86 results about "Fish head" patented technology

The invention discloses a binocular vision-based fish body quality non-contact estimation method, which comprises the following steps of: in a land-based facility circulating water high-density culture environment in which a fish body freely swims and is easy to block, firstly, obtaining a fish head local image through fish head region segmentation, and carrying out position alignment and scale normalization processing on the fish head local image; constructing a stable fish head geometric anchor point; then, the fish head anchor point is used as condition input, and a generative model is used for inferring and complementing the overall shape of the fish body so as to recover a continuous geometric structure of the fish body; on the basis, binocular stereo vision is combined to carry out stereo matching on key points of the head and the tail of the fish body, and the length of the fish body is obtained through triangulation; finally, based on the mapping relation between the body length and the quality, automatic estimation of the fish body quality is achieved, manual contact with the fish body is not needed, stable and automatic measurement of the fish body quality can be achieved in a complex breeding scene, and the method has the advantages of being high in adaptability, low in stress risk and high in application value.

The invention belongs to the technical field of underwater bionic robots, and particularly relates to a robotic fish deformable tail fin based on hydraulic drive and a working method thereof. According to the robotic fish based on hydraulic driving, a four-cylinder plunger pump is arranged in the fish head to serve as a hydraulic power source, the fish body comprises a large connector, a middle connector and a small connector, the large connector distributes hydraulic oil to a bionic driving unit set of a joint I, left-right bending of the fish body is achieved, meanwhile, the hydraulic oil is conveyed to the middle connector through an oil conveying pipe, and the small connector distributes the hydraulic oil to the joint I; after pressure synchronization is guaranteed through a pressure equalizing annular pipeline in the fishtail, a piston of a joint II is driven to move, the fishtail is designed to be a deformable tail fin, a tail arm is pushed to rotate through the synchronously-moving piston, and then a tail edge pipe is driven to deform and relatively move, so that the fishtail can dynamically change the area, the camber and the shape in the swimming process; therefore, different cruising speed and maneuverability requirements are met. Through the centralized hydraulic system and bionic structure design, active controllable adjustment of the shape of the deformable tail fin is achieved.

The invention belongs to the technical field of underground fish salvage, and provides an underground fish head lateral magnetic detection device and method.The underground fish head lateral magnetic detection device comprises a measuring probe tube which is placed in a salvage borehole and used for detecting a variable flow magnetic field at the position of a fish; one end of the releasing tool is connected with the measuring probe; the converter is used for generating a variable-flow magnetic field at a fish falling position and is connected with one end, far away from the measuring probe, of the releasing tool; one end of the cable extends into the salvage borehole to be connected with the measuring probe, and the other end of the cable is connected with a ground industrial control unit located on the ground; the salvage well hole is located on one side of the fish well hole, and fishes are reserved in the fish well hole. According to the device, a variable-flow magnetic field can be generated at a fish falling position through the converter, then a variable-flow magnetic field signal at the fish falling position can be obtained in real time through the measuring probe, the measuring probe and the converter are arranged in a fishing fish eye on one side of the fish falling position, the positioning error can be reduced, meanwhile, the converter is remotely controlled through a controller on the ground, and the positioning accuracy is improved. Magnetic field interference can be reduced.

The utility model relates to the field of fish processing, and discloses fish sorting equipment for fish processing. A supporting rail is welded to the upper surface of the working plate, a lower clamping plate is movably connected to the upper surface of the supporting rail, a movable shaft is arranged on the outer surface of the lower clamping plate, an upper clamping plate is welded to the outer surface of the movable shaft, an electric auxiliary pressing plate is arranged on the lower surface of the upper clamping plate, a centering shell is arranged on the upper surface of the lower clamping plate, and a reference electric controller is welded to the outer surface of the centering shell. A motor drives a movable shaft, then a lower clamping plate and the movable shaft are opened and closed to extrude a fish head, a telescopic motor is arranged in an electric auxiliary pressing plate below an upper clamping plate to fix a fish, a centering shell is composed of two racks and a movable gear, the racks are fixed to the lower clamping plate and the electric auxiliary pressing plate respectively, and the movable gear is located in the middle. The movable gear is always in the central position under the meshing action, the extended cross rod of the movable gear is driven to the reference electric controller, the reference position is found by controlling the lifting of the lifting platform corresponding to the internal position of the reference electric controller, and the central position of the fish is conveniently found.

The utility model discloses a novel bionic mechanical fish relates to mechanical fish technical field, including fish head mechanism, the back of fish head mechanism is provided with multistage fish body mechanism, the back of multistage fish body mechanism is provided with fish tail, multistage fish body mechanism includes the docking board no.

The utility model belongs to the technical field of liquid nitrogen quick-freezing equipment, and particularly relates to liquid nitrogen quick-freezing equipment for fish head processing, which comprises a base, the upper end of the base is in contact with a cover, a backing ring is fixedly connected in the base, a mounting seat is slidably connected in the cover, the mounting seat is slidably connected with the base, and the backing ring is fixedly connected with the base. The lower end of the mounting seat is in contact with a sealing gasket, and the upper end of the sealing gasket is fixedly connected with a clamping block. The sealing gasket, the backing ring and other key components are innovatively designed and elaborately arranged, the sealing degree between the cover and the base can be effectively increased, the threaded rod is ingeniously matched, the sealing gasket and the backing ring can be accurately driven to be tightly attached through flexible rotation, the sealing effect between the cover and the base is greatly improved, and the service life of the cover is prolonged. The problems that liquid nitrogen quick-freezing equipment for fish head processing is poor in sealing performance and liquid nitrogen is prone to leaking when used are fundamentally solved, and stable and efficient operation of the equipment is assisted.

The application relates to the technical field of downhole operation of oil exploitation, in particular to a lost fish head detection device and method for taking and replacing a casing, the method comprising the following steps: by collecting the magnetic variable of a downhole probe at each sampling depth, a potential interference section is first determined; then, by combining the magnetic field gradient distribution and the horizontal magnetic field direction characteristics, the magnetic field change balance degree and the direction consistency are calculated, the stratum lithology and external interference are effectively removed, and the real lost fish head section is accurately locked; finally, the horizontal distance is calculated by using the magnetic field vector weighted summation, and the fish collecting strategy is output. The application aims to improve the accuracy of fish head positioning and the fish collecting success rate.

The application discloses a motor for coiled tubing and a use method thereof. The motor comprises an external shell and an internal transmission component installed in the external shell. The external shell is composed of a short section, a power shell, a winding shaft shell, a transmission shaft shell and an end sleeve which are sequentially screwed together. The internal transmission component is composed of a rotor, a winding shaft and a transmission shaft which are sequentially screwed together. A rubber stator corresponding to the rotor is fixedly installed in the power shell. An upper compensating sleeve is installed between the winding shaft shell and the winding shaft. A lower compensating sleeve is installed between the end sleeve and the transmission shaft. A roller bearing assembly and an oil bath type bearing assembly are respectively installed between the transmission shaft shell and the transmission shaft. The motor assembly is simultaneously increased with the stator and the rotor, so that the rotor outputs a lower rotating speed to the transmission shaft, thereby driving the fishing tool connected to the lower part of the transmission shaft to rotate and guiding the fish head into the fishing tool.

The invention discloses a rigidity distribution optimization method based on an elastic beam driving bionic fish body, and belongs to the field of underwater bionic robots. According to the method, the problem that the swimming performance of the bionic fish body is poor due to the fact that an existing method cannot achieve overall rigidity distribution optimization of the bionic fish body is solved. According to the method, a parameter vector composed of a characteristic size, an elastic modulus, a Poisson's ratio and a damping parameter is selected as an optimization variable, and a center line movement track is calculated through an elastic beam deformation track, a rigid fish head track, a tail peduncle track, a tail fin track and a middle beam deformation track on the two sides of a bionic fish body; the parameter vectors are iteratively searched and updated according to the midline motion trail and the rigidity distribution scheme, so that the optimization range is expanded from the tail to the whole bionic fish body, the flexibility and continuity of the full length of the fish body are realized, the obtained rigidity distribution optimization result is closer to the swimming mechanism of real fish, and the swimming performance of the bionic fish body is improved. The method can be applied to rigidity distribution optimization of the elastic beam driven bionic fish body.

The application provides a drilling tool fishing device and fishing method for large-diameter well construction, and belongs to the technical field of drilling tool fishing, and comprises a pipe nipple, a hook-shaped claw, a built-in joint and a thread-making cone. The hook-shaped claw is vertically welded at the lower end of the pipe nipple. The built-in joint is coaxially fixed at the upper end of the pipe nipple. A connecting barrel is elastically and slidably arranged in the built-in joint. A cross-shaped connecting seat is coaxially fixed at the lower end of the connecting barrel. The thread-making cone is coaxially fixed on the cross-shaped connecting seat. The outer arc surface of the pipe nipple is circumferentially and uniformly hinged with clamping claws. The top end of each clamping claw is provided with a guide groove. The end of the cross-shaped connecting seat is fixedly provided with a guide column. The application can quickly right the fish head. The thread-making cone is threadedly connected with the clamping claw to achieve double reliable fixation. The mud can drive the unlocking structure to simplify the operation process, and significantly improve the operation efficiency and construction safety.

The utility model discloses a fish killing machine, and relates to the technical field of fish killing machines, the fish killing machine comprises a fish killing machine main body and a fish head adjusting device, the fish head adjusting device comprises a first rack, an adjusting table and a reciprocating driving structure; an adjusting cavity is formed in the adjusting table, a fish outlet is formed in the side, close to the fish killing machine body, of the adjusting table, one end of the fish outlet is communicated with the adjusting cavity, the other end of the fish outlet is matched with the fish killing machine body, the bottom face of the adjusting cavity is obliquely arranged, a fish pouring position is arranged at one end in the adjusting cavity, and a plurality of guide sliding grooves are formed in the other end of the adjusting cavity; the pair of sliding parts are arranged on the first rack in a matched mode, the adjusting table is arranged on the pair of sliding parts and is in sliding connection with the first rack through the pair of sliding parts, the driving part is arranged on the first rack and used for driving the adjusting table to reciprocate, and the problems that in the fish killing process of an existing fish killing machine, the position of a fish head cannot be automatically adjusted, manual adjustment is needed, and the fish killing efficiency is high are solved. And the fish killing efficiency is not high.

The invention belongs to the technical field of ocean engineering, particularly relates to an underwater mobile robot based on an underwater acoustic communication technology, and provides the following scheme aiming at solving the problems that a fish-imitating underwater robot is easy to wind in a complex turbid water area, a sensor is easy to lose efficacy due to sediment adhesion, and the maneuvering operation capability of the fish-imitating underwater robot is seriously hindered. One side of the fish body shell is fixedly connected with a fish head, one side of the fish head is provided with a motorized auxiliary module, the motorized auxiliary module comprises a mounting plate, and the tail of the fish body shell is provided with a tail swinging mechanism. The underwater mobile robot based on the underwater acoustic communication technology has the advantages that entanglements can be actively removed through the movable cutting blade of the maneuvering auxiliary module, system faults are prevented, meanwhile, an automatic cleaning function is achieved, a sensor can be kept clean, it is ensured that the image quality is stable, and the maintenance requirement is remarkably reduced.

This invention discloses an underwater multi-target tracking method based on stable semantic regions, relating to the fields of computer vision and underwater intelligent sensing technology. The method includes: acquiring underwater images and defining stable semantic regions for fish heads; performing feature extraction and fish head detection on the underwater images to obtain fish head detection results; generating a segmentation mask for the stable semantic region of each fish head based on the fish head detection results within the multi-target tracking framework; calculating the physical centroid of the stable semantic region of the fish head based on the segmentation mask, using the physical centroid as a tracking anchor point for target association and trajectory tracking; determining the real-time spatial position of the fish body and its real-time attitude by using the physical centroid of the stable semantic region of the fish head as a reference point and combining it with the positional information of the stable semantic region of the fish head, thus completing multi-target tracking. This invention effectively avoids problems such as positioning deviation and missed detection caused by the non-rigid deformation of the fish body, improving the accuracy and stability of underwater fish swarm tracking.

This invention discloses a biomimetic robotic fish with amphibious capabilities and its control method, belonging to the field of robotics technology. The robotic fish comprises an unsealed head assembly, a fully sealed body assembly, and a flexible tail assembly. Symmetrically positioned on both sides of the head assembly are dual pectoral fins controlled by independent waterproof bus servos. The body assembly integrates a microcontroller, a brushless DC motor, and a reel. In underwater maneuvering mode, the microcontroller controls the brushless DC motor to pull the flexible tail assembly through a transmission rope to provide axial thrust, while independently adjusting the fluid angle of attack of the dual pectoral fins to generate lift or sinking, achieving three-dimensional spatial maneuvering. In amphibious crawling mode, the dual pectoral fins serve as mechanical support limbs, propelling the body forward through periodic contact with the ground. This invention overcomes the limitations of traditional robotic fish that rely on water buoyancy and two-dimensional planar movement, achieving continuous operation and three-dimensional attitude control across various media environments.

The utility model discloses a fish head processing, cleaning and waste discharging device which comprises a fish head cleaning machine body, and the fish head cleaning machine body comprises a cleaning machine body. When a worker processes and cleans a fish head, the worker places the fish head in the cleaning roller right above the cleaning cavity for cleaning, and when the fish head in the cleaning roller is cleaned, the fish head falls into the inner side of the cleaning cavity through the through holes in the periphery of the cleaning roller; through the top end of a guide frame located on the inner side of a cleaning cavity and located under a cleaning roller, due to the fact that the guide frame is arranged in a slope mode, fish scales and internal organs can be guided to a collecting opening in the inner side of the cleaning cavity, and some small fish scales and internal organs which cannot be guided are collected through a screening net plate under the guide frame; fish scales and viscera can be collected through the guide frame and the screening net plate, discharge of a discharge pipe is reduced, and unnecessary pollution is reduced.

The utility model relates to an adjustable counterweight device based on a side-scan sonar tow fish, which can accurately increase and decrease counterweight lead blocks when the adjustable counterweight device is used for adjusting a tow posture based on sonar, and comprises a tow fish head and a suspension screw I, the counter weight comprises a circular plate, a fixed plate, a lead block and a suspension screw II; the adjustable balance weight comprises a circular plate II, a fixing plate II, a lead block II and a suspension screw III, the circular plate II and the fixing plate II are fixedly installed through screws, the lead block II, the circular plate II and the fixing plate II are fixedly assembled through heat-shrinkable sleeves, and the whole adjustable balance weight is suspended on the balance weight through the suspension screw II. According to the adjustable counterweight device, the lead blocks with different sizes are manufactured according to actual requirements, a plurality of adjustable counterweights are overlaid, and the circular plates and the fixing plates between the adjustable counterweights are combined and mounted, so that the adjustment of the counterweights is realized, and finally, the adjustment of the pitching posture of the tow fish is completed.

The utility model belongs to the technical field of pet supplies, and particularly relates to a fish-shaped food leakage pet toy. The fish-shaped food leakage pet toy comprises a fish head, a fish bone and a fish tail which are detachably connected in sequence, wherein the fish head comprises a sounding whistle arranged at the top of the fish head; the fishbone comprises a main body part for storing granular feed, a plurality of convex parts arranged on the main body part and granular feed temporary storage spaces formed on the convex parts and communicated with the main body part; the fishtail comprises a vibrator arranged on the fishtail. According to the fish-shaped food leakage pet toy, the specific structure of the fish-shaped food leakage pet toy is limited, so that the fish-shaped food leakage pet toy simulates the shape of a fish through mutual cooperation of the fish head, the fish bone and the fish tail which are detachably connected in sequence, and the pet food is added to the fish bone, so that the pet food leakage effect is improved. The pet can recognize and pay attention to the fish-shaped food leakage pet toy through vision and smell, the interest of the pet is improved, the pet is attracted to actively play with the fish-shaped food leakage pet toy, and the feeding and playing fun of the pet is improved.

The invention discloses a bionic robotic fish head double-shaft split mechanism which comprises an upper jaw skeleton, an upper jaw driving connecting rod, a frame, a dimensional skeleton, a lower jaw driving connecting rod, a lower jaw skeleton, a driving connecting rod, a waterproof motor and bionic robotic fish appearance parts. The function of the mouth opening and closing linkage mechanism of the bionic robot is achieved through a small number of parts. According to the bionic robot, the assembly requirement is greatly reduced while the part manufacturability is improved, the length of each connecting rod is reasonably designed, the flexible design of the opening angle of the mouth is achieved, the design flexibility of opening and closing of the mouth of the bionic robot is improved, and then different ornamental effects are achieved.

The application discloses a kind of embroidery needle method for showing the special body shape longitudinal fish scale of Wuchang fish, it is related to embroidery technical field, specifically a kind of embroidery needle method for showing the special body shape longitudinal fish scale of Wuchang fish, its steps include: first, the pattern designed according to the body shape of Wuchang fish is embroidered on the cloth, and the pattern is embroidered around using silver wire and colored silk thread, from the tail of fish, silver wire is wound into the ring with a diameter of 1-2mm, and the silk thread is fixed, then, it is repeated longitudinally to the direction of fish head, and is overlapped with the previous ring, forming the circular embroidery mark arranged longitudinally, simulating the longitudinal texture of fish scale, and the three-dimensional sense of decorative needle method is improved by embroidering from the tail of fish to the direction of fish head. The method can accurately show the characteristics of the special body shape and longitudinal fish scale of Wuchang fish, and is suitable for embroidery art, clothing and home accessories manufacturing.

The utility model relates to metal hard fish bait field discloses a kind of metal hard bait super long bait, including fish head, the rear end of fish head is fixedly connected with bait body mechanism, the inside of fish head is fixedly connected with simulation fish eye, the bait body mechanism includes bait body, the rear end of fish head is fixedly connected with bait body, the inside of bait body is equipped with three hanging holes, the inside of bait body is equipped with three long holes, the bottom of bait body is fixedly connected with fish abdomen component, the inside of bait body is equipped with reaming, the rear end of bait body is fixedly connected with tail component.In the utility model, directional turbulence is generated when uniform collection is enhanced to attract fish, three-hook design is used in hollow block of fish abdomen component and tail component, three long holes optimize hydrodynamics performance, abdomen tail component strengthens sinking efficiency, finally through threefold stimulation of air film imaging, dynamic turbulence and fast diving, the attack desire and hooking rate of target fish are significantly improved.

The application relates to the field of machine fish, and particularly discloses a high-speed bionic machine fish based on tail fin enhanced propulsion, which comprises a fish head bionic part, a fish body bionic part and a tail fin piece; the end of the fish body bionic part is movably connected with an open tail bone support; a crank rocker structure is arranged on the fish body bionic part; the crank rocker structure is connected with the open tail bone support; the open tail bone support is partially connected with the tail fin piece; and a tail handle side convex fin piece is arranged on the open tail bone support; the crank rocker structure is used for converting rotary motion into the reciprocating swing action of the whole body of the open tail bone support and the tail fin piece; the tail handle side convex fin piece is used for generating a backward rolling vortex and colliding with the leading edge vortex generated by the tail fin piece in the reciprocating swing process. The open tail bone support is used as the tail handle connecting structure of the machine fish to connect the tail fin piece and the fish body bionic part, so that a faster swimming speed can be obtained under the automatic swimming model of the machine fish.

The invention relates to the technical field of bionic robots, in particular to a dynamic variable-stiffness bionic robotic fish which comprises a fish head, a fish body and a fish tail, and the fish body comprises at least two fish body sections which are sequentially connected in series in the axial direction; x-shaped joints are arranged at the joints of the fish body sections and the fish tail or at the joints of the adjacent fish body sections; a spatial distribution type double-channel driving system is constructed in the fish head and comprises a swing module and an online variable stiffness module which are independent of each other. The swing module comprises a swing driving assembly and a rigid guiding piece extending along the central axis of the fish body. The rigid guide piece penetrates through the central space of each level of fish body section under the driving of the swing driving assembly and is used for applying lateral thrust to the fish body sections to determine a swing track; decoupling control of tail swing and rigidity adjustment can be achieved, so that the swimming frequency and the body rigidity can be independently adjusted in real time, and better propelling efficiency and maneuvering performance are obtained.

The invention discloses a variable stiffness rope-driven robotic fish, which comprises a robotic fish body, a control part and an electronic function module, the robotic fish body comprises a rigid fish head part, a flexible fish skeleton and an adjustable fish tail part, the flexible fish skeleton is formed by combining a variable stiffness mechanism and a rope and is used for driving the robotic fish to swim, and the variable stiffness characteristic is provided by a spring element; a variable stiffness mechanism is matched with a rope driven by a motor to simulate the antagonism of muscles when fishes swim in nature, so that the swim speed and efficiency are improved to a certain extent, and tail fins of different models can be detached and replaced at the tail part of the fish; the control part, the electronic function module and the power supply are all arranged in the cavity of the fish head part; the robotic fish is controlled by an infrared remote control open loop, can realize swinging of the fish tail at different frequencies, can be used for researching optimization of a variable stiffness mechanism, and is expected to be used in the fields of underwater exploration, environment detection and the like after being carried with other detection modules.

The application relates to a fish-shaped underwater robot driven in a multi-mode, and relates to a fish-shaped underwater robot. The application is used to solve the problems of low swimming efficiency, poor stability, poor maneuverability and the incapability of avoiding obstacles in time of the existing bionic robots. The application comprises a fish head, an upper shell plate, a lower shell plate, a fish tail, two first driving mechanisms, two second driving mechanisms, a tail fin assembly, a propeller and an electronic cabin. The upper shell plate and the lower shell plate are connected to form a fish body, the fish head, the fish body and the fish tail are sequentially connected in a head-to-tail mode, the two first driving mechanisms are respectively arranged on the two sides of the fish body close to the fish head end and are connected with the fish body, the two second driving mechanisms are respectively arranged on the two sides in the fish tail and are connected with the fish tail, the electronic cabin is arranged in the fish body, and the propeller is connected with the tail end of the fish tail through the tail fin assembly. The application has the vector propulsion driving of the propeller and the bionic tail swing driving, and the multi-mode switching swimming greatly improves the functional characteristics of the robot fish.

The utility model relates to the technical field of soft bait fishing tackles, and discloses a turbulent flow type fish tail soft bait fishing tackle which comprises a bait body, the bait body is of a fish-shaped structure, the bait body comprises a fish head, a fish body and a fish tail, a turbulent flow piece is fixed to the fish tail, and the whole turbulent flow piece is of a sheet-shaped structure. The spoiler is additionally arranged at the tail of the bait, so that the tail of the bait vibrates leftwards and rightwards in water, the posture of simulating fish swimming is more vivid and vivid, when the bait is dragged in water, the spoiler can generate strong vibration and turbulent flow, the attention of the fish can be attracted within a certain distance, and even if the fish is out of the visual range, the fish can be prevented from being scratched by the spoiler. And the vibrations can be sensed through the side lines, so that the vibrations are attracted, and the fish luring effect is greatly improved.

The invention belongs to the technical field of food processing, and discloses a use method of a phosphorus-free water-retaining agent suitable for silver carp and bighead carp heads. The method comprises the following steps: selectively depolymerizing a mucus layer on the skin of a fish head by using alkaline protease, trehalose and a sodium citrate pretreatment solution through a mucus layer nanopore channel induction-low-temperature vacuum tumbling synergistic permeation process to form 50-200nm through micropores; and then combining vacuum rolling and kneading at 4 DEG C to drive non-phosphorus water retention components such as sodium carboxymethyl cellulose and L-arginine to uniformly permeate into muscular tissues at a depth of more than 8mm. According to the method disclosed by the invention, a set of complete, controllable and efficient phosphorus-free water retention technical system is constructed through cooperative regulation and control of interface microstructure engineering and mass transfer kinetics, so that not only is the problem of core quality deterioration in deep processing of silver carp and bighead carp heads solved, but also a transferable technical normal form is provided for phosphorus-free preservation of other high-mucus covering type aquatic products.

1. Name of the product in this design: Fish bait (fish head hook). 2. Purpose of this design: Fishing bait. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: the front view.

The invention relates to the field of oil field underground workover treatment, in particular to a drilling and grinding method under pressure. The problem that an existing drilling and grinding method cannot protect stratum energy and cannot be applied to a high-pressure well is mainly solved. Comprising the following steps: S1, construction preparation; s2, drilling and grinding parameters are determined; s3, drilling and grinding construction, wherein all part structures of a drilling tool are connected and put into a well; when the tripping-in distance is 2-3 m away from the fish top, the drilling tool is moved up and down, and circulation is established; lowering a drilling tool while circulating, pressurizing for 1-2t of a fish finding head, and marking the depth of a tubular column on an operation table; the pipe column is lifted by 2-3 m, the displacement is adjusted, and the pipe column is lowered for milling while the pipe column is rotated; the milling shoe is lifted up by 3-5 m for up-down redressing every time 1-2 m of milling is carried out; and stopping milling, lifting the drilling and grinding tool away from the well bottom, and pulling out the milling tubular column after drilling and grinding are finished. When the under-pressure drilling and grinding method is used for an abnormal high-pressure well, the stratum energy can be kept, long-term overflow and pressure reduction are avoided, the well repair time efficiency is improved, meanwhile, environmental pollution is reduced, and green well repair is achieved.

The utility model discloses an elastic connecting structure of multi-joint bionic bait, and particularly relates to the field of multi-joint bionic bait, which comprises a bionic fish head bait piece, one side of the bionic fish head bait piece is provided with a first bionic fish body bait piece, one side of the first bionic fish body bait piece is provided with a second bionic fish body bait piece, and the second bionic fish body bait piece is provided with a second bionic fish body bait piece. A bionic fish tail bait piece is arranged on one side of the second bionic fish body bait piece, a connecting piece is hinged to one side face of the first bionic fish body bait piece through a pin shaft, and a connecting groove is formed in one side face of the second bionic fish body bait piece. According to the detachable bionic fish body bait, through the detachable elastic connecting structure, for example, the first bionic fish body bait piece and the second bionic fish body bait piece are combined and connected through the connecting piece, the connecting groove, the sliding clamping block and other parts, when a certain part such as a tail joint or a trunk joint is damaged, the damaged part can be detached for replacement, and the whole bait does not need to be scrapped; the service life of the bait is greatly prolonged, and the use cost of fishing enthusiasts is reduced.

The invention provides a fishing socket, a fishing method and application, the fishing socket comprises an upper connector, a socket body and a fishing tile which are sequentially connected, the upper end of the upper connector is provided with a connecting buckle to be connected with a drilling tool, and the lower end of the upper connector is in threaded connection with the upper end of the socket body; the cylinder body is provided with a hollow first axial cavity; the fishing tile is installed on the lower section of the first axial cavity. The fishing method is realized by adopting the fishing barrel. The fishing socket is applied to fishing of the air hammer drill bit or short fish head falling objects. According to the fishing barrel, the air hammer drill bit which cannot be fished by a conventional fishing tool can be fished smoothly, rotation is not needed during operation, and operation is simpler and more convenient.