Self-sliding underground fishing tool

Abstract

The utility model relates to a self-sliding type underground fishing tool which comprises an outer cylinder, a fixing mechanism is arranged on the outer side of the outer cylinder, a positioning mechanism is arranged in the outer cylinder, and an inner cylinder is arranged in the outer cylinder. According to the self-sliding type underground fishing tool, when a mushroom head of a fished underground appliance enters an inner cylinder, two hinge rods on the upper side start to push two hinge plates to start to turn over respectively, so that two trapezoidal pieces on the lower side are clamped into the inner cylinder, and at the moment, two electromagnetic plates make contact with two magnetic attraction blocks respectively and magnetically attract the two magnetic attraction blocks; at the moment, the fished downhole tool can be fished through connection of the hanging ring and an external steel rope, the purposes of naturally jacking the fished downhole tool, conveniently limiting the fished downhole tool and facilitating fishing are achieved, the purpose of preventing the fished downhole tool from being impacted is achieved, and the beneficial effect that a mushroom head of the fished tool is prevented from being hit and deformed is achieved; the problem that a mushroom head of a fished appliance is hit and deformed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of downhole fishing tools, in particular to a self-sliding downhole fishing tool. Background Art

[0002] Downhole salvage tools are special salvage tools used for oil and water wells, such as water distributors, production distributors, plugs, etc. Because the salvaged downhole equipment is affected by scaling, corrosion, sand jams and other factors, the salvage tools may fall off or get stuck, so there is a problem that the salvage tools cannot be dropped.

[0003] Currently, the commonly used salvage tool is the slip type, which requires squatting to introduce the downhole equipment, but it is easy to collide with the mushroom head of the equipment, and there is a problem that the mushroom head of the salvaged equipment is deformed by the impact. It is very inconvenient to disassemble the salvaged downhole equipment and the salvage head on the ground. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a self-sliding downhole fishing tool, which has the advantage of preventing the mushroom head of the fishing tool from being deformed by being hit, thereby solving the problem of the mushroom head of the fishing tool being deformed by being hit.

[0005] To achieve the above object, the utility model provides the following technical solution: a self-sliding downhole fishing tool, comprising an outer cylinder, a fixing mechanism is provided on the outer side of the outer cylinder, a positioning mechanism is provided inside the outer cylinder, and an inner cylinder is provided inside the outer cylinder;

[0006] The fixing mechanism comprises a connecting seat fixed on the left side of the outer cylinder, the internal thread of the connecting seat is connected with a stud, the left side of the stud is fixed with a connecting column, the left side of the connecting column is rotatably connected with a connecting block through a bearing, the left side of the connecting block is fixed with an articulated seat, the interior of the articulated seat is articulated with an articulated plate, the right side of the articulated plate is slidably connected with two slides, the right sides of the two slides are both articulated with articulated rods through articulated shafts, and the right sides of the two articulated rods are both slidably connected with trapezoidal members;

[0007] The positioning mechanism includes a compression spring fixed to the inner top wall of the outer cylinder, a telescopic rod is fixed to the inner top wall of the outer cylinder, a movable plate is fixed to the bottom end of the telescopic rod, two mounting columns are fixed to the upper surface of the movable plate, magnetic blocks are fixed to the top ends of the two mounting columns, and two electromagnetic plates are fixed to the inner top wall of the outer cylinder.

[0008] Furthermore, a counterweight cylinder is fixed to the top of the outer cylinder, and a lifting ring is fixed to the top of the counterweight cylinder.

[0009] Furthermore, two slide grooves are provided on the right side of the hinged plate, and the two slide plates are slidably connected inside the two slide grooves respectively.

[0010] Furthermore, an empty slot is opened on the left side of the two trapezoidal members, elastic members are fixed to the right side walls of the inner cavities of the two empty slots, and the two hinge rods are respectively fixed to the left sides of the two elastic members.

[0011] Furthermore, two sliding grooves penetrating through and extending to the inner cavity of the outer cylinder are provided on the left side thereof, and positioning blocks horizontally slidably connected to the sliding grooves are fixed on the front and rear sides of the two trapezoidal members.

[0012] Furthermore, the number of the fixing mechanisms is two, and the two fixing mechanisms are symmetrically distributed with respect to each other on the left and right sides with the central axis of the outer cylinder as the symmetry line.

[0013] Furthermore, the compression spring is sleeved on the outside of the telescopic rod, the compression spring is fixed on the upper surface of the movable plate, the two magnetic blocks are electromagnetically connected to the two electromagnetic plates respectively, and the inner cylinder is fixed on the lower surface of the movable plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The self-sliding downhole salvage tool, when the mushroom head of the downhole tool to be salvaged enters the inner tube, the two upper hinged rods start to push the two hinged plates to flip respectively, so that the two lower trapezoidal parts are stuck in the inner tube. At this time, the two electromagnetic plates are respectively in contact with and magnetically attracted to the two magnetic blocks. At this time, the downhole tool to be salvaged can be connected with the external steel rope through the lifting ring to salvage, so as to achieve the purpose of naturally lifting the downhole tool to be salvaged and facilitating the limitation of the downhole tool to be salvaged, and avoiding the purpose of impact on the downhole tool to be salvaged.

[0016] 2. The self-sliding downhole salvage tool disconnects the two electromagnetic plates from the two magnetic blocks respectively. At this time, the movable plate starts to move downward due to the reset of the compression spring. At the same time, the left and right connecting columns are rotated to separate the left and right connecting columns from the inside of the left and right connecting seats. At this time, the downhole salvage tool can be removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the fixing mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the positioning mechanism of the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the inner cylinder structure of the utility model.

[0021] In the figure: 1 outer cylinder, 2 fixing mechanism, 201 connecting seat, 202 stud, 203 connecting column, 204 connecting block, 205 hinged plate, 206 slide plate, 207 hinged rod, 208 trapezoidal member, 3 counterweight cylinder, 4 positioning mechanism, 401 compression spring, 402 telescopic rod, 403 moving plate, 404 mounting column, 405 electromagnetic plate, 5 lifting ring, 6 inner cylinder. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 A self-sliding downhole fishing tool in this embodiment includes an outer tube 1, a fixing mechanism 2 is provided on the outside of the outer tube 1, a positioning mechanism 4 is provided inside the outer tube 1, and an inner tube 6 is provided inside the outer tube 1.

[0024] A counterweight cylinder 3 is fixed to the top of the outer cylinder 1 , and a lifting ring 5 is fixed to the top of the counterweight cylinder 3 .

[0025] See also Figure 2 In order to prevent the downhole equipment from being impacted, the fixing mechanism 2 in this embodiment includes a connecting seat 201 fixed to the left side of the outer tube 1, the internal thread of the connecting seat 201 is connected to a stud 202, a connecting column 203 is fixed to the left side of the stud 202, the left side of the connecting column 203 is rotatably connected to a connecting block 204 through a bearing, the left side of the connecting block 204 is fixed to a hinge seat, the interior of the hinge seat is hingedly connected to a hinge plate 205, the right side of the hinge plate 205 is slidably connected to two slides 206, the right sides of the two slides 206 are hinged to hinge rods 207 through hinge shafts, and the right sides of the two hinge rods 207 are slidably connected to trapezoidal members 208.

[0026] In this example, there are two fixing mechanisms 2, which are symmetrically distributed on the left and right sides with the central axis of the outer cylinder 1 as the symmetry line. The left and right sides of the inner cylinder 6 are provided with fixing grooves that engage with the two trapezoidal members 208 on the lower side. Two sliding grooves are provided on the right side of the hinged plate 205. The two slide plates 206 are respectively slidably connected to the inside of the two sliding grooves. An empty groove is provided on the left side of the two trapezoidal members 208. Elastic members are fixed to the right side walls of the inner cavities of the two empty grooves. Two hinged rods 207 are respectively fixed to the left sides of the two elastic members. Two sliding grooves that penetrate and extend to the inner cavity of the outer cylinder 1 are provided on the left side. Positioning blocks that are horizontally slidably connected to the sliding grooves are fixed on the front and rear sides of the two trapezoidal members 208.

[0027] It should be noted that when the mushroom head of the downhole tool to be salvaged enters the interior of the inner tube 6, the two upper hinge rods 207 begin to push the two hinge plates 205 to flip over, so that the two lower trapezoidal parts 208 are stuck in the interior of the inner tube 6. At this time, the two electromagnetic plates 405 are in contact with and magnetically attracted to the two magnetic blocks respectively. At this time, the downhole tool to be salvaged can be connected to the external steel rope through the lifting ring 5, thereby achieving the purpose of naturally lifting the downhole tool to be salvaged and limiting the downhole tool to facilitate salvage, and avoiding the purpose of impact on the downhole tool to be salvaged.

[0028] See also Figure 3-4 In order to remove the downhole tool, the positioning mechanism 4 in this embodiment includes a compression spring 401 fixed to the inner top wall of the outer tube 1, a telescopic rod 402 is fixed to the inner top wall of the outer tube 1, and a moving plate 403 is fixed to the bottom end of the telescopic rod 402. The mushroom head of the downhole tool enters the interior of the inner tube 6 and pushes the moving plate 403 to move upward. Two mounting columns 404 are fixed on the upper surface of the moving plate 403. When the moving plate 403 moves upward, the compression spring 401 begins to compress. At this time, the moving plate 403 3 continues to move upward and pushes the two trapezoidal members 208 on the upper side to move in opposite directions. At this time, the two hinged rods 207 on the upper side start to push the two hinged plates 205 to start turning over, so that the two trapezoidal members 208 on the lower side are stuck into the inner tube 6. The top ends of the two mounting columns 404 are fixed with magnetic blocks, and the inner top wall of the outer tube 1 is fixed with two electromagnetic plates 405. When the two electromagnetic plates 405 are respectively in contact with the two magnetic blocks and are magnetically attracted, the downhole equipment can be connected to the external steel rope through the lifting ring 5 to be salvaged.

[0029] In this example, the compression spring 401 is sleeved on the outside of the telescopic rod 402, and the compression spring 401 is fixed on the upper surface of the movable plate 403. The two magnetic blocks are electromagnetically connected to the two electromagnetic plates 405 respectively, and the inner tube 6 is fixed on the lower surface of the movable plate 403. When the salvaged downhole equipment needs to be removed after salvage, the two electromagnetic plates 405 are powered off from the two magnetic blocks respectively. At this time, the movable plate 403 starts to push the movable plate 403 downward due to the resetting of the compression spring 401. At the same time, by rotating the left and right connecting columns 203, the left and right connecting columns 203 are separated from the inside of the left and right connecting seats 201. At this time, the salvaged downhole equipment can be removed.

[0030] It should be noted that, the two electromagnetic plates 405 are de-energized from the two magnetic blocks respectively. At this time, the movable plate 403 begins to move downward due to the resetting of the compression spring 401. At the same time, the left and right connecting columns 203 are rotated to separate from the inside of the left and right connecting seats 201. At this time, the downhole equipment can be removed.

[0031] It can be understood that the electrical components appearing in the text are all electrically connected to the main controller and the power supply and the electrical components appearing in the text are all conventionally known devices, and this application will not go into too much detail. The main controller can be a conventionally known device that plays a control role for a computer, etc. The control circuit of the main controller can be realized by simple programming by technicians in this field, and the provision of power supply is also common knowledge in this field. In addition, the utility model is mainly used to protect mechanical devices, so the utility model will not explain the control method and circuit connection in detail. At the same time, the parts not described in detail in the utility model are all common knowledge to technicians in this field.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0033] The working principle of the above embodiment is:

[0034] (1) When the self-sliding downhole salvage tool is needed for salvage, the mushroom head of the downhole tool to be salvaged enters the inner tube 6 and pushes the movable plate 403 to move upward, causing the compression spring 401 to begin to compress. At this time, the movable plate 403 continues to move upward and pushes the two trapezoidal members 208 on the upper side to move away from each other. At this time, the two hinged rods 207 on the upper side begin to push the two hinged plates 205 to start flipping, causing the two trapezoidal members 208 on the lower side to be stuck into the inner tube 6. At this time, the two electromagnetic plates 405 are respectively in contact with the two magnetic blocks and are magnetically attracted. At this time, the downhole tool to be salvaged can be connected to the external steel rope through the lifting ring 5 for salvage.

[0035] (2) When the downhole equipment needs to be removed after salvage, the two electromagnetic plates 405 are de-energized from the two magnetic blocks respectively. At this time, the movable plate 403 begins to move downward due to the reset of the compression spring 401. At the same time, the left and right connecting columns 203 are rotated to separate the left and right connecting seats 201 from the inside. At this time, the downhole equipment can be removed.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A self-sliding downhole fishing tool, comprising an outer cylinder (1), characterized in that: A fixing mechanism (2) is provided on the outside of the outer cylinder (1), a positioning mechanism (4) is provided inside the outer cylinder (1), and an inner cylinder (6) is provided inside the outer cylinder (1); The fixing mechanism (2) comprises a connecting seat (201) fixed to the left side of the outer cylinder (1); a stud (202) is connected to the inner thread of the connecting seat (201); a connecting column (203) is fixed to the left side of the stud (202); a connecting block (204) is rotatably connected to the left side of the connecting column (203) via a bearing; a hinge seat is fixed to the left side of the connecting block (204); a hinge plate (205) is hingedly connected to the inner side of the hinge seat; two slide plates (206) are slidably connected to the right side of the hinge plate (205); the right sides of the two slide plates (206) are hingedly connected to hinge rods (207) via hinge shafts; and the right sides of the two hinge rods (207) are slidably connected to trapezoidal members (208); The positioning mechanism (4) comprises a compression spring (401) fixed to the inner top wall of the outer cylinder (1); a telescopic rod (402) is fixed to the inner top wall of the outer cylinder (1); a movable plate (403) is fixed to the bottom end of the telescopic rod (402); two mounting columns (404) are fixed to the upper surface of the movable plate (403); magnetic blocks are fixed to the top ends of the two mounting columns (404); and two electromagnetic plates (405) are fixed to the inner top wall of the outer cylinder (1).

2. A self-sliding downhole fishing tool according to claim 1, characterized in that: A counterweight cylinder (3) is fixed to the top end of the outer cylinder (1), and a lifting ring (5) is fixed to the top end of the counterweight cylinder (3).

3. A self-sliding downhole fishing tool according to claim 1, characterized in that: Two slide grooves are provided on the right side of the hinged plate (205), and the two slide plates (206) are slidably connected inside the two slide grooves respectively.

4. A self-sliding downhole fishing tool according to claim 1, characterized in that: The left sides of the two trapezoidal members (208) are provided with hollow grooves, the right side walls of the inner cavities of the two hollow grooves are both fixed with elastic members, and the two hinge rods (207) are respectively fixed on the left sides of the two elastic members.

5. The self-sliding downhole fishing tool according to claim 1, characterized in that: The left side of the outer cylinder (1) is provided with two sliding grooves penetrating through and extending to the inner cavity thereof, and positioning blocks horizontally slidably connected to the sliding grooves are fixed on the front and rear sides of the two trapezoidal members (208).

6. A self-sliding downhole fishing tool according to claim 1, characterized in that: The number of the fixing mechanisms (2) is two, and the two fixing mechanisms (2) are symmetrically distributed with respect to each other on the left and right sides with the central axis of the outer cylinder (1) as the symmetry line.

7. The self-sliding downhole fishing tool according to claim 1, characterized in that: The compression spring (401) is sleeved on the outside of the telescopic rod (402), the compression spring (401) is fixed on the upper surface of the movable plate (403), the two magnetic blocks are electromagnetically connected to the two electromagnetic plates (405) respectively, and the inner cylinder (6) is fixed on the lower surface of the movable plate (403).

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