Sand filter for producing well

Abstract

The utility model belongs to the technical field of oil production wells, and particularly relates to an oil production well sand filter which comprises a processing cylinder and a primary filtering device, a cover is connected to an ejector rod on the upper surface of the processing cylinder, a driver is fixedly connected to the upper surface of the cover, and the upper surface of the cover is communicated with a feeding pipe; a primary filtering device is arranged on the surface of the feeding pipe and comprises a storage barrel, the storage barrel is located on the upper surface of the feeding pipe, a plurality of storage grooves are formed in the surface of the storage barrel, a frame is inserted into the inner walls of the storage grooves of the storage barrel, a filtering disc is fixedly connected to the inner surface of the frame, and a guiding device is arranged on the surface of the storage barrel and comprises a fixing ring. The inner surface of the fixing ring is fixedly connected with the surface of the storage barrel, a funnel is inserted into the inner wall of the fixing ring, and a backing ring is fixedly connected to the surface of the funnel; petroleum can be primarily filtered by arranging the storage cylinder, the filter disc and the sealing cover, and meanwhile, the filter discs of different specifications can be mounted, so that gravel of different specifications can be filtered.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production wells, in particular to a sand filter for oil production wells. Background Art

[0002] Oil wells are formed by drilling a wellbore, then inserting a casing into the wellbore, and injecting cement slurry into the space between the casing and the formation annulus to reinforce the wellbore (cementing), and then completing the well (perforating or open hole), equipped with ground wellhead equipment, to form a channel for oil and gas extraction. Crude oil is buried deep underground, and its upper part is covered by thousands of meters of thick rocks and surface soil, which accumulates a large amount of elastic energy for the crude oil and the rocks that store it. This type of oil well is called a self-flowing oil well.

[0003] A Chinese patent application CN210933949U discloses an oil well sand filter, the main points of its technical solution are: when filtering sand from oil, workers control the motor through a switch, the motor drives the scraper to rotate through a rotating shaft, the scraper rotates to scrape up the sand remaining on the filter screen, and under the action of centrifugal force, it is thrown into a collection box through a sewage outlet and a sewage inlet, and then the worker stops supplying oil to the box when the collection box is almost full of sand, and then when the oil is lower than the surface of the filter screen, the worker opens the first valve to allow the sand to be discharged from the collection box through the sewage pipe.

[0004] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: when oil is extracted, it is necessary to filter the sand and gravel in the oil, and some filters will install a primary filter screen at the feed inlet. Since most primary filter structures can only be equipped with one filter screen, the size of the sand and gravel will change due to regional characteristics in actual use, which may lead to the problem that the traditional filter screen cannot achieve the filtering effect; therefore, a sand filter for oil wells is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes an oil well sand filter, comprising a treatment cylinder and a primary filtering device, the upper surface top rod of the treatment cylinder is connected with a cover, the upper surface of the cover is fixedly connected with a driving machine, and the upper surface of the cover is connected with a feed pipe; the surface of the feed pipe is provided with a primary filtering device, and the primary filtering device comprises a receiving cylinder, the receiving cylinder is located on the upper surface of the feed pipe, a plurality of receiving grooves are opened on the surface of the receiving cylinder, a frame is inserted into the inner wall of the receiving groove of the receiving cylinder, a filter disc is fixedly connected to the inner surface of the frame, the frame and the filter disc are inserted into the inner wall of the receiving groove of the receiving cylinder, when the oil moves, the oil will pass through the filter disc in the frame, and the setting of the filter disc can perform preliminary filtering.

[0007] Preferably, a sealing cover is provided on the surface of the storage tube, and the sealing cover and the inner wall of the storage tube are threadedly connected with four positioning pins, and the positioning pins are rotated to the sealing cover and the inner wall of the storage tube. The provision of the sealing cover can increase the sealing performance of the storage tube.

[0008] Preferably, the inner walls of the storage cylinder and the feed tube are threadedly connected with a plurality of fixing pins. After the storage cylinder is attached to the feed tube, the fixing pins are rotated to the inner walls of the storage cylinder and the feed tube, and the fixing pins can fix the position of the storage cylinder.

[0009] Preferably, a handle is fixedly connected to the surface of the sealing cover. When the sealing cover needs to be moved, the handle is pulled to allow the sealing cover to move. The setting of the handle can facilitate the movement of the sealing cover.

[0010] Preferably, a plurality of top rings are fixedly connected to the inner surface of the sealing cover, and the top rings are located on the surface of the frame. When the sealing cover moves, the sealing cover drives the top rings to slide, and the top rings press against the surface of the frame. The setting of the top rings can limit the position of the frame.

[0011] Preferably, a guide device is provided on the surface of the storage cylinder, and the guide device includes a fixed ring, the inner surface of the fixed ring is fixedly connected to the surface of the storage cylinder, a funnel is inserted into the inner wall of the fixed ring, and a gasket is fixedly connected to the surface of the funnel. When the oil flows, the oil will enter the inner wall of the storage cylinder through the funnel. The setting of the funnel can increase the size of the feeding port of the storage cylinder, thereby reducing the leakage of oil.

[0012] Preferably, the inner wall of the fixing ring is threadedly connected with a plurality of threaded rods, and the side walls of the threaded rods are rotatably connected to a limiting ring, and the limiting ring is located on the upper surface of the gasket. The threaded rods will drive the limiting ring to move, and the limiting ring moves to the surface of the gasket, and the threaded rods and the limiting ring can limit the position of the gasket.

[0013] The utility model is beneficial in that:

[0014] 1. When the utility model needs to filter the petroleum, the storage cylinder is fitted into the feed pipe, and the fixing pin is rotated to the inner wall of the storage cylinder and the feed pipe, and then the frame is pushed to allow the frame to drive the filter disc to be inserted into the inner wall of the storage groove of the storage cylinder, and then the handle is held to align the sealing cover with the storage cylinder, and then the handle is pushed to allow the handle to drive the sealing cover to move, and the sealing cover is sleeved on the surface of the storage cylinder, and then the positioning pin is rotated to the sealing cover and the inner wall of the storage cylinder. When the sealing cover moves, it will drive the top ring to move, and the top ring will press against the surface of the frame. When the petroleum flows, the petroleum will pass through the filter disc in the storage cylinder, and then enter the processing cylinder through the feed pipe. By arranging the storage cylinder, the filter disc and the sealing cover, the petroleum can be initially filtered, and filter discs of different specifications can be installed at the same time, so as to complete the filtering of sand and gravel of different specifications.

[0015] 2. When filtering is needed, the utility model aligns the funnel with the fixed ring, and then pushes the funnel to drive the gasket ring to move, the gasket ring is inserted into the inner wall of the fixed ring, and then the threaded rod is rotated to allow the threaded rod to rotate on the inner wall of the fixed ring. When the threaded rod rotates, it will also rotate on the surface of the limit ring, and the limit ring will be moved by the threaded rod. The limit ring moves to the surface of the gasket ring. By setting the funnel, the size of the feed port of the storage cylinder can be increased, thereby reducing the leakage of oil, and the fixed ring, threaded rod and limit ring can fix the position of the funnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a processing cylinder in an oil well sand filter;

[0018] Figure 2 A sand filter for oil wells Figure 1 A schematic diagram of the structure at A;

[0019] Figure 3 It is a schematic diagram of the side view structure of a processing cylinder in a sand filter of an oil well;

[0020] Figure 4 A sand filter for oil wells Figure 3 Schematic diagram of the structure at B;

[0021] Figure 5 The diagram is a top view of the structure of a processing tube in an oil well sand filter.

[0022] In the figure: 1. treatment cylinder; 2. cover; 3. drive motor; 4. feed pipe; 5. primary filter device; 51. storage cylinder; 52. storage tank; 53. frame; 54. filter plate; 55. sealing cover; 56. positioning pin; 57. handle; 58. top ring; 59. fixing pin; 6. guide device; 61. fixing ring; 62. funnel; 63. gasket; 64. threaded rod; 65. limit ring. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-5 As shown, an oil well sand filter comprises a treatment cylinder 1 and a primary filtering device 5, wherein a top rod on the upper surface of the treatment cylinder 1 is connected to a cover 2, a driving machine 3 is fixedly connected to the upper surface of the cover 2, and a feed pipe 4 is communicated with the upper surface of the cover 2; a primary filtering device 5 is provided on the surface of the feed pipe 4, and the primary filtering device 5 comprises a receiving cylinder 51, wherein the receiving cylinder 51 is located on the upper surface of the feed pipe 4, a plurality of receiving grooves 52 are provided on the surface of the receiving cylinder 51, a frame 53 is inserted into the inner wall of the receiving groove 52 of the receiving cylinder 51, and a filter disc 54 is fixedly connected to the inner surface of the frame 53; during operation, the receiving cylinder 51 is fixed to the surface of the feed pipe 4, and then the frame 53 is pushed to allow the frame 53 to drive the filter disc 54, the frame 53 and the filter disc 54 are inserted into the inner wall of the receiving groove 52 of the receiving cylinder 51, and when the oil moves, the oil passes through the filter disc 54 in the frame 53, and the setting of the filter disc 54 can perform preliminary filtering.

[0025] The surface of the storage tube 51 is covered with a sealing cover 55, and the sealing cover 55 and the inner wall of the storage tube 51 are threadedly connected with four positioning pins 56; when working, the sealing cover 55 is covered on the surface of the storage tube 51, and then the positioning pins 56 are rotated to the sealing cover 55 and the inner wall of the storage tube 51. The setting of the sealing cover 55 can increase the sealing performance of the storage tube 51.

[0026] The inner walls of the storage cylinder 51 and the feed tube 4 are threadedly connected with a plurality of fixing pins 59 ; during operation, the fixing pins 59 are rotated to the inner walls of the storage cylinder 51 and the feed tube 4 , and the fixing pins 59 can fix the position of the storage cylinder 51 .

[0027] A handle 57 is fixedly connected to the surface of the sealing cover 55 . When working, the handle 57 is pulled to drive the sealing cover 55 to move. The setting of the handle 57 can facilitate the movement of the sealing cover 55 .

[0028] The inner surface of the sealing cover 55 is fixedly connected with a plurality of top rings 58 , and the top rings 58 are located on the surface of the frame 53 . During operation, the sealing cover 55 drives the top rings 58 to slide, and the top rings 58 are pressed against the surface of the frame 53 . The setting of the top rings 58 can limit the position of the frame 53 .

[0029] A guide device 6 is provided on the surface of the storage cylinder 51, and the guide device 6 includes a fixed ring 61. The inner surface of the fixed ring 61 is fixedly connected to the surface of the storage cylinder 51. A funnel 62 is inserted into the inner wall of the fixed ring 61, and a gasket 63 is fixedly connected to the surface of the funnel 62. When working, the funnel 62 is pushed to allow the funnel 62 to drive the gasket 63 to move, and the gasket 63 is inserted into the inner wall of the fixed ring 61. When the oil flows, the oil will enter the inner wall of the storage cylinder 51 through the funnel 62. The setting of the funnel 62 can increase the size of the feed port of the storage cylinder 51, thereby reducing the leakage of oil.

[0030] The inner wall of the fixing ring 61 is threadedly connected with a plurality of threaded rods 64, and the side wall of the threaded rod 64 is rotatably connected to a limiting ring 65, and the limiting ring 65 is located on the upper surface of the gasket ring 63; during operation, the threaded rod 64 is rotated to allow the threaded rod 64 to rotate on the inner wall of the fixing ring 61, and the threaded rod 64 will drive the limiting ring 65 to move, and the limiting ring 65 moves to the surface of the gasket ring 63, and the threaded rod 64 and the limiting ring 65 can limit the position of the gasket ring 63.

[0031] Working principle: when it is necessary to filter the oil, fit the storage cylinder 51 against the feed pipe 4, and then rotate the fixing pin 59 to the inner wall of the storage cylinder 51 and the feed pipe 4, and then push the frame 53 to allow the frame 53 to drive the filter disc 54 to be inserted into the inner wall of the storage groove 52 of the storage cylinder 51, and then hold the handle 57 to align the sealing cover 55 with the storage cylinder 51, and then push the handle 57 to allow the handle 57 to drive the sealing cover 55 to move, and the sealing cover 55 is sleeved on the surface of the storage cylinder 51, and then rotate the positioning pin 56 to the sealing cover 55 and the inner wall of the storage cylinder 51. When the sealing cover 55 moves, it will drive the top ring 58 to move, and the top ring 58 will press against the surface of the frame 53. When the oil flows, the oil will pass through the filter disc 54 in the storage cylinder 51, and then enter the processing cylinder 1 through the feed pipe 4. By setting the storage cylinder 51, The filter disc 54 and the sealing cover 55 can perform preliminary filtration on the petroleum, and filter discs 54 of different specifications can be installed at the same time, so as to filter sand and gravel of different specifications; when filtering is needed, align the funnel 62 with the fixing ring 61, and then push the funnel 62 to drive the gasket 63 to move, and the gasket 63 is inserted into the inner wall of the fixing ring 61, and then rotate the threaded rod 64 to allow the threaded rod 64 to rotate on the inner wall of the fixing ring 61. When the threaded rod 64 rotates, it will also rotate on the surface of the limit ring 65, and the limit ring 65 will be moved by the threaded rod 64. The limit ring 65 moves to the surface of the gasket 63. By setting the funnel 62, the size of the feed port of the storage tube 51 can be increased, thereby reducing the leakage of petroleum, and the fixing ring 61, the threaded rod 64 and the limit ring 65 can fix the position of the funnel 62.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An oil well sand filter, comprising a treatment cylinder (1) and a primary filtering device (5), wherein a top rod on the upper surface of the treatment cylinder (1) is connected to a cover (2), a driving machine (3) is fixedly connected to the upper surface of the cover (2), and a feed pipe (4) is connected to the upper surface of the cover (2); characterized in that: The surface of the feed pipe (4) is provided with a primary filter device (5), and the primary filter device (5) comprises a storage cylinder (51), the storage cylinder (51) is located on the upper surface of the feed pipe (4), a plurality of storage grooves (52) are opened on the surface of the storage cylinder (51), a frame (53) is inserted into the inner wall of the storage groove (52) of the storage cylinder (51), and a filter disc (54) is fixedly connected to the inner surface of the frame (53).

2. The oil well sand filter according to claim 1, characterized in that: The surface of the storage cylinder (51) is covered with a sealing cover (55), and the sealing cover (55) and the inner wall of the storage cylinder (51) are threadedly connected with four positioning pins (56).

3. The oil well sand filter according to claim 1, characterized in that: The inner walls of the storage cylinder (51) and the feed pipe (4) are threadedly connected with a plurality of fixing pins (59).

4. The oil well sand filter according to claim 2, characterized in that: A handle (57) is fixedly connected to the surface of the sealing cover (55).

5. The oil well sand filter according to claim 2, characterized in that: A plurality of top rings (58) are fixedly connected to the inner surface of the sealing cover (55), and the top rings (58) are located on the surface of the frame (53).

6. The oil well sand filter according to claim 1, characterized in that: The surface of the storage tube (51) is provided with a guide device (6), and the guide device (6) comprises a fixing ring (61), the inner surface of the fixing ring (61) is fixedly connected to the surface of the storage tube (51), a funnel (62) is inserted into the inner wall of the fixing ring (61), and a gasket ring (63) is fixedly connected to the surface of the funnel (62).

7. The oil well sand filter according to claim 6, characterized in that: The inner wall of the fixing ring (61) is threadedly connected to a plurality of threaded rods (64), and the side walls of the threaded rods (64) are rotatably connected to a limiting ring (65), and the limiting ring (65) is located on the upper surface of the gasket ring (63).

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