CN116066003A - Method and system for fishing fish - Google Patents

Abstract

The application discloses a method and system for fishing a fallen fish. Among them, the method determines the initial position according to the position of the fish, controls the load acquisition module to move to the initial position, and records the first load value of the load acquisition module; controls the load acquisition module to move to the position of the fish, and collects the load The module and the fallen fish are fixed and raised to the initial position, and the second load value of the load acquisition module is recorded; according to the first load value and the second load value, the fishing result of the fallen fish is determined. The technical solution is to realize the monitoring of the load value of the load acquisition module under two conditions of no-load and load, so as to ensure the accuracy of judging the fishing result of the fallen fish.

Description

Method and system for fishing a fallen fish

technical field

The present application relates to the technical field of oil and gas engineering ground equipment manufacturing, in particular to a method and system for fishing fallen fish.

Background technique

Falling fish refers to the falling objects in the well, especially the drilling tools that fall or fall into the well due to accidents such as drilling tool breakage or drill sticking. In the construction process of oil field workover operations, it often happens that fishing work such as pipe tongs, bolts, tubing short-circuits or single tubing and other light-weight fish falls occurs.

During the construction of salvage operations, fishing tools such as fishing spears and canisters are usually used for salvage. The frictional force is also very large, and the weight of fish dropped by pipe wrench, bolts, tubing shorts or single tubing is relatively light, so when the fish is in a deep underground position, it is impossible to display the upper part of the pipe string from the workover machine. The actual weight of the fallen fish is read on the weighing scale of the pulling load, so it is impossible to determine whether the fish has been successfully salvaged. It can only be determined by taking out the salvage tool again and again to observe. If the salvage is not successful, it needs to be salvaged again. Even if it can be successfully salvaged in the end, it consumes a lot of manpower, financial resources and construction time.

Therefore, how to provide a technical solution capable of judging the fishing of fallen fish is a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

The present application provides a method and system for fishing a fallen fish, so as to monitor the load value of the load acquisition module under two conditions of no-load and load, and ensure the accuracy of judging the fishing result of the fallen fish.

According to one aspect of the present application, a method for fishing a fallen fish is provided, the method comprising:

Determine the initial position according to the position of the falling fish, control the load collection module to move to the initial position, and record the first load value of the load collection module;

controlling the load collection module to move to the position of the falling fish, fixing the load collection module and the falling fish and lifting them to the initial position, and recording the second load of the load collection module value;

A fishing result of the fallen fish is determined according to the first load value and the second load value.

According to another aspect of the present application, there is provided a system for fishing a fallen fish, which is applied to a fishing method for a fallen fish. The system includes a cable, a load acquisition module, a signal processing module, and a signal conversion module, wherein,

The cable is used to drive the load acquisition module and the signal processing module to move to a designated position;

The load collection module is configured to obtain an initial load signal collected by the tension and pressure sensor in the load collection module, and transmit the initial load signal to the signal processing module;

The signal processing module is configured to receive the initial load signal transmitted by the load acquisition module, perform enhanced processing on the initial load signal to obtain an enhanced load signal, and transmit the enhanced load signal to the cable;

The cable is also used to transmit the enhanced load signal to the signal conversion module at the wellhead;

The signal conversion module is configured to receive the enhanced load signal transmitted by the cable, convert the enhanced load signal, and determine the load value of the load acquisition module.

The technical solution provided by this application, by determining the initial position according to the position of the falling fish, controls the load collection module to move to the initial position, and records the first load value of the load collection module; controls the load collection module to move to the position of the falling fish, The load collection module and the fallen fish are fixed and raised to the initial position, and the second load value of the load collection module is recorded; according to the first load value and the second load value, the fishing result of the fallen fish is determined. The technical solution is to realize the monitoring of the load value of the load acquisition module under two conditions of no-load and load, so as to ensure the accuracy of judging the fishing result of the fallen fish.

It should be understood that what is described in this section is not intended to identify key or important features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will be easily understood from the following description.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the flow chart of a kind of falling fish salvage method that the application embodiment one provides;

Figure 2a is a schematic diagram of the first stage of a fishing process for a fallen fish provided in Example 2 of the application;

Fig. 2b is a schematic diagram of the second stage of a fish salvage process provided in Example 2 of the application;

Fig. 2c is a schematic diagram of the third stage of a fish salvage process provided in Example 2 of the application;

Fig. 2d is a schematic diagram of the fourth stage of a fishing process for a fallen fish provided in Example 2 of the application;

FIG. 3 is a schematic structural diagram of a fish fishing system provided in Embodiment 2 of the present application;

FIG. 4 is a schematic structural diagram of a load acquisition module provided in Embodiment 2 of the application;

FIG. 5 is a schematic structural diagram of a signal processing module provided in Embodiment 2 of the application;

FIG. 6 is a schematic structural diagram of a signal conversion module provided in Embodiment 2 of the application.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

It should be noted that the terms "first", "second", and "initial" in the description and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily used to describe a specific order or sequentially. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Embodiment one

FIG. 1 is a flow chart of a method for fishing a fallen fish provided in Embodiment 1 of the present application. This embodiment is applicable to the case of fishing a fallen fish with a light weight. As shown in Figure 1, the method includes:

S110. Determine an initial position according to the position of the falling fish, control the load collection module to move to the initial position, and record a first load value of the load collection module.

Wherein, the position of the fallen fish may include the depth and offset direction of the fish top of the fallen fish at the downhole position. The depth of the top of the fallen fish in the downhole can be based on the ground, and the distance from the top of the fish to the ground can be predicted based on the established downhole model or measured by measuring instruments. The offset direction of the fish top of the falling fish in the downhole position may include the inclination direction and the inclination angle of the fish top.

Wherein, the initial position may be a position where the load acquisition module is in an unloaded state.

Wherein, the first load value may be a load value measured by the load acquisition module in a no-load state.

In the embodiment of the present invention, the load acquisition module may be lowered to the initial position by controlling the drill pipe or the cable, and the first load value of the load acquisition module in the no-load state is measured.

As an optional but non-limiting implementation, determining the initial position according to the position of the falling fish includes: determining a position at a preset height above the falling fish according to the position of the falling fish and a preset height for the initial position.

Wherein, the preset height can be determined according to the geological characteristics of the well where the fish fell. For example, if the top of the falling fish is located at 510 meters downhole, and the preset height is set to 10 meters, then the initial position is 500 meters downhole.

The advantage of this setting is that it can ensure that the load value measured by the load acquisition module at the initial position is the load value in the no-load state.

As an optional but non-limiting implementation, before determining the initial position according to the position of the falling fish, the method also includes but is not limited to the following steps A1 to A2:

Step A1. Determine the height of the fallen fish to the ground based on the gauge.

Among them, the drift gauge is a detection tool for downhole operations, and is used to detect downhole conditions. In the embodiment of the present invention, the control cable can be used to drive the gauge down to detect the top of the fish, and then determine the height of the top of the fish in the wellbore relative to the ground.

Step A2. Determine the position of the fallen fish according to the height.

According to the height of the top of the fish in the borehole relative to the ground, the relative position of the fish in the coordinate system of the fish fishing system can be determined.

S120. Control the load collection module to move to the position of the falling fish, fix and lift the load collection module and the falling fish to the initial position, and record the first position of the load collection module Two loading values.

Wherein, the second load value is a load value measured by the load collection module under load conditions.

Wherein, the fixing method of the load collection module and the fish can be determined according to the type of the fishing tool in the load collection module. For example, if the fishing tool is a retractable slip overshot, the fixing method can be to use the elastic force of the slip teeth to bite and lock the falling fish; if the fishing tool is a male cone, the fixing method can be to use the male cone The threaded section on the drill pipe, oil pipe, etc. has a hole in the inner hole of the fish. If the fishing tool is a female cone, the fixing method can be to use the threaded section on the female cone to catch the fish in the drill pipe, oil pipe, etc. The outer wall is salvaged by buckle making. Of course, the embodiment of the present invention does not limit the way of fixing the load acquisition module and the fish, so it can be applied to various construction environments such as drilling open hole environment, production casing environment and oil production tubing environment.

In the embodiment of the present invention, the load acquisition module can be lowered to the place where the fish falls through the drill pipe or the cable, and the fishing tool and the fish in the load acquisition module can be fixed. When the fishing tool catches the fish, the weight of the fish The load can be transferred to the load acquisition module through the fishing tool.

As an optional but non-limiting implementation, the load collection module is controlled to move to the position of the falling fish, and the load collection module and the falling fish are fixed and lifted to the initial position. position, and record the second load value of the load acquisition module, including but not limited to the following steps B1 to B3:

Step B1, the control cable is lowered, and the load acquisition module is driven by the cable to move to the position where the fish falls.

Since the lifting speed of the cable is between 3000-6000 m/h, the operation speed of salvaging fallen fish can be greatly improved compared with the drill pipe. In the embodiment of the present invention, for some light-weight fallen fish, the load acquisition module can be driven by the control cable to salvage the fallen fish.

Wherein, the cable is coiled on the drum, and the load acquisition module can be connected and installed at the bottom of the cable. The cable is lowered at the wellhead, and the length of the lowered cable is adjusted according to the position of the fish, so that the cable drives the load acquisition module to move to the position of the fish.

Step B2, fixing the load collection module and the fallen fish through the spear in the load collection module.

Wherein, the fishing spear is a fishing tool, which can fix the fallen fish, so that the weight load of the fallen fish can be transferred to the load collection module.

Step B3, controlling the lifting of the cable, driving the load collection module to move to the initial position through the cable, and recording the second load value of the load collection module.

Wherein, the length of the cable lifting is adjusted according to the position of the falling fish and the initial position, so that the cable drives the load acquisition module to move to the initial position.

The advantage of this setting is that the fish that are light in weight and difficult to determine from the weight scale can be salvaged through the cable, and the speed and efficiency of fishing the fish can be improved.

S130. Determine a fishing result of the fallen fish according to the first load value and the second load value.

Among them, the salvage result can be divided into salvage success and salvage failure. In the embodiment of the present invention, the fishing result of the fallen fish can be determined by comparing the first load value of the load acquisition module in the no-load state with the second load value in the loaded state.

As an optional but non-limiting implementation, determining the fishing result of the fallen fish according to the first load value and the second load value includes but is not limited to the following steps C1 to C2:

Step C1. According to the first load value and the second load value, determine the difference between the first load value and the second load value.

In the embodiment of the present invention, the value obtained by subtracting the first load value from the second load value may be used as the difference value, or the absolute value obtained by subtracting the second load value from the first load value may be used as the difference value.

Step C2. If the difference is greater than zero, it is determined that the fishing of the fallen fish is successful; if the difference is equal to zero, it is determined that the fishing of the fallen fish has failed.

When the difference is greater than zero, it can be determined that the load acquisition module has caught fish under load; when the difference is equal to zero, it can be determined that no fish has been caught under load by the load acquisition module. Through such setting, the salvage result of the fallen fish can be clarified conveniently and quickly.

An embodiment of the present invention provides a method for fishing a fallen fish. The method determines the initial position according to the position of the fallen fish, controls the load acquisition module to move to the initial position, and records the first load value of the load acquisition module; controls the load acquisition module Move to the position of the falling fish, fix the load acquisition module and the falling fish and lift them up to the initial position, and record the second load value of the load acquisition module; determine the falling fish according to the first load value and the second load value salvage results. The technical solution is to realize the monitoring of the load value of the load acquisition module under two conditions of no-load and load, so as to ensure the accuracy of judging the fishing result of the fallen fish.

On the basis of the above embodiments, optionally, the recording method of the load value includes but not limited to the following steps D1 to D4:

Step D1. Obtain the initial load signal collected by the tension and pressure sensor in the load collection module through the load collection module.

Wherein, the tension and pressure sensor can be a resistive sensor, which is composed of an elastic sensitive element, a resistance strain gauge, a compensation resistor and a casing. When the elastic sensitive element is deformed by the force, the resistance strain gauge attached to it deforms together, and the resistance strain gauge converts the degree of deformation into the change of resistance value, so that the initial load signal can be obtained.

Step D2, performing enhancement processing on the initial payload signal to obtain an enhanced payload signal.

Since the location of the falling fish is generally far from the ground, and the intensity of the initial load signal collected by the tension and pressure sensor is weak, it is not enough to transmit the initial load signal to the wellhead during the long-distance signal transmission process. Therefore, in the embodiment of the present invention, the signal received by the wellhead is made more accurate by enhancing the initial load signal collected by the tension and pressure sensor.

Wherein, the enhanced processing manner may be filter processing, amplification processing, modulation and demodulation processing, or equalization processing. This embodiment of the present invention does not limit this, and it can be determined according to actual needs.

Step D3, transmitting the enhanced load signal to the wellhead through the cable.

Among them, the cable is used as the medium connecting the ground equipment and the downhole operation tool. The cable can be retracted and retracted by the ground winch to transmit the pulling force to the downhole operation tool, and the signal collected by the downhole operation tool can be transmitted to the surface equipment. The advantage of such setting is that the signal collected downhole can be stably transmitted by using the cable.

Step D4, converting the enhanced load signal to determine the load value of the load acquisition module.

After the surface equipment receives the enhanced load signal collected downhole transmitted by the cable, in order to facilitate the ground staff to determine the downhole situation, the enhanced load signal needs to be converted into recognizable and intuitive data information.

Wherein, the signal conversion may be conversion of the interface standard of the signal, or decoding of the signal.

Exemplarily, if the level logic of the payload value is 232 level or USB level, and the level logic of the enhanced payload signal is TTL level, then the level logic of the enhanced payload signal needs to be converted. For example, the TTL level can be converted to 232 level through MAX232, MAX3232, SP232, SP3232 and other chips.

As an optional but non-limiting implementation, the initial load signal is enhanced to obtain an enhanced load signal, including but not limited to the following steps E1 to E3:

Step E1, amplifying and filtering the initial load signal to obtain a pure load signal.

Among them, the amplification process can amplify the amplitude of the initial load signal through the amplification circuit, so as to ensure the accurate acquisition of the signal. The filtering process can filter the noise in the initial load signal through the filtering circuit to ensure the purity of the signal. In the embodiment of the present invention, a high-quality and pure signal can be obtained by amplifying and filtering the initial load signal.

Step E2, encoding the pure payload signal to obtain a Manchester code corresponding to the pure payload signal.

Among them, coding is used to fight against noise signals and attenuation in the channel, so as to improve anti-interference ability and error correction ability. In the embodiment of the present invention, the pure payload signal can be coded into Manchester code, which is convenient for subsequent long-distance signal transmission of cables.

Step E3, amplifying the Manchester code to obtain an enhanced payload signal.

In order to ensure that the follow-up signal can be effectively transmitted during the long-distance transmission of the cable, the transmission power of the Manchester code corresponding to the pure payload signal can be amplified to obtain an enhanced payload signal.

The advantage of this setting is that the effectiveness of long-distance transmission of the signal is ensured by amplifying, filtering, encoding and other processing methods on the signal.

Optionally, before encoding the pure payload signal, amplifying the power of the pure payload signal is further included to obtain the conditioned payload signal. Correspondingly, the conditioning payload signal is encoded to obtain a Manchester code corresponding to the conditioning payload signal; the power of the Manchester code is amplified to obtain an enhanced payload signal.

Fig. 2a-Fig. 2d are schematic diagrams of various stages of a fishing process for a fallen fish provided in the second embodiment of the application. As shown in Figure 2a, the falling fish A is short-circuited by the oil pipe, and the control cable D drives the signal processing module and the load acquisition module C to be lowered to a preset height above the falling fish A, and records the first load of the load acquisition module C at this time. The load value F ₁ is 50N; among them, the fishing spear B in the load acquisition module C is used to fix the falling fish A. As shown in FIG. 2 b , the cable D is controlled to drive the signal processing module and the load acquisition module C to move to the position of the falling fish A, and the falling fish A is fixed. As shown in Figure 2c, the control cable D drives the fixed fish A up to the position shown in Figure 2a, and records that the second load value _F2 of the load acquisition module is 300N at this time; calculate the first load value _F1 If the difference with the second load value _F2 is 250N, it can be determined that the fishing result of the fallen fish A is successful. As shown in Figure 2d, if the fishing result is successful, the control cable will drive the fixed fish up to the wellhead, and there will be no fish in the well at this time.

Embodiment two

FIG. 3 is a schematic structural diagram of a fish fishing system provided in Embodiment 2 of the present application. This embodiment is optimized on the basis of the above embodiments. As shown in Figure 3, the fishing system for falling fish includes a cable 310, a load acquisition module 320, a signal processing module 330 and a signal processing module 340, wherein:

The cable 310 is used to drive the load acquisition module 320 to move to a designated position;

The load collection module 320 is configured to obtain the initial load signal collected by the tension and pressure sensor in the load collection module 320, and transmit the initial load signal to the signal processing module 330;

The signal processing module 330 is configured to receive the initial load signal transmitted by the load acquisition module 320, perform enhanced processing on the initial load signal to obtain an enhanced load signal, and transmit the enhanced load signal to the cable 310;

The cable 310 is also used to receive the enhanced load signal obtained by the signal processing module 330, and transmit the enhanced load signal to the signal processing module at the wellhead;

The signal processing module is configured to receive the enhanced load signal transmitted by the cable 310 , convert the enhanced load signal, and determine the load value of the load acquisition module 320 .

Among them, the cable 310 is used as a medium connecting the ground equipment and the downhole operation tool. The cable 310 can be retracted and retracted by the ground winch to transmit the pulling force to the downhole operation tool, and can also transmit the signals collected by the downhole operation tool to the surface equipment. According to the bearable weight of the cable 310 , the fish caught within the bearable weight range of the cable 310 can be salvaged and determined.

Wherein, the load collection module 320 can collect the weight and load information of the fish that has been salvaged.

Optionally, FIG. 4 is a schematic structural diagram of a load collection module provided in Embodiment 2 of the application. As shown in FIG. 4, the load acquisition module 320 includes a fishing spear 321 and a tension and pressure sensor 322, wherein,

The fishing spear 321 is connected with the tension and pressure sensor 322, and is used to fix the load collection module 320 and the falling fish;

The tension and pressure sensor 322 is connected with the signal processing module 330 , and is used to obtain the initial load signal of the load of the fishing spear 321 , and transmit the initial load signal to the signal processing module 330 .

Among them, the fishing spear 321 is a fishing tool for falling fish, which can be determined according to the construction environment. The fishing spear 321 and the tension and pressure sensor 322 can be connected by a conventional variable-opening short-circuit method. The manner in which the spear 321 fixes the load collection module 320 and the fish can be determined according to the type of the spear 321 .

Wherein, the tension and pressure sensor 322 can be a resistive sensor, which is composed of an elastic sensitive element, a resistance strain gauge, a compensation resistor and a casing. When the elastic sensitive element is deformed by the force, the resistance strain gauge attached to it deforms together, and the resistance strain gauge converts the degree of deformation into the change of resistance value, so that the initial load signal can be obtained.

Wherein, the signal processing module 330 can enhance the signal transmitted by the load collection module 320 to obtain a signal suitable for long-distance transmission.

Optionally, FIG. 5 is a schematic structural diagram of a signal processing module provided in Embodiment 2 of the application. As shown in Figure 5, the signal processing module 330 includes a signal conditioning unit 331, a signal enhancement unit 332 and a signal transmission unit 333, wherein,

The signal conditioning unit 331 is configured to receive the initial load signal transmitted by the load acquisition module 320, and perform amplification processing and filtering processing on the initial load signal to obtain a pure load signal;

A signal enhancement unit 332, configured to encode the pure payload signal to obtain a Manchester code corresponding to the pure payload signal;

The signal transmission unit 333 is configured to amplify the Manchester code to obtain an enhanced payload signal.

Wherein, the signal processing module 340 can convert the enhanced load signal transmitted by the cable 310 to obtain an intuitively identifiable load value, so as to determine the fishing result of the fallen fish.

Optionally, FIG. 6 is a schematic structural diagram of a signal conversion module provided in Embodiment 2 of the application. As shown in Figure 6, the signal processing module includes a signal decoding unit 341, an interface conversion unit 342 and a display unit 343, wherein,

The signal decoding unit 341 is configured to receive the enhanced payload signal transmitted by the cable 310, and decode the enhanced payload signal to obtain a TTL level signal of the enhanced payload signal;

An interface conversion unit 342, configured to convert the TTL level signal into a USB level signal;

The display unit 343 is configured to determine and display the load value of the load acquisition module 320 according to the USB level signal.

Wherein, the signal decoding unit 341 is used to decode the Manchester code.

Wherein, the interface conversion unit 342 can convert the level logic of the decoded enhanced payload signal to obtain a recognizable USB level signal.

Among them, the display unit 343 can determine the load value collected by the load collection module 320 according to the USB level signal, and generate a load curve according to the load value and collection time collected by the load collection module 320, which is convenient for intuitive display and judgment of the fishing result of the fallen fish . In addition, the display unit 343 can also store the identified load value data.

An embodiment of the present invention provides a fishing system for fallen fish. The system includes a cable, a load acquisition module, a signal processing module, and a signal processing module, wherein the cable is used to drive the load acquisition module to move to a designated position; the load acquisition module, Used to obtain the initial load signal collected by the tension and pressure sensor in the load acquisition module, and transmit the initial load signal to the signal processing module; the signal processing module is used to receive the initial load signal transmitted by the load acquisition module, and enhance the initial load signal Process the enhanced load signal, and transmit the enhanced load signal to the cable; the cable is also used to transmit the enhanced load signal to the signal conversion module at the wellhead; the signal conversion module is used to receive the enhanced load signal transmitted by the cable, and transmit the enhanced load signal to the wellhead. The enhanced load signal is converted to determine the load value of the load acquisition module. The technical solution is to realize the monitoring of the load value of the load acquisition module during the fishing process of the fallen fish, so as to ensure the accuracy of the judgment of the fishing result of the fallen fish.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, the various steps described in this application may be executed in parallel, sequentially, or in a different order, as long as the desired result of the technical solution of this application can be achieved, there is no limitation herein.

The above specific implementation methods are not intended to limit the protection scope of the present application. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (11)

1. A method for fishing a fallen fish, characterized in that the method comprises: Determine the initial position according to the position of the falling fish, control the load collection module to move to the initial position, and record the first load value of the load collection module; controlling the load collection module to move to the position of the falling fish, fixing the load collection module and the falling fish and lifting them to the initial position, and recording the second load of the load collection module value; A fishing result of the fallen fish is determined according to the first load value and the second load value. 2. The method according to claim 1, wherein, according to the first load value and the second load value, determining the fishing result of the fallen fish comprises: determining a difference between the first load value and the second load value based on the first load value and the second load value; If the difference is greater than zero, it is determined that the fishing of the fallen fish is successful; if the difference is equal to zero, it is determined that the fishing of the fallen fish has failed. 3. The method according to claim 1, wherein, before determining the initial position according to the position of the falling fish, the method further comprises: Determine the height of the dropped fish to the ground based on the gauge; According to the height, the position of the falling fish is determined. 4. The method according to claim 1, wherein determining the initial position according to the position of the falling fish comprises: According to the position of the falling fish and the preset height, it is determined that the preset height above the falling fish is the initial position. 5. The method according to claim 1, wherein the load collection module is controlled to move to the position of the falling fish, and the load collection module and the falling fish are fixed and lifted to the initial position, and record the second load value of the load acquisition module, including: The control cable is lowered, and the load acquisition module is driven by the cable to move to the position where the fish falls; Fixing the load collection module and the fallen fish through the fishing spear in the load collection module; controlling the lifting of the cable, driving the load collection module to move to the initial position through the cable, and recording the second load value of the load collection module. 6. method according to claim 1, is characterized in that, the recording method of described load value comprises: Obtain the initial load signal collected by the tension and pressure sensor in the load acquisition module through the load acquisition module; performing enhanced processing on the initial load signal to obtain an enhanced load signal; The enhanced load signal is transmitted to the wellhead through the cable; Converting the enhanced load signal to determine the load value of the load acquisition module. 7. The method according to claim 6, characterized in that, performing enhanced processing on the initial payload signal to obtain an enhanced payload signal, comprising: performing amplification processing and filtering processing on the initial load signal to obtain a pure load signal; Encoding the pure payload signal to obtain a Manchester code corresponding to the pure payload signal; The Manchester code is amplified to obtain an enhanced load signal. 8. A system for fishing a fallen fish, characterized in that it is applied to a method for fishing a fallen fish, and the system includes a cable, a load acquisition module, a signal processing module and a signal conversion module, wherein, The cable is used to drive the load acquisition module and the signal processing module to move to a designated position; The load collection module is configured to obtain an initial load signal collected by the tension and pressure sensor in the load collection module, and transmit the initial load signal to the signal processing module; The signal processing module is configured to receive the initial load signal transmitted by the load acquisition module, perform enhanced processing on the initial load signal to obtain an enhanced load signal, and transmit the enhanced load signal to the cable; The cable is also used to transmit the enhanced load signal to the signal conversion module at the wellhead; The signal conversion module is configured to receive the enhanced load signal transmitted by the cable, convert the enhanced load signal, and determine the load value of the load acquisition module. 9. The system according to claim 8, wherein the load acquisition module includes a fishing spear and a tension and pressure sensor, wherein, The fishing spear is connected to the tension and pressure sensor, and is used to fix the load collection module and the fish; The tension and pressure sensor is connected with the signal processing module, and is used to obtain an initial load signal of the load of the fishing spear, and transmit the initial load signal to the signal processing module. 10. The system according to claim 8, wherein the signal processing module comprises a signal conditioning unit, a signal enhancement unit and a signal transmission unit, wherein, The signal conditioning unit is configured to receive the initial load signal transmitted by the load acquisition module, and perform amplification processing and filtering processing on the initial load signal to obtain a pure load signal; The signal enhancement unit is configured to encode the pure payload signal to obtain a Manchester code corresponding to the pure payload signal; The signal transmission unit is configured to amplify the Manchester code to obtain an enhanced payload signal. 11. The system according to claim 8, wherein the signal conversion module comprises a signal decoding unit, an interface conversion unit and a display unit, wherein, The signal decoding unit is configured to receive the enhanced payload signal transmitted by the cable, and decode the enhanced payload signal to obtain a TTL level signal of the enhanced payload signal; The interface converting unit is configured to convert the TTL level signal into a USB level signal; The display unit is configured to determine and display the load value of the load acquisition module according to the USB level signal.

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