Drill rod fishing tool
By designing a drill pipe retrieval tool that utilizes a slider assembly to withstand the axial and radial forces on the drill pipe, the problem of unretrievable broken drill pipes was solved, enabling stable recovery of the drill pipes and reducing economic losses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-14
AI Technical Summary
Drill rods that break during mining operations cannot be effectively retrieved, resulting in their scrapping and economic losses.
Design a drill pipe retrieval tool, including a first slider assembly and a second slider assembly. Through the cooperation of the inclined guide rail and the slider, the slider bears the axial and radial forces and stably pulls out the broken drill pipe.
This technology enables successful retrieval without damaging the drill pipe, reducing economic losses and improving the drill pipe recovery rate.
Smart Images
Figure CN224120215U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mining machinery technology, and in particular to a drill pipe retrieval tool. Background Technology
[0002] Drill pipes are used extensively in mining operations and are also very expensive. During drilling, drill pipes may break and fall into the well. Because wells are often over 100 meters deep and drill pipes are assembled units weighing several tons, they cannot be retrieved using conventional methods. While destroying the drill pipes could solve the problem, it would render them unusable, resulting in significant economic losses. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a drill pipe retrieval tool for retrieving broken drill pipes, which can avoid damaging the drill pipe and causing it to be scrapped, thus reducing economic losses.
[0004] The drill pipe retrieval tool according to an embodiment of the present utility model includes:
[0005] Rod body;
[0006] The first slider assembly includes a first guide rail and a first slider body, wherein the first slider body is slidably mounted on the first guide rail, and the first guide rail is mounted on the rod body;
[0007] The second slider assembly includes a second guide rail and a second slider body, wherein the second slider body is slidably mounted on the second guide rail, and the second guide rail is mounted on the rod body;
[0008] The first slider assembly and the second slider assembly are arranged at intervals along the vertical direction, with the first slider assembly positioned above the second slider assembly. The first guide rail and / or the second guide rail are inclined. The first slider body is used to abut against the drill rod to withstand axial force, and the second slider body is used to abut against the drill rod to withstand radial force.
[0009] The drill pipe retrieval tool according to the embodiments of this utility model has at least the following beneficial effects:
[0010] The retrieval tool of this embodiment can be inserted into the broken drill rod. Then, the first slider body of the first slider assembly slides downward along the first guide rail, and the second slider body of the second slider assembly slides downward along the second guide rail. Then, the retrieval tool is lifted up, so that both the first slider body and the second slider body abut against the broken drill rod. The first slider body bears the axial force of the broken drill rod, and the second slider body bears the radial force of the broken drill rod, thereby stably pulling out the broken drill rod. With the retrieval tool of this embodiment, the drill rod is not damaged and scrapped, effectively reducing economic losses.
[0011] According to some embodiments of the present invention, the rod body is provided with a first mounting groove and a second mounting groove, wherein the opening directions of the first mounting groove and the second mounting groove are opposite.
[0012] The first slider assembly is mounted in the first mounting slot, and the second slider assembly is mounted in the second mounting slot.
[0013] According to some embodiments of the present utility model, the first mounting groove includes a first groove wall and a first bottom wall, the first guide rail is mounted on the first bottom wall, the first groove wall is provided with a first flushing hole, and the first flushing hole is connected to a water supply device.
[0014] The first flushing hole flushes water onto the first slider body to drive the first slider body to slide along the first guide rail.
[0015] According to some embodiments of the present invention, the second mounting groove includes a second groove wall and a second bottom wall, the second guide rail is mounted on the second bottom wall, and the rod body is provided with a second flushing hole, the second flushing hole being connected to the first flushing hole;
[0016] The second flushing hole flushes water onto the second slider body to drive the second slider body to slide along the second guide rail.
[0017] According to some embodiments of the present invention, a water groove is provided on the outer peripheral wall of the rod, the water groove is connected to the second flushing hole, and the second flushing hole flushes water to the second slider body through the water groove.
[0018] According to some embodiments of the present invention, the first mounting groove is provided with a first positioning structure, and the first guide rail is provided with a first mating structure. The first positioning structure corresponds to the first mating structure to pre-position the first guide rail.
[0019] And / or, the second mounting groove is provided with a second positioning structure, and the second guide rail is provided with a second mating structure, the second positioning structure corresponding to the second mating structure, so as to pre-position the second guide rail.
[0020] According to some embodiments of the present invention, a first abutting surface is provided at the connection between the upper surface and the outer peripheral surface of the first slider body, and the first abutting surface is used to abut against the drill rod.
[0021] According to some embodiments of the present invention, the first mounting groove further includes a support surface, and the first slider body is provided with a second abutting surface, wherein the support surface can be in contact with the second abutting surface to support the first slider body.
[0022] According to some embodiments of the present invention, the first slider body is provided with a first slot for mounting the first guide rail, and the first slot is a T-shaped slot.
[0023] According to some embodiments of the present invention, the second slider body is provided with a second slot for mounting the second guide rail, and the second slot is a dovetail groove.
[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0026] Figure 1 This is a front view of the drill pipe retrieval tool according to an embodiment of this application;
[0027] Figure 2 for Figure 1 Sectional view along the middle AA direction;
[0028] Figure 3 for Figure 1 Sectional view along the BB direction;
[0029] Figure 4 This is a cross-sectional view of the drill pipe retrieval tool according to an embodiment of this application;
[0030] Figure 5 This is a schematic diagram of the assembly of the drill pipe retrieval tool according to an embodiment of this application.
[0031] Icon labels:
[0032] Rod body 100, first mounting groove 110, first groove wall 111, first bottom wall 112, first positioning structure 113, support surface 114, second mounting groove 120, second groove wall 121, second bottom wall 122, second positioning structure 123, first flushing hole 130, second flushing hole 140, water tank 150;
[0033] First slider assembly 200, first guide rail 210, first mating structure 211, first slider body 220, first abutting surface 221, second abutting surface 222, first slot 223;
[0034] The second slider assembly 300, the second guide rail 310, the second mating structure 311, the second slider body 320, and the second slot 321. Detailed Implementation
[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying 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, and therefore should not be construed as a limitation of this utility model.
[0037] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.
[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0039] Reference Figures 1 to 5 The drill pipe retrieval tool of this utility model includes a rod body 100, a first slider assembly 200, and a second slider assembly 300. Both the first slider assembly 200 and the second slider assembly 300 are mounted on the rod body 100, with the first slider assembly 200 positioned above the second slider assembly 300. (See reference...) Figure 1As shown, the rod body 100 is provided with a first mounting groove 110 and a second mounting groove 120. The first slider assembly 200 includes a first guide rail 210 and a first slider body 220. The first slider body 220 is slidably mounted on the first guide rail 210, and the first guide rail 210 is mounted in the first mounting groove 110 of the rod body 100. The second slider assembly 300 includes a second guide rail 310 and a second slider body 320. The second slider body 320 is slidably mounted on the second guide rail 310, and the second guide rail 310 is mounted in the second mounting groove 120 of the rod body 100. Both the first guide rail 210 and the second guide rail 310 are inclined. When the first slider body 220 is located at the top of the first guide rail 210, the projection of the first slider body 220 on the horizontal plane is located within the projection of the rod 100 on the horizontal plane. When the first slider body 220 is located at the bottom of the first guide rail 210, the first slider body 220 extends radially out of the rod 100. Similarly, when the second slider body 320 is located at the top of the second guide rail 310, the projection of the second slider body 320 on the horizontal plane is located within the projection of the rod 100 on the horizontal plane. When the second slider body 320 is located at the bottom of the second guide rail 310, the second slider body 320 extends radially out of the rod 100.
[0040] Furthermore, refer to Figure 4 As shown, the retrieved drill rod comprises, from top to bottom, a first section, a second section, and a third section. The inner diameter of the first section is smaller than that of the third section. The second section is located between the first and third sections as a transition section. (Refer to...) Figure 1 , Figure 5As shown, both the first guide rail 210 and the second guide rail 310 are inclined. The bottoms of both the first slider body 220 and the second slider body 320 are arc-shaped. When the drill rod retrieval tool of this embodiment moves downward through the first hole section, the first slider body 220 will be pushed to the upper end of the first guide rail 210, and the second slider will be pushed to the upper end of the second guide rail 310. When the drill rod retrieval tool of this embodiment moves downward into the second hole section and the third hole section, the first slider body 220 will move along the first guide rail 210. The first slider body 220 slides to the lower end of the first guide rail 210, and the second slider body 320 slides along the second guide rail 310 to the lower end of the second guide rail 310, and comes into contact with the inner wall of the third hole section. After ensuring that the first slider body 220 slides to the lower end of the first guide rail 210 and the second guide rail 310 slides to the lower end of the second guide rail 310, the rod body 100 is pulled upward to make the first slider body 220 come into contact with the inner wall of the second hole section. Continuing to pull the rod body 100 upward, the first slider body 220 will drive the drill rod to be retrieved to move upward. In summary, the first slider body 220 is mainly used to bear axial force to drive the drill rod to be retrieved to rise; the second slider body 320 is mainly used to bear radial force to reduce the shaking of the drill rod to be retrieved, thereby stably pulling out the broken drill rod. With the retrieval tool of this embodiment, it is not necessary to damage the drill rod and cause it to be scrapped, effectively reducing economic losses.
[0041] Reference Figure 1 As shown, in order to more stably pull the broken drill rod upward and improve the structural strength of the rod body 100, the opening directions of the first mounting groove 110 and the second mounting groove 120 in this embodiment are preferably arranged opposite to each other.
[0042] Furthermore, in the embodiments of this utility model, referring to Figure 5 As shown, a first abutting surface 221 is provided at the connection between the upper surface and the outer peripheral surface of the first slider body 220. The first abutting surface 221 is used to abut against the inner wall of the second hole section of the drill rod. The shape of the first abutting surface 221 fits the shape of the inner wall of the first hole section.
[0043] In the embodiments of this utility model, reference is made to Figure 4 , Figure 5As shown, the first mounting groove 110 also includes a support surface 114, and the first slider body 220 is provided with a second abutment surface 222. The support surface 114 can abut against the second abutment surface 222 to support the first slider body 220. The support surface 114 is located at the bottom end of the first bottom wall 112, and the second abutment surface 222 is located at the bottom end of the first slider body 220. When the first slider body 220 slides to the bottom of the first guide rail 210, the first slider body 220 falls onto the support surface 114, and the second abutment surface 222 abuts against the support surface 114. The support surface 114 facilitates the first slider body 220 to transmit the axial force it bears to the rod body 100, thereby extending the service life of the first slider body 220.
[0044] Reference Figure 5 As shown, the outer peripheral surface of the first slider body 220 and / or the outer peripheral surface of the second slider body 320 in this embodiment are arc-shaped surfaces; since the second hole segment and the third hole segment are usually cylindrical holes, it is preferable that the outer peripheral surfaces of the first slider body 220 and the second slider body 320 are both arc-shaped surfaces.
[0045] In the embodiments of this utility model, reference is made to Figure 2 As shown, the first slider body 220 is provided with a first slot 223 for mounting the first guide rail 210, and the first slot 223 is a T-shaped slot. Specifically, as can be seen from the above, the first slider body 220 mainly bears axial force, and the T-shaped slot also has better anti-torsional performance.
[0046] In the embodiments of this utility model, reference is made to Figure 3 As shown, the second slider body 320 is provided with a second slot 321 for mounting the second guide rail 310. The second slot 321 is a dovetail groove. Specifically, as can be seen from the above, the second slider body 320 mainly bears radial force, so the requirements for the second slot 321 are relatively low. Using a dovetail groove can reduce manufacturing costs, while also making installation easier and miniaturizing the structure of the second slider body 320.
[0047] Furthermore, since the force directions of the first slider body 220 and the second slider body 320 are different, the depth of the first slot 223 and the depth of the second slot 321 also differ. Preferably, the depth of the first slot 223 is greater than the depth of the second slot 321.
[0048] In an embodiment of this utility model, the first mounting groove 110 includes a first groove wall 111 and a first bottom wall 112. The first guide rail 210 is mounted on the first bottom wall 112. The first groove wall 111 is provided with a first flushing hole 130, which is connected to a water supply device. The first flushing hole 130 flushes water onto the first slider body 220 to drive the first slider body 220 to slide along the first guide rail 210 and to clean the first slider body 220.
[0049] It should be noted that the water supply device only supplies water to the first flushing hole 130 after the rod 100 moves downward into the second and third hole sections. Setting the first flushing hole 130 to flush the first slider body 220 prevents the first slider body 220 from being obstructed by impurities and unable to slide downwards under its own weight, ensuring that the first slider body 220 can slide to the bottom of the first guide rail 210. Similarly, refer to... Figure 4 As shown, the second mounting groove 120 includes a second groove wall 121 and a second bottom wall 122. The second guide rail 310 is mounted on the second bottom wall 122. The rod body 100 is provided with a second flushing hole 140, which is connected to the first flushing hole 130. The second groove wall 121 is also a horizontal surface. The second flushing hole 140 flushes water onto the second slider body 320 to drive the second slider body 320 to slide along the second guide rail 310.
[0050] In one embodiment of this application, the first flushing hole 130 and the second flushing hole 140 are both disposed inside the rod body 100, the end of the first flushing hole 130 is located on the first groove wall 111, and the end of the second flushing hole 140 is located on the second groove wall 121.
[0051] In another embodiment of this application, reference is made to... Figure 4 As shown, the outer peripheral wall of the rod 100 is provided with a water groove 150, which is connected to the second flushing hole 140. The second flushing hole 140 flushes water to the second slider body 320 through the water groove 150. When the rod 100 is inserted into the second hole section and the third hole section, the outer peripheral wall of the rod 100 will contact the inner wall of the drill rod to be retrieved, thereby forming a channel between the water groove 150 and the inner wall of the drill rod to be retrieved. This allows the water in the second flushing hole 140 to flush water to the second slider body 320 along the water groove 150, so as to achieve the same technical effect of driving the second slider body 320 to slide along the second guide rail 310. Moreover, the technical solution of the water groove 150 can effectively reduce the manufacturing cost of the equipment.
[0052] In an embodiment of this utility model, the first mounting groove 110 is provided with a first positioning structure 113, and the first guide rail 210 is provided with a first mating structure 211. The first positioning structure 113 corresponds to the first mating structure 211 to pre-position the first guide rail 210; and / or, the second mounting groove 120 is provided with a second positioning structure 123, and the second guide rail 310 is provided with a second mating structure 311. The second positioning structure 123 corresponds to the second mating structure 311 to pre-position the second guide rail 310. Specifically, refer to... Figure 4 , Figure 5As shown, the first positioning structure 113 is disposed on the first bottom wall 112, and the second positioning structure 123 is disposed on the second bottom wall 122. The first positioning structure 113 can be configured as a first positioning groove, and the first mating structure 211 is configured as a first protrusion to be installed in the first positioning groove. The first guide rail 210 is connected to the first bottom wall 112 by bolts or other fasteners. Correspondingly, the second positioning structure 123 can be configured as a second positioning groove, and the second mating structure 311 is configured as a second protrusion to be installed in the second positioning groove. The second guide rail 310 is connected to the second bottom wall 122 by bolts or other fasteners. Taking the first positioning structure 113 as the first positioning groove and the first mating structure 211 as the first protrusion as an example, when the first guide rail 210 and the first bottom wall 112 are connected by bolts, after the first protrusion is installed in the first positioning groove, the screw hole of the first guide rail 210 can be quickly aligned with the screw hole on the first bottom wall 112, thereby facilitating the rapid installation of the first guide rail 210 and the first bottom wall 112 and improving installation efficiency. In addition, when the first slider body 220 bears axial force, the first guide rail 210 will also bear part of the force. By setting the first protrusion of the first guide rail 210 to be embedded in the first positioning groove, the force can be better transmitted to the rod 100, reducing the stress on the fasteners and thus extending the service life of the equipment. The functions of the second positioning structure 123 and the second mating structure 311 are similar.
[0053] It is conceivable that the first positioning structure 113 could be configured as a first protrusion, the first mating structure 211 as a first positioning groove, the second positioning structure 123 as a second protrusion, and the second mating structure 311 as a second positioning groove. In this embodiment, no limitation is made.
[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine the different embodiments or examples described in this specification.
[0055] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A drill pipe retrieval tool, characterized in that, include: Rod body; The first slider assembly includes a first guide rail and a first slider body, wherein the first slider body is slidably mounted on the first guide rail, and the first guide rail is mounted on the rod body; The second slider assembly includes a second guide rail and a second slider body, wherein the second slider body is slidably mounted on the second guide rail, and the second guide rail is mounted on the rod body; The first slider assembly and the second slider assembly are arranged at intervals along the vertical direction, with the first slider assembly positioned above the second slider assembly. The first guide rail and / or the second guide rail are inclined. The first slider body is used to abut against the drill rod to withstand axial force, and the second slider body is used to abut against the drill rod to withstand radial force.
2. The drill pipe retrieval tool according to claim 1, characterized in that: The rod body is provided with a first mounting groove and a second mounting groove, and the opening directions of the first mounting groove and the second mounting groove are opposite. The first slider assembly is mounted in the first mounting slot, and the second slider assembly is mounted in the second mounting slot.
3. The drill pipe retrieval tool according to claim 2, characterized in that: The first mounting groove includes a first groove wall and a first bottom wall. The first guide rail is mounted on the first bottom wall. The first groove wall is provided with a first flushing hole, which is connected to a water supply device. The first flushing hole flushes water onto the first slider body to drive the first slider body to slide along the first guide rail.
4. The drill pipe retrieval tool according to claim 3, characterized in that: The second mounting groove includes a second groove wall and a second bottom wall, the second guide rail is mounted on the second bottom wall, and the rod body is provided with a second flushing hole, which communicates with the first flushing hole; The second flushing hole flushes water onto the second slider body to drive the second slider body to slide along the second guide rail.
5. The drill pipe retrieval tool according to claim 4, characterized in that: The outer peripheral wall of the rod is provided with a water groove, which is connected to the second flushing hole, and the second flushing hole flushes water to the second slider body through the water groove.
6. The drill pipe retrieval tool according to claim 2, characterized in that: The first mounting slot is provided with a first positioning structure, and the first guide rail is provided with a first mating structure. The first positioning structure corresponds to the first mating structure to pre-position the first guide rail. And / or, the second mounting groove is provided with a second positioning structure, and the second guide rail is provided with a second mating structure, the second positioning structure corresponding to the second mating structure, so as to pre-position the second guide rail.
7. The drill pipe retrieval tool according to claim 2, characterized in that: The first mounting groove also includes a support surface, and the first slider body is provided with a second abutting surface. The support surface can be in contact with the second abutting surface to support the first slider body.
8. The drill pipe retrieval tool according to claim 1, characterized in that: The upper surface of the first slider body is provided with a first abutting surface at the connection between the upper surface and the outer peripheral surface, and the first abutting surface is used to abut against the drill rod.
9. The drill pipe retrieval tool according to claim 1, characterized in that: The first slider body is provided with a first slot for mounting the first guide rail, and the first slot is a T-shaped slot.
10. The drill pipe retrieval tool according to claim 1, characterized in that: The second slider body is provided with a second slot for mounting the second guide rail, and the second slot is a dovetail groove.