A fishing device for oil downhole operations
By placing the threaded rod inside the cylinder and using a motor to drive the threaded rod to rotate, which in turn causes the rectangular rod to retract and unfold the fixing rod and the net, the problem of impurities adhering to the surface of the threaded rod affecting the device is solved, thus achieving efficient filtration and retrieval of impurities in the well.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG SHENGYUANTONG PETROLEUM TECH SERVICE CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-06-19
AI Technical Summary
In existing downhole oil well equipment, the threaded rod is exposed, which causes impurities to adhere and affect the connection between the threaded rod and the threaded block, making the equipment unable to function properly.
Design an oil well downhole fishing device with a threaded rod inside a cylinder. The threaded rod is driven by a motor to rotate, which in turn causes a rectangular rod to retract, unfolding a fixed rod and a net to filter and retrieve impurities.
This effectively prevents the threaded rod surface from coming into contact with impurities, ensuring the normal operation of the device and improving salvage efficiency and reliability.
Smart Images
Figure CN224379792U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of salvage devices, and in particular to a salvage device for oil well operations. Background Technology
[0002] Oil and natural gas are buried tens to thousands of meters underground in oil and gas layers. To extract them, an oil and gas channel needs to be established between the surface and the underground oil and gas layers; this channel is called a well. In the process of oil and gas exploration and development, any well drilled to obtain oil and gas from underground is collectively called an oil well. Well debris in oil fields mainly refers to metal and other tangible materials that fall into the well from the wellhead, tubing, or logging equipment.
[0003] Chinese utility model CN210289687U discloses a fishing device for oil well operations. The device designs a fishing structure that works by lowering a support column down into the oil well. A motor drives a threaded rod to rotate, which in turn moves a threaded block downwards and rotates a reinforcing rod. The bottom of the reinforcing rod pushes a fixed rod to rotate, causing the fixed rod to unfold. The filter screen at the interval of the fixed rod unfolds accordingly, allowing impurities to be retrieved while filtering the oil.
[0004] However, in existing devices, the threaded rod is exposed, and during actual use, its surface comes into direct contact with oil and impurities. Impurities adhering to the threaded rod can affect the connection between the rod and the threaded block, rendering the device unusable. Therefore, a salvage mechanism less susceptible to these problems was designed. Utility Model Content
[0005] The purpose of this invention is to provide an oil well fishing device to solve the problems mentioned in the background art.
[0006] The technical solution adopted in this utility model is:
[0007] A downhole oil well fishing device includes: a connecting rod fixedly mounted on the top of a cylinder; a fishing assembly disposed inside the cylinder, the fishing assembly including: a motor disposed inside the cylinder; a threaded rod inserted into the cylinder and fixedly connected to the output shaft of the motor, and rotatably connected to the cylinder; a rectangular rod with its top end inserted into the cylinder and penetrated by the threaded rod, and threadedly connected to the threaded rod; a fixed rod with its bottom end rotatably connected to the bottom end of the rectangular rod; two ends of a support rod rotatably connected to the cylinder and the fixed rod respectively; and a net fixedly disposed at the intervals of the fixed rod.
[0008] Optionally, the salvage assembly further includes a stop block fixedly disposed at the bottom of the threaded rod.
[0009] Optionally, the salvage assembly further includes a cone fixedly disposed at the bottom of the rectangular rod.
[0010] Optionally, the retrieval assembly further includes: holes formed on the surface of the net.
[0011] Optionally, a lighting assembly is provided on the outer side of the cylinder, the lighting assembly further comprising: a ring fixedly sleeved on the outer side of the cylinder; and a lighting lamp disposed on the outer wall of the ring and driven by an internal battery of the ring.
[0012] Optionally, the lighting assembly further includes: a positioning hole formed on the outer side wall of the cylinder; one end of the pull rod inserted into the interior of the ring; a spring sleeved on the outer side of the pull rod, and one end fixedly connected to the inner side wall of the ring; and one end of the insertion rod fixedly connected to one end of the pull rod and one end of the spring.
[0013] Optionally, the lighting assembly further includes a groove formed on the inner side of the ring body; and a protrusion fixedly disposed on the outer side wall of the cylinder.
[0014] Optionally, the lighting assembly further includes a pull button fixedly disposed at one end of the pull rod.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] The salvage component on the salvage device uses a motor to drive the threaded rod to rotate. When the threaded rod rotates, it is threadedly connected to the rectangular rod, which can drive the rectangular rod to retract, thereby cooperating with the support rod to unfold the fixed rod. The net at the interval of the fixed rod can filter oil and filter out debris, and salvage it from downhole. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of this application;
[0019] Figure 2 This is a structural diagram from the second perspective in this application;
[0020] Figure 3 This is a schematic diagram of the salvage component in this application;
[0021] Figure 4 This is a schematic diagram of the lighting component in this application.
[0022] Reference numerals: 11. Cylinder; 12. Connecting rod;
[0023] 2. Salvage components; 21. Motor; 22. Threaded rod; 23. Rectangular rod; 24. Fixing rod; 25. Support rod; 26. Net; 27. Stop block; 28. Cone; 29. Hole;
[0024] 3. Lighting assembly; 31. Ring body; 32. Lighting lamp; 33. Positioning hole; 34. Pull rod; 35. Spring; 36. Insert rod; 37. Groove; 38. Raised strip; 39. Pull button. Detailed Implementation
[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0026] The current technology works by lowering a support column into the oil well, then using a motor to rotate a threaded rod. As the threaded rod rotates, the threaded block moves downwards, causing a reinforcing rod to rotate. The bottom of the reinforcing rod pushes a fixed rod to rotate, causing it to unfold. This unfolds the filter screens at the intervals between the fixed rods, allowing for the filtration of oil and the removal of impurities. However, in existing devices, the threaded rod is exposed. In actual use, the surface of the threaded rod comes into direct contact with oil and impurities. Impurities adhering to the threaded rod can affect the connection between the threaded rod and the threaded block, rendering the device unusable.
[0027] As shown in the attached drawings, this embodiment of the invention provides a downhole oil well fishing device.
[0028] The assembly includes: a connecting rod 12 fixedly mounted on the top of a cylinder 11; a retrieval assembly 2 disposed inside the cylinder 11, the retrieval assembly 2 including: a motor 21 disposed inside the cylinder 11; a threaded rod 22 inserted inside the cylinder 11 and fixedly connected to the output shaft of the motor 21, and rotatably connected to the cylinder 11; a rectangular rod 23 with its top end inserted inside the cylinder 11 and penetrated by the threaded rod 22, and threadedly connected to the threaded rod 22; a fixing rod 24 with its bottom end rotatably connected to the bottom end of the rectangular rod 23; a support rod 25 with both ends rotatably connected to the cylinder 11 and the fixing rod 24 respectively; and a net 26 fixedly disposed at the intervals of the fixing rod 24.
[0029] Specifically, the connecting rod 12 is a multi-segment design, which is connected to each other by threads. The length of the connecting rod 12 can be adjusted according to the depth of the oil well.
[0030] In operation, the motor 21 is first connected to an external power source. Simultaneously, the cylinder 11 is lowered into the well using the connecting rod 12. Once the cylinder 11 is fully submerged below the oil, the motor 21 drives the threaded rod 22 to rotate. Because the threaded rod 22 is threadedly connected to the rectangular rod 23, and the rectangular rod 23 is inserted into the cylinder 11 and restricted from rotation, the rotation of the threaded rod 22 allows the rectangular rod 23 to retract into the cylinder 11. This retraction also drives the bottom fixing rod 24 to rotate. The inner side of the fixing rod 24 is connected to the support rod 25, so the retraction of the rectangular rod 23 causes the fixing rod 24 to unfold, and the mesh between the fixing rods 24 unfolds accordingly. Finally, the connecting rod 12 is pulled, moving the cylinder 11 upwards. The mesh filters the oil and retrieves debris that has fallen into the well. Compared to existing devices, the threaded rod 22, being located internally, is less susceptible to interference.
[0031] In some embodiments, the salvage assembly 2 further includes a stop 27 fixedly disposed at the bottom of the threaded rod 22.
[0032] The design of the stop 27 can prevent the top of the rectangular rod 23 from detaching from the cylinder 11 when it is raised or lowered.
[0033] In some embodiments, the salvage assembly 2 further includes a cone 28 fixedly disposed at the bottom of the rectangular rod 23.
[0034] The design of cone 28 reduces resistance when it is inserted into the oil.
[0035] In some embodiments, the retrieval assembly 2 further includes: holes 29 formed on the surface of the net 26.
[0036] The design of the 29-hole aperture can speed up the passage of oil and better filter impurities.
[0037] In some embodiments, an illumination component 3 is provided on the outer side of the cylinder 11. The illumination component 3 further includes: a ring 31 fixedly sleeved on the outer side of the cylinder 11; and an illumination lamp 32 disposed on the outer wall of the ring 31 and driven by an internal battery of the ring 31.
[0038] The cylinder 11 and the lighting lamp 32 can provide lighting during the salvage operation, making it easier to retrieve debris.
[0039] In some embodiments, the lighting assembly 3 further includes: a positioning hole 33 formed on the outer side wall of the cylinder 11; a pull rod 34, one end of which is inserted into the interior of the ring 31; a spring 35 sleeved on the outer side of the pull rod 34, and one end of which is fixedly connected to the inner side wall of the ring 31; and an insertion rod 36, one end of which is fixedly connected to one end of the pull rod 34 and the spring 35.
[0040] When the height of the lighting lamp 32 needs to be adjusted, the pull rod 34 can be pulled to retract the insertion rod 36 and squeeze the spring 35 at the same time, so that the insertion rod 36 is disengaged from the positioning hole 33. At the same time, the ring body 31 is controlled to move up and down to adjust the height of the lighting lamp 32. After adjusting to the appropriate position, the pull rod 34 is released and the spring 35 rebounds to push the insertion rod 36 into the interior of the positioning hole 33 to fix the ring body 31.
[0041] In some embodiments, the lighting assembly 3 further includes a groove 37 formed on the inner side of the ring 31; and a protrusion 38 fixedly disposed on the outer side wall of the cylinder 11.
[0042] While the ring 31 moves up and down, the groove 37 slides on the outside of the protrusion 38, which can restrict the rotation of the ring 31.
[0043] In some embodiments, the lighting assembly 3 further includes a pull button 39 fixedly disposed at one end of the pull rod 34.
[0044] The design of the pull button 39 makes it easy to grip and provides better control over the movement of the lever 34.
[0045] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A downhole oil well fishing device, comprising: A cylindrical tube (11) has a connecting rod (12) fixedly installed at the top; The feature is that a retrieval assembly (2) is provided inside the cylinder (11), and the retrieval assembly (2) includes: The motor (21) is located inside the cylinder (11); A threaded rod (22) is inserted into the inside of the cylinder (11) and fixedly connected to the output shaft of the motor (21), and rotatably connected to the cylinder (11); A rectangular rod (23) is inserted into the interior of the cylinder (11) at its top end and is penetrated by the threaded rod (22) and threadedly connected to the threaded rod (22); The bottom end of the fixed rod (24) is rotatably connected to the bottom end of the rectangular rod (23); The support rod (25) is rotatably connected at both ends to the cylinder (11) and the fixed rod (24), respectively; The net (26) is fixedly installed at the intervals of the fixing rod (24).
2. The oil well downhole fishing device according to claim 1, characterized in that, The salvage assembly (2) also includes: The stop block (27) is fixedly installed at the bottom of the threaded rod (22).
3. The oil well downhole fishing device according to claim 1, characterized in that, The salvage assembly (2) also includes: The cone (28) is fixedly installed at the bottom of the rectangular rod (23).
4. The oil well downhole fishing device according to claim 1, characterized in that, The salvage assembly (2) also includes: Holes (29) are formed on the surface of the net (26).
5. The oil well downhole fishing device according to claim 1, characterized in that, An illumination assembly (3) is provided on the outer side of the cylinder (11), and the illumination assembly (3) further includes: The ring (31) is fixedly sleeved on the outside of the cylinder (11); A lighting lamp (32) is disposed on the outer wall of the ring (31) and is driven by an internal battery of the ring (31).
6. The oil well downhole fishing device according to claim 5, characterized in that, The lighting component (3) also includes: A positioning hole (33) is provided on the outer side wall of the cylinder (11); A pull rod (34) is inserted into the interior of the ring (31) at one end; A spring (35) is sleeved on the outside of the pull rod (34) and one end is fixedly connected to the inner wall of the ring (31); The insertion rod (36) is fixedly connected at one end to the pull rod (34) and the spring (35).
7. The oil well downhole fishing device according to claim 6, characterized in that, The lighting component (3) also includes A groove (37) is formed on the inner side of the ring (31); The protruding strip (38) is fixedly disposed on the outer side wall of the cylinder (11).
8. The oil well fishing and retrieval device according to claim 6, characterized in that, The lighting component (3) also includes: A pull button (39) is fixedly installed at one end of the pull rod (34).