An oilfield water injection nozzle

Abstract

This utility model belongs to the technical field of downhole water distributors, specifically an oilfield water injection nozzle, including a connecting pipe and a replacement device. The replacement device is located on the surface of the connecting pipe, which has four water holes. An regulator is fixedly connected to the surface of the connecting pipe. The replacement device includes a sleeve that fits over the surface of the connecting pipe. A limit post is fixedly connected to the bottom end of the connecting pipe and inserted into the inner surface of the sleeve. A washer is fitted onto the surface of the limit post. A protective device is provided on the surface of the threaded cap. The protective device includes a soft sleeve that fits over the surface of the threaded cap. Multiple locking blocks are fixedly connected to the inner surface of the soft sleeve and inserted into the inner surface of the threaded cap. A cone is fixedly connected to the bottom end of the soft sleeve. By setting up the entire device, it is convenient to maintain the water holes and also reduces the possibility of external debris entering the connecting pipe.

Description

Technical Field

[0001] This utility model relates to the field of downhole water distributor technology, specifically an oilfield water injection nozzle. Background Technology

[0002] Downhole water distributors are core devices used in oil and gas extraction and groundwater management for stratified control of fluid injection or distribution. Their core function is to precisely control different oil layers or formations by adjusting flow rate and pressure, thereby improving recovery rates or optimizing water resource utilization efficiency.

[0003] Regarding the above and existing related technologies: When layered water injection is required in oil fields, downhole water distributors are used. Water flows out through the nozzle, and then the regulator is lifted to discharge it. Most water distributors have an integrated structure at the bottom, which can easily lead to inconvenient maintenance if the nozzle is damaged or blocked internally. Therefore, an oil field water injection nozzle is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: An oilfield water injection nozzle of this utility model includes a connecting pipe and a replacement device. The replacement device is disposed on the surface of the connecting pipe, which has four water holes. An adjuster is fixedly connected to the surface of the connecting pipe. The replacement device includes a sleeve that fits over the surface of the connecting pipe. A limiting post is fixedly connected to the bottom end of the connecting pipe. The limiting post is inserted into the inner surface of the sleeve. A washer is fitted on the surface of the limiting post. A threaded cap is provided on the surface of the limiting post. The washer is located between the sleeve and the threaded cap. Rotating the threaded cap allows it to rotate on the surface of the limiting post, squeezing the washer. By setting up the sleeve, limiting post, threaded cap, and washer, the water holes can be easily cleaned, reducing the cumbersome maintenance after damage or blockage.

[0006] Preferably, the inner wall of the threaded cap and the surface of the limiting post are threaded together, and the surface of the connecting pipe is provided with a groove. A filter screen is inserted into the inner surface of the groove of the connecting pipe. When the water flows, the water will pass through the filter screen in the groove. The filter screen can reduce the entry of external debris into the connecting pipe.

[0007] Preferably, the inner wall of the filter screen is threaded with two positioning pins. After the filter screen is wound around the inner surface of the slot, the two positioning pins are rotated to the inner wall of the filter screen, and the positioning pins can fix the position of the filter screen.

[0008] Preferably, a sealing ring is fixedly connected to the bottom end of the regulator, and a storage groove is provided on the upper surface of the sleeve. The sealing ring is inserted into the inner surface of the storage groove of the sleeve. By setting the storage groove and the sealing ring, the sealing performance between the regulator and the sleeve can be increased.

[0009] Preferably, the surface of the threaded cap is provided with a protective device, the protective device including a soft sleeve, the soft sleeve being fitted over the surface of the threaded cap, a plurality of locking blocks being fixedly connected to the inner surface of the soft sleeve, the locking blocks being inserted into the inner surface of the threaded cap, and a cone being fixedly connected to the bottom end of the soft sleeve. When the threaded cap moves downward, other objects will come into contact with the cone. By setting the soft sleeve, locking blocks and cone, the threaded cap can be protected to a certain extent.

[0010] Preferably, the surface of the soft sleeve is provided with a placement groove, and the threaded cap is inserted into the inner surface of the placement groove of the soft sleeve. When the soft sleeve moves, the soft sleeve is placed on the surface of the threaded cap through the placement groove. The placement groove makes it easy for the soft sleeve to be placed on the surface of the threaded cap.

[0011] Preferably, the surface of the soft sleeve is fixedly connected to two pull blocks. When it is necessary to remove the soft sleeve, the pull blocks are pulled to stretch the soft sleeve. The soft sleeve can be easily removed by setting the pull blocks.

[0012] The advantages of this utility model are:

[0013] 1. When water injection is required, the filter screen is wrapped around the inner surface of the slot, the positioning pin is rotated to the inner wall of the filter screen, and then the sleeve is pushed to fit onto the surface of the connecting pipe. The sleeve will also fit onto the surface of the limiting post. Then the washer is fitted onto the surface of the limiting post. Then the threaded cap is rotated to fit onto the surface of the limiting post. The threaded cap is pressed against the bottom end of the washer. When water flows out through the water hole, the water will push the regulator and then discharge into the ground. After water injection stops, the sealing ring on the regulator will be inserted into the inner surface of the receiving groove. By setting up the whole device, it is convenient to maintain the water hole and also reduces the situation of external debris entering the connecting pipe.

[0014] 2. After the threaded cap is installed, the soft sleeve is pushed to fit over the surface of the threaded cap. The soft sleeve will fit over the surface of the threaded cap through the placement groove. Then, the locking block on the soft sleeve is inserted into the inner surface of the threaded cap. When the soft sleeve moves, it will drive the cone to move. The cone will come into contact with other objects. When it is necessary to remove the soft sleeve, pull the pull block to unfold the soft sleeve. The locking block is pulled out from the threaded cap and the soft sleeve is removed. By setting up the entire device, the threaded cap can be protected and the contact between the threaded cap and other objects can be reduced. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of a connecting pipe in an oilfield water injection nozzle;

[0017] Figure 2 This is a side view schematic diagram of the sleeve structure in an oilfield water injection nozzle;

[0018] Figure 3 For a type of water injection nozzle in an oil field Figure 2 A schematic diagram of the structure at point A;

[0019] Figure 4 This is a side view of the connecting pipe in an oilfield water injection nozzle.

[0020] Figure 5 For a type of water injection nozzle in an oil field Figure 4 A schematic diagram of the structure at point B.

[0021] In the diagram: 1. Connecting pipe; 2. Water hole; 3. Regulator; 4. Replacement device; 41. Sleeve; 42. Limiting post; 43. Threaded cap; 44. Washer; 45. Slot; 46. Filter screen; 47. Positioning pin; 48. Storage slot; 49. Sealing ring; 5. Protective device; 51. Soft sleeve; 52. Locking block; 53. Cone; 54. Placement slot; 55. Pull block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5As shown, an oilfield water injection nozzle includes a connecting pipe 1 and a replacement device 4. The replacement device 4 is disposed on the surface of the connecting pipe 1. Four water holes 2 are formed on the surface of the connecting pipe 1. An adjuster 3 is fixedly connected to the surface of the connecting pipe 1. The replacement device 4 includes a sleeve 41, which is fitted onto the surface of the connecting pipe 1. A limiting post 42 is fixedly connected to the bottom end of the connecting pipe 1. The limiting post 42 is inserted into the inner surface of the sleeve 41. A washer 44 is fitted onto the surface of the limiting post 42. The surface of the limiting post 42 is provided with a threaded cap 43, and the washer 44 is located between the sleeve 41 and the threaded cap 43. During operation, the sleeve 41 is pushed so that it fits onto the partial structural surface of the limiting post 42 and the connecting pipe 1, and then the washer 44 is fitted onto the surface of the limiting post 42. Then the threaded cap 43 is rotated so that it rotates on the surface of the limiting post 42, and the threaded cap 43 squeezes the washer 44. By setting the sleeve 41, the limiting post 42, the threaded cap 43 and the washer 44, it is convenient to clean the water hole 2 and reduce the cumbersome maintenance after damage or blockage.

[0024] The inner wall of the threaded cap 43 and the surface of the limiting post 42 are threaded together. The surface of the connecting pipe 1 is provided with a groove 45. A filter screen 46 is inserted into the inner surface of the groove 45 of the connecting pipe 1. During operation, water will pass through the filter screen 46 in the groove 45. The filter screen 46 can reduce the entry of external debris into the connecting pipe 1.

[0025] The inner wall of the filter screen 46 is threaded with two positioning pins 47; during operation, the two positioning pins 47 are rotated to the inner wall of the filter screen 46, and the positioning pins 47 can fix the position of the filter screen 46.

[0026] A sealing ring 49 is fixedly connected to the bottom end of the regulator 3, and a storage groove 48 is provided on the upper surface of the sleeve 41. The sealing ring 49 is inserted into the inner surface of the storage groove 48 of the sleeve 41. During operation, the regulator 3 will drive the sealing ring 49 to move, and the sealing ring 49 will be inserted into the inner surface of the storage groove 48. By setting the storage groove 48 and the sealing ring 49, the sealing between the regulator 3 and the sleeve 41 can be increased.

[0027] The surface of the threaded cap 43 is provided with a protective device 5, which includes a soft sleeve 51. The soft sleeve 51 is fitted onto the surface of the threaded cap 43. Multiple locking blocks 52 are fixedly connected to the inner surface of the soft sleeve 51. The locking blocks 52 are inserted into the inner surface of the threaded cap 43. A cone head 53 is fixedly connected to the bottom end of the soft sleeve 51. During operation, the soft sleeve 51 is pushed to fit onto the surface of the threaded cap 43. Then, the soft sleeve 51 is pushed again to move the locking blocks 52. The locking blocks 52 are inserted into the inner surface of the threaded cap 43. When the threaded cap 43 moves down, other objects will come into contact with the cone head 53. By setting the soft sleeve 51, locking blocks 52 and cone head 53, the threaded cap 43 can be protected to a certain extent.

[0028] The surface of the soft sleeve 51 is provided with a placement groove 54, and the threaded cap 43 is inserted into the inner surface of the placement groove 54 of the soft sleeve 51. During operation, the soft sleeve 51 is fitted onto the surface of the threaded cap 43 through the placement groove 54. The placement groove 54 makes it easy for the soft sleeve 51 to be fitted onto the surface of the threaded cap 43.

[0029] Two pull blocks 55 are fixedly connected to the surface of the soft sleeve 51; during operation, the pull blocks 55 are pulled to stretch the soft sleeve 51, and the soft sleeve 51 can be easily removed by setting the pull blocks 55.

[0030] The working principle is as follows: When water injection is required, the filter screen 46 is wrapped around the inner surface of the slot 45, and the positioning pin 47 is rotated to the inner wall of the filter screen 46. Then, the sleeve 41 is pushed to fit onto the surface of the connecting pipe 1, and the sleeve 41 also fits onto the surface of the limiting post 42. Then, the washer 44 is fitted onto the surface of the limiting post 42. Then, the threaded cap 43 is rotated to fit onto the surface of the limiting post 42, and the threaded cap 43 presses against the bottom end of the washer 44. When water flows out through the water hole 2, the water pushes the regulator 3 and then drains into the ground. After water injection stops, the sealing ring 49 on the regulator 3 will be inserted into the inner surface of the receiving groove 48. The entire device allows for convenient maintenance of the water hole 2. This also reduces the chance of external debris entering the connecting pipe 1. After the threaded cap 43 is installed, push the soft sleeve 51 to fit over the surface of the threaded cap 43. The soft sleeve 51 will fit over the surface of the threaded cap 43 through the placement groove 54. Then, insert the locking block 52 on the soft sleeve 51 into the inner surface of the threaded cap 43. When the soft sleeve 51 moves, it will drive the cone 53 to move. The cone 53 will come into contact with other objects. When it is necessary to remove the soft sleeve 51, pull the pull block 55 to unfold the soft sleeve 51. The locking block 52 will be pulled out from the threaded cap 43 and the soft sleeve 51 will be removed. By setting up the entire device, the threaded cap 43 can be protected and the chance of the threaded cap 43 coming into contact with other objects can be reduced.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An oilfield water injection nozzle comprising a connecting pipe (1) and a replacement device (4), characterized in that: The replacement device (4) is disposed on the surface of the connecting pipe (1). The surface of the connecting pipe (1) has four water holes (2). The surface of the connecting pipe (1) is fixedly connected to an regulator (3). The surface of the connecting pipe (1) is provided with a replacement device (4). The replacement device (4) includes a sleeve (41). The sleeve (41) is sleeved on the surface of the connecting pipe (1). The bottom end of the connecting pipe (1) is fixedly connected to a limiting post (42). The limiting post (42) is inserted into the inner surface of the sleeve (41). The surface of the limiting post (42) is fitted with a washer (44). The surface of the limiting post (42) is provided with a threaded cap (43). The washer (44) is located between the sleeve (41) and the threaded cap (43).

2. An oilfield injection water nozzle according to claim 1, characterized in that: The inner wall of the threaded cap (43) is threaded to the surface of the limiting post (42), and the surface of the connecting pipe (1) is provided with a slot (45), and a filter screen (46) is inserted into the inner surface of the slot (45) of the connecting pipe (1).

3. An oilfield injection water nozzle according to claim 2, characterized in that: The inner wall of the filter screen (46) is threaded with two locating pins (47).

4. An oilfield injection water nozzle as defined in claim 1, wherein: The bottom end of the regulator (3) is fixedly connected with a sealing ring (49), and the upper surface of the sleeve (41) is provided with a storage groove (48). The sealing ring (49) is inserted into the inner surface of the storage groove (48) of the sleeve (41).

5. An oilfield injection water nozzle as defined in claim 1, wherein: The surface of the threaded cap (43) is provided with a protective device (5). The protective device (5) includes a soft sleeve (51). The soft sleeve (51) is fitted onto the surface of the threaded cap (43). A plurality of locking blocks (52) are fixedly connected to the inner surface of the soft sleeve (51). The locking blocks (52) are inserted into the inner surface of the threaded cap (43). A cone head (53) is fixedly connected to the bottom end of the soft sleeve (51).

6. An oilfield injection water nozzle according to claim 5, characterized in that: The surface of the soft sleeve (51) is provided with a placement groove (54), and the threaded cap (43) is inserted into the inner surface of the placement groove (54) of the soft sleeve (51).

7. An oilfield injection water nozzle as defined in claim 5, wherein: Two pull blocks (55) are fixedly connected to the surface of the soft sleeve (51).

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