A device and method for fishing an engineered drill bit

Abstract

The application discloses an engineering drill bit fishing device, which comprises a hoisting system, an underwater robot, a water injection system and a grouting system; the grouting system comprises a grout storage tank, a grouting pipe and a second water pump, one end of the grouting pipe is thrown into the upper part of a drill bit in a pile hole along with the underwater robot, the other end of the grouting pipe is connected with the second water pump, a second connecting pipe is arranged between the second water pump and the grout storage tank, and a mud sediment is arranged in the grout storage tank. Meanwhile, the application also discloses a fishing method based on the engineering drill bit fishing device, and solves the problem that it is difficult to fish a drill bit in the prior art due to muddy turbidity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of salvaging objects, in particular to an engineering drill bit salvaging device and method. BACKGROUND

[0002] It is known that whether it is to build high-rise buildings or to build bridges, it is necessary to first pile and drill holes. In the process of drilling, the soil structure selected for drilling is generally loose, and the soil around the pile hole is prone to collapse under the action of horizontal soil pressure, so mud needs to be poured into the hole to protect the hole wall. However, due to operational errors or other unpredictable factors, the drill bit sometimes falls into the mud, shallowly several meters and deeply several tens of meters.

[0003] The engineering drill bit generally contains high-hardness alloy, and the cost is high. Losing a drill bit will cause a direct loss of hundreds of thousands of yuan. On the other hand, each pile hole position is precisely designed by engineers according to geological conditions and stress conditions, with a very small deviation range. If the pile hole is abandoned due to the falling of the drill bit, the subsequent construction of the entire project will be affected, and the loss cannot be estimated.

[0004] The engineering team generally tries every means to salvage the drill bit. The most common method is to "invite a water ghost". The "water ghost" is a diver who usually carries a walkie-talkie, an oxygen cylinder, a set of diving suit with a weight of 40-50 kg, and a "life rope" tied around his body. The diver dives into a drill well with a diameter of about two meters filled with mud, finds the fallen drill bit and ties it to a steel wire rope, and then the partner above the drill well pulls the diver and the drill bit back to the ground. However, in order to maintain the pressure and prevent the pile hole from collapsing, the mud injected into the pile hole has a high density and a buoyancy much greater than water. This also means that diving into the mud is much more difficult than ordinary diving. At the same depth, the physical effort required for pile hole diving is several times that of ordinary diving.

[0005] The mud below the pile hole is dark and closed, and nothing can be seen. All operations below the pile hole are done by feeling the position of the drill bit with the hands and then operating according to the feeling. If the drill well is very deep, it may cause oxygen poisoning of the diver, with a high risk factor. In addition, for very deep pile holes, the diving depth often exceeds the working depth of the diver, and salvage cannot be performed. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the present application provides an engineering drill bit salvaging device and method to solve the problem of difficulty in salvaging the drill bit due to muddy and unclear water in the prior art.

[0007] The technical scheme adopted by the present application to solve its technical problems is:

[0008] An engineering drill bit salvaging device, comprising a hoisting system, an underwater robot, a water injection system and a grouting system.

[0009] The water injection system comprises a clean water tank, a water injection pipe and a first water pump, both ends of the water injection pipe are provided with pipe joints, one end of the water injection pipe is connected with the first water pump through a pipe joint, a pressure sensor and a valve are arranged on one side of the water injection pipe close to the first water pump, and a first connecting pipe is arranged between the first water pump and the clean water tank.

[0010] The grouting system comprises a slurry storage tank, a grouting pipe and a second water pump, one end of the grouting pipe is placed into the upper part of the drill bit in the pile hole along with the underwater robot, the other end of the grouting pipe is connected with the second water pump, a second connecting pipe is arranged between the second water pump and the slurry storage tank, and slurry sediment is arranged in the slurry storage tank.

[0011] The upper part of the underwater robot is provided with an annular water bag, the annular water bag is provided with a water inlet, the water inlet is connected with the water injection pipe through a pipe joint, the unfolded diameter of the annular water bag before water injection is smaller than the diameter of the pile hole, and the unfolded diameter of the annular water bag after water injection is greater than the diameter of the pile hole.

[0012] As a further improvement of the above technical solution, a plurality of telescopic legs are arranged on the side of the underwater robot, and the telescopic legs are in abutment with the side wall of the pile hole when the telescopic legs are elongated.

[0013] As a further improvement of the above technical solution, a mechanical arm is arranged on the bottom of the underwater robot.

[0014] As a further improvement of the above technical solution, a high-definition camera and an illuminating searchlight are arranged on the bottom of the underwater robot.

[0015] As a further improvement of the above technical solution, the high-definition camera and the illuminating searchlight are both provided with openable and closable protective covers, and the protective covers are in a semispherical structure.

[0016] As a further improvement of the above technical solution, a controller is connected with the underwater robot, and the controller is used for controlling the opening and closing of the protective cover, the action of the mechanical arm, the telescoping of the telescopic leg and the turning on of the illuminating searchlight.

[0017] As a further improvement of the above technical solution, the hoisting system comprises a drill bit hoisting system and a robot hoisting system, the robot hoisting system comprises a winch and a first cable, and the top of the underwater robot is provided with a lifting ring, and the end of the first cable is connected with the lifting ring.

[0018] As a further improvement of the above technical solution, the drill bit hoisting system comprises a crane, a second cable and a lifting hook, the lifting hook is matched with a pin hole on the drill bit, and a safety catch is arranged on the lifting hook.

[0019] The present application also provides a fishing method using the above engineering drill bit fishing device, which comprises the following steps:

[0020] Step 1, configure mud sediment liquid, configure corresponding mud sediment liquid according to the concentration of the mud in the pile, the mud sediment liquid is prepared by mixing mud precipitant and water, and the ratio of the mud precipitant to water is 0.1% to 0.3%;

[0021] Step 2, assemble the equipment, the underwater robot is put into the pile hole together with the hook, the first cable, the second cable, the water injection pipe and the grouting pipe, the telescopic legs on the side of the underwater robot are stretched open by the controller, the hole wall is resisted, the underwater robot is fixed, water is injected into the annular water bag through the water injection pipe, the volume of the annular water bag is expanded, the gap between the underwater robot and the pile hole wall is filled, the water pressure is calculated according to the display of the pressure sensor, when the pressure in the annular water bag is greater than the mud pressure outside the annular water bag by 10% to 20%, the water injection is stopped and the water injection pipe switch is closed, the water pressure in the water bag is kept unchanged;

[0022] Step 3, open the second water pump and inject the mud sediment liquid into the pile hole through the grouting pipe, after the mud liquid in the pile hole is clear, the position of the drill bit is judged according to the underwater environment seen by the high-definition camera, and the hook is hung on the pin shaft hole of the drill bit by operating the mechanical arm through the controller.

[0023] Step 4, after the treatment is completed, the protective cover of the illuminating searchlight and the camera is closed, the water injection pipe valve is opened, the water in the water bag is squeezed out under the elastic pressure of the annular water bag, the volume is reduced, the legs on the side of the underwater robot are retracted through the controller, the underwater robot is retracted through the winch, and then the drill bit is lifted out through the crane.

[0024] As a further improvement of the above technical solution, when the mud sediment liquid is still not clear after being injected in step 3, the mud sediment liquid is adjusted and then injected again, and the operation is continued.

[0025] The beneficial effects of the present application are:

[0026] 1. In the present application, the grouting pipe injects the mud sediment liquid into the pile hole, the mud sediment liquid mixes with the mud in the pile hole to make it precipitate, so that the mud becomes clear, the drill bit condition is observed through the illuminating searchlight and the high-definition camera, the hook is hung in the pin shaft hole of the drill bit by operating the mechanical arm through the controller, the safety card can prevent the hook from falling off during the pulling process, and then the drill bit is salvaged, thereby solving the problem that the drill bit is not easy to salvage due to muddy and unclear mud in the prior art.

[0027] 2. In the present application, the annular water bag can effectively prevent the mixing of the upper slurry and the lower slurry after being inflated, only the small range of slurry on the top of the drill bit needs to be precipitated and clarified, the disturbance to the pile hole wall and the slurry is reduced, and the time for mud clarification can be shortened.

[0028] 3, The device has small volume, flexible disassembly and assembly, no pollution and high work efficiency.

[0029] 4, The device has low cost, wide work depth and aperture range, can effectively replace the water ghost, has high safety and can effectively avoid personal injury caused by underwater hole collapse, water depth pressure and the like. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described below in combination with the drawings and examples.

[0031] Figure 1 is a schematic diagram of a salvage device for an engineering drill bit;

[0032] Figure 2 is Figure 1 is an enlarged view of part A in FIG.

[0033] The marks in the figure are: winch 11, first cable 12, crane 21, second cable 22, lifting hook 23, safety catch 24, underwater robot 3, annular water bag 31, lifting ring 32, telescopic leg 33, mechanical arm 34, lighting searchlight 35, high-definition camera 36, protective cover 37, controller 4, cable 41, drill bit 5, pin shaft hole 51, clean water tank 61, first connecting pipe 62, first water pump 63, valve 64, pressure gauge 65, water injection pipe 66, slurry storage tank 71, second connecting pipe 72, second water pump 73, grouting pipe 74. DETAILED DESCRIPTION

[0034] The concept, specific structure and generated technical effects of the application will be described clearly and completely below in combination with examples and drawings, so as to fully understand the purpose, features and effects of the application. Obviously, the described examples are only some of the examples of the application, not all examples, and other examples obtained by those skilled in the art based on the examples of the application without creative labor are within the protection scope of the application. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but means that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation situation. The technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0035] Referring to Figure 1 , Figure 2, embodiment 1, a drilling bit fishing device, comprising a hoisting system, an underwater robot 3, a water injection system and a grouting system; the hoisting system comprises a bit hoisting system and a robot hoisting system, the robot hoisting system comprises a winch 11 and a first cable 12, the top of the underwater robot 3 is provided with a lifting ring 32, and the tail end of the first cable 12 is connected with the lifting ring 32; the bit hoisting system comprises a crane 21, a second cable 22 and a lifting hook 23, the lifting hook 23 is matched with a pin shaft hole 51 on the bit 5, and the lifting hook 23 is provided with a safety clamp 24.

[0036] The water injection system comprises a clean water tank 61, a water injection pipe 66 and a first water pump 63, a first connecting pipe 62 is arranged between the first water pump 63 and the clean water tank 61, both ends of the water injection pipe 66 are provided with pipe joints, one end of the water injection pipe 66 is connected with the first water pump 63 through the pipe joint, and a pressure sensor and a valve 64 are arranged on one side of the water injection pipe 66 close to the first water pump 63; in the embodiment, the pressure sensor is selected to be a pressure gauge 65, and the pressure gauge 65 is located at the rear end of the valve 64, so that the pressure gauge 65 is convenient for observing water pressure after the valve 64 is closed.

[0037] The grouting system comprises a grouting tank 71, a grouting pipe 74 and a second water pump 73, the grouting tank 71 is provided with a mud sediment, a second connecting pipe 72 is arranged between the second water pump 73 and the grouting tank 71, one end of the grouting pipe 74 is also provided with a pipe joint and is connected with the second water pump 73 through the pipe joint, and the other end of the grouting pipe 74 is thrown into the upper side of the bit 5 in the pile hole together with the underwater robot 3; after the second water pump 73 is opened, the mud sediment in the grouting tank 71 can be injected into the lower side of the underwater robot 3 and the upper side of the bit 5, so that the mud sediment on the upper side of the bit 5 in the pile hole becomes clear.

[0038] The upper part of the underwater robot 3 is provided with an annular water bag 31, the annular water bag 31 is made of anti-scratching elastic material (such as rubber), the annular water bag 31 can bear water pressure of a certain depth, the annular water bag 31 is provided with a water inlet, the water inlet is connected with the water injection pipe 66 through a pipe joint, the unfolded diameter of the annular water bag 31 before water injection is smaller than the diameter of the pile hole, and the unfolded diameter of the annular water bag 31 after water injection is greater than the diameter of the pile hole, so that the annular water bag 31 bears the side wall of the pile hole, fills the gap between the underwater robot 3 and the side wall of the pile hole, and separates the upper mud.

[0039] The underwater robot 3 is provided with three telescopic legs 33 on the lateral side, which are in contact with the side wall of the pile hole when extended, so as to fix the underwater robot 3 in the pile hole. The bottom of the underwater robot 3 is provided with two mechanical arms 34, which can rotate 360°. The mechanical arms 34 can install the lifting hook 23 in the pin hole of the drill bit 5. In addition, the mechanical arms 34 can also stir the slurry, which has the effect of accelerating the slurry sedimentation. The bottom of the underwater robot 3 is provided with two groups of high-definition cameras 36 and lighting searchlights 35, one of which is used as a backup. The outer sides of the high-definition cameras 36 and the lighting searchlights 35 are provided with openable protective covers 37. The protective covers 37 are in a semispherical structure, which prevents the slurry from obscuring the high-definition cameras 36 and the lighting searchlights 35. The underwater robot 3 is connected with a controller 4 through a cable 41. The controller 4 can control the opening and closing of the protective covers 37, the movement of the mechanical arms 34, the extension and retraction of the telescopic legs 33, and the turning on of the lighting searchlights 35.

[0040] Embodiment 2, based on the fishing method of the engineering drill bit fishing device in embodiment 1, comprises the following steps:

[0041] Step 1, configure slurry sedimentation liquid. According to the concentration of the slurry in the pile, configure the corresponding slurry sedimentation liquid. The slurry sedimentation liquid is prepared by mixing slurry sedimentation agent and water. The ratio of the slurry sedimentation agent to water is 0.1% to 0.3%, and in this embodiment, 0.2% is preferred. Then, according to the diameter of the pile hole, the volume of the slurry sedimentation liquid required for the slurry at a height of 0.8m above the drill bit 5 is obtained through experiments, and the slurry sedimentation liquid is prepared based on this volume to ensure that the slurry liquid is sufficient. In addition, the sedimentation time of the slurry is obtained through experiments.

[0042] Step 2, find out the accurate depth of the drill bit 5, assemble the equipment, and position the hoisting system. The underwater robot 3 is put into the pile hole together with the lifting hook 23, the first cable 12, the second cable 22, the water injection pipe 66, and the grouting pipe 74 at a position 0.5m above the drill bit 5. The telescopic legs 33 on the side of the underwater robot 3 are extended by the controller 4 to resist the hole wall and fix the underwater robot 3. Water is injected into the annular water bag 31 through the water injection pipe 66 to expand the volume of the annular water bag 31 and fill the gap between the underwater robot 3 and the pile hole wall. According to the water pressure displayed by the pressure gauge 65 in the annular water bag 31 and the water injection pipe 66, when the pressure in the annular water bag 31 is 10% to 20% greater than the slurry pressure outside the annular water bag 31 (preferably 15% in this embodiment), it indicates that the gap between the underwater robot 3 and the pile hole wall has been filled by the annular water bag 31. Stop injecting water and close the valve 64 of the water injection pipe 66 to keep the water pressure in the water bag unchanged.

[0043] Step 3, open the second water pump 73 to inject the slurry sediment into the pile hole through the grouting pipe 74, and control the mechanical arm 34 to stir gently through the controller 4 to promote precipitation. According to the precipitation effect of the previous experiment, after the predetermined precipitation time is reached, open the protective cover 37 of each searchlight and high-definition camera 36, and observe whether the slurry liquid in the pile hole has been clarified. When the slurry liquid in the pile hole is clear enough to be seen, judge the position of the drill bit 5 according to the underwater environment seen by the high-definition camera 36, and hang the lifting hook 23 on the pin shaft hole 51 of the drill bit 5 by operating the mechanical arm 34 through the controller 4. The safety catch 24 of the lifting hook 23 can prevent the lifting hook 23 from falling off during the pulling process. If the slurry liquid in the pile hole is still not clear enough, adjust the sediment liquid ratio and dosage according to the site conditions, and continue the operation until the slurry liquid in the pile hole is clarified.

[0044] Step 4, after the lifting hook 23 is hung on the pin shaft hole 51 of the drill bit 5, close the protective cover 37 of the searchlight 35 and the high-definition camera 36, open the valve 64 on the water injection pipe 66, and the annular water bag 31 will squeeze out the water in the water bag under its own elastic pressure, reducing the volume. The side legs of the underwater robot 3 are retracted through the controller 4, the underwater robot 3 is retracted through the winch 11, and then the drill bit 5 is lifted out through the crane 21.

[0045] The annular water bag 31 can effectively prevent the mixing of the upper slurry and the lower slurry after inflation during operation. The grouting pipe 74 injects the slurry sediment into the pile hole, and the mixing of the slurry sediment and the slurry in the pile hole causes the slurry to settle, thereby making the slurry clear. The situation of the drill bit 5 is observed through the searchlight 35 and the high-definition camera 36, the controller 4 controls the mechanical arm 34 to hang the hook in the pin shaft hole 51 on the drill bit 5, and the safety catch 24 can prevent the lifting hook 23 from falling off during the pulling process, and then the drill bit 5 is salvaged, thereby solving the problem that it is not easy to salvage the drill bit 5 due to muddy and unclear slurry in the prior art.

[0046] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present application, and these equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method of fishing an engineered drill bit, the method comprising: It comprises the following steps: Step 1, configure the mud sediment, configure the corresponding mud sediment according to the mud concentration in the pile, the mud sediment is prepared by mixing mud precipitant and water, the ratio of mud precipitant to water is 0.1%-0.3%; Step 2, assemble the engineering drill fishing device, put the underwater robot together with the hook, the first cable, the second cable, the water injection pipe and the grouting pipe into the pile hole above the drill bit, extend the telescopic legs on the side of the underwater robot through the controller, and fix the underwater robot by resisting the hole wall, fill the gap between the underwater robot and the pile hole wall by injecting water into the annular water bag through the water injection pipe, calculate the water pressure according to the pressure sensor display, when the pressure in the annular water bag is greater than the mud pressure outside the annular water bag by 10-20%, stop injecting water and close the water injection pipe switch, keep the water pressure in the water bag unchanged; Step 3, open the second water pump to inject mud sediment into the pile hole through the grouting pipe, after the mud liquid in the pile hole is clear, judge the position of the drill bit according to the underwater environment seen by the high-definition camera, and hang the hook on the pin hole of the drill bit through the controller operation mechanical arm; Step 4, after the treatment is completed, close the protective cover of the illuminating searchlight and the camera, open the water injection pipe valve, the annular water bag extrudes the water in the water bag under its own elastic pressure, the volume is reduced, the legs on the side of the underwater robot are retracted through the controller, the underwater robot is retracted through the winch, and then the drill bit is lifted out through the crane.

2. The fishing method of claim 1, wherein: If the mud sediment injected in step 3 cannot be seen after clarification, adjust the ratio of mud sediment and continue to put mud sediment.

3. The fishing method according to claim 1 or 2, characterized in that: The engineering drill fishing device in step 2 comprises a lifting system, an underwater robot, a water injection system and a grouting system. The water injection system comprises a clean water tank, a water injection pipe and a first water pump, both ends of the water injection pipe are provided with pipe joints, one end of the water injection pipe is connected with the first water pump through the pipe joint, a pressure sensor and a valve are arranged on one side of the water injection pipe close to the first water pump, and a first connecting pipe is arranged between the first water pump and the clean water tank; The grouting system comprises a grout storage tank, a grouting pipe and a second water pump, one end of the grouting pipe is put into the pile hole above the drill bit together with the underwater robot, the other end of the grouting pipe is connected with the second water pump, a second connecting pipe is arranged between the second water pump and the grout storage tank, and the grout storage tank is provided with mud sediment; The upper part of the underwater robot is provided with an annular water bag, the annular water bag is provided with a water inlet, the water inlet is connected with the water injection pipe through a pipe joint, and the annular water bag has an unfolding diameter less than the diameter of the pile hole before water injection and an unfolding diameter greater than the diameter of the pile hole after water injection.

4. The fishing method of claim 3, wherein: A plurality of telescopic legs are arranged on the side of the underwater robot, and the telescopic legs are in contact with the side wall of the pile hole when they are elongated.

5. The fishing method of claim 4, wherein: A mechanical arm is arranged on the bottom of the underwater robot.

6. The fishing method of claim 5, wherein: A high-definition camera and an illuminating searchlight are arranged on the bottom of the underwater robot.

7. The fishing method of claim 6, wherein: The outer sides of the high-definition camera and the illuminating searchlight are provided with openable protective covers, and the protective covers have a hemispherical structure.

8. The fishing method of claim 7, wherein: The underwater robot is connected with a controller, which is used for controlling opening and closing of the protective cover, action of the mechanical arm, telescoping of the telescopic legs and turning on of the lighting searchlight.

9. The fishing method of claim 3, wherein: The hoisting system comprises a drill bit hoisting system and a robot hoisting system, the robot hoisting system comprises a hoist and a first cable, and the top of the underwater robot is provided with an eye ring, and the tail end of the first cable is connected with the eye ring.

10. The fishing method of claim 9, wherein: The drill bit hoisting system comprises a crane, a second cable and a hook, the hook is matched with a pin hole on the drill bit, and the hook is provided with a safety catch.

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