Water injection nozzle for oilfield water injection

Abstract

The utility model discloses a water injection nozzle for oilfield water injection, which is provided with a water injection nozzle body, the top end of the water injection nozzle body is connected with a water injection pipeline, the inside of the water injection pipeline is connected with a stirring shaft, and the outer side of the stirring shaft is uniformly connected with stirring blades; comprising a connecting ring which is arranged on the outer side of a water injection nozzle body and the joint of a water injection pipeline and the water injection nozzle body. According to the utility model, the positioning groove and the positioning block are matched with each other, so that a primary positioning effect can be achieved on the mounting of the connecting ring, the conditions of mounting dislocation and deviation during the mounting of the connecting ring can be prevented, and meanwhile, the connecting ring can be conveniently mounted by rotating the hand wheel and under the dual effects of threaded connection and gear meshing connection. And when the bolt is loosened, the reinforcing limiting block can be driven to clamp the outer side of the bolt so as to further reinforce, limit and fix the bolt, so that the bolt is prevented from loosening, and the connection tightness of the connecting ring is kept.

Description

Technical Field

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

[0002] The measure of injecting water into the oil layer through water injection wells to supplement and maintain the oil layer pressure is called water injection. After the oil field is put into development, as the exploitation time increases, the energy of the oil layer itself will be continuously consumed, causing the oil layer pressure to continue to drop, a large amount of underground crude oil to be degassed, the viscosity to increase, the oil well production to be greatly reduced, and even the spraying and production will stop, resulting in a large amount of dead oil remaining underground that cannot be extracted. In order to make up for the underground deficit caused by the extraction of crude oil, maintain or increase the oil layer pressure, achieve high and stable production of the oil field, and obtain a higher recovery rate, the oil field must be injected with water;

[0003] Chinese patent authorization announcement No. CN211950457U discloses a water injection nozzle for oil field water injection, wherein the bottom end of the inner cavity of the second box body is connected with a rotating shaft through a bearing, and the end of the rotating shaft away from the second box body is inserted into the water injection nozzle, a turbine blade is fixed on the outer side of the rotating shaft, and a first torsion spring is sleeved on the lower part of the rotating shaft, a conduit is connected to one side of the second box body, one end of the conduit is tightly fitted to the outer side of the water injection nozzle, a through groove is opened on one side of the bottom end of the second box body, and a plug is provided in the inner cavity of the through groove. The utility model installs two boxes with different functions on the outer side of the water injection nozzle, when the water pressure is too large, the plug of a specific shape in the inner cavity of the through groove at the bottom end of the second box body moves downward, and the water flow from the water injection nozzle flows out along the through groove, and the change of the water flow drives the turbine blade to rotate, so that the second box body rotates and descends through the threaded portion, and the conduit on one side flows the water out of the inner cavity of the second box body, thereby achieving the effect of reducing pressure.

[0004] The above-mentioned existing technical solution has the following shortcomings: this technical solution achieves the effect of reducing pressure by allowing water to flow out along the through groove, and the change of water flow drives the turbine blades to rotate, but the sealing of this technical solution is relatively simple and prone to leakage. At the same time, the existing water injection nozzle is fixedly connected by bolts, but after long-term use, the bolts will become loose due to the vibration of the machine operation. We need to make further improvements on this. Utility Model Content

[0005] The utility model aims to provide a water injection nozzle for oil field water injection, so as to solve the problem that the bolts at the connection of the water injection nozzle mentioned in the background technology are easy to loosen after long-term use.

[0006] To achieve the above object, the utility model provides the following technical solution: a water injection nozzle for oil field water injection, provided with a water injection nozzle body, the top of the water injection nozzle body is connected to a water injection well, and the inside of the water injection well is connected to a stirring shaft, and the outer side of the stirring shaft is evenly connected with stirring blades;

[0007] include:

[0008] A connecting ring is arranged on the outside of the water injection nozzle body and at the connection between the water injection well and the water injection nozzle body. The connecting ring is evenly connected with a positioning block at one end close to the water injection well. The water injection well is evenly provided with a positioning groove at one end close to the connecting ring. The positioning grooves are all engaged with the positioning blocks. The connecting ring and the water injection well are fixedly connected by bolts.

[0009] A strengthening limit mechanism is arranged inside the connecting ring to prevent the bolts from loosening.

[0010] When using an injection nozzle for oil field water injection using the technical solution, the limit block is strengthened to prevent the bolts from loosening, thereby maintaining the tightness of the positioning block connection. At the same time, through the mutual cooperation of the sealing groove, the sealing block and the sealing ring, the sealing performance of the connection between the injection nozzle body and the water injection wellway can be effectively improved.

[0011] Preferably, the reinforced limiting mechanism includes built-in grooves, which are evenly arranged inside the connecting ring, the inside of the built-in grooves are rotatably connected with forward and reverse screws, and the outer sides of the forward and reverse screws are sleeved with threaded sleeves, the top of the threaded sleeves are fixedly connected with connecting blocks, and one end of the connecting blocks is connected with a reinforced limiting block, the outer sides of the forward and reverse screws are fixedly connected with a second bevel gear, the inside of the built-in grooves are connected with a connecting shaft, and the outer side of the connecting shaft is connected with a first bevel gear, the first bevel gear is meshed with the second bevel gear, the top of the connecting shaft is connected with a handwheel, and the top of the connecting ring is evenly provided with guide grooves.

[0012] Preferably, the inner side of the reinforced limit block is in the same shape as the outer side of the bolt, and the two are in close contact with each other.

[0013] Preferably, the size of the positioning groove is equal to that of the positioning block, and the cross-sections of the positioning groove and the positioning block are both arranged to be trapezoidal.

[0014] Preferably, the bolts are provided in four groups, which are respectively distributed in four directions inside the connecting ring.

[0015] Preferably, a sealing block is connected to the top of the water injection nozzle body, and a sealing groove is provided inside the sealing block, and a sealing ring is connected to one end of the water injection well close to the water injection nozzle body, and the sealing ring is engaged with the sealing groove.

[0016] Preferably, the inner side of the sealing groove fits in shape with the outer side of the sealing ring, and the cross-section of the sealing ring is arranged to be trapezoidal.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the water injection nozzle for oil field water injection not only realizes the function of strengthening the connection, but also realizes the improvement of the sealing performance;

[0018] (1) Through the cooperation between the positioning groove and the positioning block, the installation of the connecting ring can be initially positioned to prevent the connecting ring from being misplaced or offset during installation. At the same time, by turning the hand wheel and under the dual effects of the threaded connection and the gear meshing connection, the reinforcing limit block can be driven to clamp on the outside of the bolt to further strengthen the limit fixation of the bolt to prevent the bolt from loosening and maintain the tightness of the connecting ring during connection;

[0019] (2) Through the cooperation of the sealing groove, the sealing block and the sealing ring, the sealing performance of the connection between the water injection nozzle body and the water injection well can be effectively improved to prevent liquid from leaking from the water injection nozzle body, making it difficult for subsequent oil field water injection work to proceed smoothly and causing inconvenience to the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the top view of the connecting ring structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the front cross-sectional structure of the connecting ring of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the reinforced limit block of the utility model;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing block and sealing ring combination of the utility model.

[0026] Explanation of the reference numerals in the figure: 1. stirring shaft; 2. water injection shaft; 3. positioning groove; 4. sealing block; 5. connecting ring; 6. bolt; 7. positioning block; 8. water injection nozzle body; 9. stirring blade; 10. sealing ring; 11. sealing groove; 12. reinforcing limit block; 13. connecting block; 14. hand wheel; 15. guide groove; 16. built-in groove; 17. forward and reverse thread screw; 18. connecting shaft; 19. first bevel gear; 20. second bevel gear; 21. threaded sleeve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of 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.

[0028] See also Figure 1-Figure 5 , an embodiment provided by the utility model: a water injection nozzle for oil field water injection, provided with a water injection nozzle body 8;

[0029] The top of the water injection nozzle body 8 is connected to a sealing block 4, and a sealing groove 11 is provided inside the sealing block 4. The end of the water injection well 2 close to the water injection nozzle body 8 is connected to a sealing ring 10, and the sealing ring 10 is engaged with the sealing groove 11. The inner side of the sealing groove 11 is in conformity with the outer side of the sealing ring 10, and the cross section of the sealing ring 10 is set to be trapezoidal.

[0030] Specifically, Figure 1 and Figure 5 As shown, when in use, the sealing performance of the connection between the water injection nozzle body 8 and the water injection well 2 can be effectively improved through the cooperation between the sealing groove 11, the sealing block 4 and the sealing ring 10;

[0031] The top of the water injection nozzle body 8 is connected to the water injection well 2, and the inside of the water injection well 2 is connected to the stirring shaft 1, and the outside of the stirring shaft 1 is evenly connected to the stirring blades 9; including: a connecting ring 5, which is arranged on the outside of the water injection nozzle body 8 and at the connection between the water injection well 2 and the water injection nozzle body 8, and the end of the connecting ring 5 close to the water injection well 2 is evenly connected to the positioning block 7, and the end of the water injection well 2 close to the connecting ring 5 is evenly provided with a positioning groove 3;

[0032] The size of the positioning groove 3 is equal to that of the positioning block 7, and the cross-sections of the positioning groove 3 and the positioning block 7 are both set to be trapezoidal;

[0033] Specifically, Figure 1As shown, when in use, the positioning groove 3 and the positioning block 7 cooperate with each other to achieve a preliminary positioning effect on the installation of the connecting ring 5, so as to prevent the connecting ring 5 from being misplaced or offset during installation;

[0034] The positioning grooves 3 are all engaged with the positioning blocks 7, and the connecting ring 5 is fixedly connected to the water injection well 2 by bolts 6;

[0035] There are four groups of bolts 6, which are respectively distributed in four directions inside the connecting ring 5;

[0036] Specifically, Figure 1 and Figure 2 As shown, when in use, the connection between the water injection well 2 and the connecting ring 5 can be fixed by the bolt 6;

[0037] Strengthen the limiting mechanism;

[0038] The strengthening limiting mechanism includes a built-in groove 16, which is evenly arranged inside the connecting ring 5, the inside of the built-in groove 16 is rotatably connected with a positive and negative threaded screw 17, and the outer side of the positive and negative threaded screw 17 is sleeved with a threaded sleeve 21, the top of the threaded sleeve 21 is fixedly connected with a connecting block 13, and one end of the connecting block 13 is connected with a strengthening limiting block 12, the outer side of the positive and negative threaded screw 17 is fixedly connected with a second bevel gear 20, the inside of the built-in groove 16 is connected with a connecting shaft 18, and the outer side of the connecting shaft 18 is connected with a first bevel gear 19, the first bevel gear 19 is meshed with the second bevel gear 20, the top of the connecting shaft 18 is connected with a hand wheel 14, the inner side of the strengthening limiting block 12 is the same shape as the outer side of the bolt 6, and the two fit together, and the top of the connecting ring 5 is evenly provided with a guide groove 15;

[0039] Specifically, Figure 2 , Figure 3 and Figure 4 As shown, when in use, the limiting mechanism is strengthened to prevent the bolt 6 from loosening, thereby maintaining the tightness of the connection of the connecting ring 5;

[0040] It is arranged inside the connecting ring 5 to prevent the bolt 6 from loosening.

[0041] Working principle: When the utility model is in use, the positioning block 7 is inserted into the inside of the positioning groove 3, which plays a preliminary positioning role for the installation of the connecting ring 5, and then fixedly connected by the bolt 6. At this time, the hand wheel 14 is turned, and the hand wheel 14 drives the connecting shaft 18 and the first bevel gear 19 on the outside to rotate. Under the action of the meshing connection, the second bevel gear 20 drives the positive and negative threaded screw 17 on the inside to rotate, and under the action of the threaded connection, the threaded sleeve 21 further drives the connecting block 13 and the reinforced limit block 12 at one end to clamp the two sides of the bolt 6, thereby achieving the effect of strengthening the clamping and fixing, so as to prevent the bolt 6 from loosening after long-term use;

[0042] Then the oilfield water injection workflow begins. During the water injection process, with the cooperation of the sealing groove 11, the sealing block 4 and the sealing ring 10, the sealing performance of the connection between the water injection nozzle body 8 and the water injection well 2 can be effectively improved to prevent liquid from leaking out of the water injection nozzle body 8.

[0043] In the description of the present invention, it should be noted that, 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A water injection nozzle for oil field water injection, comprising a water injection nozzle body (8), the top of the water injection nozzle body (8) being connected to a water injection well (2), the inside of the water injection well (2) being connected to a stirring shaft (1), and the outside of the stirring shaft (1) being evenly connected to stirring blades (9); It is characterized in that include: A connecting ring (5) is arranged on the outside of the water injection nozzle body (8) and at the connection between the water injection well (2) and the water injection nozzle body (8); one end of the connecting ring (5) close to the water injection well (2) is evenly connected to a positioning block (7); one end of the water injection well (2) close to the connecting ring (5) is evenly provided with positioning grooves (3), and the positioning grooves (3) are all engaged and connected with the positioning blocks (7); the connecting ring (5) and the water injection well (2) are fixedly connected by bolts (6); A reinforced limiting mechanism is arranged inside the connecting ring (5) to prevent the bolt (6) from loosening.

2. The water injection nozzle for oil field water injection according to claim 1, characterized in that: The reinforced limiting mechanism comprises built-in grooves (16) which are evenly arranged inside the connecting ring (5); the inside of the built-in grooves (16) are rotatably connected to the positive and negative threaded screws (17); the outer sides of the positive and negative threaded screws (17) are sleeved with threaded sleeves (21); the top ends of the threaded sleeves (21) are fixedly connected to the connecting blocks (13); one end of the connecting blocks (13) is connected to the reinforced limiting blocks (12); the outer sides of the positive and negative threaded screws (17) are fixedly connected to the second bevel gears (20); the inside of the built-in grooves (16) are connected to the connecting shafts (18); the outer sides of the connecting shafts (18) are connected to the first bevel gears (19); the first bevel gears (19) are meshedly connected to the second bevel gears (20); the top ends of the connecting shafts (18) are connected to the hand wheels (14); and the top ends of the connecting rings (5) are evenly provided with guide grooves (15).

3. The water injection nozzle for oil field water injection according to claim 2, characterized in that: The inner side of the reinforcing limit block (12) has the same shape as the outer side of the bolt (6), and the two are fitted together.

4. The water injection nozzle for oil field water injection according to claim 1, characterized in that: The size of the positioning groove (3) is equal to the size of the positioning block (7), and the cross-sections of the positioning groove (3) and the positioning block (7) are both arranged to be trapezoidal.

5. The water injection nozzle for oil field water injection according to claim 1, characterized in that: The bolts (6) are provided in four groups, which are respectively distributed in four directions inside the connecting ring (5).

6. The water injection nozzle for oil field water injection according to claim 1, characterized in that: The top end of the water injection nozzle body (8) is connected to a sealing block (4), and a sealing groove (11) is provided inside the sealing block (4); one end of the water injection well (2) close to the water injection nozzle body (8) is connected to a sealing ring (10), and the sealing ring (10) is engaged with the sealing groove (11).

7. The water injection nozzle for oil field water injection according to claim 6, characterized in that: The inner side of the sealing groove (11) is in conformity with the outer side of the sealing ring (10), and the cross-section of the sealing ring (10) is arranged to be trapezoidal.

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