Downhole water distributor of layered water injection well

Abstract

The utility model provides a separate layer water injection well underground water distributor which comprises an inner pipe, two water distribution nozzles are arranged on the outer side of the bottom end of the inner pipe, a lower connector is fixedly installed at the bottom end of the inner pipe, a rubber seat is arranged at the top of the lower connector, a drainage ring is fixedly installed at the bottom end of the rubber seat, and the drainage ring is fixedly connected with the inner pipe. The drainage device has the advantages that when the rubber seat is arranged in the inner pipe and outputs water from the inside of the inner pipe to the outside through the water distribution nozzle, the rubber seat is compressed and lifted by the discharged water, and the water distribution nozzle can discharge water from the inside of the inner pipe to the outside, so that the water distribution nozzle can discharge water from the inside of the inner pipe, and the water distribution nozzle can discharge water from the inside of the inner pipe to the outside. The drainage ring can be driven to move upwards while the bottom end of the rubber seat moves upwards, so that the position of the drainage hole in the drainage ring can be moved to the position between the bottom end of the rubber seat and the top end of the lower connector, and water can be output outwards more conveniently through the drainage holes formed in the periphery of the drainage ring; and the use performance of the whole layered water distributor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water distributors, and in particular relates to an underground water distributor for a stratified water injection well. Background Art

[0002] Water distributor is a special downhole tool used to quantitatively inject water into each oil layer during stratified water injection. At present, the main defects of water distributor are as follows:

[0003] During the use of traditional water distributors, the drainage effect will be affected by the water distribution nozzles inside the water distributor while stratifying the drainage, resulting in a low drainage effect of the water distribution nozzles on the inner tube, and the water inside the inner tube cannot be discharged more efficiently and quickly after stratification, thereby reducing the overall use effect of the stratified water distributor. Utility Model Content

[0004] The purpose of the utility model is to provide an underground water distributor for a stratified water injection well, aiming to solve the problem in the prior art that the water inside the inner tube cannot be discharged outward more efficiently and quickly after stratification, thereby reducing the use effect of the overall stratified water distributor.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A downhole water distributor for a stratified water injection well comprises an inner tube, two water distribution nozzles are arranged on the outer side of the bottom end of the inner tube, a lower joint is fixedly installed on the bottom end of the inner tube, a rubber seat is arranged on the top of the lower joint, a drainage ring is fixedly installed on the bottom end of the rubber seat, a plurality of drainage holes are arranged around the drainage ring, and valve plates are rotatably connected to the inner walls of the plurality of drainage holes.

[0007] As a preferred embodiment of the utility model, a limit spring is fixedly installed inside the rubber seat, and the inner wall of the rubber seat is slidably connected to the outer side of the inner tube.

[0008] As a preferred embodiment of the utility model, a plurality of extension rods are fixedly mounted on the top of the rubber seat, an upper joint is fixedly mounted on the top of the inner tube, and the bottom end of the upper joint is fixedly connected to the top end of the extension rod.

[0009] As a preferred embodiment of the utility model, a limiting ring is fixedly installed on the bottom end of the drainage ring, and the outer sides of the bottom ends of the limiting ring and the drainage ring are slidably connected to the inner side wall of the lower joint.

[0010] As a preferred embodiment of the utility model, a rotating shaft is fixedly installed on the inner side of the valve plate through an opening, and both ends of the rotating shaft are rotatably connected to the inner wall of the drain ring.

[0011] As a preferred embodiment of the present invention, a semicircular gravity block is fixedly mounted on the inner wall of the bottom end of the valve plate.

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

[0013] 1) When the rubber seat is received in the inner tube and water is discharged from the water distribution nozzle to the outside, the discharged water compresses and lifts the rubber seat, so that the bottom end of the rubber seat moves upward and can drive the drainage ring to move upward, so that the position of the drainage hole on the drainage ring can be moved to between the bottom end of the rubber seat and the top end of the lower joint, so that it is easier to discharge water outward through the drainage holes arranged around the drainage ring, thereby improving the performance of the overall layered water distributor.

[0014] 2) The limit ring is set to slide up and down inside the lower joint following the drain ring, so that the maximum height of the limit ring's upward movement is maintained inside the lower joint, thereby effectively preventing the drain ring from detaching from the lower joint when moving upward. The semicircular gravity block is also set to further improve the closure of the valve plate to the drain hole position when it is not affected by the water force inside the inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the rubber seat of the utility model;

[0018] Figure 3 This is a schematic diagram of the inner tube structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the lower joint of the utility model;

[0020] Figure 5 It is a schematic diagram of the internal structure of the drainage ring of the utility model.

[0021] In the figure: 1. inner tube; 2. water distribution nozzle; 3. lower joint; 4. rubber seat; 5. drain ring; 6. drain hole; 7. valve plate; 8. limit spring; 9. extension rod; 10. upper joint; 11. limit ring; 12. rotating shaft; 13. semicircular gravity block. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-5 The utility model provides the following technical solutions: an underground water distributor for a stratified water injection well, comprising an inner tube 1, two water distribution nozzles 2 are provided on the outer side of the bottom end of the inner tube 1, a lower joint 3 is fixedly installed on the bottom end of the inner tube 1, a rubber seat 4 is provided on the top of the lower joint 3, a drainage ring 5 is fixedly installed on the bottom end of the rubber seat 4, a plurality of drainage holes 6 are provided around the drainage ring 5, and valve plates 7 are rotatably connected to the inner walls of the plurality of drainage holes 6.

[0024] During specific use, when the stratified water distributor is used, the inner tube 1 outputs the water inside it to the outside through the water distribution nozzle 2. At this time, the water pressure between the lower joint 3 and the rubber seat 4 can be used. While the rubber seat 4 is moved upward and compressed by the water pressure, the bottom end of the rubber seat 4 can be moved upward, so that the inside of the stratified device such as the outer tube can be stratified through the contact between the rubber seat 4 and the outer tube. While the bottom end of the rubber seat 4 moves upward, it can drive the drainage ring 5 at its bottom to slide upward. After the drainage ring 5 moves to the drainage hole 6 is completely exposed and the rubber seat 4 is stratified, the water inside the inner tube 1 can be discharged through the water distribution nozzle 2 through the water pressure on the valve plate 7, so that the valve plate 7 rotates on the drainage ring 5, and the water inside the inner tube 1 is effectively discharged through the drainage hole 6 through the water distribution nozzle 2 and the multiple drainage holes 6 on the drainage ring 5.

[0025] Preferably, a limit spring 8 is fixedly installed inside the rubber seat 4 , and the inner wall of the rubber seat 4 is slidably connected to the outer side of the inner tube 1 .

[0026] During specific use, the top and bottom of the rubber seat 4 are both in a hard state, so that when the bottom end is subjected to external force, the limit spring 8 inside can be compressed, and the rubber in the middle part of the rubber seat 4 is compressed outward to be layered.

[0027] Preferably, a plurality of extension rods 9 are fixedly mounted on the top of the rubber seat 4 , an upper joint 10 is fixedly mounted on the top of the inner tube 1 , and the bottom end of the upper joint 10 is fixedly connected to the top end of the extension rod 9 .

[0028] When in use, the rubber seat 4 is compressed by water pressure, and its top end is kept stable by the extension rod 9 and the upper joint 10, so that when the bottom end is acted by external force, the rubber in the middle position is squeezed outward to be layered.

[0029] Preferably, a limiting ring 11 is fixedly installed on the bottom end of the drain ring 5 , and the limiting ring 11 and the outer side of the bottom end of the drain ring 5 are slidably connected to the inner side wall of the lower joint 3 .

[0030] During specific use, when the drain ring 5 moves upward driven by the rubber seat 4, it can simultaneously drive the limit ring 11 to slide inside the lower joint 3, and can only slide to the topmost position inside the drain ring 5, thereby preventing the drain ring 5 from moving and separating from the lower joint 3 during the compression of the rubber seat 4.

[0031] Preferably, a rotating shaft 12 is fixedly mounted on the inner side of the valve plate 7 through an opening, and both ends of the rotating shaft 12 are rotatably connected to the inner side wall of the drain ring 5 .

[0032] During specific use, when the valve plate 7 is subjected to water pressure, the rotating shaft 12 can make it convenient and stable to rotate on the inner wall of the drainage hole 6, thereby increasing the performance of the overall structure.

[0033] Preferably, a semicircular gravity block 13 is fixedly mounted on the inner wall of the bottom end of the valve plate 7 .

[0034] During specific use, the semicircular gravity block 13 can accelerate the closing of the valve plate 7 to the drainage hole 6 when the water pressure force on the valve plate 7 is small, so that the drainage ring 5 can slide downward to the inside of the lower joint 3 to close the water distribution nozzle 2, thereby reducing the entry of dust when the overall stratified water distributor is not in use.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A downhole water distributor for a stratified water injection well, comprising an inner tube (1), characterized in that: Two water distribution nozzles (2) are provided on the outer side of the bottom end of the inner tube (1), a lower joint (3) is fixedly installed on the bottom end of the inner tube (1), a rubber seat (4) is provided on the top of the lower joint (3), a drainage ring (5) is fixedly installed on the bottom end of the rubber seat (4), a plurality of drainage holes (6) are provided around the drainage ring (5), and valve plates (7) are rotatably connected to the inner walls of the plurality of drainage holes (6).

2. A downhole water distributor for a stratified water injection well according to claim 1, characterized in that: A limit spring (8) is fixedly installed inside the rubber seat (4), and the inner wall of the rubber seat (4) is slidably connected to the outer side of the inner tube (1).

3. A downhole water distributor for a stratified water injection well according to claim 2, characterized in that: A plurality of extension rods (9) are fixedly mounted on the top of the rubber seat (4), an upper joint (10) is fixedly mounted on the top of the inner tube (1), and the bottom end of the upper joint (10) is fixedly connected to the top end of the extension rod (9).

4. A downhole water distributor for a stratified water injection well according to claim 1, characterized in that: A limiting ring (11) is fixedly mounted on the bottom end of the drainage ring (5), and the outer sides of the limiting ring (11) and the bottom ends of the drainage ring (5) are slidably connected to the inner side wall of the lower joint (3).

5. The downhole water distributor for a stratified water injection well according to claim 1, characterized in that: A rotating shaft (12) is fixedly mounted on the inner side of the valve plate (7) through an opening, and both ends of the rotating shaft (12) are rotatably connected to the inner side wall of the drainage ring (5).

6. The downhole water distributor for a stratified water injection well according to claim 1, characterized in that: A semicircular gravity block (13) is fixedly mounted on the inner wall of the bottom end of the valve plate (7).

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