Retractable fishing socket
By designing a retractable salvage barrel and using structures such as spring barrels and tile connection sleeves, the problem of difficult to quickly separate the traditional salvage barrels is solved, and efficient and convenient salvage operations are achieved, reducing the operating burden.
Patent Information
- Application Number
- CN202422014356.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-20
AI Technical Summary
After the traditional salvage tube is fished out of the well-falling pipe column, it is difficult to achieve rapid separation from the pipe column, resulting in operation difficulties and increasing limitations in tool use, affecting oil and gas field exploration operations.
A retractable salvage cylinder is designed, adopting a spring cylinder, a tie rod, a tile connection sleeve and other structures. Through the compression of large and small springs and the design of the tile body, the rapid separation of salvage objects and tools is achieved.
The rapid separation of the salvage tool and the pipe string is achieved, which improves salvage efficiency and convenience, reduces the operating burden, and enhances the use effect of the tool.
Smart Images
Figure CN222879657U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of drilling, and in particular relates to a retractable overshot tube. Background Art
[0002] A salvage tube is a salvage tool that is often used during the exploration and development of oil and gas fields. In some oil and gas field explorations, due to the frequent use of tubing, complex geological conditions on site, and immature technology, the operating tubing may break and fall out of the well. At this time, a salvage tube is needed to salvage the tubing to avoid the scrapping of the oil well.
[0003] When a traditional salvage tube is in use, the salvage tube is inserted into the well, and then one end of the salvage tube is contacted and connected with the pipe string dropped in the well, and then the salvage tube is pulled upward to remove the pipe string to ensure the normal use of the oil well. However, it is found in actual use that some commonly used salvage tools can realize the salvage of the pipe string dropped into the well, but in general, there are many cases where the pipe string dropped into the well is blocked when it is pulled up after being salvaged, and it is very difficult to handle. At this time, it is difficult for the salvage tool to achieve rapid separation from the salvaged object, which leads to limitations in the use of the salvage tool, increases the operating burden of the staff, and makes the removal of the pipe string more difficult, and also has a certain negative impact on gas field exploration operations. Utility Model Content
[0004] The utility model provides a retractable overshot tube, aiming to solve the above-mentioned problems.
[0005] The utility model is achieved as follows: a retractable salvage tube comprises an upper joint and a salvaged object, a spring tube is provided on one side of the upper joint, a large spring is provided on the inner wall of the spring tube, a pull rod is penetrated through the inner wall of the large spring, an intermediate rod is clamped at one end of the pull rod, a small spring is sleeved on the arc surface of the intermediate rod, a center rod is clamped at one end of the intermediate rod, a first hole is provided on the surface of the intermediate rod, a second hole is provided on the surface of the intermediate rod close to the center rod, one end of the spring tube is fixedly connected to a salvage tube body, a slip connecting sleeve is provided on the salvage tube body, a slip body is clamped at one side of the slip connecting sleeve at a position where the inner wall of the salvage tube body is provided, the inner wall of the salvage tube body is slidably inserted with the salvaged object, and the salvaged object is clamped with one end of the slip body.
[0006] In some embodiments, a plurality of evenly distributed strip grooves are provided on the arc surface of the slip body.
[0007] In some embodiments, the inner wall cross-section of one end of the canister body is inclined, the cross-section of one end of the slip body is trapezoidal, and the size of the inner wall of one end of the canister body is compatible with the tip of the slip body.
[0008] In some embodiments, the inner wall of the slip body is provided with a plurality of evenly distributed thread grooves, and the plurality of thread grooves are all located near the tip of the slip body.
[0009] In some embodiments, a screw groove is formed on the arc surface at one end of the intermediate rod, and the screw groove is matched with the inner wall of the salvage column.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] The utility model discloses a retractable overshot tube, which can be more efficient and convenient when using the salvage tool to salvage the pipe column fallen into the well. After the salvage is completed, the tool and the pipe column can be quickly separated, which is convenient for the secondary use of the tool, thereby reducing the operating burden of the staff and improving the use effect and convenience of the salvage tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the slip body and the salvaged object separated in the utility model;
[0013] Figure 2 This is a schematic diagram of the structure of one end of the utility model where the salvaged object enters the slip;
[0014] Figure 3 It is a schematic diagram of the structure in which the salvaged object and the slip body of the utility model are completely connected;
[0015] Figure 4 It is a structural schematic diagram of the utility model when the bailing tube body is in the operation of withdrawing the tube;
[0016] Figure 5 This is a schematic diagram of the structure of the slip body of the utility model;
[0017] In the figure: 1. upper joint; 2. spring tube; 3. large spring; 4. pull rod; 5. middle rod; 6. small spring; 7. cava connecting sleeve; 8. bailing tube body; 9. cava body; 10. center rod; 11. salvaged object; 12. first hole; 13. second hole. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0019] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0020] See also Figure 1-2 The utility model provides a technical solution: a retractable salvage tube, comprising an upper joint 1 and a salvage object 11, a spring tube 2 is arranged on one side of the upper joint 1, a large spring 3 is arranged on the inner wall of the spring tube 2, a pull rod 4 is penetrated through the inner wall of the large spring 3, an intermediate rod 5 is clamped at one end of the pull rod 4, a small spring 6 is sleeved on the arc surface of the intermediate rod 5, a center rod 10 is clamped at one end of the intermediate rod 5, a first hole 12 is opened on the surface of the intermediate rod 5, and a second hole 13 is opened on the surface of the intermediate rod 5 near the center rod 10;
[0021] One end of the spring tube 2 is fixedly connected to a scoop body 8, and a slip connection sleeve 7 is provided on the scoop body 8. One side of the slip connection sleeve 7 is located at a position where the inner wall of the scoop body 8 is provided and a slip body 9 is connected thereto. The inner wall of the scoop body 8 is slidably inserted with a salvaged object 11, and the salvaged object 11 is connected to one end of the slip body 9.
[0022] When using the overshot tool to salvage the pipe column salvage 11 that has fallen into the well, first extend the overshot tool into the well, and in the process rotate and lower the overshot tool. During the lowering process, the inner wall of the overshot barrel 8 outside the overshot will dock with the surface of the salvage 11, so that the salvage 11 is inserted into and contacts one end of the slip body 9. The tool continues to be lowered, the slip will be pushed upward, and the small spring 6 on the middle rod 5 will be compressed, and then the salvage 11 will be inserted into the interior of the slip body 9;
[0023] Then, during the continuous lowering of the overshot tube tool, the salvaged object 11 is completely put into the interior of the slip body 9. Then, during the lifting process, the tool is pressurized, and the high pressure is formed in the pressure difference area of the first hole 12. The second hole 13 is connected to the outside of the tool through the slip body 9. Under the pressure state, the pressure difference will push the large spring 3 to compress, thereby pulling the slip body 9 and the salvaged object 11 upward. After one end of the slip body 9 moves upward, it will separate from the inner wall of the overshot tube body 8, thereby losing support, causing the slip body 9 to open, and then it will separate from the salvage tool and fall down, completing the operation of withdrawing the tube;
[0024] At this time, when using the salvage tool to salvage the pipe that has fallen into the well, it can be more efficient and convenient, and after the salvage is completed, the tool and the pipe can be quickly separated, which is convenient for the secondary use of the tool, thereby reducing the operating burden of the staff and improving the use effect and convenience of the salvage tool.
[0025] Reference Figure 1-5 As shown, the present embodiment discloses that a plurality of evenly distributed strip grooves are provided on the arc surface of the slip body 9. The strip grooves on the slip body 9 enable the slip body 9 to have a certain elasticity when in use, so as to better realize the opening and closing during use, thereby more stably ensuring the stable connection with the salvaged object 11 and the convenient opening for subsequent separation;
[0026] The inner wall cross-section of one end of the bailing tube body 8 is inclined, and the cross-section of one end of the slip body 9 is trapezoidal. The size of the inner wall at one end of the bailing tube body 8 is adapted to the tip of the slip body 9. By adapting the size of the inner wall at one end of the bailing tube body 8 to the tip of the slip body 9, the slip body 9 and the bailing tube body 8 can be more stably supported and separated when the salvaged object 11 is separated from the salvage tool, thereby facilitating the opening of the slip body 9 and further achieving the rapid separation of the salvaged object 11.
[0027] Reference Figure 1-5 As shown, the present embodiment discloses that the inner wall of the slip body 9 is provided with a plurality of evenly distributed thread grooves, and the plurality of thread grooves are all located near the tip of the slip body 9. By setting the thread grooves on the inner wall of the slip body 9, when the inner wall of the slip body 9 contacts the salvaged object 11, the friction force can be further increased, so that the salvage tool and the salvaged object 11 of the pipe string are stably connected, and it is not easy to loosen and detach during the lifting process, resulting in the falling of the salvaged object 11, thereby improving the use effect of the overshot;
[0028] A screw groove is provided on the arc surface at one end of the intermediate rod 5, and the screw groove is adapted to the inner wall of the salvage column. Through the setting of the screw groove at one end of the intermediate rod 5, when the salvage object 11 is inserted into the slip body 9, the intermediate rod 5 will enter the interior of the pipe column, thereby further improving the connection strength between the pipe column and the salvage tool, thereby making the position of the salvage object 11 in the pipe column more stable, and further improving the use effect of the salvage tool.
[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A retractable overshot, comprising an upper joint and a salvaged object, characterized in that: A spring tube is provided at one side of the upper joint, a large spring is provided on the inner wall of the spring tube, a pull rod is penetrated through the inner wall of the large spring, an intermediate rod is clamped at one end of the pull rod, a small spring is sleeved on the arc surface of the intermediate rod, a center rod is clamped at one end of the intermediate rod, a first hole is opened on the surface of the intermediate rod, a second hole is opened on the surface of the intermediate rod close to the center rod, one end of the spring tube is fixedly connected with a scoop barrel body, a cava connecting sleeve is provided on the scoop barrel body, and the cava connecting sleeve is located on the inner wall of the scoop barrel body and is clamped with a cava body.
2. A retractable overshot according to claim 1, characterized in that: A plurality of evenly distributed strip grooves are arranged on the arc surface of the slip body.
3. A retractable overshot according to claim 2, characterized in that: The inner wall section of one end of the canister body is inclined, the cross section of one end of the slip body is trapezoidal, and the size of the inner wall of one end of the canister body is matched with the tip of the slip body.
4. A retractable overshot according to claim 3, characterized in that: The inner wall of the slip body is provided with a plurality of evenly distributed thread grooves, and the plurality of thread grooves are all located near the tip of the slip body.
5. A retractable overshot according to claim 4, characterized in that: A screw groove is provided on the arc surface at one end of the intermediate rod, and the screw groove is matched with the inner wall of the salvage column.
6. A retractable overshot according to claim 5, characterized in that: The inner wall of the bailing tube is slidably inserted with the salvaged object, and the salvaged object is clamped with one end of the slip body.