Steering sand blower
By designing and applying the technology of a steering sandblaster, and adopting a two-stage fluid passage structure, the problem of damage to the sandblaster and casing caused by high-speed sand-carrying fluid was solved, achieving efficient use of the tool and low-cost repair.
Patent Information
- Application Number
- CN202410599247.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-11-18
AI Technical Summary
Existing sandblasting equipment suffers damage to its internal structure and casing due to high-speed sand-carrying fluid impacting the internal structure and casing during the fracturing and sand-addition stage, resulting in a low tool recovery and repair rate.
Design a directional sandblasting device with a two-stage liquid flow channel structure, including a sandblasting nozzle, a sliding sleeve, a splash sleeve, and an outer sleeve. The sliding sleeve is controlled to fall and open the sandblasting nozzle by throwing a ball, and the primary and secondary liquid flow channels are used to divert and change the direction of the fluid, thereby reducing damage to the inner sleeve, splash sleeve, and casing.
It effectively reduces the damage to the internal structure and casing of the sandblaster caused by high-speed sand-carrying fluid, improves the tool's service life and repair rate, and reduces operating costs.
Smart Images
Figure CN120968529A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of oilfield downhole fracturing sandblasting tools, and particularly relates to a steering sandblaster. BACKGROUND
[0002] At present, the sandblaster structures used in common large-scale fracturing processes are basically the same in principle, mainly rely on 2 or 3 liquid passing holes designed on the side wall of the body to generate a throttling pressure difference to enable the packer to be set, and a hard alloy bushing is generally installed in the body to improve the sand passing capacity under a high discharge capacity. In the prior art, the inner sleeve and the splash-proof sleeve of the internal structure of the sandblaster are damaged by the high-speed sand-carrying fluid during the fracturing sand adding stage, and the fluid sprayed outward will directly impact the inner wall of the casing, causing damage to the inner wall of the casing, and thus causing damage to the sandblaster and the casing and low tool recovery and repair rate.
[0003] Therefore, in view of the above problems, a steering sandblaster is provided. SUMMARY
[0004] (I) Technical problems to be solved In view of the problems of the prior art, the present application provides a steering sandblaster, which solves the problems that the inner sleeve and the splash-proof sleeve of the internal structure of the sandblaster are damaged by the high-speed sand-carrying fluid during the fracturing sand adding stage, and the fluid sprayed outward will directly impact the inner wall of the casing, causing damage to the inner wall of the casing, and thus causing damage to the sandblaster and the casing and low tool recovery and repair rate.
[0005] (II) Technical solutions To solve the above problems, the present application provides a steering sandblaster, comprising: a body, the surface of the body is provided with a plurality of sandblasting openings arranged in a circumferential direction, the sandblasting openings are first liquid passing channels; a sliding sleeve is arranged in the body, the position of the sliding sleeve corresponds to the sandblasting openings, the position of the sliding sleeve is fixed, and the sliding sleeve falls in the body by means of ball throwing; a splash-proof sleeve is arranged on the body, the position of the splash-proof sleeve corresponds to the position of the sandblasting openings, the inner diameter of the corresponding part of the splash-proof sleeve and the sandblasting openings is greater than that of the inner sleeve, an annular gap with an open top end is formed between the splash-proof sleeve and the inner sleeve, and the annular gap is a second liquid passing channel; an outer sleeve is arranged outside the splash-proof sleeve, and the outer sleeve is connected with the body and the inner wall shape thereof cooperates with the outer wall of the splash-proof sleeve.
[0006] Preferably, the splash-proof sleeve is fixedly connected with the body through an anti-rotation pin, and the outer sleeve is fixedly connected with the body through an anti-rotation pin.
[0007] Preferably, the material of the inner sleeve and the splash-proof sleeve is hard alloy.
[0008] Preferably, the upper and lower sides of the inner sleeve are respectively provided with upper and lower rubber pads, the upper rubber pad is located between the top end of the inner sleeve and the body, and the lower rubber pad is located between the bottom end of the inner sleeve and the outer sleeve.
[0009] Preferably, the sliding sleeve is fixed to the body through a shear pin.
[0010] Preferably, the shear pin passes through the body radially from the outer wall of the body to fix the position of the sliding sleeve.
[0011] Preferably, a plurality of sealing rings are arranged between the upper and lower ends of the sliding sleeve and the body.
[0012] (Three) beneficial effects The steering sand blaster provided by the application forms two-stage liquid passing channels through the cooperation of the body and the splash-proof sleeve, the high-speed sand-carrying fluid is divided and depressurized by the first-stage liquid passing channel when passing through the first-stage and second-stage liquid passing channels, thereby reducing the damage of the high-speed sand-carrying fluid to the inner sleeve and the splash-proof sleeve during fracturing construction; the second-stage liquid passing channel can change the flow direction of the high-speed sand-carrying fluid when it impacts the inner wall of the casing, thereby reducing the damage to the inner wall of the casing. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic view of the steering sand blaster.
[0014] 1, the body; 2, the upper rubber pad; 3, the inner sleeve; 4, the sealing ring; 5, the sliding sleeve; 6, the splash-proof sleeve; 7, the outer sleeve; 8, the anti-rotation pin; 9, the lower rubber pad; 10, the anti-rotation pin; 11, the shear pin. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.
[0016] In the description of the application, it is necessary to understand that the directions or positional relationships indicated by "up", "down", "inner", "outer", "top" and "bottom" are all based on the directions or positional relationships shown in the drawings, and the purpose is only to facilitate the description of the application and simplify the description, and it is not intended to indicate or imply that the indicated parts must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as a limitation on the application.
[0017] As Figure 1As shown, the present application provides a steering sandblaster, specifically comprising: a body 1 as the main body of the device, which needs to be installed on the tool string in the well during work, and the upper and lower ends of the body 1 are generally provided with upper and lower joints for connecting with other tools on the tool string. The body 1 is tubular, and the surface of the body 1 is provided with a plurality of circumferentially arranged sandblasting ports, which are one-stage liquid passages. Generally, the number of sandblasting ports is two, which can be adjusted according to the working environment of the specific site in actual work. When fracturing is carried out, the high-speed sand-carrying fluid flows out of the sandblasting port of the main body 1, thereby reducing and dividing the speed of the high-speed sand-carrying fluid in the main body 1, reducing the impact of the sand-carrying high-speed fluid in the main body 1 on other components in the main body 1, reducing the damage to other components in the main body 1, and improving the service life of the device.
[0018] Among them, the body 1 is provided with a sliding sleeve 5, the position of the sliding sleeve 5 corresponds to the sandblasting port, the position of the sliding sleeve 5 is fixed, and the sliding sleeve 5 seals the sandblasting port from the inside in general. At the beginning of the work, the sandblasting port is blocked, and at this time the sand-carrying high-speed fluid flows downward from the inside of the body 1; after the body 1 is lowered to the working position with the tool string, the sliding sleeve 5 is controlled to move downward to open the sandblasting port, and the sandblasting work can be carried out. The sliding sleeve 5 falls in the body by the way of throwing a ball, and the ball with a diameter matched with the sliding sleeve 5 is thrown into the tool string to block the sliding sleeve 5 and make the fluid in the space above the sliding sleeve 5 pressurized to push the sliding sleeve 5 to move downward. In order to improve the success rate of the sliding sleeve 5 falling, a slope matched with the ball is generally arranged at the top of the sliding sleeve 5 to improve the sealing performance when the ball is thrown and improve the success rate of the ball throwing.
[0019] It should be noted that the sliding sleeve 5 is connected with the body 1 through a shear pin 11, after the sliding sleeve 5 is sealed by throwing a ball, the shear stress borne by the shear pin 11 gradually increases, and when the shear stress is greater than the stress limit that the shear pin 11 can bear, the shear pin 11 breaks, at which time the sliding sleeve 5 can move downward. The shear pin 11 penetrates the body 1 radially from the outer wall of the body 1 to fix the position of the sliding sleeve 5. In the prior art, the shear pin 11 is usually installed on the inside of the body 1. In the present application, the shear pin 11 is fixed to the sliding sleeve 5 by penetrating the body 1 from the outside of the body 1. When the tool is recovered after the downhole work is completed, the shear pin 1 can be replaced after the sliding sleeve is reloaded from the lower end to complete the tool repair, reduce the workload of the resetting work after the tool is recovered, and improve the tool reuse rate. Generally, a plurality of sealing rings 4 are arranged between the upper and lower ends of the inner sleeve 3 and the inner wall of the body 1 to improve the sealing performance of the device.
[0020] In the present application, the body 1 is provided with an inner sleeve 3, a sandblasting channel corresponding to the shape and position of the sandblasting port, the inner diameter of the anti-splashing sleeve 6 is larger than that of the inner sleeve 3, and an annular gap is formed between the anti-splashing sleeve 6 and the inner sleeve 3, which is a two-stage liquid passage; when the sliding sleeve 5 descends, the sandblasting port is opened, the high-speed sand-carrying liquid first passes through the first-stage liquid passage for shunting, pressure reduction and speed reduction, and the fluid flowing out of the sandblasting port flows into the second-stage liquid passage, at this time, under the action of the second-stage liquid passage, the flow direction of the sand-carrying fluid is changed before the sand-carrying fluid directly impacts the inner wall of the casing, thereby improving the economy of the tool while avoiding the direct action of the high-speed sand-carrying fluid on the inner wall of the casing, thereby reducing the damage to the inner wall of the casing. The outer sleeve 7 is provided outside the anti-splashing sleeve 6, and the outer sleeve 7 is connected with the body 1 and the inner wall shape cooperates with the outer wall of the anti-splashing sleeve 6. After the outer sleeve 7 is installed and connected with the main body 1, the outer sleeve 6 can be wrapped, preventing the casing from damaging the anti-splashing sleeve 6 when the tool encounters resistance during the running-in process.
[0021] Wherein, the anti-splashing sleeve 6 is fixedly connected with the body 1 through the anti-rotation pin 8, and the outer sleeve 7 is fixedly connected with the body 1 through the anti-rotation pin 10. Generally, the anti-splashing sleeve 6 and the outer sleeve 7 are connected with the body 1 through threads, and the anti-rotation pin 8 and the anti-rotation pin 10 further fix the anti-splashing sleeve 6 and the inner sleeve 3 and the outer sleeve 7, preventing the anti-splashing sleeve 6 and the outer sleeve 7 from rotating and separating from the body 1 during the downhole operation.
[0022] It should be noted that the inner sleeve 3 is sleeved outside the body 1 to replace the body 1 to be eroded by external fluid, and the inner sleeve 3 and the anti-splashing sleeve 6 are main wear parts during operation. Generally, the material of the anti-splashing sleeve 6 and the inner sleeve 3 is hard alloy, which can greatly prolong the service life of the device and improve the maximum sandblasting capacity of the tool. Considering economy and strength, the type of the hard alloy material is YG8, and the Rockwell hardness is not less than 92, which has very strong wear resistance.
[0023] In addition, in order to further improve the sealing performance and service life of the device, the inner sleeve 3 is respectively provided with an upper rubber pad 2 and a lower rubber pad 9 at the upper and lower positions, the upper rubber pad 2 is located between the top end of the inner sleeve 3 and the body 1, and the lower rubber pad 9 is located between the bottom end of the inner sleeve 3 and the outer sleeve 7. The upper rubber pad and the lower rubber pad 9 further seal the space between the upper and lower ends of the inner sleeve 3 and the body 1 and the outer sleeve 7, preventing fluid from passing through the gap and affecting the sealing performance of the tool. At the same time, the upper rubber pad 2 and the lower rubber pad 9 play a buffering role, reducing the vibration amplitude between the inner sleeve 3, the anti-splashing sleeve 6 and the body 1 and the outer sleeve 7, preventing the inner sleeve 3 and the anti-splashing sleeve 6 from being damaged during operation, improving the integrity of the tool, thereby improving the repair success rate of the device after the operation is completed, and saving the working cost.
[0024] The sand jetting device can reduce the damage of high-speed sand-carrying fluid to the inner sleeve and the splash-proof sleeve and the damage to the inner wall of the casing during fracturing operation. Step one, after installing the tool at a suitable position on the pipe string, the pipe string is lowered into the working position in the well. During the fracturing operation, the sand-carrying high-speed fluid flows downward from the body.
[0025] Step two, after reaching the working position, the ball control sliding sleeve is lowered into the tool string to open the sand jetting port. At this time, the ball falls downward along the tool string to the top of the sliding sleeve to block the sliding sleeve, the fluid above the sliding sleeve is pressurized, when the shear force on the shear pin is greater than its own stress limit, the shear pin is broken, the sliding sleeve is lowered to open the sand jetting port, at this time, the sand-carrying high-speed fluid flows out of the sand jetting port.
[0026] Step three, the sand-carrying high-speed fluid flows out through the first and second liquid passage. In this process, the sand-carrying high-pressure liquid first flows through the first liquid passage for shunting, pressure reduction and speed reduction, the fluid flowing out of the sand jetting port flows into the second liquid passage, at this time, it flows upward under the action of the second liquid passage, the second liquid passage changes the flow direction of the sand-carrying fluid before the sand-carrying fluid directly impacts the inner wall of the casing outside, thereby improving the economy of the tool while avoiding the direct action of the high-speed sand-carrying fluid on the inner wall of the casing, thereby reducing the damage to the inner wall of the casing.
[0027] Step four, after the work is completed, the tool is recovered with the pipe string, each part is checked and the repairable parts are repaired, the repaired parts can be reused.
[0028] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application should be included in the protection scope of the present application.
Claims
1. A steering sander characterized by, Include: The body (1), the body (1) surface is provided with a plurality of circumferential arrangement of sandblasting port, the sandblasting port is a primary liquid passage; The body (1) is provided with a sliding sleeve (5), the position of the sliding sleeve (5) corresponds to the sandblasting port, the position of the sliding sleeve (5) is fixed, the sliding sleeve (5) is controlled to fall in the body by the way of throwing ball; The body (1) is provided with an inner sleeve (3), the opening position of the inner sleeve (3) corresponds to the position of the sandblasting port, the inner diameter of the back splash sleeve (6) is greater than the inner sleeve (3), the annular gap with the top opening is formed between the back splash sleeve (6) and the inner sleeve (3), the annular gap is a secondary liquid passage; The back splash sleeve (6) is provided with an outer sleeve (7) outside, the outer sleeve (7) is connected with the body (1) and the inner wall shape cooperates with the outer wall of the back splash sleeve (6).
2. The turn-around sander of claim 1, wherein, The back splash sleeve (6) is fixedly connected with the body (1) and the inner sleeve (3) through the anti-rotation pin (8), and the outer sleeve (7) is fixedly connected with the body (1) through the anti-rotation pin (10).
3. The turn-around sander of claim 3, wherein, The material of the inner sleeve (3) and the back splash sleeve (6) is hard alloy.
4. The turn-around sander of claim 1, wherein, The upper and lower sides of the inner sleeve (3) are respectively provided with upper rubber pad (2) and lower rubber pad (9), the upper rubber pad (2) is located between the top end of the inner sleeve (3) and the body (1), and the lower rubber pad (9) is located between the bottom end of the inner sleeve (3) and the back splash sleeve (6) and the outer sleeve (7).
5. The turn-around sander of claim 1 wherein, The sliding sleeve (5) is fixed with the body (1) through the shear pin (11).
6. The turn-around sander of claim 5 wherein, The shear pin (11) passes through the body (1) radially from the outer wall of the body (1) to fix the position of the sliding sleeve (5).
7. The turn-around sander of claim 6 wherein, The upper and lower ends of the sliding sleeve (5) and the body (1) are provided with a plurality of sealing rings (4).