Detachable fishing spearhead eccentric centralizer

Abstract

The utility model relates to the technical field of exploration and drilling equipment, in particular to a detachable fishing spearhead eccentric centralizer, which comprises a fixing component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component, a connecting component and a connecting component, the connecting component is used with the connecting component, and the connecting component is arranged in the connecting component; the centralizing assembly comprises a fishing spear head matched with the clamping piece for use, a mounting groove formed in the bottom end of the pipe body and a centralizer arranged on the mounting groove; the removing assembly comprises a cone arranged in the connecting pipe and a guide end arranged at the top end of the cone, and the removing assembly is provided with a fixing assembly and a clamping piece so that the fishing spearhead can be locked and fixed; the centralizing assembly is arranged, the inner wall of the centralizer is arranged to be an inclined face, the fishing spearhead is centralized accordingly, and the fishing spearhead is locked in cooperation with the clamping piece; and by arranging the moving-out assembly, the locked fishing spearhead can be taken out.

Description

Technical Field

[0001] The utility model relates to the technical field of exploration drilling equipment, in particular to a detachable fishing head eccentric centralizer. Background Art

[0002] A fishing head is a fishing tool used in drilling engineering, mainly for wireline coring drill tools. It usually consists of multiple components, including a fishing hook, a weight, a safety rope, etc. Its main function is to, during the drilling process, when the inner tube is filled with core samples, take out the inner tube from the hole through a fishing device; specifically, the fishing device slides down along the inside of the drill pipe to the bottom of the hole, automatically locks the fishing head of the core drill tool, and then uses a wire rope to pull out the fishing device and the inner tube together; the design of the fishing head can ensure reliability and flexibility during the fishing process, and it is an economical and convenient tool in the drilling field.

[0003] For existing fishing tools, the inner diameter of the drill pipe is 78.10 mm, the outer diameter of the fishing device is 70.1 mm, and the gap between the two is 8 mm. This will cause the fishing head to lean against the inner wall of the drill pipe eccentrically. Moreover, the outer diameter of the fishing device is too small and the gap between the two is too large. When the fishing hook goes to grab the fishing head, it will instead smash the fishing head tighter, making it impossible to conveniently straighten and lock the fishing head. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the description of this application, to avoid obscuring the purpose of this part, the abstract of the description, and the title of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problem of being unable to conveniently straighten and lock the fishing head, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a detachable fishing head eccentric centralizer.

[0007] To solve the above technical problems, the present utility model provides the following technical solution: A detachable fishing head eccentric centralizer, comprising: a fixing component, including a pipe body, a connecting pipe used in conjunction with the pipe body, a pin provided in the pipe body, and a clamping member provided on the pin;

[0008] A centralizing component, including a fishing head used in conjunction with the clamping member, a mounting groove opened at the bottom end of the pipe body, and a centralizer provided on the mounting groove;

[0009] A removing component, including a cone provided in the connecting pipe, and a guiding end provided at the top end of the cone.

[0010] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: the clamping member includes fishing hooks symmetrically arranged on the bolt, cylinders arranged on the two fishing hooks, and a spring arranged between the two cylinders.

[0011] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: the distance between the bottom ends of the two fishing hooks is less than the distance between the top ends, and the bottom ends of the two fishing hooks are provided with inclined surfaces that slope upward, and the cylinders are located at the tops of the opposite surfaces of the two fishing hooks.

[0012] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: the top end of the fishing spear is conical, the outer wall of the bottom end is provided with an inclined surface, the middle part is cylindrical, and the height of the cylindrical part is the same as the height of the opposite surface of the bottom ends of the two fishing hooks.

[0013] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: the top of the opposite surface of the bottom ends of the two fishing hooks is in contact with the bottom end of the conical top of the fishing spear, and the length of the centralizer is less than that of the fishing spear.

[0014] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: the outer wall of the top end of the centralizer is provided with threads, and the inner wall of the centralizer is provided with an inclined surface, and the slope of the inclined surface is between 50 and 80 degrees.

[0015] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: an extension block is provided at the bottom end of the cone, and the shape of the guiding end is semi-circular.

[0016] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: an installation frame is fixedly connected to the top end inner wall of the pipe body, one end of the installation frame is fixedly connected to the extension block, and the extension block is threadedly connected to the cone.

[0017] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: the size of the installation frame is smaller than that of the bolt, through grooves are opened on both sides of the connecting pipe, the size of the through grooves is the same as that of the bolt, and they are located directly above the bolt.

[0018] As a preferred embodiment of the detachable fishing spear eccentric centralizer of the present utility model, wherein: the outer wall of the connecting pipe is provided with threads, and the length of the connecting pipe is less than that of the pipe body.

[0019] The beneficial effects of the utility model are as follows: the utility model can lock and fix the spear head by providing a fixing component and a clamping piece; by providing a straightening component, the inner wall of the straightener is set as an inclined surface, so that when the straightener contacts the spear head, the gap between them is only 0.01mm, so that the spear head can be tightly attached to the inner wall of the straightener and can cut in from the outermost edge of the straightener, and the inclined surface of the inner wall of the straightener can be used to straighten the spear head, and the clamping piece can be used to lock the spear head; by providing a removal component, the locked spear head can be taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The present invention is an overall schematic diagram of a detachable spearhead eccentric centralizer.

[0022] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure.

[0023] Figure 3 It is a schematic diagram of the structure of the clamping part.

[0024] Figure 4 It is a schematic diagram of the structure after the centralizer is removed from the installation groove. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Next, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of description, the cross-sectional views showing the device structure will be locally enlarged in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0029] Embodiment 1

[0030] Refer to Figure 1 - Figure 4 , which is the first embodiment of the present utility model. This embodiment provides a detachable fishing spear eccentric centralizer, including a fixing assembly 100, which includes a pipe body 101, a connecting pipe 102 used in conjunction with the pipe body 101, a pin 103 inserted into the pipe body 101, and a clamping member 104 provided on the pin 103. The fishing spear 201 can be fixed and locked by the clamping member 104;

[0031] A centralizing assembly 200, which includes a fishing spear 201 used in conjunction with the clamping member 104, an installation groove 202 opened at the bottom end of the pipe body 101, and a centralizer 203 threadedly installed on the installation groove 202;

[0032] A removal assembly 300, which includes a cone 301 provided in the connecting pipe 102 and a guiding end 302 provided at the top end of the cone 301.

[0033] Specifically, the clamping member 104 includes fishing hooks 104a symmetrically and rotatably installed on the pin 103, a cylinder 104b fixedly installed on the two fishing hooks 104a, and a spring 104c provided between the two cylinders 104b.

[0034] Furthermore, the distance between the bottom ends of the two fishing hooks 104a is less than the distance between the top ends, and the bottom ends of the two fishing hooks 104a are provided with inclined surfaces that slope upward. The cylinder 104b is located at the top of the opposite surfaces of the two fishing hooks 104a.

[0035] Operation process: After the fishing spear tip 201 is straightened, as the pipe body 101 descends, the bottoms of the two fishing hooks 104a will come into contact with the conical surface at the top of the fishing spear tip 201. Due to the setting of the conical inclined surface, when the bottoms of the two fishing hooks 104a come into contact with the top of the fishing spear tip 201 and are squeezed, the distance between the bottoms of the two fishing hooks 104a increases. The two fishing hooks 104a rotate through the pin 103, reducing the distance between the tops, and squeezing the spring 104c. After the conical part at the top of the fishing spear tip 201 passes through the distance between the two fishing hooks 104a, at this time, due to the reaction force of the spring 104c, the distance between the tops of the two fishing hooks 104a returns to its original position. Through the pin 103, the distance between the bottoms of the two fishing hooks 104a is reduced, thereby clamping the fishing spear tip 201 for fixation and locking. Then, the device is lifted upward to complete the core sampling work.

[0036] Embodiment 2

[0037] Refer to Figure 2 - Figure 4 This is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that the top of the opposite surface at the bottom of the two fishing hooks 104a comes into contact with the bottom of the conical part at the top of the fishing spear tip 201. The fishing spear tip 201 is locked by the two fishing hooks 104a. The length of the centralizer 203 is less than that of the fishing spear tip 201. The opposite surfaces at the tops of the two fishing hooks 104a are set as inclined surfaces.

[0038] Specifically, the top of the fishing spear tip 201 is conical, the outer wall at the bottom is set as an inclined surface, and the middle part is cylindrical. The height of the cylindrical part is the same as the height of the opposite surface at the bottom of the two fishing hooks 104a.

[0039] Furthermore, the outer wall at the top of the centralizer 203 is provided with threads. The inner wall of the centralizer 203 is set as an inclined surface, and the slope of the inclined surface is between 50° and 80°. The material of the centralizer 203 is high-hardness stainless steel, with an outer diameter of 77 mm, an inner diameter of 38 mm, a height of 28 mm, and the bottom edge of the outer diameter is 0.11 mm.

[0040] The remaining structures are the same as those in Embodiment 1.

[0041] Operation process: When in use, the centralizer 203 is installed by screwing it into the installation groove 202 through the thread of the outer wall, and then the tube body 101 is lowered so that the inner wall of the centralizer 203 contacts the spearhead 201, and the gap between the spearhead 201 and the inner wall of the centralizer 203 is only 0.1mm. When the bottom end of the centralizer 203 contacts the spearhead 201, the spearhead 201 can be close to the inner wall of the centralizer 203 and can cut in from the edge. The inclined surface of the inner wall of the centralizer 203 is used to straighten the spearhead 201, and the spearhead 201 is smoothly inserted between the two fishing hooks 104a to lock it, thereby completing the straightening of the spearhead 201.

[0042] Example 3

[0043] Reference Figure 2 , which is the third embodiment of the utility model. This embodiment is different from the above embodiments in that an extension block is provided at the bottom end of the cone 301, and the shape of the guiding end 302 is semicircular. After the connecting pipe 102 drops to a certain height, the top of the guiding end 302 will contact the top of the inner wall of the connecting pipe 102 to block it and prevent it from falling any further.

[0044] Specifically, a mounting frame is fixedly connected to the top of the inner wall of the tube body 101, one end of the mounting frame is fixedly connected to the extension block, the extension block and the cone 301 are threadedly connected, and the extension block and the cone 301 can be disassembled.

[0045] Furthermore, the size of the mounting frame is smaller than the latch 103, and through slots are provided on both sides of the connecting tube 102. The size of the through slots is consistent with that of the latch 103 and is located directly above the latch 103, so that the connecting tube 102 will not be blocked by the latch 103 when descending.

[0046] Furthermore, the outer wall of the connecting pipe 102 is provided with threads, the length of the connecting pipe 102 is shorter than the pipe body 101, and the rest of the structure is the same as that of the second embodiment.

[0047] Operation process: when it is necessary to unlock the spearhead 201, the connecting tube 102 is pushed downward to move the connecting tube 102 toward the inside of the tube body 101. At this time, the bottom end of the connecting tube 102 will contact the inclined surfaces at the top ends of the two fishing hooks 104a. As the connecting tube 102 descends, the two fishing hooks 104a are squeezed by the inclined surfaces and rotated by the latch 103, so that the distance between the bottom ends of the two fishing hooks 104a increases. At this time, the opposite surfaces at the top ends of the two fishing hooks 104a will also contact the extension block, and the top end of the guiding end 302 will contact the top end of the inner wall of the connecting tube 102, so that the connecting tube 102 will no longer descend, thereby allowing the spearhead 201 to be taken out, and then the connecting tube 102 will be pulled upward, and the two fishing hooks 104a will gradually return to their original positions through the reaction force of the spring 104c.

[0048] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those skilled in the art who refer to this disclosure should readily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the functions described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility model. Therefore, the present utility model is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0049] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of implementing the present utility model or those features that are not relevant to the implementation of the present utility model).

[0050] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be a routine task of design, manufacturing and production.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and all of them should be covered by the scope of the claims of the present utility model.

Claims

1. A detachable fishing spear eccentric centralizer, characterized in that: including, a fixing component (100), including a tube body (101), a connecting pipe (102) used in cooperation with the tube body (101), a plug pin (103) arranged in the tube body (101), and a clamping member (104) arranged on the plug pin (103); a centering component (200), including a fishing spear tip (201) used in cooperation with the clamping member (104), a mounting groove (202) opened at the bottom end of the tube body (101), and a centering device (203) arranged on the mounting groove (202); a removing component (300), including a cone (301) arranged in the connecting pipe (102), and a guiding end (302) arranged at the top end of the cone (301); the clamping member (104) includes fishing hooks (104a) symmetrically arranged on the plug pin (103), a cylinder (104b) arranged on the two fishing hooks (104a), and a spring (104c) arranged between the two cylinders (104b); the distance between the bottom ends of the two fishing hooks (104a) is less than the distance between the top ends, and the bottom ends of the two fishing hooks (104a) are set as inclined surfaces inclined upward, and the cylinder (104b) is located at the top of the opposite surfaces of the two fishing hooks (104a); the top end of the fishing spear tip (201) is conical, the outer wall of the bottom end is set as an inclined surface, the middle part is cylindrical, and the height of the cylindrical part is the same as the height of the opposite surfaces of the bottom ends of the two fishing hooks (104a); the top of the opposite surfaces of the bottom ends of the two fishing hooks (104a) is in contact with the bottom end of the conical top of the fishing spear tip (201), and the length of the centering device (203) is less than that of the fishing spear tip (201); the outer wall of the top end of the centering device (203) is provided with threads, and the inner wall of the centering device (203) is set as an inclined surface, and the inclination of the inclined surface is between 50 and 80 degrees; When the connecting pipe (102) is pushed downward, the top end of the guiding end (302) will contact the inner wall top end of the connecting pipe (102). After the connecting pipe (102) stops descending, the fishing spear tip (201) can be taken out.

2. The detachable fishing spear eccentric centralizer according to claim 1, wherein: the bottom end of the cone (301) is provided with an extension block, and the shape of the guiding end (302) is semicircular.

3. The detachable fishing spear eccentric centralizer according to claim 2, wherein: a mounting frame is fixedly connected to the inner wall top end of the tube body (101), one end of the mounting frame is fixedly connected to the extension block, and the extension block is in threaded connection with the cone (301).

4. The detachable fishing spear eccentric centralizer according to claim 3, characterized in that: the size of the mounting frame is smaller than that of the plug pin (103), through grooves are opened on both sides of the connecting pipe (102), the size of the through grooves is the same as that of the plug pin (103), and they are located directly above the plug pin (103).

5. The detachable fishing spear eccentric centralizer according to claim 4, characterized in that: the outer wall of the connecting pipe (102) is provided with threads, and the length of the connecting pipe (102) is less than that of the tube body (101).

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