewage collecting pipe section 210 and is connected to the sewage collecting pipe section 210; a water-mixing inlet and a water-mixing outlet are provided on the filter pipe section 110, and the mixed water enters the filter cartridge 120 through the water-mixing inlet, and then enters the water-mixing outlet after being filtered through the side wall of the filter cartridge 120.

[0035] The straight filter cartridge water filter provided by the utility model filters and collects impurities before the mixed water enters the water spout by setting a filter unit 100 and a dirt collecting unit 200, thereby preventing the water spout from being blocked by impurities and blockage caused by the accumulation of impurities. At the same time, the filter can be directly set in front of the water spout by cutting and modifying the pipeline, thereby avoiding being too far away from the water spout and preventing the scale from falling off in the pipeline between the filter and the water spout from affecting the water spout. In addition, the cutting and modification cost is low, the modification is simple, the modification cycle is short, and it has good economic efficiency.

[0036] The following combination Figure 1-Figure 3 The structure and shape of the straight filter cartridge water-mixing filter provided in this embodiment are described in detail:

[0037] In the optional solution of this embodiment, the filter unit 100 includes a filter pipe section 110, a filter cartridge 120, a cartridge partition 130, a filter sealing cover 140, an inlet flange 150, an inlet reducer 160, an outlet reducer 170 and an outlet flange 180, and the sewage collection unit 200 includes a sewage collection pipe section 210, a sewage collection sealing cover 220 and a venting gate 230. Figure 2 shown.

[0038] Specifically, the filter pipe section 110 is configured as a vertical pipe section, one end of which is connected to the sewage collecting pipe section 210, and the other end is threadedly connected to the filter sealing cover 140. The cylinder partition 130 is disposed in the filter pipe section 110 and is located at the lower part of the filter pipe section 110, and is used to limit the lower end of the filter cylinder 120 to prevent it from moving downward. The sewage collecting pipe section 210 includes a horizontal section and a curved section, one end of the curved section is connected to the filter pipe section 110, and the other end is connected to the horizontal section, and the end of the horizontal section away from the curved section is threadedly connected to the sewage collecting sealing cover 220.

[0039] In this embodiment, the filter cartridge 120 includes a ring body 121 and a handle 122. Figure 3 As shown, the handle 122 is connected to the upper end of the ring body 121 and is in a U-shaped structure. The ring body 121 is not blocked at the top and bottom and a filtering hole is opened on the side wall so that the mixed water enters the ring body 121 from the upper end of the ring body 121 and enters the mixed water outlet through the filtering hole.

[0040] In this embodiment, the cylinder partition 130 is configured as an annular structure and abuts against the lower end of the ring body 121 to ensure that the ring body 121 is limited and impurities can fall into the sewage collecting pipe section 210.

[0041] In this embodiment, the position of the water inlet is higher than the water outlet. One end of the inlet reducer 160 is connected to the water inlet, and the other end is connected to the inlet flange 150; one end of the outlet reducer 170 is connected to the water outlet, and the other end is connected to the outlet flange 180. That is, the inlet reducer 160 is arranged above the ring body 121, and the height of the ring body 121 is consistent with the height of the water outlet to ensure that the water enters the water outlet after being filtered by the ring body 121.

[0042] Specifically, along the flow direction of the mixed water, the diameter of the inlet reducer 160 changes from small to large, and the diameter of the outlet reducer 170 changes from large to small, so as to ensure that the flow rate of the mixed water decreases when entering the filter cartridge 120 for filtration, and the original flow rate is restored when leaving the filter cartridge 120. That is, the inner diameter of the ring body 121 is larger than the diameter of the mixed water channel, and the flow rate decreases during the filtration process through the change of the diameter, thereby improving the filtration effect, facilitating the deposition of impurities and preventing impurities from passing through the filter through hole under the action of high flow rate, and at the same time facilitating the impurities to fall into the sewage collecting pipe section 210 under the action of gravity.

[0043] In this embodiment, the vent gate 230 is connected to the sewage collecting pipe section 210 for discharging impurities.

[0044] In this embodiment, the straight filter cartridge water-mixing filter can be made of low-carbon steel, stainless steel and other materials. In order to reduce the difficulty of installation, this embodiment uses low-carbon steel as the main material to facilitate welding. Among them, the filter sealing cover 140 and the dirt collection sealing cover 220 are both welded by a steel pipe with an inner diameter of 76mm and an inner thread and a circular plate with a diameter of 76mm. In order to improve the convenience of disassembly and assembly of the filter sealing cover 140 and the dirt collection sealing cover 220, a flat surface can be milled on the outer cylindrical surface for easy screwing or cooperation with tools. The filter pipe section 110 is made of a steel pipe with a length of 300mm and an inner diameter of 76mm. An external thread is machined at one end of the steel pipe for threaded connection with the filter sealing cover 140, and a water-mixing inlet and a water-mixing outlet are opened on the pipe wall. Specifically, the water-mixing inlet is 100mm away from the upper end face of the filter pipe section 110, and the diameter of the water-mixing inlet is 76mm; the water-mixing outlet is 180mm away from the upper end face of the filter pipe section 110, and the diameter is 76mm. The water inlet and the water outlet are distributed along the diameter direction of the filter pipe section 110 , that is, in the horizontal projection plane, the two are evenly distributed around the axis of the filter pipe section 110 .

[0045] Furthermore, one end of the inlet reducer 160 is welded to the inlet flange 150, and the other end is processed with a saddle mouth with a diameter of 76 mm and welded to the water inlet; at the same time, one end of the outlet reducer 170 is welded to the outlet flange 180, and the other end is processed with a saddle mouth with a diameter of 76 mm and welded to the water outlet. The cylinder partition 130 is 240 mm away from the upper end surface of the filter pipe section 110, and is formed by processing a 75 mm diameter steel plate, processing a 70 diameter through hole in the center, and connected to the filter pipe section 110 by welding.

[0046] In this embodiment, the sewage collecting pipe section 210 uses a steel pipe with a length of 150 mm and an inner diameter of 76 mm as a horizontal section, and an elbow with an inner diameter of 76 mm as a curved section. The filtering pipe section 110 and the horizontal section are connected by welding through the elbow, and an end of the horizontal section away from the curved section is processed with an external thread for threaded connection with the sewage collecting sealing cover 220. The venting gate 230 is connected to the horizontal section of the sewage collecting pipe section 210 through a quarter-section nipple.

[0047] In this embodiment, a stainless steel plate with a thickness of 1 mm is selected to make the ring body 121. After filtering holes with a diameter of 4 mm are uniformly processed on the surface of the steel plate, it is rolled into a ring with an inner diameter of 70 mm and welded into shape.

[0048] The method of using the straight filter cartridge water-mixing filter provided in this embodiment is as follows:

[0049] During operation, close the upper and lower water injection process gates, open the venting gate 230 to drain, then rotate the filter sealing cover 140 to unscrew it, put the filter cartridge 120 into the filter pipe section 110 so that the bottom end of the filter cartridge 120 abuts against the cartridge partition 130, then re-thread the filter sealing cover 140 and the filter pipe section 110 and tighten the filter sealing cover 140, and at the same time, seal the dirt collecting sealing cover 220 and the dirt collecting pipe section 210.

[0050] Afterwards, a cut is made on the water injection process at the wellhead of the oil pump to leave a space equal to the length of the straight-tube filter cartridge water injection filter, and flanges with equal diameters to the inlet flange 150 and the outlet flange 180 are welded to the two cut end faces respectively, and then the flanges are connected with bolts to complete the sealed connection between the straight-tube filter cartridge water injection filter and the prefabricated process, thereby completing the installation.

[0051] When in use, the mixed water passes through the inlet flange 150 and the inlet reducer 160 in sequence to enter the mixed water inlet, and then enters the filter cartridge 120 downward under the action of gravity, then enters the mixed water outlet through the filter through hole and passes through the outlet reducer 170 and the outlet flange 180 in sequence, and finally enters the mixed water nozzle. During the filtration process, since the flow cross section at the filter cartridge 120 becomes larger and the mixed water flow rate decreases, impurities are effectively blocked and fall into the sewage collection pipe section 210 under the action of gravity, which improves the filtration effect and prolongs the maintenance time, and prevents the ordinary filter from being quickly blocked due to the accumulation of impurities.

[0052] When cleaning or replacing the filter cartridge 120, close the upper and lower water mixing process gates, open the venting gate 230 to empty, rotate the filter sealing cap 140 to unscrew it, take out the filter cartridge 120 for cleaning or replacement, then put the filter cartridge 120 back in and tighten the filter sealing cap 140; unscrew the dirt collecting sealing cap 220 to discharge the bottom dirt in the filter pipe section 110, then tighten the dirt collecting sealing cap 220 and the dirt collecting pipe section 210. Finally, close the venting gate 230 and open the upper and lower process gates to complete the bottom dirt cleaning.

[0053] Therefore, the straight-cylinder filter cartridge water-injection filter provided in this embodiment can effectively solve the problems of clogging of water nozzles due to mechanical impurities in water injection and the resulting reduced production efficiency of oil pumps, loss of crude oil production, increased production costs, and increased labor intensity of employees. It can be widely used in the filtration of mechanical impurities in water-injected oil wells during water injection production, and has the advantages of easy on-site installation, simple operation, easy maintenance, low production cost, good stability, and strong adaptability.

[0054] The straight-cylinder filter provided in the present embodiment increases the sedimentation chamber of the sewage collecting pipe section 210 to collect large-size mechanical impurities and sets a single-layer filter for filtering small-size mechanical impurities at the water outlet, combined with the high-in and low-out of the water at the filter pipe section 110, and uses the dual effects of the flushing force of the water and the sinking of the mechanical impurities by their own weight to automatically separate the mechanical impurities from the attached filter screen, preventing the impurities from accumulating and clogging the filter holes, thereby realizing dual filtration relying on the filter screen and gravity, and greatly extending the maintenance time of the filter screen.

[0055] In order to verify the effect of the straight-cylinder filter cartridge, an experimental method simulating on-site working conditions was adopted. Under the conditions of maintaining a certain pressure difference, using water-injecting nozzles of the same specifications and adding mechanical impurities of a certain particle size, within a certain experimental duration, by adding mechanical impurities of a certain particle size, data such as the flow rate and the number of times the water-injecting nozzles are blocked were tracked. The straight-cylinder filter cartridge provided in this embodiment is significantly better than ordinary water-injecting filters in terms of flow rate stability, number of times the water-injecting nozzles are blocked, etc. within the experimental duration, thereby solving the problem of water-injecting nozzle blockage, and the flow rate can remain stable for a long time.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A straight filter cartridge water-mixing filter, characterized in that: It comprises a filtering unit (100) and a dirt collecting unit (200); The filter unit (100) comprises a filter pipe section (110) and a filter cartridge (120), and the sewage collection unit (200) comprises a sewage collection pipe section (210); The filter pipe section (110) is connected to the sewage collecting pipe section (210), the filter cartridge (120) is inserted into the filter pipe section (110), and the filter cartridge (120) is arranged above the sewage collecting pipe section (210) and is in communication with the sewage collecting pipe section (210); The filter pipe section (110) is provided with a water inlet and a water outlet. The water enters the filter cartridge (120) through the water inlet and then enters the water outlet after being filtered through the side wall of the filter cartridge (120).

2. The straight filter cartridge water-mixing filter according to claim 1, characterized in that: The filter cartridge (120) comprises a ring body (121), a side wall of which is provided with a filtering through hole, and the mixed water enters from one end of the ring body (121) and enters the mixed water outlet through the filtering through hole.

3. The straight filter cartridge water-mixing filter according to claim 2, characterized in that: The diameter of the filtering through hole is 4 mm.

4. The straight filter cartridge water-mixing filter according to claim 2, characterized in that: The filter cartridge (120) further comprises a handle (122), wherein the handle (122) is a U-shaped structure and is connected to the ring body (121).

5. The straight filter cartridge water-mixing filter according to claim 2, characterized in that: The filter unit (100) further comprises a cylinder partition (130), wherein the cylinder partition (130) is arranged in the filter tube section (110), and the lower end of the filter cylinder (120) abuts against the cylinder partition (130).

6. The straight filter cartridge water-mixing filter according to claim 5, characterized in that: The cylinder partition (130) is configured as an annular structure.

7. The straight filter cartridge water-mixing filter according to claim 6, characterized in that: The filter unit (100) further comprises a filter sealing cover (140), wherein the filter sealing cover (140) is threadedly connected to an end of the filter pipe section (110) away from the sewage collecting pipe section (210).

8. The straight filter cartridge water-mixing filter according to claim 7, characterized in that: The filter unit (100) further comprises an inlet flange (150), an inlet reducer (160), an outlet reducer (170) and an outlet flange (180); One end of the inlet reducer (160) is connected to the water inlet, and the other end is connected to the inlet flange (150); one end of the outlet reducer (170) is connected to the water outlet, and the other end is connected to the outlet flange (180); The inlet reducer (160) is arranged above the ring body (121); Along the flow direction of the mixed water, the diameter of the inlet reducer (160) changes from small to large, and the diameter of the outlet reducer (170) changes from large to small.

9. The straight filter cartridge water-mixing filter according to claim 8, characterized in that: The sewage collecting unit (200) further comprises a sewage collecting sealing cover (220), wherein the sewage collecting sealing cover (220) is threadedly connected to an end of the sewage collecting pipe section (210) away from the filtering pipe section (110).

10. The straight filter cartridge water-mixing filter according to claim 9, characterized in that: The sewage collecting unit (200) further comprises a drain gate (230), and the drain gate (230) is connected to the sewage collecting pipe section (210).

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