Portable device and method for opening a hole in a sunken oil tank

Abstract

The application discloses a portable shipwreck oil tank opening device and belongs to the technical field of shipwreck salvage, which comprises a bottom plate, an opening flange plate, an adjusting seat, a drilling machine and a fixing seat. The middle part of the bottom plate is provided with a hole for accommodating the opening flange plate and the adjusting seat. The periphery of the middle hole of the bottom plate is provided with a mounting hole. The adjusting seat is fixed on the bottom plate by being screwed in the mounting hole. The drilling machine is arranged on the side surface of the fixing seat. The drill bit of the drilling machine is downward corresponding to the center position of the opening flange plate. The fixing seat is fixed on the upper surface of the adjusting seat by bolts. The front part and both sides of the bottom plate are provided with holes. Small magnets are arranged in the holes. The underwater opening device integrates a small drilling machine in the structure. A diver can conveniently and quickly fix the structure on the surface of a ship body which needs to be opened. Only a simple operation handle is needed to complete the opening operation, thereby greatly improving the opening efficiency and safely and efficiently completing the opening work of a specific position of the ship body.

Description

Technical Field

[0001] This invention relates to the field of shipwreck salvage technology, and more specifically, to a portable device and method for opening holes in the oil tanks of a sunken ship. Background Technology

[0002] In recent years, with the rapid development of the global shipping industry, maritime transport has become increasingly busy, the number and density of maritime activities have continued to increase, and the navigation environment has become increasingly complex, which has gradually increased the probability of major oil spill pollution risks at sea. When ships run aground or sink, the risk of oil spills increases significantly. Timely extraction of fuel oil from the affected vessel and transfer to other safe locations is an effective measure to prevent and mitigate the damage caused by oil spills.

[0003] The general procedure for oil extraction from a wrecked vessel is as follows: determine the extraction location – create a hole at the extraction location using drilling equipment – ​​connect the drilling equipment – ​​extract the oil – seal the hole. If the oil in the tank is solidified due to factors such as oil quality or temperature, heating of the solidified oil is required during the extraction operation. During the drilling stage, if the main support vessel cannot approach the wrecked vessel due to water depth limitations, large drilling and pumping equipment cannot be used. In this case, portable drilling equipment is required. Because the wrecked vessel's interior is affected by external swells, divers move with the swells, making conventional drilling quite difficult. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a portable underwater drilling structure that integrates a small drilling machine into the structure. Divers can easily and quickly fix the structure to the surface of the hull where a hole needs to be drilled, and the drilling operation can be completed with just a simple operating handle, which greatly improves the efficiency of drilling.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a portable shipwreck oil tank opening device, including a base plate, an opening flange, an adjusting seat, a drilling machine, and a fixing seat. The base plate has a hole in the middle to accommodate the opening flange and the adjusting seat. Mounting holes are provided around the opening in the middle of the base plate. The adjusting seat is fixed to the base plate by bolts in the mounting holes. The drilling machine is set on the side of the fixing seat, with the drill bit of the drilling machine facing down and corresponding to the center position of the opening flange. The fixing seat is fixed to the upper surface of the adjusting seat by bolts. The front and side of the base plate have openings, and small magnets are installed in the openings.

[0006] Preferably, the drilling machine is connected to the fixed base via a slide rail, which is connected to a lead screw. The lead screw is connected to a hand crank, and the rotation of the hand crank causes the drill bit to move up and down, thereby realizing the functions of drilling and retracting.

[0007] Preferably, the adjusting seat includes an aluminum alloy side plate and a slider. There are two aluminum alloy side plates, and a sliding groove is provided on the aluminum alloy side plate. The slider is placed between the two aluminum alloy side plates and slides in the sliding groove. The aluminum alloy side plates are connected and fixed to the base plate by bolts. A lead screw is provided in the slider and is connected to a handwheel. The rotation of the handwheel drives the lead screw to rotate, and the rotation of the lead screw drives the slider to move left and right in the aluminum alloy side plate. The fixed seat is fixed on the top of the slider. The left and right movement of the slider drives the drilling machine to move.

[0008] Preferably, the small magnet is a switchable magnetic base.

[0009] Preferably, a limiting block is provided on the base plate around the perforated flange. The limiting block is fixed to the base plate with bolts. The center hole of the perforated flange is aligned with the drill bit of the drilling machine. The position of the perforated flange is adjusted according to the position of the drill bit. After the position of the perforated flange is adjusted, the perforated flange is fixed with the limiting block. Four bolt mounting holes are evenly distributed on the perforated flange.

[0010] Preferably, it also includes a positioning locking rod, which is set on the side of the circular hole in the base plate. After the perforated flange is fixed, the positioning locking rod locks against the outer circumference of the perforated flange, so that the perforated flange is fixed tightly.

[0011] Preferably, a gasket is provided at the bottom of the perforated flange to prevent leakage at the contact point between the perforated flange and the hull.

[0012] Preferably, a large magnet is fixedly installed at the bottom of the adjustment seat, and a handle is installed next to the large magnet. The large magnet is a switch-type magnetic seat, and the opening and closing of the handle can control the magnetic attraction force of the large magnet.

[0013] Preferably, Torx screws are provided at the four corners of the base plate, and the stroke of the Torx screws is adjustable so that the base plate is fully fitted to the surface of the hull.

[0014] A portable method for opening oil tanks in sunken ships includes the following steps: (1) The drilling equipment is assembled on shore, and the divers carry the drilling equipment, ball valves, and spare accessories to the drilling area; (2) Use a shovel to clear away marine organisms at the location where the drilling device is to be installed on the hull to ensure that the hull at the drilling location is flat. (3) After adjusting the drilling device to the planned position, close the handle of the three small magnets to initially position and fix the drilling device; (4) Close the large magnet handle so that the drilling device is firmly attached to the surface of the hull; (5) Rotate the four Torx screws one by one to tighten the bolts against the hull to prevent the base from tilting and shaking due to the reaction force during the drilling stage because the hull is uneven. (6) After the drilling device is fixed, connect the hydraulic power pipe to the hydraulic pipe joint of the drilling machine. Start drilling the first fixing hole of the opening flange by rotating the hand crank of the drilling machine. During the drilling process, pay attention to continuously pull out the chips and clean them. (7) After the hole is pierced, the round nut is stopped on the flange with its boss, and the drill bit cannot continue to drill in. Tighten the round nut to open the expansion sleeve on the drill rod at the position of the hull plate, and the drill rod is tightened on the flange and the hull plate. (8) After loosening the drill bit with an internal hexagonal socket and withdrawing the drill, complete the drilling of the first fixing hole of the flange and fix the flange. (9) After the first flange fixing hole is drilled and fixed, the drilling of the second flange fixing hole begins; (10) Turn off the switches of the large magnet and the small magnet, and retract the four corner Torx screw handwheels into the bottom plate of the drilling device; (11) Using the drilled flange as the central axis, rotate the base plate 90 degrees along the outer ring of the flange to the second fixed hole position; (12) Install the second set of drill bit assembly, test the clamping to check whether the center of the drill bit is concentric with the second hole; (13) Begin drilling the second hole until drilling the hull plate; (14) Repeat the operation of the first hole to tighten the flange; at this point, the flange is completely positioned with the two bolts in place. (15) Repeat the above operation to complete the drilling and fastening of the 3rd and 4th holes of the drilled flange. At this point, the drilled flange is fixed to the hull by bolts. (16) Install the ball valve onto the perforated flange using a nut, and then open the ball valve; (17) By turning the handwheel, push the drill slide block to the center position of the drill bit aligned with the flange, adjust the drill to the appropriate operable direction, and then close the small magnet and large magnet handles to firmly attract the hull plate. (18) Adjust the Torx screws one by one according to the actual installation situation so that the bolts are tightened on the hull to prevent the base from tilting and shaking due to the reaction force during the drilling stage because the hull is uneven. (19) Drilling begins after the drill bit passes through the center of the ball valve by rotating the hand crank of the drill rig; (20) After drilling is completed, quickly pull out the drill bit and close the ball valve to prevent oil leakage; (21) After the oil well drilling is completed, the drilling equipment is dismantled. (22) Push the three positioning locking rods on the bottom plate of the drilling device outward and fix them in the normally open position; (23) Pull out the hydraulic line and the connection joint of the drilling machine, loosen the small magnet and the large magnet, remove the limit block of the opening flange, leave the opening flange and ball valve on the hull, and then remove and recycle the bottom plate along with the opening device.

[0015] By adopting the technical solution of the present invention, the following beneficial effects can be obtained: (1) By opening and closing three small magnets installed on the base plate of the drilling device, the drilling device can be precisely and quickly temporarily fixed to the surface of the ship. (2) For drilling operations on the curved surface of the hull plate, the drilling device can be stabilized by adjusting the four Torx screws on the bottom plate of the drilling device, so as to prevent the drilling device from tilting and shaking due to the reaction force during the drilling process. (3) The perforated flange has four evenly distributed round holes. The drilling machine performs drilling operations in the four round holes in sequence and simultaneously embeds four special drill bits (with functions of drilling, tapping and bolt tightening) on ​​the perforated flange to achieve the fixation between the perforated flange and the hull plate. (4) After the perforated flange is fixed to the hull plate, open the handle of the large magnet and adjust the drilling machine to the position for drilling the oil extraction hole by rotating the handwheel of the slider. (5) During the drilling operation, after the drilling machine is adjusted to the position, the large magnet is firmly attached to the hull plate by manipulating the handle of the large magnet, thereby realizing the stable fixation of the drilling device on the hull surface, solving the technical problem that the underwater drilling device is inconvenient to fix. The underwater device is initially fixed by magnetic attraction, without the need for additional mechanical fixing, which facilitates underwater installation and operation. (6) A gasket is provided between the perforated flange and the hull plate to strengthen the seal between the flange and the hull and prevent oil leakage during the drilling process; (7) The drilling device is lightweight and easy for divers to operate underwater. It can handle drilling and oil extraction work when the mother ship cannot approach the difficult ship. (8) After drilling at one location is completed, retract the positioning lock rod and open the large magnet and small magnet to quickly dismantle the hole-opening device.

[0016] (9) All components of the drilling device are connected by bolts or pins, and there is no hot work involved in the disassembly process, making maintenance and upkeep convenient and quick. Even if individual parts are damaged, they can be quickly replaced, greatly reducing maintenance costs and time. Attached Figure Description

[0017] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein: Figure 1 This is a schematic diagram of the structure of the opening device. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the opening device. Figure 2 ; Figure 3 This is the front view of the opening device; Figure 4 This is a left view of the opening device; Figure 5 This is a top view of the opening device; Figure 6 This is a bottom view of the opening device; The markings in the above figures are as follows: 1. Base plate; 2. Small magnet; 3. Limit block; 4. Torx screw; 5. Positioning locking rod; 6. Gasket; 7. Perforated flange; 8. Ball valve; 9. Hex head bolt; 10. Locking pin; 11. Aluminum alloy side plate; 12. Drilling machine; 13. Slider; 14. Large magnet; 15. Magnetic handle; 16. Handwheel; 17. Hand crank; 18. Adjustment seat; 19. Fixed seat. Detailed Implementation

[0018] The following description, with reference to the accompanying drawings, further details the specific implementation of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part.

[0019] like Figure 1 , 2 As shown, the portable shipwreck oil tank opening device includes a base plate 1, an opening flange 7, an adjusting seat 18, a drilling machine 12, and a fixing seat 19. The base plate 1 has a hole in the middle to accommodate the opening flange 7 and the adjusting seat 18. Mounting holes are provided around the opening in the middle of the base plate 1. The adjusting seat 18 is fixed to the base plate 1 by bolts in the mounting holes. The drilling machine 12 is set on the side of the fixing seat 19, with the drill bit of the drilling machine 12 facing down and corresponding to the center position of the opening flange 7. The fixing seat 19 is fixed to the upper surface of the adjusting seat 18 by bolts. The front and side of the base plate 1 have openings, and small magnets 2 are provided in each of the openings. There are 3 small magnets 2, and the small magnets 2 are switchable magnetic seats.

[0020] The drilling machine 12 is connected to the fixed base 19 via a slide rail. The slide rail is connected to a lead screw, which is connected to a hand crank 17. Rotating the hand crank 17 moves the drill bit up and down, achieving the functions of drilling and retracting. The aforementioned adjusting base 18 includes an aluminum alloy side plate 11 and a slider 13. There are two aluminum alloy side plates 11, and a sliding groove is provided on the aluminum alloy side plate 11. The slider 13 is placed between the two aluminum alloy side plates 11 and slides in the sliding groove. The aluminum alloy side plates 11 are connected and fixed to the base plate 1 by bolts. A lead screw is provided in the slider 13, which is connected to a handwheel 16. Rotating the handwheel 16 drives the lead screw to rotate, and rotating the lead screw drives the slider 13 to move left and right within the aluminum alloy side plate 11. The fixed base 19 is fixed to the top of the slider 13. The left and right movement of the slider 13 drives the drilling machine 13 to move left and right.

[0021] A limiting block 3 is installed on the base plate 1 around the perforated flange 7. The limiting block 3 is fixed to the base plate 1 with bolts. The center hole of the perforated flange 7 is aligned with the drill bit of the drilling machine 12. The position of the perforated flange 7 is adjusted according to the position of the drill bit. After the position of the perforated flange 7 is adjusted, the perforated flange 7 is fixed with the limiting block 3. Four bolt mounting holes are evenly distributed on the perforated flange 7 for fixing the perforated flange 7 to the hull of the sunken ship.

[0022] like Figure 1 As shown, a positioning locking rod 5 is provided on the base plate where the perforated flange 7 is placed. The positioning locking rod 5 is located on the side of the round hole in the base plate 1. After the perforated flange 7 is fixed, the positioning locking rod 5 locks against the outer circumference of the perforated flange 7, so that the perforated flange 7 is fixed tightly.

[0023] A gasket 6 is installed at the bottom of the perforated flange 7. The gasket 6 prevents leakage at the contact point between the perforated flange 7 and the hull. The gasket 6 is adhered to the surface of the perforated flange 7 to achieve a seal between the perforated flange 7 and the hull plate, preventing oil leakage after the opening. A large magnet 14 is fixedly installed at the bottom of the adjusting seat 18. A handle is installed next to the large magnet 14. The large magnet 14 is a switch-type magnetic seat, and the opening and closing of the handle can control the magnetic attraction force of the large magnet 14.

[0024] A Torx screw 4 is installed at each of the four corners of the base plate 1. The stroke of the Torx screw 4 is adjustable so that the base plate 1 fits fully against the surface of the hull.

[0025] like Figure 1 , 2 As shown, the small magnet 2 is fixed to the base plate 1 by bolts. The base plate 1 has mounting holes, and the small magnet 2 is fixed in the mounting holes by bolts. There are a total of 3 small magnets 2. The hole-making device can be quickly and temporarily fixed to the hull by the handle of the small magnet. The small magnet 2 is a switch-type magnetic base. The handle on the small magnet 2 is the switch of the magnetic base. The opening and closing of the handle controls the attraction force of the small magnet 2.

[0026] The limiting block 3 is fixed to the base plate 1 by bolts. The bottom of the limiting block 3 is equipped with a roller. Before the hole-opening device is lowered into the water, the position of the hole flange 7 is adjusted by the three limiting blocks 3. The drill rod of the drilling machine is then tested to align the hole flange 7. After all the alignments are satisfied, the fixing bolts of the limiting block 3 are tightened to fix the limiting block 3 to the base plate 1.

[0027] Three positioning locking rods 5 are provided on the base plate 1. After the three positioning locking rods 5 are pushed into place, they can limit the perforated flange 7 on the perforation device. This allows the perforated flange 7 to be pre-assembled and adjusted on the ship deck and then carried into the water for operation, avoiding the underwater alignment process.

[0028] The four Torx screws 4 installed on the base plate 1 can be used to adjust the stroke of the Torx screws 4 to make contact between the base plate 1 and the hull surface when the base plate 1 cannot fully fit the hull surface in areas where the surface of the ship is curved, thereby improving the reliability of drilling operations.

[0029] The aluminum alloy side plate 11 is connected to the base plate 1 by bolts, and the slider 13 is connected to the aluminum alloy side plate 11 by hexagonal head bolts 9 and locking pins 10. The aluminum alloy side plate 11 and the slider 13 are provided with sliding grooves. With the cooperation of hexagonal head bolts 9 and locking pins 10, the slider 13 can move back and forth between the aluminum alloy side plates 11 to adjust the position of the opening.

[0030] The drilling machine 12 and the slider 13 are connected by bolts. The movement of the slider 13 can realize the forward and backward movement of the drilling machine 12.

[0031] The slider 13 and the large magnet 14 are connected by bolts. The movement of the slider 13 can drive the large magnet 14 to move back and forth. A magnet handle 15 is installed on the large magnet 14. By adjusting the opening and closing of the magnet handle 15, the adsorption and disconnection between the large magnet 14 and the hull plate can be achieved.

[0032] By rotating the handwheel 16 mounted on the slider 13, the slider 13, the drilling machine 12, and the large magnet 14 can be moved back and forth, thereby adjusting the drilling position.

[0033] The drill bit can be moved up and down by rotating the hand crank 17 on the main body of the drilling machine 12 in both directions, thereby realizing the functions of drilling and retraction.

[0034] A portable method for opening oil tanks in sunken ships includes the following steps: (1) The drilling equipment is assembled on shore, and the divers carry the drilling equipment, ball valve 8, and spare accessories to the drilling area; (2) Use a shovel to clear away marine organisms at the location where the drilling device is to be installed on the hull to ensure that the hull at the drilling location is flat. (3) After the drilling device is adjusted to the planned position, close the handle of the three small magnets 2 to initially position and fix the drilling device; (4) Close the handle of the large magnet 14 so that the drilling device is firmly attached to the surface of the hull; (5) Rotate the four Torx screws one by one to tighten the bolts against the hull, so as to prevent the base from tilting and shaking due to the reaction force during the drilling stage because the hull is uneven. (6) After the drilling device is fixed, connect the hydraulic power pipe to the hydraulic pipe joint of the drilling machine. Start drilling the first fixing hole of the opening flange 7 by rotating the hand crank 17 of the drilling machine. During the drilling process, pay attention to continuously pull out the chips and clean them. (7) After the hole is pierced, the round nut is stopped by its boss on the perforated flange 7, and the drill bit cannot continue to drill in. Tighten the round nut to open the expansion sleeve on the drill rod at the position of the hull plate, and the drill rod is tightened on the flange and the hull plate. (8) After loosening the drill bit with the internal hexagon and withdrawing the drill, complete the drilling of the first fixing hole of the flange 7 and fix the flange; (9) After the first flange fixing hole is drilled and fixed, the drilling of the second flange fixing hole begins; (10) Turn off the switches of the large magnet 14 and the small magnet 2, and retract the four corner Torx screws 4 handwheels into the bottom plate 1 of the drilling device; (11) With the drilled flange 7 as the central axis, rotate the base plate 1 90 degrees along the outer ring of the flange to the second fixed hole position; (12) Install the second set of drill bit assembly, test the clamping to check whether the center of the drill bit is concentric with the second hole; (13) Begin drilling the second hole until drilling the hull plate; (14) Repeat the operation of the first hole to tighten the flange; at this point, the flange is completely positioned with the two bolts in place. (15) Repeat the above operation to complete the drilling and fastening of the 3rd and 4th holes of the drilled flange. At this point, the perforated flange 7 is fixed to the hull by bolts. (16) Install the ball valve 8 onto the perforated flange 7 using a nut, and open the ball valve 8; (17) By turning the handwheel 16, push the drill slide block 13 to the center position of the drill bit aligned with the flange, adjust the drill to the appropriate operable direction, and then close the handles of the small magnet 2 and the large magnet 14 to firmly attach the hull plate. (18) Adjust the Torx screws 4 one by one according to the actual installation situation so that the bolts are tightened on the hull to prevent the base from tilting and shaking due to the reaction force during the drilling stage because the hull is uneven. (19) Drilling begins after the drill bit passes through the center of the ball valve 8 by rotating the hand crank 17 of the drilling machine; (20) After drilling is completed, quickly pull out the drill bit and close the ball valve 8 to prevent oil leakage; (21) After the oil well drilling is completed, the drilling equipment is dismantled. (22) Push the three positioning locking rods 5 on the bottom plate of the drilling device outward and fix them in the normally open position; (23) Pull out the hydraulic line and the connection joint of the drilling machine, loosen the small magnet 2 and the large magnet 14, remove the limit block 3 of the opening flange 7, leave the opening flange 7 and the ball valve 8 on the hull, then remove and recycle the bottom plate 1 along with the opening device, and then drain the oil through the pipeline connected by the ball valve 8.

[0035] This drilling device takes into full account situations where large ships cannot reach the vicinity of shipwrecks. It is a drilling device that can be easily fixed to the hull plate and can be equipped with a small drilling machine, which can safely and efficiently complete the drilling work at specific locations on the hull.

[0036] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A portable device for opening oil tanks in sunken ships, characterized in that: The system includes a base plate, a perforated flange, an adjusting seat, a drilling machine, and a fixed seat. The base plate has a hole in its center to accommodate the perforated flange and the adjusting seat. Mounting holes are provided around the perimeter of the central hole in the base plate. The adjusting seat is fixed to the base plate by bolts tightened into the mounting holes. The drilling machine is mounted on the side of the fixed seat, with its drill bit pointing downwards, corresponding to the center of the perforated flange. The fixed seat is fixed to the upper surface of the adjusting seat by bolts. The base plate has holes at the front and on both sides, each containing a small magnet. The drilling machine and the fixed seat... The drill bit is connected to a slide rail via a lead screw, which in turn is connected to a hand crank. Rotating the hand crank moves the drill bit up and down, enabling drilling and retraction. The adjustment seat includes two aluminum alloy side plates and a slider. Each side plate has a groove, and the slider is positioned between the two side plates, sliding within the groove. The side plates are bolted to the base plate. A lead screw is installed within the slider and connected to a handwheel. Rotating the handwheel rotates the lead screw, which in turn moves the slider left and right within the side plates. The fixed base is fixed to the top of the slider, and the slider moves left and right to drive the drilling machine to move; the small magnet is a switchable magnetic base; a limiting block is set on the base plate around the perforated flange, and the limiting block is fixed to the base plate by bolts. The center hole of the perforated flange is aligned with the drill bit of the drilling machine. The position of the perforated flange is adjusted according to the position of the drill bit. After the position of the perforated flange is adjusted, the perforated flange is fixed with the limiting block. There are 4 bolt mounting holes evenly distributed on the perforated flange; it also includes a positioning locking rod, which is set on the base plate. On the side of the round hole, after the perforated flange is fixed, the positioning locking rod locks against the outer circumference of the perforated flange to fix it tightly; a gasket is set at the bottom of the perforated flange to prevent leakage at the contact point between the flange and the hull; a large magnet is fixedly set at the bottom of the adjusting seat, and a handle is set next to the large magnet. The large magnet is a switch-type magnetic seat, and the opening and closing of the handle can control the magnetic attraction force of the large magnet; Torx screws are set at the four corners of the base plate, and the stroke of the Torx screws is adjustable to ensure that the base plate is fully in contact with the surface of the hull.

2. A portable method for opening oil tanks in sunken ships, characterized in that, Includes the following steps: (1) The drilling equipment is assembled on shore, and the divers carry the drilling equipment, ball valves, and spare accessories to the drilling area; (2) Use a shovel to clear away marine organisms at the location where the drilling device is to be installed on the hull to ensure that the hull at the drilling location is flat. (3) After adjusting the drilling device to the planned position, close the handle of the three small magnets to initially position and fix the drilling device; (4) Close the large magnet handle so that the drilling device is firmly attached to the surface of the hull; (5) Rotate the four Torx screws one by one to tighten the bolts against the hull to prevent the base from tilting and shaking due to the reaction force during the drilling stage because the hull is uneven. (6) After the drilling device is fixed, connect the hydraulic power pipe to the hydraulic pipe joint of the drilling machine. Start drilling the first fixing hole of the opening flange by rotating the hand crank of the drilling machine. During the drilling process, pay attention to continuously pulling out the chips and cleaning them. (7) After the hole is pierced, the round nut is stopped on the flange with its boss, and the drill bit cannot continue to drill in. Tighten the round nut to open the expansion sleeve on the drill rod at the position of the hull plate, and the drill rod is tightened on the flange and the hull plate. (8) After loosening the drill bit with an internal hexagonal socket and withdrawing the drill, complete the drilling of the first fixing hole of the flange and fix the flange. (9) After the first flange fixing hole is drilled and fixed, the drilling of the second flange fixing hole begins; (10) Turn off the switches of the large magnet and the small magnet, and retract the four corner Torx screw handwheels into the bottom plate of the drilling device; (11) Using the drilled flange as the central axis, rotate the base plate 90 degrees along the outer ring of the flange to the second fixed hole position; (12) Install the second set of drill bit assembly, and test the tightening to check whether the center of the drill bit is concentric with the second hole; (13) Begin drilling the second hole until drilling the hull plate; (14) Repeat the operation of the first hole to tighten the flange; at this point, the flange is completely positioned with the two bolts in place. (15) Repeat the above operation to complete the drilling and fastening of the 3rd and 4th holes of the drilled flange. At this point, the drilled flange is fixed to the hull by bolts. (16) Install the ball valve onto the perforated flange using a nut, and then open the ball valve; (17) By turning the handwheel, push the drill slide block to the center position of the drill bit aligned with the flange, adjust the drill to the appropriate operable direction, and then close the small magnet and large magnet handles to firmly attract the hull plate. (18) Adjust the Torx screws one by one according to the actual installation situation so that the bolts are tightened on the hull to prevent the base from tilting and shaking due to the reaction force during the drilling stage because the hull is uneven. (19) Drilling begins after the drill bit passes through the center of the ball valve by rotating the hand crank of the drill rig; (20) After drilling is completed, quickly pull out the drill bit and close the ball valve to prevent oil leakage; (21) After the oil well drilling is completed, the drilling equipment is dismantled. (22) Push the three positioning locking rods on the bottom plate of the drilling device outward and fix them in the normally open position; (23) Pull out the hydraulic line and the connection joint of the drilling machine, loosen the small magnet and the large magnet, remove the limit switch of the opening flange, leave the opening flange and ball valve on the hull, and then remove and recycle the bottom plate along with the opening device.

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