Well casing capable of being pulled out and in-well fishing device
By designing a removable drainage well pipe and an in-well salvage device, and using a pulling device and a grab head with a counterweight block, the problems of well pipe breakage and difficulty in removing dropped objects were solved, and the complete removal of the well pipe and the restoration of the drainage well were achieved.
Patent Information
- Application Number
- CN202423116835.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In the existing technology, the well pipe of the precipitation well is easily broken or torn during the removal process, and the underground space is limited, making it difficult to use large equipment, and the small well diameter makes it difficult to salvage fallen objects, resulting in the inability to completely remove the well pipe and clear obstacles in the well.
A removable well pipe and in-well salvage device are designed, including a pulling device and a counterweight block. An openable and closable grabbing head is provided at the bottom of the counterweight block, which is lowered to the bottom of the well pipe through the pulling device. The grabbing head is expanded to press against the inner wall of the well pipe or closed to pick up objects, thereby achieving complete removal of the well pipe and removal of dropped objects.
The well pipe can be completely removed at one time, underground obstacles can be reduced, the precipitation capacity of the precipitation well can be restored, the well pipe can be recycled, and fallen objects in the well can be cleared.
Smart Images
Figure CN223387275U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dewatering projects, in particular to a removable dewatering well pipe and a fishing device in the well. Background Art
[0002] Currently, there's no established extraction process for dewatering wells. Because the well pipes are typically thin, pulling directly from above can easily cause them to tear or break. Once the pipe tears or breaks, not only is it impossible to fully extract it, but the area below the break is also below ground, making further extraction impossible. Furthermore, due to height restrictions in basements or site construction conditions, limited operating space makes it difficult to access large equipment. Fallen debris, pumps, drill bits, and other debris are difficult to salvage due to the typically small diameter of the well. Utility Model Content
[0003] (1) Technical problems solved
[0004] In response to the deficiencies in the prior art, the utility model provides a removable precipitation well pipe and a well salvage device, which has the advantages of completely removing the constructed precipitation well pipe in one go, reducing underground obstacles, recycling the well pipe, clearing fallen objects in the well, and restoring the precipitation capacity of the precipitation well. It solves the problems that the precipitation well pipe is prone to breakage and tearing when being pulled out and cannot be completely removed, and the problem that the operating space is limited due to the height limit of the basement or the restrictions of the site construction conditions, making it difficult to move large equipment, and the problem that fallen objects in the precipitation well are difficult to salvage due to the small diameter of the precipitation well.
[0005] (2) Technical solution
[0006] In order to achieve the above-mentioned purpose of completely removing the constructed precipitation well pipe at one time, reducing underground obstacles, recycling the well pipe and clearing fallen objects in the well, and restoring the precipitation capacity of the precipitation well, the utility model provides the following technical solutions: a removable precipitation well pipe and an in-well salvage device, including a pulling device and a counterweight block, the pulling device is placed at the well pipe mouth, and an openable and closable grabbing head is provided at the bottom of the counterweight block. The counterweight block is lowered to the bottom of the well pipe under the action of the pulling device, and the grabbing head can be expanded to press against the inner wall of the well pipe and closed to pick up fallen objects under further pulling of the pulling device.
[0007] Preferably, the bottom of the counterweight block is cylindrical, and its diameter is smaller than the inner diameter of the well pipe. The top of the counterweight block is a variable diameter area, and the counterweight block and the variable diameter area are hollow as a whole.
[0008] Preferably, the grab head includes two grab hinges, and the grab hinges are arranged opposite to each other at the bottom of the counterweight block through a rotating shaft.
[0009] Preferably, friction teeth are provided on the outer edge of the grip hinge.
[0010] Preferably, the end of the grab hinge close to the inner wall of the well pipe is connected to a first steel wire rope, and the end of the grab hinge away from the inner wall of the well pipe is connected to a second steel wire rope. The first steel wire rope passes through the outside of the counterweight block and is connected to the lifting device, and the second steel wire rope passes through the middle of the counterweight block and is connected to the lifting device.
[0011] Preferably, a plurality of vertically arranged fixing members are provided on the diameter-changing region, a portion of the fixing members is located inside the diameter-changing region, and another portion of the fixing members is located outside the diameter-changing region.
[0012] Preferably, the first steel wire rope is passed through a fixing member located outside the diameter-changing area, and the second steel wire rope is passed through a fixing member inside the diameter-changing area.
[0013] (3) Beneficial effects
[0014] Compared with the prior art, the present invention provides a removable drainage well pipe and a well fishing device, which has the following beneficial effects:
[0015] The removable drainage well pipe and the in-well salvage device are used in conjunction with the lifting equipment, the counterweight and the grabbing head. When it is necessary to remove the drainage well pipe or salvage objects dropped therein. First, the first steel wire rope and the second steel wire rope are connected to the lifting equipment, and the counterweight is gradually lowered to the bottom of the well pipe through the lifting equipment. After the well pipe is lowered into place, if it is necessary to remove the well pipe, the first steel wire rope is tightened upwards by the lifting equipment. The first steel wire rope is gradually pulled upwards, thereby driving the grip hinge at the bottom to expand and expand outwards. The grip hinge will tightly press against the inner wall of the well pipe, and then continue to pull upwards through the lifting equipment, thereby pulling the entire well pipe out from the bottom. There will be no breakage or tearing that makes it impossible to completely remove the well pipe, and the pulled-out well pipe can be reused. If fallen objects need to be salvaged, after the counterweight is lowered to the appropriate position, the fallen object will be located between the two grab hinges. The second wire rope is then pulled upward by the lifting device. Under the pull of the second wire rope, the grab hinges on both sides will close toward the middle. During the closing process, the fallen object is picked up and located between the two grab hinges. The entire counterweight is then lifted upward by the lifting device to fish out the fallen object. This achieves the effect of completely removing the constructed precipitation well pipe in one go, reducing underground obstacles, recycling the well pipe, clearing the fallen objects in the well, and restoring the precipitation well's precipitation capacity. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of a removable drainage well pipe and a fishing device in the well according to the utility model;
[0017] Figure 2This is a top view of a removable drainage well pipe and a well fishing device according to the utility model when they are lowered to the bottom of the well pipe;
[0018] Figure 3 This is an enlarged schematic diagram of the structure of a removable drainage well pipe and a well fishing device in the utility model;
[0019] Figure 4 This is a schematic diagram of a removable dewatering well pipe and a well salvage device in the utility model when being pulled by a pulling device;
[0020] Figure 5 This is a schematic diagram of the structure of a removable dewatering well pipe and a counterweight block of a well fishing device according to the utility model;
[0021] Figure 6 The utility model is a schematic structural diagram of a removable dewatering well pipe and a fixing part of a fishing device in the well.
[0022] Figure: 1, well pipe; 2, lifting equipment; 3, counterweight; 4, grab head; 5, grab hinge; 6, diameter reduction area; 7, fixing piece; 8, first wire rope; 9, second wire rope; 10, rotating shaft; 11, friction gear; DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] See also Figure 1-6 , a removable well pipe 1 for water drainage and a salvage device in the well, including a pulling device 2 and a counterweight 3. The pulling device 2 provides power to lower the device to the bottom of the well and to lift up the device and the well pipe 1 or the salvaged objects. The pulling device 2 is placed at the mouth of the well pipe 1, and serves as the power source of the entire salvage device. It drives the movement of the counterweight 3 and the grab head 4 by controlling the pulling of the wire rope. An openable and closable grab head 4 is provided at the bottom of the counterweight 3. The grab head 4 is used to grab the well pipe 1 and salvage objects dropped in the well. The counterweight 3 is lowered to the bottom of the well pipe 1 under the action of the pulling device 2. The counterweight 3 makes it easier to place the entire device at the bottom of the well pipe 1. The grab head 4 can be expanded to press against the inner wall of the well pipe 1 and closed to pick up dropped objects under further pulling of the pulling device 2.
[0025] The bottom of the counterweight 3 is cylindrical, and its diameter is smaller than the inner diameter of the well pipe 1 to ensure that the counterweight 3 can pass through the well pipe 1 smoothly without getting stuck and reach the designated position. In addition, a certain gap is formed between the counterweight 3 and the inner wall of the well pipe 1, so that the first steel wire rope 8 can pass upward from the outside of the counterweight 3 and be connected to the pulling device 2. Above the counterweight 3 is the variable diameter area 6. The variable diameter area 6 makes the counterweight 3 more flexible in structure and can be easily connected to the steel wire rope and other components required by the pulling device 2. At the same time, the variable diameter area 6 also enhances the overall structural strength of the counterweight 3, making it more durable. The counterweight 3 and the variable diameter area 6 are hollow as a whole. The hollow design allows the second steel wire rope 9 to pass upward from the middle of the counterweight 3 and be connected to the pulling device 2.
[0026] The grab head 4 includes two grab hinges 5, which are arranged opposite to each other at the bottom of the counterweight 3 via a rotating shaft 10. The grab hinge 5 is the grabbing part of the grab head 4, which grabs and fixes objects through opening and closing movements. The rotating shaft 10 is the connection point between the grab hinge 5 and the counterweight 3, which allows the grab hinge 5 to rotate around the axis when needed, thereby adjusting the grab angle and force. When the grab hinge 5 rotates inward, a gripping action is formed to pick up fallen objects. When the grab hinge 5 rotates outward, it can expand and press against the inner wall of the well pipe 1, thereby pulling the well pipe 1 upward from the bottom.
[0027] Friction teeth 11 are provided on the outer edge of the gripper hinge 5. The friction teeth 11 are used to increase the friction between the gripper hinge 5 and the grasped object, ensuring that the pulling device 2 will not be disengaged during the pulling process.
[0028] The end of the grip hinge 5 close to the inner wall of the well pipe 1 is connected to the first steel wire rope 8, and the end of the grip hinge 5 away from the inner wall of the well pipe 1 is connected to the second steel wire rope 9. The first steel wire rope 8 passes through the outside of the counterweight block 3 and is connected to the pulling device 2, and the second steel wire rope 9 passes through the middle of the counterweight block 3 and is connected to the pulling device 2. The two actions of the grip hinge 5 are achieved by pulling the first steel wire rope 8 and the second steel wire rope 9 by the pulling device 2. In the process of pulling out the well pipe 1, the grip hinge 5 needs to expand outward to support the bottom of the well pipe 1, so the first steel wire rope 8 is connected to the end close to the inner wall of the well pipe 1. In the process of pulling the first steel wire rope 8, the grip hinge 5 will be squeezed toward the inner wall of the well pipe 1, thereby getting stuck on the inner wall of the well pipe 1. In the process of picking up fallen objects, the grab hinge 5 needs to be grasped downward, so the second steel wire rope 9 is connected to the end away from the inner wall of the well pipe 1 and passes through the middle of the counterweight block 3. In the process of pulling the second steel wire rope 9, the grab hinges 5 on both sides will be moved closer to the center, thereby salvaging the fallen objects.
[0029] The variable diameter section 6 is provided with several vertically arranged fixings 7, one portion of which is located inside the variable diameter section 6, while the other portion is located outside the variable diameter section 6. A first steel rope 8 is threaded through the fixings 7 located outside the variable diameter section 6, while a second steel rope 9 is threaded through the fixings 7 located inside the variable diameter section 6. The fixings 7 are used to secure the first and second steel ropes 8, 9, providing guidance and preventing tangles. One fixing 7 can be used to secure one first steel rope 8 and one second steel rope 9, located outside and inside the variable diameter section 6, respectively.
[0030] Working principle: When it is necessary to remove the well pipe 1 of the drainage well or salvage objects dropped therein. First, connect the first steel wire rope 8 and the second steel wire rope 9 to the pulling device 2, and gradually lower the counterweight 3 to the bottom of the well pipe 1 through the pulling device 2. After the well pipe 1 is lowered into place, if it is necessary to remove the well pipe 1, the first steel wire rope 8 is tightened upward by the pulling device 2. The first steel wire rope 8 is gradually pulled upward, thereby driving the grip hinge 5 at the bottom to expand and expand outward. The grip hinge 5 will be tightly pressed against the inner wall of the well pipe 1, and then continue to be pulled upward by the pulling device 2, so that the entire well pipe 1 is pulled out from the bottom, and there will be no breakage or tearing that makes it impossible to completely remove the well pipe 1. The pulled out well pipe 1 can be reused. If it is necessary to salvage fallen objects, after lowering the counterweight 3 to the appropriate position, the fallen objects will be located between the two grip hinges 5. Then, the second steel wire rope 9 is pulled upward by the pulling device 2. Under the pulling of the second steel wire rope 9, the grip hinges 5 on both sides will close toward the middle. During the closing process, the fallen objects are picked up and located between the two grip hinges 5. Then, the entire counterweight 3 is lifted upward by the pulling device 2 to salvage the fallen objects. This achieves the effect of completely removing the constructed precipitation well pipe 1 in one go, reducing underground obstacles, recycling the well pipe 1, clearing the fallen objects in the well, and restoring the precipitation capacity of the precipitation well.
[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.
[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A removable drainage well pipe and a well fishing device, characterized by: The invention comprises a pulling device (2) and a counterweight (3), wherein the pulling device (2) is placed at the mouth of a well pipe (1), and an openable and closable grabbing head (4) is provided at the bottom of the counterweight (3). The counterweight (3) is lowered to the bottom of the well pipe (1) under the action of the pulling device (2), and the grabbing head (4) can be expanded to press against the inner wall of the well pipe (1) and closed to pick up dropped objects under further pulling of the pulling device (2).
2. The retractable drainage well pipe and well fishing device according to claim 1, characterized in that: The bottom of the counterweight block (3) is cylindrical, and its diameter is smaller than the inner diameter of the well pipe (1). The top of the counterweight block (3) is a variable diameter area (6), and the counterweight block (3) and the variable diameter area (6) are hollow as a whole.
3. The removable drainage well pipe and well fishing device according to claim 1, characterized in that: The grab head (4) comprises two grab hinges (5), and the grab hinges (5) are arranged opposite to each other at the bottom of the counterweight (3) via a rotating shaft (10).
4. The removable drainage well pipe and the well fishing device according to claim 3 are characterized in that: Friction teeth (11) are provided on the outer edge of the grip hinge (5).
5. The retractable drainage well pipe and the well fishing device according to claim 3 are characterized in that: The end of the grab hinge (5) close to the inner wall of the well pipe (1) is connected to a first steel wire rope (8), and the end of the grab hinge (5) away from the inner wall of the well pipe (1) is connected to a second steel wire rope (9). The first steel wire rope (8) passes through the outside of the counterweight block (3) and is connected to the pulling device (2), and the second steel wire rope (9) passes through the middle of the counterweight block (3) and is connected to the pulling device (2).
6. The retractable drainage well pipe and well fishing device according to claim 2, characterized in that: A plurality of vertically arranged fixing members (7) are provided on the diameter-changing region (6), a portion of the fixing members (7) is located inside the diameter-changing region (6), and another portion of the fixing members (7) is located outside the diameter-changing region (6).
7. The retractable drainage well pipe and well fishing device according to claim 5, characterized in that: The first steel wire rope (8) is passed through a fixing member (7) located outside the diameter-changing area (6), and the second steel wire rope (9) is passed through a fixing member (7) located inside the diameter-changing area (6).