Automatic positioning and locking structure of fishing spear

Abstract

The utility model relates to the technical field of fishing spears, and provides an automatic positioning and locking structure of a fishing spear. The notches are formed in the four corners of the surface of the spearhead mounting part; the positioning shafts are fixedly mounted on the inner walls of the notches, and the outer surfaces of the positioning shafts are sleeved with L-shaped connecting rods through bearings. When the rubber sealing box makes contact with a part in a well, the rubber sealing box continues to move downwards to make the rubber sealing box make contact with the sensing element, and therefore signals are transmitted to a data control platform, positioning work is conducted, an electric push rod is started to work, a push block moves upwards, and an arc-shaped block in an arc-shaped groove is driven to slide; the arc-shaped blocks are limited through the limiting rings, the L-shaped connecting rods on the surfaces of the sliding rods are made to obliquely work with the positioning shafts as fixed points, and therefore one ends of the multiple L-shaped connecting rods are close to one another to clamp objects.

Description

Technical Field

[0001] This utility model relates to the field of salvage spear technology, and in particular to an automatic positioning and locking structure for salvage spears. Background Technology

[0002] A retrieval spear is a retrieval tool that can retrieve objects with internal holes, such as drill pipes, tubing, casing, and liners. During well workover, if downhole tubing, liners, or other objects break, become dislodged, or get stuck, they will hinder the normal operation of the workover. Therefore, it is necessary to use a retrieval spear to sink into the fault point, reverse the stuck objects, and retrieve them.

[0003] In existing technologies, some retrieval spears cannot accurately predict the fault point when used downhole. Therefore, when the retrieval spearhead moves, it is easy to come into contact with the object at the fault point, causing it to shift again and affecting subsequent positioning work. In addition, the retrieval spear is prone to wear and tear on its parts after long-term use, so solutions are needed. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art: when some retrieval spears are used underground, the fault point cannot be accurately predicted. Therefore, when the retrieval spear head moves, it is easy to come into contact with the object at the fault point, causing it to move again and affecting the subsequent positioning work. In addition, the retrieval spear is prone to wear and tear of parts when used for a long time.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an automatic positioning and locking structure for a retrieval spear, comprising: a spearhead mounting part; multiple slots formed at the four corners of the surface of the spearhead mounting part; and further comprising:

[0006] Multiple positioning shafts are fixedly installed on the inner walls of multiple slots, and L-shaped connecting rods are sleeved on the outer surfaces of the multiple positioning shafts.

[0007] Multiple sliding rods are arranged on one end surface of the multiple L-shaped connecting rods, and an arc-shaped block is fixedly arranged on one end surface of the multiple sliding rods;

[0008] Multiple mounting slots are formed on the surfaces of the multiple L-shaped connecting rods;

[0009] A sealing gasket is detachably installed on the inner wall of the spearhead mounting part. An electric push rod is provided on one side of the inner wall of the spearhead mounting part, and the output end of the electric push rod is slidably embedded inside the sealing gasket.

[0010] Preferably, the output end surface of the electric push rod is provided with a push block, and the surface of the push block is provided with an arc-shaped groove.

[0011] The technical effect of adopting the above-mentioned further solution is that when the electric push rod is working, it drives the push block to slide, and the arc-shaped groove opened on the surface facilitates the movement of the internal parts.

[0012] Preferably, the arc-shaped groove is slidably fitted onto the surface of the arc-shaped block, and a limit ring is provided on the surface of the arc-shaped groove at a symmetrical location.

[0013] The technical effect of adopting the above-mentioned further solution is that when the arc groove moves, it drives the internal arc block to tilt, and at the same time, the limiting ring provides a limiting function for the arc block.

[0014] Preferably, a rubber sealing box is provided on one side surface of the push block, and a sensing element is provided inside the rubber sealing box.

[0015] The technical effect of adopting the above-mentioned further solution is that the rubber sealing box on the surface of the pusher block facilitates contact with the object when moving inside the well. When moving further down, the rubber sealing box contacts the sensing element, transmitting the signal to the control center and stopping the downward movement.

[0016] Preferably, clamping claws are slidably provided inside the plurality of mounting slots, and positioning holes are provided on the surface of the plurality of clamping claws.

[0017] The technical effect of adopting the above-mentioned further solution is that the clamping claw is installed through the mounting slot, and the clamping claw surface is provided with positioning holes to facilitate positioning.

[0018] Preferably, the surface of the plurality of positioning holes away from the L-shaped connecting rod is provided with an anti-slip pad, and the surface of the plurality of L-shaped connecting rods is provided with a protective box.

[0019] The technical effect of adopting the above-mentioned further solution is that the anti-slip pad on the surface of the positioning hole provides anti-slip force for the clamped item, while the L-shaped connecting rod provides fixation for the protective box and protects the parts.

[0020] Preferably, a spring is provided on one side surface of the plurality of L-shaped connecting rods, and a pull plate is provided on one end surface of the plurality of springs.

[0021] The technical effect of adopting the above-mentioned further solution is that by connecting the two ends of the spring to the positioning hole and the surface of the pull plate respectively, a restoring force is provided to the pull plate.

[0022] Preferably, the surfaces of the plurality of pull plates at symmetrical locations are provided with positioning pins, and one end of the plurality of positioning pins is movably embedded inside the positioning hole.

[0023] The technical effect of adopting the above-mentioned further solution is that the positioning pin on the surface of the pull plate is embedded in the positioning hole to provide a limiting function for the clamping claw.

[0024] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0025] 1. In this utility model, the spearhead mounting part is installed on the spear body for retrieval work in the well. The electric push rod is sealed by the sealing gasket. When the rubber sealing box contacts the parts in the well, it continues to move downward so that the rubber sealing box contacts the sensing element, thereby transmitting the signal to the data control platform for positioning. The electric push rod is then started to work, causing the push block to move upward and drive the arc block inside the arc groove to slide. The limiting ring provides a limit to the arc block, allowing the L-shaped connecting rod on the surface of the slide rod to tilt around the positioning axis as a fixed point, thereby bringing one end of multiple L-shaped connecting rods closer to each other to clamp the object.

[0026] 2. In this utility model, the spring is protected by a protective box, and the two ends of the spring are respectively connected to the positioning hole and the surface of the pull plate to provide a restoring force to the pull plate. When the pull plate is pulled, the positioning pin moves along the inside of the positioning hole, which facilitates the disassembly and replacement of the clamping claw along the inside of the mounting groove. The anti-slip pad on the surface provides anti-slip for the clamped items. Attached Figure Description

[0027] Figure 1 A side view of the automatic positioning and locking structure for a retrieval spear is provided for this utility model.

[0028] Figure 2 This utility model provides a partially unfolded structural diagram of an automatic positioning and locking structure for a salvage spear.

[0029] Figure 3 This utility model provides a cross-sectional structural diagram of an automatic positioning and locking structure for a retrieval spear.

[0030] Figure 4 This utility model proposes an automatic positioning and locking structure for retrieval spears. Figure 3 Enlarged structural diagram at point A in the middle.

[0031] Legend:

[0032] 1. Spearhead mounting section; 1011. Groove; 1012. Positioning shaft; 1013. L-shaped connecting rod; 1014. Slide rod; 1015. Arc-shaped block; 1016. Mounting groove; 102. Sealing gasket; 103. Clamping claw; 1031. Positioning hole; 1032. Anti-slip pad; 104. Pull plate; 1041. Spring; 1042. Positioning pin; 105. Protective box; 2. Electric push rod; 201. Push block; 202. Arc-shaped groove; 203. Limiting ring; 204. Rubber sealing box; 205. Sensing element. Detailed Implementation

[0033] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0035] Example 1, as Figures 1 to 4 As shown, this utility model provides an automatic positioning and locking structure for a retrieval spear, including: a spearhead mounting part 1; multiple slots 1011 formed at the four corners of the surface of the spearhead mounting part 1; and multiple positioning shafts 1012 fixedly mounted on the inner walls of the multiple slots 1011, with L-shaped connecting rods 1013 bearing sleeves on the outer surfaces of the multiple positioning shafts 1012; multiple sliding rods 1014 set on one end surface of the multiple L-shaped connecting rods 1013, with arc-shaped blocks 1015 fixedly set on one end surface of the multiple sliding rods 1014; multiple mounting grooves 1016 formed on the surfaces of the multiple L-shaped connecting rods 1013; and a sealing gasket 102 detachably mounted on the inner wall of the spearhead mounting part 1, with an electric push rod 2 provided on one side of the inner wall of the spearhead mounting part 1, the output end of the electric push rod 2 slidably embedded inside the sealing gasket 102.

[0036] In this embodiment, the spearhead mounting part 1 is installed on the spear body for retrieval work in the well. The sealing gasket 102 provides a seal for the electric push rod 2. When the rubber sealing box 204 contacts the parts in the well, it continues to move downward so that the rubber sealing box 204 contacts the sensing element 205, thereby transmitting the signal to the data control platform for positioning. The electric push rod 2 is then activated, causing the push block 201 to move upward, which drives the arc block 1015 inside the arc groove 202 to slide. The limiting ring 203 provides a limit for the arc block 1015, allowing the L-shaped connecting rod 1013 on the surface of the slide rod 1014 to tilt around the positioning shaft 1012, thereby bringing one end of the multiple L-shaped connecting rods 1013 closer together to clamp the object.

[0037] In Example 2, a push block 201 is provided on the output end surface of the electric push rod 2. An arc-shaped groove 202 is formed on the surface of the push block 201. The arc-shaped groove 202 is slidably fitted onto the surface of the arc-shaped block 1015. Limiting rings 203 are provided on the surface of the symmetrical part of the arc-shaped groove 202. A rubber sealing box 204 is provided on one side surface of the push block 201. A sensing element 205 is provided inside the rubber sealing box 204. Clamping claws 103 are slidably provided inside the multiple mounting slots 1016. The surfaces of the multiple clamping claws 103 are formed with... There are positioning holes 1031. On the side surface of the multiple positioning holes 1031 away from the L-shaped connecting rod 1013, there is an anti-slip pad 1032. On one side surface of the multiple L-shaped connecting rod 1013, there is a protective box 105. On one side surface of the multiple L-shaped connecting rod 1013, there is a spring 1041. On one end surface of the multiple springs 1041, there is a pull plate 104. On the symmetrical surface of the multiple pull plates 104, there are positioning pins 1042. One end of the multiple positioning pins 1042 is movably embedded in the interior of the positioning hole 1031.

[0038] In this embodiment, the protective box 105 provides protection for the spring 1041. The two ends of the spring 1041 are respectively connected to the positioning hole 1031 and the surface of the pull plate 104, providing a restoring force to the pull plate 104. When the pull plate 104 is pulled, the positioning pin 1042 moves along the inside of the positioning hole 1031, which facilitates the disassembly and replacement of the clamping claw 103 along the inside of the mounting groove 1016. The anti-slip pad 1032 on the surface provides anti-slip for the clamped items.

[0039] Working principle: In use, the spearhead mounting part 1 is installed on the spear body for downhole retrieval. The sealing gasket 102 provides a seal for the electric push rod 2. When the rubber sealing box 204 contacts the parts inside the well, it continues to move downwards until the rubber sealing box 204 contacts the sensing element 205, thereby transmitting a signal to the data control platform for positioning. The electric push rod 2 is then activated, causing the push block 201 to move upwards, driving the arc block 1015 inside the arc groove 202 to slide. The limiting ring 203 provides a limit to the arc block 1015, allowing the L-shaped connecting rod 101 on the surface of the slide rod 1014 to slide. 3. The tilting operation is performed with the positioning shaft 1012 as the fixed point, so that one end of multiple L-shaped connecting rods 1013 approaches each other to clamp the item. In addition, the protective box 105 provides protection for the spring 1041. The two ends of the spring 1041 are respectively connected to the positioning hole 1031 and the surface of the pull plate 104, providing a restoring force to the pull plate 104. When the pull plate 104 is pulled, the positioning pin 1042 moves along the inside of the positioning hole 1031, which facilitates the disassembly and replacement of the clamping claw 103 along the inside of the mounting groove 1016. The anti-slip pad 1032 on the surface provides anti-slip for the clamped item.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An automatic positioning and locking structure for a retrieval spear, comprising: Spearhead mounting part (1); Multiple slots (1011) are formed at the four corners of the surface of the spearhead mounting portion (1); characterized in that it further includes: Multiple positioning shafts (1012) are fixedly installed on the inner walls of multiple slots (1011), and L-shaped connecting rods (1013) are sleeved on the outer surface bearings of the multiple positioning shafts (1012). Multiple slide rods (1014) are disposed on one end surface of multiple L-shaped connecting rods (1013), and an arc-shaped block (1015) is fixedly disposed on one end surface of multiple slide rods (1014). Multiple mounting slots (1016) are formed on the surface of multiple L-shaped connecting rods (1013); A sealing gasket (102) is detachably installed on the inner wall of the spearhead mounting part (1). An electric push rod (2) is provided on one side of the inner wall of the spearhead mounting part (1). The output end of the electric push rod (2) is slidably embedded in the inside of the sealing gasket (102).

2. The automatic positioning and locking structure for a retrieval spear according to claim 1, characterized in that: The output end surface of the electric push rod (2) is provided with a push block (201), and the surface of the push block (201) is provided with an arc groove (202).

3. The automatic positioning and locking structure for a retrieval spear according to claim 2, characterized in that: The arc groove (202) is slidably sleeved on the surface of the arc block (1015), and a limit ring (203) is provided on the surface of the arc groove (202) at the symmetrical part.

4. The automatic positioning and locking structure for a retrieval spear according to claim 3, characterized in that: A rubber sealing box (204) is provided on one side surface of the push block (201), and a sensing element (205) is provided inside the rubber sealing box (204).

5. The automatic positioning and locking structure for a retrieval spear according to claim 1, characterized in that: The mounting slots (1016) are equipped with slidable clamping claws (103), and the surfaces of the clamping claws (103) are provided with positioning holes (1031).

6. The automatic positioning and locking structure for a retrieval spear according to claim 5, characterized in that: An anti-slip pad (1032) is provided on the side surface of the plurality of positioning holes (1031) away from the L-shaped connecting rod (1013), and a protective box (105) is provided on the side surface of the plurality of L-shaped connecting rods (1013).

7. The automatic positioning and locking structure for a retrieval spear according to claim 6, characterized in that: A spring (1041) is provided on one side surface of the plurality of L-shaped connecting rods (1013), and a pull plate (104) is provided on one end surface of the plurality of springs (1041).

8. The automatic positioning and locking structure for a retrieval spear according to claim 7, characterized in that: Positioning pins (1042) are provided on the surfaces of the plurality of pull plates (104) at symmetrical locations, and one end of the plurality of positioning pins (1042) is movably embedded in the interior of the positioning hole (1031).

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