Fishing tool for top end of rope drilling tool
By designing the structure of the pusher cylinder, connecting rod, top block, conical groove, collar, and spring cylinder, the problem of flexibility in the drilling tool tip was solved, enabling stable retrieval and flexible withdrawal of the drilling tool cylinder, thus improving efficiency.
Patent Information
- Application Number
- CN202520664206.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-04-10
AI Technical Summary
The existing wireline drilling tools are secured to the drill bit by a retrieval tool at the top, which affects the flexibility of use and makes it difficult to disassemble and reinstall them flexibly.
A structure including a pusher cylinder, connecting rod, top block, conical groove, collar, spring sleeve, and anti-slip texture is designed. After the connecting rod is inserted into the drill bit body, the elastic expansion and friction of the spring sleeve are used to achieve stable retrieval of the drill bit body, and the binding can be quickly released when needed.
It enables stable retrieval and flexible withdrawal of the drill string, avoids damage to internal components of the drill string, and improves the efficiency and flexibility of the retrieval tool.
Smart Images
Figure CN223767467U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rope drilling technology, specifically a retrieval tool for the top of a rope drilling tool. Background Technology
[0002] Drill tool retrieval tools are specialized instruments used in downhole operations to retrieve broken, detached, or stuck metal parts such as drill bits and drill pipes. They are widely used in fields such as oil drilling, coal mining, and water well drilling.
[0003] Existing wireline drilling tools use a retrieval tool at the top. When retrieving the drill string, the retrieval tool is inserted into the upper part of the drill string barrel and locked. Then, the drill string can be pulled out with the retrieval tool. However, after locking, the entire retrieval tool is bound to the drill string. If retrieval is not needed at this time, it is necessary to take it out together with the drill string, disassemble it, and reinstall the drill string, which greatly affects the flexibility of the retrieval tool when it is used.
[0004] Therefore, in view of this, we have studied and improved the existing structure to address its shortcomings, and proposed a retrieval tool for the top of a rope drill. Utility Model Content
[0005] The purpose of this invention is to provide a retrieval tool for the top of a rope drill bit to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a retrieval tool for the top of a rope drill bit, comprising a pusher cylinder, a connecting rod slidably disposed on the inner surface of the pusher cylinder, the bottom diameter of the connecting rod being larger than the top diameter, forming an overall cone shape, top blocks being evenly distributed and fixedly installed on the lower surface of the connecting rod, the gap between the top blocks being a conical groove, a collar being sleeved on the surface of the connecting rod, a spring clip being fixedly installed on the lower surface of the collar, the bottom end of the spring clip being a slope, the spring clip also being sleeved on the surface of the connecting rod, and an anti-slip texture being provided on the outer surface of the spring clip.
[0007] Preferably, a probing cone is fixedly installed at the bottom end of the connecting rod, and a ball head is rotatably connected to the bottom end of the probing cone.
[0008] Preferably, a transmission rod is fixedly connected to the upper end of the outer surface of the push cylinder, and the transmission rod is the power transmission component of the entire salvage tool.
[0009] Preferably, four sliding grooves are evenly distributed on the inner surface of the pusher cylinder, and the sliding grooves form a cross groove inside the pusher cylinder.
[0010] Preferably, four sliders are evenly distributed and fixedly installed on the upper surface of the connecting rod, and the sliders cause the top of the connecting rod to form a cross shape.
[0011] Preferably, the sliders are all slidably disposed inside the slide groove, and the sliders utilize the limiting position of the slide groove to connect the connecting rod with the push cylinder.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. This utility model, through the design of a pusher cylinder, connecting rod, top block, conical groove, collar, spring clip cylinder, and anti-slip texture, allows the spring clip cylinder to slide downwards and insert into the drill bit barrel after the connecting rod is inserted into the barrel to be removed. The pusher cylinder moves downwards, pushing the collar downwards, thus causing the spring clip cylinder to slide downwards and insert into the drill bit barrel. The drill bit barrel causes the spring clip cylinder to contract inwards. After insertion, the spring clip cylinder's own elastic force causes it to expand, ensuring that the spring clip cylinder fits against the inner surface of the drill bit barrel. Then, the connecting rod is rotated to align the conical groove with the plate of the spring clip cylinder. After alignment, the pusher cylinder can pull the connecting rod upwards. When the connecting rod moves upwards, due to friction between the spring clip cylinder and the drill bit barrel, it does not move the spring clip cylinder upwards. At this time, the plate of the spring clip cylinder will align with the conical groove and insert. The shape of the conical groove will squeeze the spring clip cylinder from the inside, further expanding it outwards. Utilizing the anti-slip texture, from... The spring canister fits more tightly and securely into the drill string. When the connecting rod moves upward, it uses the tension between itself and the spring canister to pull the spring canister upward. The spring canister then uses the friction of the tight fit to pull the entire drill string upward for retrieval. After the spring canister is inserted into the drill string and retrieval is no longer needed, the connecting rod rotates so that the top block aligns with the bottom of the spring canister's plate. At this time, when the connecting rod moves upward, the spring canister is not subjected to secondary expansion, so the fit with the drill string is not as tight. The connecting rod will use the top block to hook the spring canister directly out of the drill string without pulling it out. The entire retrieval tool can not only perform stable and effective retrieval work, but also stop retrieval midway and smoothly withdraw the retrieval tool, making it more efficient and flexible to use.
[0014] 2. This utility model, through the design of the probing cone, ball head, groove, and slider, utilizes the groove to limit the slider, ensuring that when the transmission rod drives the push cylinder to rotate, the connecting rod can accurately follow the rotation. Furthermore, the height of the groove allows the slider to slide upwards sufficiently. Even when the push cylinder is pushed by the downward force of the transmission rod to push the spring cylinder, if the connecting rod is blocked by internal components of the drill barrel, it will not move downwards synchronously, preventing excessive downward movement of the connecting rod and damage to internal components of the drill barrel. If the drill barrel is tilted within the drill outer sleeve, when the probing cone extends downwards, the ball head preferentially contacts the drill barrel. The rolling motion of the ball head reduces friction between the drill barrel and the entire connecting rod. Simultaneously, the inclined conical surface of the probing cone automatically straightens the drill barrel, ensuring a proper connection between the retrieval tool and the drill barrel. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;
[0016] Figure 2This is a schematic diagram of the disassembled structure of the connecting rod and spring cylinder of this utility model;
[0017] Figure 3 This is a frontal sectional view of the pusher cylinder of this utility model.
[0018] In the diagram: 1. Push cylinder; 2. Connecting rod; 3. Push block; 4. Conical groove; 5. Collar; 6. Spring cylinder; 7. Anti-slip texture; 8. Probing cone; 801. Ball head; 9. Transmission rod; 10. Slide groove; 11. Sliding block. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] like Figures 1-3 As shown, a retrieval tool for the top of a rope drill includes a pusher cylinder 1. A connecting rod 2 is slidably disposed on the inner surface of the pusher cylinder 1. The bottom diameter of the connecting rod 2 is larger than the top diameter, forming a cone shape. Top blocks 3 are evenly distributed and fixedly installed on the lower surface of the connecting rod 2. The gap between the top blocks 3 is set as a conical groove 4. A collar 5 is sleeved on the surface of the connecting rod 2. A spring clip 6 is fixedly installed on the lower surface of the collar 5. The bottom end of the spring clip 6 is set as an inclined surface. The spring clip 6 is also sleeved on the surface of the connecting rod 2. The outer surface of the spring clip 6 is provided with anti-slip texture 7.
[0021] By adopting the above technical solution, after the connecting rod 2 is inserted into the drill bit barrel that needs to be removed, the pusher cylinder 1 moves down and pushes the collar 5 down, so that the spring clip 6 slides down and is inserted into the drill bit barrel. The drill bit barrel will cause the spring clip 6 to contract inward. After the spring clip 6 is inserted, its own elastic force will cause it to expand, thereby ensuring that the spring clip 6 fits the inner surface of the drill bit barrel.
[0022] When the connecting rod 2 moves upward, due to the friction between the spring clip 6 and the drill barrel, the spring clip 6 will not move upward. At this time, the plate of the spring clip 6 will be aligned with the conical groove 4 and inserted. The shape of the conical groove 4 will squeeze the spring clip 6 from the inside and further expand it outward. With the help of the anti-slip texture 7, the spring clip 6 will fit the drill barrel more tightly and firmly.
[0023] When the connecting rod 2 moves upward, it will use the tension between itself and the spring tube 6 to pull the spring tube 6 upward. The spring tube 6 will then use the friction of the close contact to pull the entire drill barrel upward for retrieval.
[0024] After the spring clip 6 is inserted into the drill string, and there is no need for retrieval, the connecting rod 2 rotates so that the top block 3 is aligned with the bottom of the plate of the spring clip 6. At this time, when the connecting rod 2 moves upward, the spring clip 6 is not subjected to secondary expansion, so the fit with the drill string is not so tight. The connecting rod 2 will use the top block 3 to directly hook the spring clip 6 out of the drill string without taking it out of the drill string.
[0025] Furthermore, a probing cone 8 is fixedly installed at the bottom end of the connecting rod 2, and a ball head 801 is rotatably connected to the bottom end of the probing cone 8.
[0026] By adopting the above technical solution, if the drill string is tilted inside the drill string outer sleeve, when the probe cone 8 moves down and extends in, the ball head 801 will contact the drill string first. By utilizing the rolling of the ball head 801, the friction between the drill string and the entire connecting rod 2 can be reduced. At the same time, in conjunction with the inclined conical surface of the probe cone 8, the drill string can be automatically straightened.
[0027] Furthermore, a transmission rod 9 is fixedly connected to the upper end of the outer surface of the push cylinder 1. The transmission rod 9 is the power transmission component of the entire salvage tool.
[0028] The inner surface of the push cylinder 1 is evenly provided with four sliding grooves 10, and the sliding grooves 10 form a cross groove inside the push cylinder 1; four sliders 11 are evenly distributed and fixedly installed on the upper surface of the connecting rod 2, and the sliders 11 form a cross rod shape at the top of the connecting rod 2; the sliders 11 are all slidably disposed inside the sliding grooves 10, and the sliders 11 are connected to the connecting rod 2 and the push cylinder 1 by using the limiting of the sliding grooves 10.
[0029] By adopting the above technical solution, when the sliding groove 10 limits the slider 11 so that the transmission rod 9 drives the push cylinder 1 to rotate, the connecting rod 2 can accurately follow the rotation.
[0030] The height of the groove 10 allows the slider 11 to slide upwards fully. Even if the push cylinder 1 is pushed by the downward force of the transmission rod 9 to push the spring cylinder 6, if the connecting rod 2 is blocked by the internal components of the drill barrel, it will not move downwards synchronously, thus avoiding damage to the internal components of the drill barrel caused by excessive downward movement of the connecting rod 2.
[0031] Working principle: When using the retrieval tool at the top of the rope drill bit, firstly, the entire connecting rod 2, along with the transmission rod 9, is inserted into the drill bit outer sleeve. The connecting rod 2 extends into the upper end of the drill bit sleeve. If the drill bit sleeve is tilted inside the outer sleeve, when the probe cone 8 moves down and extends in, the ball head 801 first contacts the drill bit sleeve. The rolling motion of the ball head 801 reduces friction between the drill bit sleeve and the entire connecting rod 2. Simultaneously, the inclined conical surface of the probe cone 8 automatically straightens the drill bit sleeve, ensuring a proper connection between the retrieval tool and the drill bit sleeve. The connecting rod 2 then inserts into the drill bit sleeve that needs to be removed. After entering the drill bit, the pusher cylinder 1 moves downward, pushing the collar 5 downward. The height of the slide groove 10 allows the slider 11 to move upward and slide fully. Even when the pusher cylinder 1 is pushed by the downward force of the transmission rod 9 to push the spring cylinder 6, if the connecting rod 2 is blocked by the internal components of the drill bit barrel, it will not move downward synchronously, thus avoiding excessive downward movement of the connecting rod 2 and damage to the internal components of the drill bit barrel. The drill bit barrel will cause the spring cylinder 6 to contract inward. After the spring cylinder 6 is inserted, its own elastic force will cause it to expand, thereby ensuring that the spring cylinder 6 fits against the inner surface of the drill bit barrel. Then, the pusher cylinder is rotated by the transmission rod 9. 1. Under the transmission of slider 11 and groove 10, rotating connecting rod 2 aligns the conical groove 4 with the plate of spring cylinder 6. After alignment, push cylinder 1 can pull connecting rod 2 upward. When connecting rod 2 moves upward, due to the friction between spring cylinder 6 and drill barrel, it will not drive spring cylinder 6 upward. At this time, the plate of spring cylinder 6 will be aligned with the conical groove 4 and inserted. The shape of conical groove 4 will squeeze spring cylinder 6 from the inside and further expand it outward. Utilizing anti-slip texture 7, spring cylinder 6 will fit more tightly and firmly against drill barrel. When connecting rod 2 moves upward, it will utilize its own friction with spring cylinder 6... The tension between the spring canisters pulls the spring canister 6 upwards. The spring canister 6 then uses the friction of the close contact to pull the entire drill string upwards for retrieval. After the spring canister 6 is inserted into the drill string and retrieval is no longer needed, the connecting rod 2 rotates, so that the top block 3 is aligned with the bottom of the spring canister 6's plate. At this time, when the connecting rod 2 moves upwards, the spring canister 6 is not subjected to secondary expansion, so the contact with the drill string is not as tight. The connecting rod 2 will use the top block 3 to directly hook the spring canister 6 out of the drill string without pulling it out of the drill string. This is the working principle of the retrieval tool at the top of the wireline drill.
Claims
1. A fishing tool for a rope drilling tool top end, comprising a push-on cylinder (1), characterised in that, The inner surface of the push cylinder (1) is slidably provided with a connecting rod (2), the bottom end diameter of the connecting rod (2) is greater than the upper end diameter, and the whole forms a taper, the lower surface of the connecting rod (2) is uniformly distributed and fixedly installed with a jack (3), the gap between the jacks (3) is provided as a taper groove (4), the surface of the connecting rod (2) is sleeved with a sleeve ring (5), the lower surface of the sleeve ring (5) is fixedly installed with an elastic sheet cylinder (6), the bottom end of the elastic sheet cylinder (6) is provided as an inclined surface, the elastic sheet cylinder (6) is also sleeved on the surface of the connecting rod (2), and the outer surface of the elastic sheet cylinder (6) is provided with anti-skid lines (7).
2. A fishing tool for use with a rope drilling tool top end as defined in claim 1, characterized in that, The bottom end of the connecting rod (2) is fixedly installed with a probe cone head (8), and the bottom end of the probe cone head (8) is rotatably connected with a ball head (801).
3. A fishing tool for use with a rope drilling tool top end as defined in claim 1, characterized in that, The outer surface of the push cylinder (1) is fixedly connected with a transmission rod (9) at the upper end, and the transmission rod (9) is a power transmission member of the whole fishing tool.
4. A fishing tool for use with a rope drilling tool top end as defined in claim 1, wherein, The inner surface of the push cylinder (1) is uniformly distributed and provided with four sliding grooves (10), and the sliding grooves (10) form a cross groove in the inside of the push cylinder (1).
5. A fishing tool for use with a rope drilling tool top end as defined in claim 1, wherein, The surface of the connecting rod (2) is uniformly distributed and fixedly installed with four sliding blocks (11) on the upper side, and the sliding blocks (11) form a cross rod shape at the top end of the connecting rod (2).
6. A fishing tool for use with a rope drilling tool head as defined in claim 5, characterized in that The sliding blocks (11) are slidably arranged in the sliding grooves (10), and the sliding blocks (11) are limited by the sliding grooves (10) to connect the connecting rod (2) and the push cylinder (1).