Coiled tubing downhole tool capable of preventing downhole tool from falling off
By installing a semi-cylindrical shell and a lateral tooth pattern at the buckle connection of the continuous oil pipe downhole tool, the problem of downhole tool falling off is solved, the operation efficiency is improved and the complexity is reduced, and simple and economical Assembly.
Patent Information
- Application Number
- CN202420762466.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-12
AI Technical Summary
The continuous oil pipe downhole tools may fall off unexpectedly during operation, resulting in complex and time-consuming salvage operations required after falling, reducing operation efficiency.
Two hollow semi-cylindrical shells are installed at the buckle connection or easily broken places of the continuous oil pipe downhole tool to form a clamping structure, and horizontal tooth marks are provided on the inner wall to prevent falling off, and simple assembly is achieved through pin connection.
Effectively prevent downhole tools from falling off accidentally during operation, reduce the complexity of the operation, improve the operation efficiency, and be simple to assemble and low cost.
Smart Images
Figure CN222184688U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of continuous tubing downhole tools, in particular to a continuous tubing downhole tool which can prevent the downhole tool from falling off. Background Art
[0002] Coiled tubing tools have been used in construction sites since the birth of coiled tubing operation equipment in the 1960s. Currently, almost all coiled tubing construction processes cannot be separated from the matching downhole tools. Coiled tubing tools can be broadly divided into two categories: tools used on the ground and tools used underground. When the coiled tubing is used underground, the tools installed at the free end of the coiled tubing and lowered into the underground for construction are called coiled tubing downhole tools.
[0003] The connection of the coiled tubing downhole tool may accidentally fall off and fall into the well during the operation. The fish that fall into the well need to be subsequently salvaged, which is time-consuming and has a low success rate, greatly increasing the complexity of the operation and reducing the operation efficiency.
[0004] Therefore, a continuous tubing downhole tool for preventing downhole tools from falling off is proposed, which can prevent downhole tools from accidentally falling off and falling into the well during operation, avoid adding unnecessary additional operations, reduce operation complexity, and improve operation efficiency. Utility Model Content
[0005] The utility model aims to overcome the deficiencies of the prior art and provide a continuous tubing downhole tool for preventing the downhole tool from falling off. Two semi-cylindrical shells are installed at the buckle-type connection or the easily broken part of the continuous tubing downhole tool, which can effectively prevent the downhole tool from accidentally falling off and falling into the well during operation, reduce the complexity of operation, and improve operation efficiency.
[0006] The purpose of this utility model is achieved through the following technical solutions:
[0007] A continuous tubing downhole tool for preventing a downhole tool from falling off is used to reinforce a buckle-type connection or a breakable portion of the continuous tubing downhole tool, and comprises two hollow semi-cylindrical shells; the two semi-cylindrical shells can be butted and fixed to form a cylindrical shell, and after installation, the cylindrical shell is clamped at the buckle-type connection or the breakable portion of the continuous tubing downhole tool.
[0008] The buckle-type connection of the coiled tubing downhole tool is prone to fall off during downhole operations, which complicates the downhole operations. This solution can install an anti-falling downhole tool at this location to reduce the complexity of the operation and improve the operation efficiency.
[0009] In a preferred embodiment of the present invention, the inner wall of the semi-cylindrical shell is provided with transverse threads; after installation, the transverse threads bite into the surface of the coiled tubing downhole tool to prevent the connection tool at the bottom of the coiled tubing downhole tool from falling into the well bottom due to the buckle falling off or breaking. The threads bite into the surface of the connection tool, which can effectively prevent the connection tool from falling into the well bottom due to the buckle falling off.
[0010] In a preferred embodiment of the present invention, the two semi-cylindrical shells are connected via pins. After the continuous tubing downhole tool is connected, the anti-dropping downhole tool can be directly put on the connection without cutting, and the assembly is simple.
[0011] In a preferred embodiment of the present scheme, three through holes are respectively provided on both sides of the semi-cylindrical shell, and the through holes are arranged perpendicular to the length direction of the semi-cylindrical shell; the two semi-cylindrical shells can be connected through the through holes and via pins.
[0012] In a preferred embodiment of the present solution, the cross section of the transverse tooth pattern is an equilateral triangle.
[0013] In a preferred embodiment of the present solution, both end faces of the semi-cylindrical shell are inclined surfaces inclined toward both ends, and the side of the inclined surface close to the coiled tubing downhole tool is higher than the side away from the coiled tubing downhole tool.
[0014] In a preferred embodiment of the present solution, the transverse tooth pattern is interrupted in the middle so that a longitudinal gap area is formed on the inner wall of the semi-cylindrical shell.
[0015] When the tool of this solution is used, an anti-dropping downhole tool of corresponding size can be selected according to the size of the downhole tool.
[0016] The beneficial effects of the utility model are:
[0017] (1) This solution is to form an anti-dropout downhole tool by clamping two semi-cylindrical shells on the coiled tubing downhole tool, and there are teeth in the anti-dropout downhole tool, which bite on the surface of the buckle connection or the surface of the easily broken part of the coiled tubing downhole tool to prevent the connection tool from falling to the bottom of the well due to the buckle falling off, thereby reducing the complexity of the operation and improving the operation efficiency;
[0018] (2) The anti-dropout downhole tool of this solution is to directly put the anti-dropout downhole tool on the tool connection part or the easily broken part after the downhole tool is connected. It does not require cutting, is simple to assemble, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0020] Figure 2This is a schematic diagram of an anti-dropping downhole tool according to Embodiment 1 of the utility model;
[0021] Figure 3 It is a schematic diagram of the front view and left view of the semi-cylindrical shell of the utility model;
[0022] Figure 4 It is a schematic diagram of the use state of the utility model;
[0023] Figure 5 It is a structural schematic diagram of embodiment 2 of the present utility model.
[0024] Among them: 1. Semi-cylindrical shell; 2. Horizontal teeth; 3. Continuous tubing downhole tool; 4. Through hole; 5. Longitudinal gap area. DETAILED DESCRIPTION
[0025] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.
[0026] Example 1
[0027] refer to Figure 4 As shown, a coiled tubing downhole tool for preventing the downhole tool from falling off is installed at the buckle-type connection or the easily broken part of the coiled tubing downhole tool 3. Figures 1 to 3 As shown, the anti-dropout downhole tool comprises two hollow semi-cylindrical shells 1, which can be butted and fixed to form a cylindrical shell, and the clamp is at the buckle-type connection or the easily breakable part of the continuous oil pipe downhole tool 3.
[0028] At the same time, in this embodiment, the inner wall of the semi-cylindrical shell 1 is provided with a transverse tooth pattern 2; after installation, the transverse tooth pattern 2 is engaged with the surface of the coiled tubing downhole tool 3, which can effectively prevent the connecting tool at the bottom of the coiled tubing downhole tool 3 from falling into the bottom of the well due to the buckle falling off or breaking.
[0029] Furthermore, in the present solution, the two semi-cylindrical shells 1 are connected via a pin, and the design of the pin connection enables an anti-dropping downhole tool to be directly put on the connection after the continuous tubing downhole tool is connected.
[0030] Optional, reference Figure 1 , Figure 3 As shown, in this embodiment, three through holes 4 for pin connection are respectively provided on both sides of the semi-cylindrical shell 1, and the through holes 4 are arranged perpendicular to the length direction of the semi-cylindrical shell 1.
[0031] In this embodiment, the cross section of the transverse tooth pattern 2 is an equilateral triangle, and the three through holes 4 for pin connection are evenly distributed in the length direction of the semi-cylindrical shell, so that the semi-cylindrical shell 1 does not need to be divided into forward and reverse directions during assembly.
[0032] refer to Figures 1 to 4 As shown, both end faces of the semi-cylindrical shell 1 are inclined surfaces inclined toward both ends, and the side of the inclined surface close to the coiled tubing downhole tool 3 is higher than the side away from the coiled tubing downhole tool 3, that is, chamfers are added to both ends of the downhole tool to avoid forming steps, which is beneficial to reducing the resistance of the end face of the semi-cylindrical shell 1 during movement.
[0033] Example 2
[0034] refer to Figure 5 As shown, the difference between this embodiment and embodiment 1 is that the transverse thread 2 is interrupted in the middle so that a longitudinal gap area 5 is formed on the inner wall of the semi-cylindrical shell 1. The transverse thread 2 can be engaged only on a part of the surface of the coiled tubing downhole tool 3, and will not be engaged on the entire outer peripheral wall of the coiled tubing downhole tool 3. The advantage of such a design is that it can help prevent the semi-cylindrical shell 1 from rotating in the circumferential direction.
[0035] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A coiled tubing downhole tool for preventing a downhole tool from falling off, used for reinforcing a buckle-type connection or a breakable part of a coiled tubing downhole tool (3), characterized in that: It comprises two hollow semi-cylindrical shells (1); The two semi-cylindrical shells (1) can be butted and fixed to form a cylindrical shell. After installation, the cylindrical shell is clamped at the buckle-type connection or the easily breakable part of the continuous oil pipe downhole tool (3).
2. A coiled tubing downhole tool for preventing a downhole tool from falling off according to claim 1, characterized in that: The inner wall of the semi-cylindrical shell (1) is provided with transverse tooth patterns (2); After installation, the transverse teeth (2) are engaged with the surface of the continuous tubing downhole tool (3) to prevent the connecting tool at the bottom of the continuous tubing downhole tool (3) from falling into the bottom of the well due to the buckle falling off or breaking.
3. A coiled tubing downhole tool for preventing a downhole tool from falling off according to claim 2, characterized in that: The two semi-cylindrical shells (1) are connected via pins.
4. A coiled tubing downhole tool for preventing a downhole tool from falling off according to claim 3, characterized in that: Three through holes (4) are respectively provided on both sides of the semi-cylindrical shell (1), and the through holes (4) are arranged perpendicular to the length direction of the semi-cylindrical shell (1); The two semi-cylindrical shells (1) can be connected via a through hole (4) and a pin.
5. The coiled tubing downhole tool for preventing the downhole tool from falling off according to claim 2, characterized in that: The transverse tooth pattern (2) has a cross section in the form of an equilateral triangle.
6. The coiled tubing downhole tool for preventing the downhole tool from falling off according to claim 5, characterized in that: Both end faces of the semi-cylindrical shell (1) are inclined surfaces inclined towards both ends, and the side of the inclined surface close to the continuous tubing downhole tool (3) is higher than the side away from the continuous tubing downhole tool (3).
7. The coiled tubing downhole tool for preventing the downhole tool from falling off according to claim 5, characterized in that: The transverse tooth pattern (2) is interrupted in the middle so that a longitudinal gap area (5) is formed on the inner wall of the semi-cylindrical shell (1).