Wellhead filter of water injection well

Abstract

The utility model discloses a water injection well mouth filter which comprises a box cover and a box body, the box cover and the box body are fixedly connected through a bolt, one end of the bolt penetrates through the box cover and the box body, and the box body is provided with a fixing plate which is located in the box body and fixedly connected with the inner wall of the box body. The top of the fixing plate is provided with a hydraulic rod located on one side and rotationally connected with the fixing plate through a first rotating shaft, the top of the hydraulic rod is rotationally connected with a filter screen located above the fixing plate through a second rotating shaft, one side of the filter screen is rotationally connected with a fixing rod, and the bottom end of the fixing rod is fixedly connected with the fixing plate; one side of the fixing plate is fixedly connected with a water guide plate, one side of the water guide plate is fixedly connected with a water guide opening, the box body is provided with an impurity removal device located on one side and fixedly connected with the box body, the box body is provided with a water pump located in the box body, and the bottom of the water pump and the bottom of an inner cavity of the box body are detachably installed. According to the utility model, the impurity removal device is arranged, so that the filtering precision of a water body is improved, and the internal cleaning difficulty of the filter is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field equipment, in particular to a wellhead filter for a water injection well. Background Art

[0002] The working principle of oil field water injection is to increase the formation pressure by injecting high-pressure water into the oil layer, thereby pushing the crude oil to the wellhead and improving the oil recovery efficiency. At the same time, water injection can also dilute the sulfur-containing and nitrogen-containing substances in the crude oil, reduce the viscosity of the crude oil, and make it easier to be mined. The water body needs to be filtered before water injection. In the existing technology equipment, the impurities filtered out still remain inside the equipment, and it is necessary to manually open the equipment and disassemble and clean the filter screen inside the equipment, which is time-consuming and labor-intensive, and reduces the working efficiency of the wellhead filter of the water injection well. Utility Model Content

[0003] The purpose of the present application is to provide a wellhead filter for a water injection well to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a wellhead filter of a water injection well, comprising a box cover and a box body, the top of the box cover is provided with a water inlet located on one side and fixedly connected thereto, the water inlet is sleeved with a sealing ring fixedly connected to the top of the box cover, the box cover and the box body are fixedly connected by bolts passing through the box cover and the box body at one end, the box body is provided with a fixing plate located inside the box body and fixedly connected to the inner wall of the box body, the top of the fixing plate is provided with a hydraulic rod located on one side and rotatably connected to the fixing plate through a first rotating shaft, the top of the hydraulic rod is rotatably connected to a filter screen located above the fixing plate through a second rotating shaft, one side of the filter screen is rotatably connected to a fixing rod, the bottom end of the fixing rod is fixedly connected to the fixing plate, one side of the fixing plate is fixedly connected to a water guide plate, one side of the water guide plate is fixedly connected to a water guide port, the box body is provided with a debris removal device located on one side and fixedly connected thereto, the box body is provided with a water pump located inside the box body, and the bottom of the water pump is detachably mounted to the bottom of the inner cavity of the box body.

[0005] Preferably, the impurity removal device includes a device body, a water inlet pipe is sleeved on one side of the water pump, the water inlet pipe passes through one end of the box and is connected to the device body, and a drain pipe is sleeved on the other side of the water pump, the drain pipe passes through one end inside the box and is connected to the box.

[0006] Preferably, a plurality of water guide holes evenly spaced apart are provided on one side of the device body.

[0007] Preferably, the device body is provided with a track located inside the device body and fixedly connected to both sides of the inner wall of the device body.

[0008] Preferably, tracks on both sides of the inner wall of the device body are slidably connected with a filter drawer located inside the device body and pullable from one side, and a handle is provided on one side of the filter drawer.

[0009] Preferably, the water guide plate is arranged at an angle.

[0010] Preferably, one side of the box body is provided with a power box fixedly connected thereto.

[0011] In summary, the technical effects and advantages of the utility model are:

[0012] In the utility model, a water pump is provided to quickly convey filtered water to the wellhead of the injection well, thereby improving the water conveying efficiency; a filter screen is provided to filter the water once; a hydraulic rod is provided to extend and retract the filter screen to drive the filter screen to swing, thereby loosening impurities on the surface of the filter screen and separating them from the filter screen, thereby avoiding the need to disassemble the filter and separately clean the interior; a water guide plate is provided to guide the filtered water to enter the interior of the impurity removal device through the water guide port and the water guide hole; the impurity removal device is provided to perform a secondary filtration on the water that has been filtered once, and the remaining impurities that have separated from the filter screen are collected through the filter drawer for cleaning, thereby improving the filtering accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a three-dimensional schematic diagram of a wellhead filter for a water injection well in an embodiment of the present application;

[0015] Figure 2 This is a schematic diagram of the internal structure of a wellhead filter for a water injection well in an embodiment of the present application.

[0016] In the figure: 1. box cover; 2. box body; 3. water inlet; 4. sealing ring; 5. filter screen; 6. fixing rod; 7. bolt; 8. first rotating shaft; 9. hydraulic rod; 10. second rotating shaft; 11. drain pipe; 12. water pump; 13. water inlet pipe; 14. water guide plate; 15. filter drawer; 16. handle; 17. track; 18. water guide hole; 19. device body; 20. water guide port; 21. impurity removal device; 22. fixing plate; 23. power box. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] It should also be noted that the standard parts used in this application document can be purchased from the market, and can be customized according to the description in the specification and drawings. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to the specific circumstances, and in the absence of clear limitations, machines, parts and equipment can all adopt conventional models in the prior art.

[0020] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0021] Example: Reference Figure 1-2The wellhead filter of a water injection well shown in the figure comprises a box cover 1 and a box body 2. The top of the box cover 1 is provided with a water inlet 33 located on one side and fixedly connected thereto. The water inlet 33 is sleeved with a sealing ring 4 fixedly connected to the top of the box cover 1. The box cover 1 and the box body 2 are fixedly connected by a bolt 7 whose one end passes through the box cover 1 and the box body 2. The box body 2 is provided with a fixing plate 22 located inside the box body 2 and fixedly connected to the inner wall of the box body 2. The top of the fixing plate 22 is provided with a hydraulic rod 9 located on one side and rotatably connected to the fixing plate 22 through a first rotating shaft 8. The top of the hydraulic rod 9 is rotatably connected to a fixing plate 22 located inside the box body 2 and fixedly connected to the fixing plate 22 through a first rotating shaft 8. The filter screen 5 is above the fixed plate 22, and one side of the filter screen 5 is rotatably connected to a fixed rod 6, the bottom end of the fixed rod 6 is fixedly connected to the fixed plate 22, one side of the fixed plate 22 is fixedly connected to a water guide plate 14, and one side of the water guide plate 14 is fixedly connected to a water guide port 20. The box body 2 is provided with a debris removal device 21 located on one side and fixedly connected thereto, and the box body 2 is provided with a water pump 12 located inside the box body 2, and the bottom of the water pump 12 is detachably installed with the bottom of the inner cavity of the box body 2. By setting the debris removal device 21, the water body can be secondary filtered and impurities can be collected, and the cleaning difficulty is low, thereby improving the working efficiency of the filter.

[0022] By means of the above structure: the impurity removal device 21 includes a device body 19, a water inlet pipe 13 is sleeved on one side of the water pump 12, and the water inlet pipe 13 passes through one end of the box body 2 and is connected to the device body 19, and the other side of the water pump 12 is sleeved with a drain pipe 11, and one end of the drain pipe 11 passes through the inside of the box body 2 and is connected to the box body 2, so as to facilitate the transportation of filtered water.

[0023] With the above structure, a plurality of water guide holes 18 evenly spaced apart are provided on one side of the device body 19 , which facilitates water to enter the interior of the impurity removal device 21 .

[0024] With the above structure, the device body 19 is provided with a track 17 located inside the device body 19 and fixedly connected to both sides of the inner wall of the device body 19 , so that the filter drawer 15 can slide on the track 17 .

[0025] With the above structure: the tracks 17 on both sides of the inner wall of the device body 19 are slidably connected with a filter drawer 15 located inside the device body 19 and pullable from one side. A handle 16 is provided on one side of the filter drawer 15, and the handle 16 can pull out the filter drawer 15, which is convenient for subsequent cleaning of the filter drawer 15.

[0026] With the above structure, the water guide plate 14 is inclined to facilitate guiding the water to flow into the impurity removal device 21 .

[0027] With the above structure: a power supply box 23 fixedly connected to one side of the box body 2 is provided to provide power for the filter.

[0028] Working principle of this embodiment: When the filter needs to work, turn on the power in the power box 23, and then inject water into the interior from the water inlet 33. The water is filtered once through the filter 5. The filtered water reaches the fixed plate 22. The water guide plate 14 guides the filtered water through the water guide port 20 and the water guide hole 18 to enter the impurity removal device 21. The impurity removal device 21 performs a secondary filtration on the water that has been filtered once and the impurities that have been separated from the filter 5 after vibration. The filter drawer 15 can filter the water and collect the impurities that have been separated from the filter 5 after vibration. The filtered water reaches the impurity removal device 2 1, the water pump 12 inside the box body 2 pumps out water through the water inlet pipe 13 connected to the bottom of the impurity removal device 21, and then discharges water through the drain pipe 11. After being transported to the wellhead of the water injection well, the water pump 12 stops working, and the hydraulic rod 9 rotatably connected to the fixed plate 22 is extended and retracted to perform a swinging motion, which drives the filter screen 5 to perform a swinging motion, causing the impurities on the surface of the filter screen 5 to loosen and separate from the filter screen 5. The collected impurities that are separated from the filter screen 5 after vibration are poured out or cleaned through the filter drawer 15 that can be pulled out by the handle 16, which reduces the difficulty of cleaning and further improves the working efficiency of the filter.

[0029] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water injection well wellhead filter, comprising a box cover and a box body, characterized in that: The top of the box cover is provided with a water inlet located on one side and fixedly connected thereto, the water inlet is sleeved with a sealing ring fixedly connected to the top of the box cover, the box cover and the box body are fixedly connected by bolts passing through the box cover and the box body at one end, the box body is provided with a fixing plate located inside the box body and fixedly connected to the inner wall of the box body, the top of the fixing plate is provided with a hydraulic rod located on one side and rotatably connected to the fixing plate through a first rotating shaft, the top of the hydraulic rod is rotatably connected to a filter screen located above the fixing plate through a second rotating shaft, one side of the filter screen is rotatably connected to a fixing rod, the bottom end of the fixing rod is fixedly connected to the fixing plate, one side of the fixing plate is fixedly connected to a water guide plate, one side of the water guide plate is fixedly connected to a water guide port, the box body is provided with a debris removal device located on one side and fixedly connected thereto, the box body is provided with a water pump located inside the box body, and the bottom of the water pump is detachably mounted to the bottom of the inner cavity of the box body.

2. A water injection well wellhead filter according to claim 1, characterized in that: The impurity removal device includes a device body, a water inlet pipe is sleeved on one side of the water pump, and one end of the water inlet pipe passes through the box and is connected to the device body, and the other side of the water pump is sleeved on a drain pipe, and one end of the drain pipe passes through the inside of the box and is connected to the box.

3. A water injection well wellhead filter according to claim 2, characterized in that: One side of the device body is provided with a plurality of water guide holes which are evenly spaced and distributed.

4. A water injection well wellhead filter according to claim 2, characterized in that: The device body is provided with tracks located inside the device body and fixedly connected to two sides of the inner wall of the device body.

5. A water injection well wellhead filter according to claim 3, characterized in that: Tracks on both sides of the inner wall of the device body are slidably connected with a filter drawer located inside the device body and can be pulled out from one side, and a handle is provided on one side of the filter drawer.

6. A water injection well wellhead filter according to claim 1, characterized in that: The water guide plate is arranged obliquely.

7. A water injection well wellhead filter according to claim 1, characterized in that: One side of the box body is provided with a power supply box fixedly connected thereto.

Images