Guiding and plugging device suitable for scaling well
By designing a guided fishing and plugging device suitable for scaled wells, using a stepped tube structure and mechanical fishing and plugging tools, the problem of difficulty in fishing out the plug when fish falls down the well is solved, achieving efficient and safe fishing operations and reducing costs. Labor hours and costs.
Patent Information
- Application Number
- CN202420332515.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-02-22
AI Technical Summary
When the fish falls from the well is complicated, it is difficult for the existing technology to effectively remove the plug in the pipe column, especially when the pipe column is scaled or sand is severely produced on the production well, which leads to a great increase in the difficulty of salvage operations, which seriously affects the working hours and costs. .
A guide fishing and plugging device suitable for scaling wells is designed, including a guide introduction tool and a mechanical fishing and plugging tool. The guide introduction tool is composed of the introduction tool and the guide tool. It adopts a stepped tube structure and an inclined plane structure, and cooperates with the flushing tool and fishing tool in the mechanical fishing and plugging tool. The stepped tube structure and the limit step centralizing tool improve the tensile strength and flexibility. sex.
It achieves efficient salvage of the plug inside the fish, improves the safety and timeliness of offshore salvage operations, solves problems in offshore salvage operations, and reduces working hours and costs.
Smart Images
Figure CN222376440U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of downhole fishing tools, and more specifically to a guiding fishing and plugging device suitable for scaling wells. Background Art
[0002] When the fish fall situation is complicated, the most common solution is to cut and salvage the fish in sections. However, since there may be a plug in the fish fall string, and in the case of severe scaling of the string or sand production in the production well, the buried plug cannot be fished out by normal wire operation, which results in the cutting tool being unable to reach the predetermined cutting depth, greatly increasing the difficulty of the salvage operation and seriously affecting the working time and cost. Utility Model Content
[0003] The utility model overcomes the shortcomings of the prior art and provides a guiding and plugging device suitable for scaling wells.
[0004] The purpose of the utility model is achieved through the following technical solutions.
[0005] A guide catching and plugging device suitable for scaling wells comprises a guide introduction tool, a mechanical catching and plugging tool is detachably provided in a fish cavity of the guide introduction tool, the guide introduction tool is composed of an introduction tool and a guide tool connected, the introduction tool and the guide tool are a pipe column structure, the introduction tool consists of a connecting pipe body, a first pipe body and a second pipe body, one end of the connecting pipe body is a connecting end, the connecting pipe body is connected to the guide tool through the connecting end, the first pipe body is connected to the free end of the connecting pipe body through a thread, a second pipe body is provided on the outside of the first pipe body, and limiting steps are provided on the free ends of the inner pipes of the first and second pipe bodies.
[0006] The inner tube of the connecting tube body is a stepped tube structure, the diameter of the inner tube of the stepped tube structure gradually decreases from the free end to the connecting end of the connecting tube body, and a limiting step is provided on the connecting part of each stepped tube body.
[0007] The free end of the guide tool is a sloped structure.
[0008] The inner tube of the guide tool is a stepped tube structure, the inner tube diameter of which is gradually reduced from the connecting end to the free end of the guide tool, and a limiting step is provided on the connecting part of each stepped tube body.
[0009] The mechanical catching tool comprises a flushing tool and a salvaging tool. The flushing tool comprises a rod body. A buckle structure is arranged at the rear end of the rod body, a flushing joint is arranged at the head end of the rod body, and a steel wire external catching tool is arranged on the flushing joint.
[0010] The salvage tool comprises an upper joint, a core shaft, an outer cylinder, a shear pin, a cylinder body, a main spring, a salvage claw spring, a spring fixing sleeve, a salvage claw fixing sleeve, a salvage claw and a locking screw. The upper joint is arranged at the end of the core shaft and fixed by the locking screw. The core shaft is nested in the outer cylinder. The core shaft and the outer cylinder are connected by the shear pin. The cylinder body is arranged on the outer cylinder. An annular groove body is formed between the outer cylinder and the core shaft. The main spring is nested outside the core shaft. The spring fixing sleeve is arranged corresponding to the main spring. The salvage claw spring is nested in the spring fixing sleeve. The spring fixing sleeve and the salvage claw spring are arranged in the cylinder body. The salvage claw fixing sleeve is nested in the cylinder body and matches the salvage claw spring. The salvage claw is arranged in the setting groove of the salvage claw fixing sleeve.
[0011] The beneficial effects of the utility model are:
[0012] This solution has the functional characteristics of righting the fallen fish in the well, flushing the fish top and high tensile strength of the tool. It can achieve efficient salvage of the plugger inside the fallen fish, provide favorable conditions for subsequent cutting and salvaging operations, and can effectively salvage the buried plugger inside the fallen fish. It is used to improve the safety and timeliness of offshore operations and solve the problems of offshore salvage operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the guide introduction tool;
[0014] Figure 2 It is a schematic diagram of the structure of the introduction tool;
[0015] Figure 3 It is a schematic diagram of the structure of the guide tool;
[0016] Figure 4 It is a schematic diagram of the structure of the flushing tool;
[0017] Figure 5 It is a schematic diagram of the structure of the salvage tool;
[0018] In the figure: 1. guide introduction tool; 11. introduction tool; 111. connecting pipe body; 112. first pipe body; 113. second pipe body; 12. guide tool; 2. flushing tool; 21. buckle structure; 22. rod body; 23. flushing joint; 24. wire fishing tool; 3. fishing tool; upper joint 31; 32. core shaft; 33. outer cylinder; 34. shear pin; 35. cylinder body; 36. main spring; 37. fishing claw spring; 38. spring fixing sleeve; 39. fishing claw fixing sleeve; 310. fishing claw; 311. locking screw; 4. limiting step. DETAILED DESCRIPTION
[0019] The technical solution of the utility model is further described below through specific embodiments.
[0020] Example
[0021] A guide catching and plugging device suitable for scaling wells comprises a guide introduction tool 1, a fish cavity of the guide introduction tool 1 is detachably provided with a mechanical catching and plugging tool, the guide introduction tool 1 is composed of an introduction tool 11 and a guide tool 12 connected together, the introduction tool 11 and the guide tool 12 are a pipe column structure, the introduction tool 11 is composed of a connecting pipe body 111, a first pipe body 112 and a second pipe body 113, one end of the connecting pipe body 111 is a connecting end, the connecting pipe body 111 is connected to the guide tool 12 via the connecting end, the first pipe body 112 is connected to the free end of the connecting pipe body 111 via a thread, the second pipe body 113 is provided on the outside of the first pipe body 112, and the free ends of the inner pipes of the first pipe body 112 and the second pipe body 113 are provided with limiting steps 4.
[0022] The inner tube of the connecting tube body 111 is a stepped tube structure, and the diameter of the inner tube of the stepped tube structure gradually decreases from the free end to the connecting end of the connecting tube body 111 . A limiting step 4 is provided on the connecting portion of each stepped tube body.
[0023] The free end of the guide tool 12 is a sloped structure.
[0024] The inner tube of the guide tool 12 is a stepped tube structure, and the inner tube diameter of the stepped tube structure is gradually reduced from the connecting end to the free end of the guide tool 12, and a limiting step 3 is provided on the connecting part of each stepped tube body.
[0025] The mechanical catching tool comprises a flushing tool 2 and a salvaging tool 3. The flushing tool 2 comprises a rod body 22. A buckle structure 21 is provided at the rear end of the rod body 22. A flushing joint 23 is provided at the front end of the rod body 22. A steel wire catching tool 24 is provided on the flushing joint 23.
[0026] The fishing tool 3 includes an upper joint 31, a core shaft 32, an outer cylinder 33, a shear pin 34, a cylinder body 35, a main spring 36, a fishing claw spring 37, a spring fixing sleeve 38, a fishing claw fixing sleeve 39, a fishing claw 310 and a locking screw 311. The upper joint 31 is arranged at the end of the core shaft 32 and is fixed by the locking screw 311. The core shaft 32 is nested in the outer cylinder 33. The core shaft 32 and the outer cylinder 33 are connected by the shear pin 34. The cylinder body 35 is arranged on the outer cylinder 33, an annular groove is formed between the outer cylinder 33 and the core shaft 32, the main spring 36 is nested and arranged on the outside of the core shaft 32, the spring fixing sleeve 38 is arranged corresponding to the main spring 36, the salvage claw spring 37 is nested and arranged in the spring fixing sleeve 38, the spring fixing sleeve 38 and the salvage claw spring 37 are arranged in the cylinder body 35, the salvage claw fixing sleeve 39 is nested and arranged in the cylinder body 35 to match the salvage claw spring 37, and the salvage claw 310 is arranged in the setting groove of the salvage claw fixing sleeve 39.
[0027] The working principle of the utility model is as follows.
[0028] Step 1, such as Figure 1-3 As shown, a combined introduction tool 11 and a guide tool 12 are introduced into the fish dropping pipe string through a guide shoe, and the pipe string is straightened so that the eccentric fish dropping is in the center position, and the pressure is released to allow the guide introduction tool 1 to remain in the well, so as to facilitate the introduction of small-sized tools into the fish cavity.
[0029] Furthermore, the introduction tool 11 is connected to the guide tool 12 through a connecting tube body 111 by a thread. A first tube body 112 is provided on the free end of the connecting tube body 111, and a second tube body 113 is provided on the first tube body 112. The connection between the first tube body 112 and the second tube body 113, the first tube body 112, the second tube body 113 and the inner tube of the connecting tube body 111 form a fish cavity passage with a decreasing diameter, and the fish cavity passage with a decreasing diameter cooperates with the limiting step 4 provided on the turning part to play the role of straightening the flushing tool 2 and the salvage tool 3. In contrast, the stepped tube body structure in the guide tool 12 is used to straighten the fallen fish for easy salvage. The introduction tool 11 adopts a method of connecting different tube bodies by threads, which can not only effectively improve the tensile strength, but also adjust the rod body length according to specific circumstances, which is convenient for material preparation and maintenance.
[0030] The introduction tool 11 is used in combination with the guide tool 12, both of which use a pipe string structure. The tensile strength of the pipe string is much higher than the steel wire characteristics used in conventional salvage plugs, which greatly increases the upper limit of the lifting tonnage during salvage and provides convenient conditions for salvage operations.
[0031] The fishing tool 3 is assembled before use, and the specific assembly process is as follows:
[0032] Install the fishing claw 310 into the groove of the fishing claw fixing sleeve 39, install the fishing claw fixing sleeve 39 into the cylinder 35, insert the fishing claw spring 37 into the spring fixing sleeve 38, install the spring fixing sleeve 38 and the fishing claw spring 37 into the middle of the cylinder 35 together, and push them to the bottom, put the main spring 36 into the outer cylinder 33, and insert the outer cylinder 33 and the main spring 36 into the core shaft 32 together, adjust the pin hole of the outer cylinder 33 to align with the core shaft 32, and insert the shear pin 34, the thread of the outer cylinder 33 is connected with the thread of the cylinder 35, and tighten; finally, connect the upper joint 31, tighten it, and install the locking screw 311.
[0033] Step 2: Use drilling tools to lower the mechanical plugging tool according to the model of the plugger inside the fish trap.
[0034] Step 3, such as Figure 4-5 As shown, the mechanical fishing and plugging tool is lowered into the fish cavity through the guide introduction tool. When the tool reaches above the top of the fish, the lifting and lowering of the suspended weight is tested. The pump is turned on and the flushing tool 2 is used to flush the top of the fish. The tool is pressed down to make the core shaft of the fishing tool 3 go down to grab the plug. The lifting tool salvages the recovery tool and the plug.
[0035] Furthermore, the flushing tool 2 of the mechanical fishing plugging tool is provided with a buckle structure 21 at the tail end of the rod body 22, which is connected to the fishing tool through the buckle structure 21. The flushing joint 23 can flush the scale or formation sand deposited on the plugger, thereby improving the success rate of fishing the plugger, and can be used as a circulation point, while ensuring the safety of wellbore control.
[0036] The salvage tool 3 of the mechanical plugging tool recovers the downhole plug through the inner salvage neck. After the salvage claw 310 grabs the inner salvage neck of the plug, the plug lock key is recovered by the lifting tool to separate it from the limiting step of the working cylinder. The lock key that cooperates with the salvage claw 310 and the core shaft 32 is used to ensure that the tool will not fall out of the hand during the strong lifting process; the salvage module contains a shear pin 34. When the maximum lifting force still cannot salvage the plug, the shear pin 34 can be shaken downward, the load of the salvage claw spring 37 is released, and the salvage claw 310 returns to the retracted position to achieve release.
[0037] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.
Claims
1. A guiding and plugging device for scaling wells, characterized in that: The invention comprises a guide introduction tool, a mechanical plugging tool is detachably provided in the fish cavity of the guide introduction tool, the guide introduction tool is composed of an introduction tool and a guide tool connected to each other, the introduction tool and the guide tool are a pipe column structure, the introduction tool is composed of a connecting pipe body, a first pipe body and a second pipe body, one end of the connecting pipe body is a connecting end, the connecting pipe body is connected to the guide tool through the connecting end, the first pipe body is connected to the free end of the connecting pipe body through a thread, a second pipe body is provided on the outside of the first pipe body, and limiting steps are provided on the free ends of the inner pipes of the first pipe body and the second pipe body.
2. The device for guiding and plugging in scaling wells according to claim 1, characterized in that: The inner tube of the connecting tube body is a stepped tube structure, the diameter of the inner tube of the stepped tube structure gradually decreases from the free end to the connecting end of the connecting tube body, and a limiting step is provided on the connecting part of each stepped tube body.
3. The device for guiding and plugging in scaling wells according to claim 1, characterized in that: The free end of the guide tool is a sloped structure.
4. The device for guiding and plugging in scaling wells according to claim 1, characterized in that: The inner tube of the guide tool is a stepped tube structure, the inner tube diameter of which is gradually reduced from the connecting end to the free end of the guide tool, and a limiting step is provided on the connecting part of each stepped tube body.
5. A guiding and plugging device for scaling wells according to any one of claims 1 to 4, characterized in that: The mechanical plugging removal tool comprises a flushing tool and a salvage tool. The lower end of the flushing tool is connected to the upper joint of the salvage tool. The flushing tool comprises a rod body. The rear end of the rod body is provided with a buckle structure. The head end of the rod body is provided with a flushing joint. A steel wire external salvage tool is provided on the flushing joint.
6. The device for guiding and plugging in scaling wells according to claim 5, characterized in that: The salvage tool comprises an upper joint, a core shaft, an outer cylinder, a shear pin, a cylinder body, a main spring, a salvage claw spring, a spring fixing sleeve, a salvage claw fixing sleeve, a salvage claw and a locking screw. The upper joint is arranged at the end of the core shaft and fixed by the locking screw. The core shaft is nested in the outer cylinder. The core shaft and the outer cylinder are connected by the shear pin. The cylinder body is arranged on the outer cylinder. An annular groove body is formed between the outer cylinder and the core shaft. The main spring is nested outside the core shaft. The spring fixing sleeve is arranged corresponding to the main spring. The salvage claw spring is nested in the spring fixing sleeve. The spring fixing sleeve and the salvage claw spring are arranged in the cylinder body. The salvage claw fixing sleeve is nested in the cylinder body and matches the salvage claw spring. The salvage claw is arranged in the setting groove of the salvage claw fixing sleeve.