Expansion type inner hook overshot
By using an expandable inner hook retrieval cylinder design, the elastic anti-splitting seam expands the inner diameter and the inner hook teeth stabilize the cable, solving the problem of low efficiency in downhole cable retrieval by traditional retrieval tools and achieving a high-efficiency and low-cost cable retrieval effect.
Patent Information
- Application Number
- CN202520307509.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Traditional retrieval tools are inefficient, costly, and difficult to secure when retrieving cables from underground wells. They are particularly unsuitable for use in the special environments of underground wells, and cables are prone to falling off, increasing operation time and costs.
An expandable inner hook retrieval cylinder is designed, comprising a connector, a cylinder body, an elastic anti-splitting seam, and inner hook teeth. The elastic anti-splitting seam expands the inner diameter under external force, and the inner hook teeth prevent the cable from slipping out, thus achieving stable cable retrieval.
It improves the efficiency of cable retrieval, reduces operating costs and labor intensity, enhances the stability of the cable inside the retrieval cylinder, and reduces the risk of the cable falling.
Smart Images
Figure CN223724560U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oilfield operation equipment field, concretely relates to a kind of expansion type inner hook fishing barrel. BACKGROUND
[0002] When carrying out oilfield downhole operation, staff often uses fishing tool to fish downhole pipe, rod and rope and other drop objects, and among various drop objects, the cable of downhole electric pump is particularly difficult to fish, on the one hand, because traditional fishing tools, such as outer hook, inner hook and tiger mouth, are mostly self-processed, and the arrangement and number of hook teeth are indefinite, making the application of fishing tool in downhole special environment less targeted and the fishing efficiency lower, on the other hand, because the cable is usually in a spiral state of accumulation and compaction in the oilfield downhole, it is more difficult to fish using traditional fishing tools, and the cable is very easy to fall off, even cannot be taken out, etc., thus greatly reducing the working efficiency of staff fishing cable, and also increasing the time period of occupying well, further increasing operation cost. SUMMARY
[0003] In view of the defects of the prior art described above, the technical problem to be solved by the utility model is to provide an expansion type inner hook fishing barrel, which can improve the working efficiency of staff fishing cable, reduce fishing operation cost and labor intensity of staff.
[0004] To achieve the above purpose, the utility model provides an expansion type inner hook fishing barrel, which comprises a connecting head, a fishing barrel body, a plurality of elastic anti-split joints and a plurality of inner hook teeth, the two ends of the fishing barrel body are a connecting end with fixed inner diameter and a fishing end with expandable inner diameter, the connecting head is connected with the connecting end of the fishing barrel body, the plurality of elastic anti-split joints are arranged on the side wall at the fishing end of the fishing barrel body, and are uniformly arranged along the circumference of the fishing barrel body, and one end of each elastic anti-split joint extends to the end face of the fishing end of the fishing barrel body, the tail end of each inner hook tooth is connected to the inner wall at the fishing end of the fishing barrel body, and the head end of each inner hook tooth faces the connecting end of the fishing barrel body.
[0005] Further, the elastic anti-split joint is provided with three, and is arranged on the side wall at the fishing end of the fishing barrel body, and is uniformly arranged along the circumference of the fishing barrel body.
[0006] Further, the length extension direction of the elastic anti-split joint is parallel to the axis direction of the fishing barrel body.
[0007] As described above, the expansion type inner hook fishing barrel disclosed by the utility model has the following beneficial effects:
[0008] By setting up an elastic anti-splitting joint, the inner diameter of the retrieval end of the retrieval cylinder body can be expanded under the action of external force, making it easier for the cable to enter the inner cavity of the retrieval cylinder body. By setting up internal hook teeth, the cable entering the inner cavity of the retrieval cylinder body can be prevented from slipping out from the retrieval end. Through the expansion-type internal hook retrieval cylinder, the work efficiency of the staff in retrieving cables can be greatly improved, and the cost of retrieval operations and the labor intensity of the staff can be reduced. Attached Figure Description
[0009] Fig. 1 This is a schematic diagram of the structure of the expandable inner hook scooping cylinder in this utility model.
[0010] Fig. 2 This is a schematic diagram of the elastic anti-splitting joint in this utility model.
[0011] Explanation of icon numbers
[0012] 1. Connector, 2. Scoop body, 3. Elastic anti-splitting joint, 4. Inner hook teeth. Detailed Implementation
[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.
[0014] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not 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 on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0016] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0017] SeeFigs. 1-2 The utility model provides a kind of expansion type inner hook fishing barrel, including connector 1, fishing barrel body 2, multiple elastic anti-splitting joints 3 and multiple inner hook teeth 4, the both ends of fishing barrel body 2 are fixed inner diameter connection end and inner diameter can expand fishing end respectively, connector 1 is connected with the connection end of fishing barrel body 2, multiple elastic anti-splitting joints 3 are all set on the side wall at fishing barrel body 2 fishing end, and multiple elastic anti-splitting joints 3 are evenly set along the circumference of fishing barrel body 2, and one end of multiple elastic anti-splitting joints 3 is extended to the end face of fishing barrel body 2 fishing end, and the tail end of multiple inner hook teeth 4 is all connected on the inner wall at fishing barrel body 2 fishing end, and the head of multiple inner hook teeth 4 is all towards the connection end of fishing barrel body 2.
[0018] The basic working principle of the expansion type inner hook fishing barrel of the utility model is as follows: when fishing the cable located in the well, the expansion type inner hook fishing barrel is placed in the well, specifically, the fishing end of the fishing barrel body 2 is located below the connection end, so that the fishing end can be in contact with the cable in the well. By arranging the elastic anti-splitting joints 3, the inner diameter of the fishing end of the fishing barrel body 2 can be expanded under the action of external force. When the cable is pressed against the end face of the fishing end, the elastic anti-splitting joints 3 can open the side wall of the fishing barrel body 2 under the action of the cable pressure, thereby expanding the inner diameter of the fishing barrel body 2, so that the cable can enter the inner cavity of the fishing barrel body 2. At this time, the elastic anti-splitting joints 3 are in an elastic energy storage state, and the cable continuously moves along the inner cavity of the fishing barrel body 2 towards the connection end, so that the cable can be maximally entered into the fishing barrel body 2. By arranging the inner hook teeth 4, the cable entering the inner cavity of the fishing barrel body 2 can be prevented from sliding out of the fishing end. During the process of fishing the cable, the cable can be further fixed on the inner hook teeth 4 under the action of its gravity, thereby further improving the stability of the cable in the inner cavity of the fishing barrel body 2. When the fishing of the cable is completed, the cable is pulled out of the inner cavity of the fishing barrel body 2, and the elastic anti-splitting joints 3 can automatically reset under the action of their elasticity, that is, the inner diameter of the fishing end is automatically reset.
[0019] Referring to Figs. 1-2 The utility model will be further described below with one specific embodiment:
[0020] In the embodiment, referring to Fig. 2 As a preferred design, the elastic anti-splitting joints 3 are arranged in three, and are arranged on the side wall at the fishing end of the fishing barrel body 2 and are evenly arranged along the circumference of the fishing barrel body 2. While ensuring the strength of the side wall of the fishing barrel body 2, the expansion speed of the inner diameter of the fishing end of the fishing barrel body 2 can be further ensured, and the part of the cable exposed to the side wall of the fishing barrel body 2 can be reduced.
[0021] In the embodiment, referring to Fig. 2As a preferred design, the length extension direction of the elastic anti-splitting seam 3 is parallel to the axis direction of the barrel body 2, so that the fishing end of the barrel body 2 can be expanded in the inner diameter.
[0022] From the above, the expansion type inner hooking barrel has the following beneficial effects:
[0023] Through the elastic anti-splitting seam 3, the inner diameter of the fishing end of the barrel body 2 can be expanded under the action of external force, so that the cable can enter the inner cavity of the barrel body 2. Through the inner hooking teeth 4, the cable in the inner cavity of the barrel body 2 can be prevented from sliding out of the fishing end. Through the expansion type inner hooking barrel, the working efficiency of the staff in fishing the cable can be greatly improved, and the fishing operation cost and the labor intensity of the staff can be reduced.
[0024] In summary, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
[0025] The above embodiments only exemplarily illustrate the principles and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.
Claims
1. An expanding inner hooking bail, characterized by: The fishing tool comprises a connecting head (1), a fishing barrel body (2), a plurality of elastic anti-splitting grooves (3) and a plurality of inner hook teeth (4), the two ends of the fishing barrel body (2) are respectively a connecting end with fixed inner diameter and a fishing end with expandable inner diameter, the connecting head (1) is connected with the connecting end of the fishing barrel body (2), the plurality of elastic anti-splitting grooves (3) are arranged on the side wall of the fishing end of the fishing barrel body (2), the plurality of elastic anti-splitting grooves (3) are uniformly arranged along the circumferential direction of the fishing barrel body (2), one end of the plurality of elastic anti-splitting grooves (3) extends to the end face of the fishing end of the fishing barrel body (2), and the tail ends of the plurality of inner hook teeth (4) are connected with the inner wall of the fishing end of the fishing barrel body (2), and the head ends of the plurality of inner hook teeth (4) are towards the connecting end of the fishing barrel body (2).
2. The expanding inner hook bailer of claim 1, wherein: The elastic anti-splitting grooves (3) are three in number and are arranged on the side wall of the fishing end of the fishing barrel body (2) and are uniformly arranged along the circumferential direction of the fishing barrel body (2).
3. The expanding inner hook bailer of claim 1, wherein: The length extension direction of the elastic anti-splitting grooves (3) is parallel to the axial direction of the fishing barrel body (2).