Fishing tool
By setting up a water spray port and multiple salvage units in the salvage tool, the coverage area is increased and the structural design is optimized, the problem of small coverage area of existing salvage tools is solved, and the capture effect of bottom-hole debris and the stability of the tool is improved.
Patent Information
- Application Number
- CN202422434254.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-08-06
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The existing salvage tools have a small coverage area and have poor salvage of fine foreign objects such as debris at the bottom of the well.
A salvage tool is designed, including a central tube and several salvage units. One end of the central tube is equipped with a water spray port. The salvage unit is arranged axially and overlaps circumferentially in the central tube. The water spray port is used to pump liquid to drive debris back. The salvage unit increases the coverage area and catches debris. The outer wall is an arc-shaped surface to reduce friction. The connection part can be connected to the oil pipe or drill tool to improve flexibility.
It improves the capture ability and coverage area of the bottom of the well, enhances the adaptability and stability of the salvage tool, reduces the chance of debris falling out, and extends the service life of the central tube.
Smart Images
Figure CN223062408U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of downhole operation tools for oil and gas well development, and particularly relates to a fishing tool. Background Art
[0002] During the construction of oil and gas well drilling engineering, foreign matters such as screws, nuts, and small tools may fall into the bottom of the well, resulting in the inability to continue the oil and gas well drilling engineering, causing serious obstacles to the exploration and development of oil and gas wells. In the prior art, a fishing tool including a single fishing barrel is usually used to fish impurities at the bottom of the well, but the surface area of the fishing tool is small, and the fishing effect on small foreign matters such as debris at the bottom of the well is poor. Summary of the Utility Model
[0003] The purpose of the utility model is to overcome the defect that the coverage area of the fishing tool in the prior art is small and the fishing effect on small foreign matters such as debris at the bottom of the well is poor, and to provide a fishing tool.
[0004] The utility model provides a fishing tool, which includes a central pipe and a plurality of fishing units. A water spraying port is arranged at one end of the central pipe. The plurality of fishing units are arranged along the axial direction of the central pipe. The projections of two adjacent fishing units along the axial direction of the central pipe in the circumferential direction of the central pipe partially overlap. The fishing unit is a hollow cavity with one end open and the other end closed, and the closed end of the fishing unit faces the water spraying port.
[0005] By arranging the water spraying port, liquid can be pumped into the well through the water spraying port. When in use, the end of the fishing tool provided with the water spraying port is placed into the well, and then liquid is pumped into the central pipe. The liquid is sprayed into the well through the water spraying port. The debris at the bottom of the well is driven by the liquid to spray out along the gap between the fishing tool and the well wall. The arrangement of the water spraying port improves the smoothness of the liquid flowing in the well, and further improves the ability of the liquid to drive the debris to return upward along the axial direction of the central pipe from the bottom of the well, improving the fishing effect of the fishing tool on the debris; by arranging a plurality of fishing units and arranging the plurality of fishing units along the axial direction of the central pipe, the coverage area of the fishing tool along the axial direction of the central pipe is increased, improving the fishing effect of the fishing tool; by arranging that the projections of two adjacent fishing units along the axial direction of the central pipe in the circumferential direction of the central pipe partially overlap, the plurality of fishing units can cover a larger area in the circumferential direction of the central pipe. When the liquid drives the debris to return upward along the axial direction of the central pipe from the bottom of the well, the plurality of fishing units can better collect the debris, reducing the probability of the debris falling outside the range of the plurality of fishing units, and improving the capture ability of the fishing tool for the debris.
[0006] The fishing unit can be fixedly arranged on the central pipe or can be detachably arranged on the central pipe.
[0007] The fishing units can be evenly arranged along the circumferential direction of the central pipe.
[0008] The number of the fishing units can be set to 3, 4, 5, etc.
[0009] A plurality of the fishing units are arranged at intervals along the axial direction of the central pipe.
[0010] By arranging a plurality of fishing units at intervals, fishing can be carried out according to different usage scenarios. When pumping liquid into the well, debris of different masses returns to the surface at different heights with the liquid. Lighter debris returns to a higher height, and heavier debris returns to a lower height. By arranging a plurality of fishing units at intervals along the axial direction of the central pipe, debris at different return heights can be fished, improving the adaptability of the fishing tool.
[0011] The intervals of the plurality of fishing units along the axial direction of the central pipe can be set to be equal.
[0012] A plurality of the fishing units are evenly distributed along the circumferential direction of the central pipe.
[0013] By arranging the fishing units evenly along the circumferential direction of the central pipe, the stability of the fishing tool is improved.
[0014] The outer side wall of the fishing unit is set as an arc surface, and the arc surface can contact the well wall.
[0015] By setting the outer side wall of the fishing unit as an arc surface, and the arc surface can contact the well wall. When the fishing unit contacts the well wall, the projection of the fishing unit on the axial direction of the central pipe is an arc, thereby reducing the contact area between the fishing unit and the well wall, reducing the friction between the fishing tool and the well wall, and improving the smoothness of the fishing tool during use.
[0016] Furthermore, the fishing tool can also be set as a cube, a hemisphere, etc.
[0017] The end face of the closed end of the fishing unit is a conical surface.
[0018] By setting the end face of the closed end of the fishing unit as a conical surface, when debris enters the fishing unit, it slides and accumulates through the conical surface under the action of gravity, reducing the probability of splashing out of the fishing unit due to water flow impact.
[0019] The end face of the closed end of the fishing unit can also be a plane, a hemispherical surface, etc.
[0020] The central pipe includes a connecting part, and the connecting part is arranged at one end of the central pipe far from the water spraying port. The connecting part is used for connecting with an oil pipe or a drilling tool.
[0021] By setting up the connecting part to connect the tubing or drill string with the central pipe, the fishing tool can be combined with other components according to actual needs, improving the flexibility of the fishing tool.
[0022] The connecting part can be set as a thread that can cooperate with the tubing, or a reduced thread that can be connected to the drill string.
[0023] The central pipe includes a connecting cap, which is arranged at one end of the central pipe, and the water spray nozzle is arranged on the connecting cap.
[0024] By setting up the connecting cap, when pumping liquid into the well, the connecting cap can block the impact of the fluid on the central pipe, reducing the probability of damage to the central pipe and improving the service life of the central pipe. At the same time, the fluid is blocked by the connecting cap and flows dispersedly, thereby driving the dispersion of the debris. By dispersing the debris, it is not easy for the debris to aggregate into a larger debris block, and thus the debris is easily carried back by the fluid, improving the fishing effect of the fishing tool.
[0025] The connecting cap can be integrally arranged on the central pipe or connected to the central pipe in a detachable manner.
[0026] The connecting cap is a hemispherical cavity, the central pipe is a cylinder, and the diameter of the central pipe is equal to the diameter of the connecting cap.
[0027] By setting the connecting cap as hemispherical, the fluid can be diverted along the outer surface of the hemispherical connecting cap, reducing the impact force of the fluid on the connecting cap, and thus improving the stability of the fishing tool during use.
[0028] The connecting cap can also be set as a triangular pyramid or a cube, etc.
[0029] The central pipe is a steel structure part.
[0030] The central pipe can also be set as a titanium alloy structure part or a plastic structure part, etc.
[0031] The projections of several of the fishing units along the axial direction of the central pipe can surround the central pipe, increasing the area that the fishing units can cover and improving the debris capture ability of the fishing tool.
[0032] Compared with the prior art, the beneficial effects of the present utility model are:
[0033] 1. The present utility model provides a fishing tool. By providing a central tube and a plurality of fishing units, a water spraying port is provided at one end of the central tube, and the plurality of fishing units are arranged along the axial direction of the central tube. The projections of two adjacent fishing units along the axial direction of the central tube in the circumferential direction of the central tube can overlap. The fishing unit is a hollow cavity with one end open and the other end closed, and the closed end of the fishing unit is close to the water spraying port, increasing the coverage area of the plurality of fishing units and improving the fishing effect of the fishing tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 FIG. is a main schematic diagram of the fishing tool provided by the present utility model.
[0035] Figure 2 FIG. is a cross-sectional schematic diagram of the central tube of the fishing tool provided by the present utility model.
[0036] Figure 3 is Figure 1 a cross-sectional schematic diagram of the cross-section at A-A in
[0037] Figure 4 is Figure 1 a cross-sectional schematic diagram of the cross-section at B-B in
[0038] Reference numerals in the drawings:
[0039] 1 - central tube, 11 - connecting part, 12 - connecting cap, 2 - fishing unit, 3 - water spraying port. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0040] The following further describes the present utility model in detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. All technologies implemented based on the content of the present utility model belong to the scope of the present utility model.
[0041] In the description of the specific embodiments of the present utility model, without special explanation, the expression terms of the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the utility model product / device / device is commonly used and placed. These orientation or positional relationship terms are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, and therefore cannot be construed as a limitation to the present utility model.
[0042] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in directions such as "horizontal", "vertical", "hanging", "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present utility model.
[0043] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.
[0044] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation of more than 9.
[0045] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / limited, when terms such as "set", "installed", "connected", "coupled", "provided with", "laid", "arranged" appear, they 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 connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. This kind of connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements.
[0046] Embodiment
[0047] As shown in the Figures 1-4 accompanying drawings, a fishing tool includes a central pipe 1 and five fishing units 2. One end of the central pipe 1 is provided with a water spray port 3. The five fishing units 2 are arranged along the axial direction of the central pipe 1. The projections of two adjacent fishing units 2 along the axial direction of the central pipe 1 overlap partially along the circumferential direction of the central pipe 1. The fishing unit 2 is a hollow cavity with one end open and the other end closed, and the closed end of the fishing unit 2 faces the water spray port 3.
[0048] By setting the water spray nozzle 3, liquid can be pumped into the well through the water spray nozzle 3. During use, the end of the fishing tool with the water spray nozzle 3 is placed into the well, and then liquid is pumped into the central pipe 1. The liquid is sprayed into the well through the water spray nozzle 3, and the debris at the bottom of the well is driven by the liquid and ejected along the gap between the fishing tool and the well wall. The setting of the water spray nozzle 3 improves the smoothness of the liquid flowing in the well, and further improves the ability of the liquid to drive the debris to return upward along the axis of the central pipe 1 from the bottom of the well, improving the effect of the fishing tool in fishing for debris; by setting 5 fishing units 2 and arranging the 5 fishing units 2 along the axial direction of the central pipe 1, the coverage area of the fishing tool along the axial direction of the central pipe 1 is increased, improving the fishing effect of the fishing tool; by setting the projection parts of two adjacent fishing units 2 along the circumferential direction of the central pipe 1 to overlap along the axial direction of the central pipe 1, the 5 fishing units 2 can cover a larger area in the circumferential direction of the central pipe 1. When the liquid drives the debris to return upward along the axis of the central pipe 1 from the bottom of the well, the 5 fishing units 2 can better collect the debris, reducing the probability of the debris falling outside the range of the 5 fishing units 2 and improving the capture ability of the fishing tool for the debris.
[0049] The fishing unit 2 is fixedly arranged on the central pipe 1, and the 5 fishing units 2 are arranged at intervals along the axial direction of the central pipe 1.
[0050] By arranging the 5 fishing units 2 at intervals, fishing can be carried out according to different usage scenarios. When liquid is pumped into the well, debris of different masses and sizes return to different heights with the liquid. The debris with lighter mass returns to a higher height, and the debris with heavier mass returns to a lower height. By arranging the 5 fishing units 2 at intervals along the axial direction of the central pipe 1, debris with different upward return heights can be fished, improving the adaptability of the fishing tool.
[0051] The intervals between the 5 fishing units 2 along the axial direction of the central pipe 1 are set to be equal.
[0052] The 5 fishing units 2 are evenly distributed along the circumferential direction of the central pipe 1.
[0053] By arranging the fishing units 2 to be evenly distributed along the circumferential direction of the central pipe 1, the stability of the fishing tool is improved.
[0054] The outer side wall of the fishing unit 2 is set as an arc surface, and the arc surface can contact the well wall.
[0055] By setting the outer side wall of the fishing unit as an arc surface, and the arc surface can contact the well wall. When the fishing unit contacts the well wall, the projection of the fishing unit on the axial direction of the central pipe is an arc, thereby reducing the contact area between the fishing unit 2 and the well wall, reducing the friction between the fishing tool and the well wall, and improving the smoothness of the fishing tool during use.
[0056] The end face of the closed end of the fishing unit 2 is a conical surface.
[0057] By setting the end face of the closed end of the fishing unit 2 as a conical surface, when debris enters the fishing unit 2, it slides and accumulates through the conical surface under the action of gravity, reducing the probability of splashing out from the fishing unit 2 due to the impact of water flow.
[0058] The central pipe 1 includes a connecting portion 11, and the connecting portion 11 is arranged at the other end of the central pipe 1, that is, the connecting portion 11 is arranged at the end far from the water injection port 3, and the connecting portion 11 is used to connect with an oil pipe or a drilling tool.
[0059] By setting the connecting portion 11, the oil pipe or the drilling tool is connected to the central pipe 1, and the fishing tool can be combined with other components according to actual needs, improving the flexibility of use of the fishing tool.
[0060] The connecting portion 11 can be set as a screw thread that can cooperate with an oil pipe, or a reduced thread that can be connected to a drilling tool, etc.
[0061] The central pipe 1 includes a connecting cap 12, the connecting cap 12 is arranged at one end of the central pipe 1, and the water injection port 3 is arranged on the connecting cap 12.
[0062] By setting the connecting cap 12, when pumping liquid into the well, the connecting cap 12 can block the impact of the fluid on the central pipe 1, reducing the probability of damage to the central pipe 1 and improving the service life of the central pipe 1. At the same time, the fluid is blocked by the connecting cap 12 and flows dispersedly, thereby driving the dispersion of the debris. By dispersing the debris, it is not easy for the debris to accumulate to form a relatively large debris block, and thus the debris is easily carried back by the fluid, improving the fishing effect of the fishing tool.
[0063] The connecting cap 12 is connected to the central pipe 1 in a detachable manner.
[0064] The connecting cap 12 is a hemispherical cavity, the central pipe 1 is a cylinder, and the diameter of the central pipe 1 is equal to the diameter of the connecting cap 12.
[0065] By setting the connecting cap 12 as hemispherical, the fluid can be diverted along the outer surface of the hemispherical connecting cap 12, reducing the impact force of the fluid on the connecting cap 12, and thus improving the stability of the fishing tool during use.
[0066] The central pipe 1 is a steel structure member, and the projections of several fishing units 2 along the axial direction of the central pipe 1 can surround the central pipe 1, increasing the area that the fishing units 2 can cover and improving the debris capture ability of the fishing tool.
[0067] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A fishing tool, characterized in that, It includes a central pipe (1) and several fishing units (2). One end of the central pipe (1) is provided with a water spray opening (3). The several fishing units (2) are arranged along the axial direction of the central pipe (1). The projections of two adjacent fishing units (2) along the circumferential direction of the central pipe (1) on the axial direction of the central pipe (1) partially overlap. The fishing unit (2) is a hollow cavity with one end open and the other end closed, and the closed end of the fishing unit (2) faces the water spray opening (3).
2. The fishing tool according to claim 1, wherein, The several fishing units (2) are arranged at intervals along the axial direction of the central pipe (1).
3. A fishing tool according to claim 1, characterized in that, The several fishing units (2) are evenly distributed along the circumferential direction of the central pipe (1).
4. A fishing tool according to claim 1, characterized in that, The outer side wall of the fishing unit (2) is set as an arc surface, and the arc surface can contact the well wall.
5. A fishing tool according to claim 4, characterized in that, The end face of the closed end of the fishing unit (2) is a conical curved surface.
6. A fishing tool according to any one of claims 1-5, characterized in that, The central pipe (1) includes a connection part (11). The connection part (11) is arranged at the end of the central pipe (1) far from the water spray opening (3), and the connection part (11) is used for connecting with an oil pipe or a drilling tool.
7. A fishing tool according to claim 6, characterized in that, The central pipe (1) includes a connection cap (12). The connection cap (12) is arranged at one end of the central pipe (1), and the water spray opening (3) is arranged on the connection cap (12).
8. A fishing tool according to claim 7, wherein, The connection cap (12) is a hemispherical cavity, the central pipe (1) is a cylinder, and the diameter of the central pipe (1) is equal to the diameter of the connection cap (12).
9. A fishing tool according to claim 6, characterized in that, The central pipe (1) is a steel structure part.
10. A fishing tool according to claim 6, characterized in that, The projections of the several fishing units (2) along the axial direction of the central pipe (1) can surround the central pipe (1).