Monitoring well fisher

Abstract

The invention relates to the technical field of monitoring well fishers, in particular to a monitoring well fisher which comprises an annular fishing body, a fishing rod assembly, a secondary correction mechanism and a hoisting assembly. The fishing rod assembly comprises a plurality of fishing rods hinged to the outer wall of the annular fishing body; a primary correction part inclining towards the axis direction of the annular fishing body is arranged at the free end of the fishing rod, the liquid driving part is arranged on the primary correction part and connected with the secondary correction part through a pipeline, and the lifting assembly comprises a driven lifting part arranged in the annular fishing body and a driving lifting part arranged in the driven lifting part. The driven hoisting piece is connected with the fishing rod, and the driving hoisting piece is connected with the liquid driving piece, so that when the secondary correction piece is expanded after being filled with water, the sampling barrel is further limited on the axis, the sampling barrel is further clamped by the primary correction part in an auxiliary manner, and secondary falling of the sampling barrel during upward fishing is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring well fishing tools, and particularly relates to a monitoring well fishing tool. Background Art

[0002] A monitoring well is a facility used to obtain representative groundwater data, which may include groundwater level, hydraulic conductivity, and groundwater sample analysis data, etc., and helps to understand the groundwater condition. Currently, in the daily work of relevant monitoring wells, when sampling the water quality of the monitoring well, it often happens that the sampling cylinder or a piece of the wellhead falls off, resulting in the obstruction of the monitoring operation.

[0003] To solve the above problems, for example, the prior art application number: CN202120652672.6 discloses a monitoring well fishing tool, which includes a driving rod, a support frame, a fixed pulley, and a fishing claw. The driving rods are evenly distributed around the circumference of the support frame, the support frame can slide up and down along the driving rod, the fishing claw is pivotally connected to the bottom of the driving rod and the support frame, a connector is provided at the top end of the driving rod, and the fixed pulley is fixed at the top end of the support frame, and a steel wire rope is wound around the fixed pulley. It clamps and fishes the object that has fallen into the well through the fishing claw at the bottom. In fact, there are still the following technical deficiencies: the objects falling into the well are often inclined or stuck, and traditional fishing tools (such as slip type, triangular piece type, and fishing claw) have poor adaptability and are difficult to align with the central axis of the fallen object, resulting in the deviation of the clamping force and the failure of fishing. Summary of the Invention

[0004] To solve the above problems, the present invention provides a monitoring well fishing tool, which includes an annular fishing body, a fishing rod assembly, a secondary correction mechanism, and a lifting assembly. The fishing rod assembly includes several fishing rods hinged on the outer wall of the annular fishing body. The free end of the fishing rod is provided with a primary correction part inclined towards the axis direction of the annular fishing body. The secondary correction mechanism includes a secondary correction piece arranged between two primary correction parts, and also includes a liquid driving piece arranged on the primary correction part. The liquid driving piece is connected to the secondary correction piece through a pipeline. The lifting assembly includes a driven lifting piece arranged in the annular fishing body and a driving lifting piece arranged in the driven lifting piece. The driven lifting piece is connected to the fishing rod, and the driving lifting piece is connected to the liquid driving piece. The driving lifting piece is located inside the driven lifting piece. When the driving lifting piece expands the liquid driving piece through its lifting action, the driven lifting piece follows the driving lifting piece to complete the clamping action on the fishing rod.

[0005] As a further preference, a number of articulated seats are annularly arrayed on the circular outer wall of the annular fishing body, and a fishing rod is correspondingly articulated on each articulated seat. A hanging portion is provided on the fishing rod, and a first flexible connecting member is connected to the hanging portion. The other end of the first flexible connecting member extends into the annular fishing body from the bottom of the annular fishing body and is connected to the bottom of the driven lifting member.

[0006] As a further preference, the liquid driving member includes a piston cavity opened in the primary rectifying portion and a piston rod disposed in the piston cavity. An absorption hole communicating with the piston cavity is opened from the outside to the inside of the primary rectifying portion. The liquid driving member is connected to the primary rectifying portion through a pipeline and communicates with the piston cavity. A second flexible connecting member is connected to the piston rod.

[0007] As a further preference, the secondary rectifying member is an irregular water sac. The secondary rectifying member is connected to the primary rectifying portion through a corrugated connecting pipe. When the secondary rectifying member is in a compressed state, the corrugated connecting pipe becomes shorter, causing the other end of the secondary rectifying member to droop. The other end of the second flexible connecting member passes to the outside of the primary rectifying portion, extends into the annular fishing body from the bottom of the annular fishing body, and is connected to the bottom of the driving lifting member.

[0008] As a further preference, the bottom end of the piston rod is exposed to the bottom end of the primary rectifying portion and is provided with a tapered portion that gradually tapers downward.

[0009] As a further preference, a gap is formed between the primary rectifying portions of the two fishing rods. The liquid driving member is arc-shaped and is located on the same side of the primary rectifying portion when in a compressed state. When the liquid driving member expands, it intercepts inside the gap.

[0010] As a further preference, a circular plate is connected to the bottom end of the driven lifting member. The middle of the circular plate communicates with the annular fishing body, and the first flexible connecting member is connected to the circular plate.

[0011] As a further preference, an outer guide groove is opened on the annular fishing body. The outer wall of the driven lifting member is slidably fitted on the inner wall of the annular fishing body. Vertical upward lifting lugs are provided on both sides of the driven lifting member. Guide rods that are slidably fitted in the outer guide groove are provided on the outer walls of the lifting lugs. An inner guide groove that is vertically upward is opened on the lifting lugs. Guide blocks are rotatably connected to both ends of the driving lifting member, and the two guide blocks are slidably fitted in the two guide grooves.

[0012] As a further preference, the driving lifting member is provided with an arc-shaped bending portion. The second flexible connecting member is connected to a position near the guide block of the arc-shaped bending portion. When the arc-shaped bending portion rotates inward, it is received in the annular fishing body.

[0013] The beneficial effects of the present invention compared with the prior art are: 1. When the sampling cylinder falls off, it will pass through the common inner cavity of the annular fishing body, the active lifting member, and the driven lifting member and fall to the bottom of the well. The wall of the sampling cylinder will be restricted on the axis of the inspection well by several fishing rods and the primary correction parts at their bottoms, which is equivalent to restricting the sampling cylinder on the axis of the common inner cavity of the annular fishing body, the active lifting member, and the driven lifting member. Moreover, the secondary correction part will also assist the fishing rods in restricting the sampling cylinder on the axis of the common inner cavity of the annular fishing body, the active lifting member, and the driven lifting member in the radial direction. During the extraction operation, the driven lifting member drags the fishing rods upward, and the fishing rods also deflect towards the axis direction to further clamp the sampling cylinder. As the active lifting member continues to drag upward, the dragging force of the driven lifting member on the fishing rods gradually increases until the sampling cylinder is fished out of the well.

[0014] 2. When the sampling cylinder drops, it is corrected by the fishing rods, the primary correction parts, and the secondary correction part. Especially the setting of the secondary correction part not only ensures that the water sample enters the sampling position but also assists the primary correction part to prevent the sampling cylinder from tilting and deviating from the clamping range. Especially when the secondary correction part expands by filling with water, in addition to further restricting the sampling cylinder on the axis, it also assists the primary correction part to further clamp the sampling cylinder to prevent the sampling cylinder from falling off again when it is fished upward. Description of the Drawings

[0015] Figure 1 It is a three-dimensional schematic diagram of a monitoring well fishing device provided by an embodiment of the present invention; Figure 2 It is a monitoring well fishing device provided by an embodiment of the present invention Figure 1 The schematic plan view drawn therefrom; Figure 3 It is a monitoring well fishing device provided by an embodiment of the present invention Figure 1 The schematic diagram from another perspective drawn therefrom; Figure 4 It is a schematic diagram of a monitoring well fishing device provided by an embodiment of the present invention from another perspective and viewing the liquid driving part after cutting open one of the primary correction parts; Figure 5 It is a schematic diagram of a monitoring well fishing device provided by an embodiment of the present invention after only the lifting assembly is disassembled.

[0016] In the figure: 10, annular fishing body; 101, hinge seat; 102, outer guide groove; 20, fishing rod assembly; 210, fishing rod; 2101, hanging part; 220, primary correction part; 2201, first flexible connecting piece; 2202, gap; 30, secondary correction mechanism; 310, secondary correction piece; 320, liquid driving piece; 3201, piston chamber; 3202, piston rod; 3203, absorption hole; 3204, conical thorn part; 40, lifting assembly; 410, driven lifting piece; 4101, annular plate; 4102, lifting lug; 4103, guide rod; 4104, inner guide groove; 420, driving lifting piece; 4201, second flexible connecting piece; 4202, guide block; 4203, arc bending part. Detailed implementation mode

[0017] The following will clearly and completely describe the above and other implementation modes and advantages of the present invention with reference to the accompanying drawings. Obviously, the described implementation modes are only part of the implementation modes of the present invention, rather than all implementation modes.

[0018] In one implementation mode, as Figures 1-5 shown: This implementation mode provides a monitoring well fishing tool, which includes an annular fishing body 10, a fishing rod assembly 20, a secondary correction mechanism 30 and a lifting assembly 40. The fishing rod assembly 20 includes a plurality of fishing rods 210 hinged on the outer wall of the annular fishing body 10. The free end of the fishing rod 210 is provided with a primary correction part 220 inclined towards the axis direction of the annular fishing body 10. The secondary correction mechanism 30 includes a secondary correction piece 310 arranged between two primary correction parts 220, and also includes a liquid driving piece 320 arranged on the primary correction part 220. The liquid driving piece 320 is connected to the secondary correction piece 310 through a pipeline. The lifting assembly 40 includes a driven lifting piece 410 arranged in the annular fishing body 10 and a driving lifting piece 420 arranged in the driven lifting piece 410. The driven lifting piece 410 is connected to the fishing rod 210, and the driving lifting piece 420 is connected to the liquid driving piece 320. The driving lifting piece 420 is located in the driven lifting piece 410. When the driving lifting piece 420 expands the secondary correction piece 310, the driven lifting piece 410 follows the driving lifting piece 420 to complete the clamping action on the fishing rod 210.

[0019] In use, the annular fishing body 10 is lowered along the well wall to the bottom of the well for standby. The primary correction part 220 at the bottom end of the fishing rod 210 is inserted to the bottom of the well. Before placing the fishing device, a lifting rope is connected to the active lifting member 420, and the entire fishing device is lowered to the bottom of the well through the lifting rope, with the other end of the well rope extending outside the well. For example, when a tester uses a sampling cylinder to take a water sample from the well, once the sampling cylinder falls off, the sampling cylinder will pass through the common inner cavity of the annular fishing body 10, the active lifting member 420, and the driven lifting member 410 and fall to the bottom of the well. At this time, due to the structure of this fishing device, the barrel wall of the sampling cylinder will be restricted on the axis of the inspection well by these fishing rods 210 around the well wall and the primary correction part 220 at the bottom ends of these fishing rods 210, which is equivalent to restricting the sampling cylinder on the axis of the common inner cavity of the annular fishing body 10, the active lifting member 420, and the driven lifting member 410. Moreover, the secondary correction member 310 will also assist the fishing rod 210 in restricting the sampling cylinder on the axis of the common inner cavity of the annular fishing body 10, the active lifting member 420, and the driven lifting member 410 in the radial direction. Fishing process: Lift the lifting rope, drag the active lifting member 420 upward from the bottom end of the lifting rope, drag the liquid driving member 320 by the active lifting member 420, and through the hydraulic action generated by the liquid driving member 320 in the primary correction part 220, extract a part of the water body from the well water and suck it into the secondary correction member 310. As the lifting rope continues to be lifted, the water absorption capacity of the liquid driving member 320 gradually increases, and due to the connection relationship between the secondary correction member 310 and the primary correction part 220 through the corrugated connecting pipe, after the secondary correction member 310 absorbs water, it will radially expand in the axial direction, which is equivalent to having a plurality of clamping bodies around the sampling cylinder that gradually become larger towards the barrel wall direction, so as to squeeze the sampling cylinder to correct and clamp it in the axial direction. By continuing to drag the active lifting member 420 upward through the lifting rope, drag the driven lifting member 410 upward by the active lifting member 420, drag the fishing rod 210 upward by the driven lifting member 410, and the fishing rod 210 also deflects in the axial direction to complete further clamping of the sampling cylinder. And as the active lifting member 420 continues to be dragged upward, the dragging force of the driven lifting member 410 on the fishing rod 210 gradually increases until the sampling cylinder is fished out of the well. When the sampling cylinder falls, it is corrected by the fishing rod 210, the primary correction part 220, and the secondary correction member 310. Especially the setting of the secondary correction member 310 not only ensures that the water sample enters the sampling position but also assists the primary correction part 220 to prevent the sampling cylinder from tilting and deviating from the clamping range. Especially when the secondary correction member 310 expands after being filled with water, in addition to further restricting the sampling cylinder on the axis, it also assists the primary correction part 220 to further clamp the sampling cylinder to prevent the sampling cylinder from falling off again when being fished upward. The primary correction part 220 is used as the installation part of the liquid driving member 320, and well water is used as the liquid, which is used as the driving medium of the liquid driving member 320 to make the secondary correction member 310 produce an expansion effect and clamp the lost sampling cylinder, saving power.

[0020] The annular fishing body 10, the active lifting member 420, and the driven lifting member 410 are placed at the bottom of the well together with the entire fishing device, and they have a common cavity that communicates up and down. Therefore, during normal use, it will not affect the water sampling cylinder to obtain water samples. Compared with the prior art, the common cavity formed by them leaves a fishing and correction space in advance for the possible detachment of the water sampling cylinder, which is superior to the prior art.

[0021] It should be further noted that when the secondary correction member 310 is located at the bottom of the well and is not dragged upward, since the liquid driving member 320 does not act, the secondary correction member 310 droops inside the primary correction portion 220 where it is located. And at this time, the secondary correction member 310 will not expand (become flat) because it is not injected with water by the liquid driving member 320. Therefore, it will not completely block the gap between the two primary correction portions 220. Even if the fishing device is placed at the bottom of the well in advance, it will not affect the water body from entering the water sampling range of the water sampling cylinder due to the existence of the secondary correction member 310.

[0022] It should be further noted that in addition to assisting the fishing rod 210 to limit the water sampling cylinder on the axis of the inspection well, the setting of the secondary correction member 310 also forms a blocking effect between the two primary correction portions 220 by the secondary correction member 310. However, this blocking effect will not completely close the gap between the two primary correction portions 220, but still leave a gap 2202 between the two primary correction portions 220. The well water can still enter the water storage space surrounded by all the primary correction portions 220 through the gap 2202. When the water sampling cylinder is lowered from this water storage space to the bottom of the well, it can still obtain water samples. Only when the water sampling cylinder falls off at the bottom of the well for fishing, in order to correct the water sampling cylinder to the clamping position of the primary correction portion 220, through the above-mentioned fishing method, the secondary correction member 310 expands and completely closes the gap between the two primary correction portions 220, increasing the friction force to assist the primary correction portion 220 to lift the water sampling cylinder.

[0023] A plurality of hinged seats 101 are installed in a circular array on the circular outer wall of the annular salvage body 10, and a corresponding salvage rod 210 is hinged on each hinged seat 101. The salvage rod 210 is provided with a hanging portion 2101, and the hanging portion 2101 is connected to a first flexible connector 2201. The other end of the first flexible connector 2201 extends from the bottom of the annular salvage body 10 into the annular salvage body 10 and is connected to the bottom of the driven lifting member 410. The hanging portion 2101 can be understood as a hanging hole opened on the salvage rod 210, or a lifting ring welded on the salvage rod 210. These salvage rods 210 are arranged in a circle. When they are put into the bottom of the well for standby, a circumferential range is formed along the depth of the well wall. The circumferential range is communicated with the internal common cavity of the annular salvage body 10, the active lifting member 420 and the driven lifting member 410. When sampling, the sampling tube reaches the bottom of the well along their common cavity to complete the water sampling. When the sampling tube falls off, it will be located in the common cavity in a nearly vertical state under the restriction of these salvage rods 210. These salvage rods 210 are simultaneously swung toward the axis direction of the detection well under the drag of the first flexible connector 2201. The primary correction portion 220 at the bottom of these salvage rods 210 is clamped on the sampling tube at the same time, so that the circumferential surface of the sampling tube is evenly stressed, which is convenient for extraction.

[0024] The liquid driving member 320 includes a piston chamber 3201 opened in the primary correction part 220, and a piston rod 3202 arranged in the piston chamber 3201. An absorption hole 3203 communicating with the piston chamber 3201 is opened from the outside of the primary correction part 220 to the inside. The pipeline of the liquid driving member 320 is connected to the primary correction part 220 and communicates with the piston chamber 3201. The piston rod 3202 is connected to a second flexible connecting member 4201. The other end of the second flexible connecting member 4201 passes through the outside of the primary correction part 220, extends from the bottom of the annular salvage body 10 into the annular salvage body 10, and is connected to the bottom of the active lifting member 420.

[0025] The bottom end of the driven lifting member 410 is connected with an annular plate 4101, the middle part of the annular plate 4101 is in communication with the annular salvage body 10, and the first flexible connector 2201 is connected to the annular plate 4101. The annular plate 4101 is provided so that the top ends of the first flexible connectors 2201 are evenly connected to each stress point of the driven lifting member 410. For example, when there are four salvage rods 210 as shown in the figure, they are evenly distributed at 90 degrees in the circumferential direction, and the corresponding first flexible connectors 2201 are also four evenly distributed at 90 degrees. When the driven lifting member 410 is in salvage action, it is ensured that the four salvage rods 210 are evenly stressed, and after being deflected at the same time, the sampling tube is tightly held by the four primary correction parts 220 and the secondary correction parts 310 on the four primary correction parts 220.

[0026] An outer guide groove 102 is provided on the annular salvage body 10, and the outer wall of the driven lifting member 410 is slidably fitted on the inner wall of the annular salvage body 10. Vertically upward lifting ears 4102 are provided on both sides of the driven lifting member 410, and guide rods 4103 that are slidably fitted in the outer guide groove 102 are provided on the outer walls of the lifting ears 4102, so that the driven lifting member 410 is positioned in the circumferential direction, and the driven lifting member 410 is prevented from rotating freely during the salvage operation; a vertically upward inner guide groove 4104 is provided on the lifting ears 4102, and guide blocks 4202 are transferred at both ends of the active lifting member 420, and the two guide blocks 4202 are slidably fitted in the two inner guide grooves 4104; so that the active lifting member 420 is positioned in the circumferential direction, and the active lifting member 420 is prevented from rotating freely during the salvage operation. During the salvage operation, the active lifting member 420 is first pulled upward, and the active lifting member 420 with the guide blocks 4202 at both ends rises along the inner guide grooves 4104 on both sides of the driven lifting member 410. At the same time, the active lifting member 420 drags the second flexible connecting member 4201 upward, and the second flexible connecting member 4201 drags the liquid driving member 320 upward to absorb the expansion of the secondary correction member 310. When the guide blocks 4202 at both ends of the active lifting member 420 reach the top of the two inner guide grooves 4104, The two lifting ears 4102 are driven to rise, and the two lifting ears 4102 drag the driven lifting member 410 upward, and the driven lifting member 410 drags the first flexible connecting member 2201 upward, and the first flexible connecting member 2201 drags the salvage rod 210, and the salvage rod 210 drives the primary correction part 220 at the bottom and the secondary correction part 310 on the primary correction part 220 to complete the clamping of the sampling tube, and continues to drag upward with the active lifting member 420 until the entire salvage device and the sampling tube are taken out of the well. The clamping force of the primary corrective part 220 due to the deflection of the salvage rod 210 gradually increases. At the same time, the force exerted by the primary corrective part 220 on the secondary corrective part 310 will also gradually increase. The shape of the primary corrective part 220 is not limited to the cylindrical shape in the figure, but can also be a flat tube to increase the clamping force on the sampling tube. As the clamping force increases, the secondary corrective part 310 will release the deformation surface in the circumferential direction, and finally the secondary corrective part 310 will fill the gap 2202 between the two primary corrective parts 220 as much as possible, so that the secondary corrective part 310 assists the primary corrective part 220 to further improve the correction effect and salvage effect of the sampling tube.

[0027] The active lifting member 420 is provided with an arc-shaped bending portion 4203, and the second flexible connecting member 4201 is connected to the position of the arc-shaped bending portion 4203 close to the guide block 4202. When the arc-shaped bending portion 4203 rotates inward, it is stored in the annular salvage body 10. For example, the active lifting member 420 is provided with two arc-shaped bending portions 4203, and their two ends are bent again and respectively transferred to the two guide blocks 4202. The top of the second flexible connecting member 4201 is provided in two groups, one group is connected to one active lifting member 420, and the other group is connected to the other active lifting member 420. The inner walls of the two guide blocks 4202 are welded with limiting plates. When the two active lifting members 420 are rotated downward for storage, the bending parts at both ends of the two active lifting members fall on the limiting plates, and they are limited in the annular salvage body 10 by the limiting plates. The inside of the annular salvage body 10, at this time, the two active lifting members 420 form a circle, the interior of which is communicated with the annular salvage body 10 and the annular plate 4101, and will not cause any obstruction to the sampling of the sampling tube. In actual use, the well rope is connected to the middle position of the arc-shaped bending parts 4203 of the two active lifting members 420. When the well rope is lifted upward, the two arc-shaped bending parts 4203 carry the two active lifting members 420 to rotate upward to verticality, and then as the lifting height gradually increases, the guide blocks 4202 at both ends of the active lifting members 420 reach the top of the inner guide groove 4104, and the active lifting members 420 are dragged through the top of the inner guide groove 4104 until the entire salvage device and the sampling tube clamped at the bottom of the salvage device are taken out of the well through the active lifting members 420.

[0028] The active lifting parts 420 are symmetrical and have concentrated force, ensuring that the liquid driving parts 320 in each primary correction part 220 of the annular array are lifted at the same time, ensuring that the secondary correction parts 310 inside each primary correction part 220 of the annular array are expanded at the same time to quickly correct the fallen sampling tube to an axis that is easy to grab. The active lifting parts 420 are stored in the driven lifting parts 410, saving space. The active lifting parts 420 are designed in an arc shape, and deflect into the active lifting parts 420 when not lifting. When used under normal conditions, they will not affect the lowering of the sampling tube to the bottom of the well for sampling.

[0029] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0030] The specific embodiments described above further elaborate on the object of the invention, the technical solutions, and the beneficial effects of the present invention. It should be understood that the above description is only for the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. In particular, it is pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A monitoring well fishing tool, characterized in that, It includes an annular fishing body (10), a fishing rod assembly (20), a secondary correction mechanism (30) and a lifting assembly (40). The fishing rod assembly (20) includes a plurality of fishing rods (210) hinged to the outer wall of the annular fishing body (10). The free end of the fishing rod (210) is provided with a primary correction portion (220) inclined towards the axis direction of the annular fishing body (10). The secondary correction mechanism (30) includes a secondary correction member (310) arranged between two primary correction portions (220), and also includes a liquid driving member (320) arranged on the primary correction portion (220). The liquid driving member (320) is connected to the secondary correction member (310) through a pipeline. The lifting assembly (40) includes a driven lifting member (410) arranged inside the annular fishing body (10) and a driving lifting member (420) arranged inside the driven lifting member (410). The driven lifting member (410) is connected to the fishing rod (210), and the driving lifting member (420) is connected to the liquid driving member (320). The driving lifting member (420) is located inside the driven lifting member (410). When the driving lifting member (420) expands the secondary correction member (310) through its lifting action, the driven lifting member (410) follows the driving lifting member (420) to complete the clamping action on the fishing rod (210).

2. The monitoring well fishing tool according to claim 1, characterized in that, A plurality of hinge seats (101) are annularly arranged on the circular outer wall of the annular fishing body (10). Each of the hinge seats (101) is correspondingly hinged with a fishing rod (210). A hanging portion (2101) is arranged on the fishing rod (210), and a first flexible connecting member (2201) is connected to the hanging portion (2101). The other end of the first flexible connecting member (2201) extends into the annular fishing body (10) from the bottom of the annular fishing body (10) and is connected to the bottom of the driven lifting member (410).

3. The monitoring well fishing tool according to claim 2, characterized in that, The liquid driving member (320) includes a piston chamber (3201) opened in the primary correction portion (220), and a piston rod (3202) arranged in the piston chamber (3201). An absorption hole (3203) communicating with the piston chamber (3201) is opened from the outside to the inside of the primary correction portion (220). The liquid driving member (320) is connected to the primary correction portion (220) through a pipeline and communicates with the piston chamber (3201). A second flexible connecting member (4201) is connected to the piston rod (3202).

4. The monitoring well fishing tool according to claim 3, characterized in that, The secondary correction member (310) is an irregular water bag. The secondary correction member (310) is connected to the primary correction portion (220) through a corrugated connecting pipe. When the secondary correction member (310) is in a compressed state, the corrugated connecting pipe becomes shorter, causing the secondary correction member (310) to droop. The other end of the second flexible connecting member (4201) passes to the outside of the primary correction portion (220), extends into the annular fishing body (10) from the bottom of the annular fishing body (10), and is connected to the bottom of the driving lifting member (420).

5. The monitor well fishing tool according to claim 4, wherein, The bottom end of the piston rod (3202) is exposed to the bottom end of the primary correction portion (220) and is provided with a tapered thorn portion (3204) that gradually tapers downward.

6. The monitoring well fishing tool according to claim 5, characterized in that, A gap (2202) is formed between the primary correction portions (220) of the two fishing rods (210). When the liquid driving member (320) is in an arc-shaped and compressed state, it is located on the same side of the primary correction portion (220), and when the liquid driving member (320) expands, it intercepts inside the gap (2202).

7. The monitoring well fishing tool according to claim 6, characterized in that, A ring plate (4101) is connected to the bottom end of the driven lifting member (410). The middle of the ring plate (4101) communicates with the ring-shaped fishing body (10), and the first flexible connecting member (2201) is connected to the ring plate (4101).

8. The monitoring well fishing tool according to claim 7, characterized in that, An outer guide groove (102) is formed in the ring-shaped fishing body (10). The outer wall of the driven lifting member (410) is slidably fitted on the inner wall of the ring-shaped fishing body (10). Vertical upward lifting lugs (4102) are provided on both sides of the driven lifting member (410). Guide rods (4103) that are slidably fitted in the outer guide groove (102) are provided on the outer walls of the lifting lugs (4102). Inner guide grooves (4104) that are vertically upward are formed in the lifting lugs (4102). Guide blocks (4202) are rotatably connected to both ends of the driving lifting member (420), and the two guide blocks (4202) are slidably fitted in the two inner guide grooves (4104).

9. The monitoring well fishing tool according to claim 8, wherein, The driving lifting member (420) is provided with an arc-shaped bending portion (4203). The second flexible connecting member (4201) is connected to a position of the arc-shaped bending portion (4203) close to the guide block (4202). When the arc-shaped bending portion (4203) rotates inward, it is received inside the ring-shaped fishing body (10).

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