Screw drilling tool for natural gas exploitation

Abstract

The invention belongs to the technical field of drilling tools, and particularly relates to a screw drilling tool for natural gas exploitation, which comprises a shell, a transmission shaft is rotatably connected in the shell, a drill bit is mounted at the bottom end of the transmission shaft, and a connector is arranged above the shell; a group of symmetrical rotating shells are arranged between the shell and the connector, rotating columns are fixed to the bottom ends of the rotating shells and rotationally connected to the interior of the top end of the shell, butt joint shells are fixed to the top ends of the rotating shells, and threaded grooves matched with the butt joint shells are formed in the bottom end of the connector; a stator is arranged between the two rotating shells, a rotor is arranged in the stator, and the bottom end of the rotor is connected with a transmission shaft through a universal shaft; wherein the stator is fixed between the shell and the connector through the two rotating shells; the stator is fixed through the two rotating shells, the stator is fixed to the outer side of the rotor through fixing of the connector and the butt joint shell, the stator can be taken out and replaced only by unscrewing the connector when the stator is replaced, and operation is more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling tools, in particular to a screw drilling tool for natural gas exploitation. Background Art

[0002] Natural gas is a combustible gas that is often used in our daily lives. When natural gas is mined, it is necessary to drill holes at the mining location. At this time, screw drills are used. Screw drills use fluid as power and spray water while driving the drill to drill holes, which can effectively reduce the wear of the drill bit.

[0003] A Chinese patent with the existing publication number CN108131097B discloses a reversing shaft for screw drilling tools used in oil and natural gas development, including a motor and a rotor. The rotor will simultaneously revolve and rotate. The rotor contacts the second self-lubricating sleeve during rotation to ensure smoothness and stability during rotation. The revolution of the rotor drives the eccentric shaft seat to perform circular motion within the outer sleeve, thereby causing the eccentric shaft seat to rotate on a fixed axis through the eccentric shaft structure.

[0004] During use, the above technical solution requires fluid to pass through the gap between the rotor and the stator to drive the rotor to rotate. However, the stator is made of rubber and needs to be replaced after about 150 to 200 hours of use. When replacing the stator, all internal parts need to be removed, which is a more troublesome operation.

[0005] To this end, the present invention provides a screw drill for natural gas development. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a screw drill for natural gas extraction according to the present invention comprises a housing, a transmission shaft is rotatably connected to the interior of the housing, a drill bit is installed at the bottom end of the transmission shaft, and a connector is provided above the housing; A set of symmetrical rotating shells is provided between the outer shell and the connector. A rotating column is fixed to the bottom end of the rotating shell. The rotating column is rotatably connected to the top end of the outer shell. A docking shell is fixed to the top end of the rotating shell. A threaded groove matching the docking shell is provided at the bottom end of the connector. A stator is provided between the two rotating shells, a rotor is provided inside the stator, and the bottom end of the rotor is connected to the transmission shaft through a universal shaft; In this case, the stator is fixed between the housing and the connection head by two rotating shells.

[0008] Preferably, the internal thread connection of the rotating shell is connected to the main screw, and two sets of auxiliary screws are provided on both sides of the main screw, and the auxiliary screws are also threadedly connected to the rotating shell. The top of the shell is provided with a screw hole matching the bottom ends of the main screw and the auxiliary screw, and the bottom ends of the main screw and the auxiliary screw can be threadedly connected to the screw hole. The top ends of the main screw and the auxiliary screw are fixed with a third gear, which is rotatably connected to the inside of the docking shell, and one side of the third gear extends from the inside of the docking shell to the outside. The bottom end of the thread groove of the connector is provided with a circle of teeth, which can be meshed with multiple third gears through the teeth. When the connector is threadedly connected to the docking shell, the teeth drive the third gear to rotate.

[0009] Preferably, grooves are provided on both sides of the rotating shell, and grooves are also provided on the bottom end of the rotating shell and the top end of the docking shell, and inflatable sealing rings are embedded in the interior of the grooves.

[0010] Preferably, auxiliary screws are provided on both sides of the main screw, pistons are provided inside the auxiliary screws, a telescopic rod is fixed to the top end of the piston, an air guide tube is fixed to the bottom end of the auxiliary screw, and the other end of the air guide tube is connected to the inside of the inflatable sealing ring; When the piston rises, air is pumped out of the inflatable sealing ring, and when the piston descends, air is inflated into the inflatable sealing ring.

[0011] Preferably, the outer side of the main screw is rotatably connected to a lifting block, the lifting block is slidably connected to the inside of the rotating shell, and both sides of the bottom end of the lifting block are fixedly connected to the top ends of the two telescopic rods.

[0012] Preferably, a plurality of chutes are provided at the bottom end of the drill bit, a rotating block is slidably connected to the inside of the chutes, a liquid inlet channel is provided at the top end of the drill bit, a plurality of guide tubes are provided at the bottom end of the liquid inlet channel, and the bottom end opening of the guide tube is arranged between the two rotating blocks; The outer diameter of the drill bit can be enlarged by sliding the rotating block from the inside of the slide groove of the drill bit to the outside.

[0013] Preferably, the drill bit is internally rotatably connected to a plurality of second gears, a second screw is fixed to a side of the second gear close to the rotating block, a connecting hole is opened on a side of the rotating block close to the second gear, the second screw is threadedly connected to the inside of the connecting hole, and a hexagonal rotating block is rotatably connected to one side of the drill bit; The rotation of the hexagonal screw block can drive the second gear to drive the second screw to rotate.

[0014] Preferably, a worm is fixed to one end of the hexagonal screw block close to the center of the drill bit, and a worm wheel is rotatably connected to the middle part of the drill bit. One side of the worm wheel is meshed with the worm, and a gear ring is fixed to the bottom end of the worm wheel. The bottom end of the gear ring is meshed with multiple second gears.

[0015] Preferably, an adjusting groove is provided in the middle of the flow guide pipe, and a push block is slidably connected to the inside of the adjusting groove.

[0016] Preferably, the drill bit is internally rotatably connected with a plurality of first gears, the bottom end of the first gear is meshedly connected with the top end of the gear ring, the side of the first gear close to the push block is fixed to the first screw, and the first screw is threadedly connected to the push block.

[0017] The beneficial effects of the present invention are as follows: 1. The screw drill for natural gas extraction described in the present invention fixes the stator by two rotating shells, and fixes the stator to the outside of the rotor by a connector and a docking shell. When replacing the stator, it only needs to unscrew the connector to remove the stator for replacement, which makes the operation more convenient.

[0018] 2. The screw drill tool for natural gas extraction described in the present invention is configured to be movable by rotating a block inside the drill bit, so that the drill bit can adjust the current drilling diameter according to usage conditions and automatically adjust the water output of the guide pipe through the push block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a perspective view of the present invention; Figure 2 It is a partial exploded view of the present invention; Figure 3 Schematic diagram of the stator structure in the present invention; Figure 4 Schematic diagram of the rotating shell structure in the present invention; Figure 5 It is a schematic diagram of the structure of the inflatable sealing ring in the present invention; Figure 6 Schematic diagram of the main screw structure of the present invention; Figure 7 It is a schematic diagram of the drill bit structure of the present invention; Figure 8 It is a schematic diagram of the ring gear structure in the present invention; Figure 9 It is a schematic diagram of the structure of the rotating block in the present invention; Figure 10 It is a schematic diagram of the internal structure of the drill bit in the present invention.

[0021] In the figure: 1. outer shell; 11. transmission shaft; 12. connector; 13. stator; 14. rotor; 2. drill bit; 21. rotating block; 211. connecting hole; 22. hexagonal rotating block; 221. worm; 23. ring gear; 231. worm gear; 24. push block; 241. first screw; 242. first gear; 25. second gear; 251. second screw; 26. liquid inlet channel; 261. guide tube; 262. adjusting groove; 3. rotating shell; 31. docking shell; 32. inflation seal ring; 321. air guide tube; 322. inflation tube; 323. piston; 324. telescopic rod; 33. main screw; 331. third gear; 332. auxiliary screw; 333. lifting block; 34. rotating column. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 4 As shown, a screw drill for natural gas extraction according to an embodiment of the present invention includes a housing 1, a transmission shaft 11 is rotatably connected to the interior of the housing 1, a drill bit 2 is mounted on the bottom end of the transmission shaft 11, and a connector 12 is provided above the housing 1; A symmetrical set of rotating shells 3 is provided between the housing 1 and the connector 12. A rotating post 34 is fixed to the bottom end of the rotating shell 3. The rotating post 34 is rotatably connected to the top end of the housing 1. A docking shell 31 is fixed to the top end of the rotating shell 3. The bottom end of the connector 12 is provided with a threaded groove that matches the docking shell 31. A stator 13 is provided between the two rotating shells 3, a rotor 14 is provided inside the stator 13, and the bottom end of the rotor 14 is connected to the transmission shaft 11 through a universal shaft; The stator 13 is fixed between the housing 1 and the connector 12 via two rotating shells 3; When natural gas is mined, it is necessary to drill holes in the ground. A screw drill is required for drilling holes in the ground. The screw drill can drive the rotor of the drill to rotate through fluid, and at the same time, the fluid is ejected to reduce the friction between the drill bit 2 and the soil. When in use, the initial state of the drill is that the connector 12 is fixed at the top position of the docking shell 31, and the drill bit 2 is installed at the bottom end of the transmission shaft 11. Then the top of the connector 12 is connected to the connecting end of the drilling rig. Then the drilling rig controls the connecting end to drive the outer shell 1 to move, and the outer shell 1 drives the drill bit 2 to the drilling position. Then the drilling rig inputs fluid into the interior of the connector 12. After entering the interior of the connector 12, the fluid flows to the position of the stator 13, and then the fluid enters the interior of the stator 13. At this time, the liquid flows through the outer surface of the rotor 14, and the rotor 14 is rotated inside the stator 13 under the push of the fluid pressure, and the rotor 14 is inside the stator 13. The eccentric position of the rotor 14 rotates against the inner wall of the stator 13. Therefore, when the rotor 14 rotates, the bottom will be transmitted through the universal axial transmission shaft 11, so that the eccentric rotation of the rotor 14 can drive the transmission shaft 11 to rotate non-eccentrically inside the shell 1. At this time, the transmission shaft 11 drives the drill bit 2 to rotate, and the drill bit 2 contacts the ground to drill the ground. At the same time, the fluid flowing through the inside of the stator 13 will enter the inside of the transmission shaft 11 through the shell 1. The fluid is input into the inside of the drill bit 2 through the transmission shaft 11, and the drill bit 2 sprays the fluid from the bottom. On the one hand, the sprayed fluid can reduce the friction between the drill bit 2 and the soil. On the other hand, the outer diameter of the drill bit 2 will be larger than the outer diameter of the shell 1, so that the inner diameter of the pipe drilled by the drill bit 2 in the ground can be larger than the outer diameter of the shell 1. The fluid can bring the soil debris generated by drilling to the ground through the gap between the drilling pipe and the shell 1, thereby realizing drilling and chip removal at the same time. When the stator 13 has been used for about 150 to 200 hours, it will become unusable due to friction. At this time, the stator 13 needs to be replaced. During the replacement of the stator 13, the connector 12 needs to be disassembled and separated from the drilling rig first, and then the connector 12 is screwed in the opposite direction of the drilling while fixing the outer shell 1 so that the connector 12 can be unscrewed from the top of the docking shell 31. Then, the two rotating shells 3 are rotated to both sides so that the two rotating shells 3 can be separated from the outer side of the stator 13. At this time, the stator 13 can be removed from the outer side of the rotor 14, and then a new stator 13 is put on the outside of the rotor 14. Then, the two rotating shells 3 are rotated toward the position of the stator 13 so that the two rotating shells 3 wrap the stator 13 between them. Then, the connector 12 is screwed onto the outside of the docking shell 31 in the direction of the hole rotation. At this time, the two rotating shells 3 can be fixed. In this way, the stator 13 can be replaced by only removing the connector 12, which reduces the steps of replacing the stator 13 and makes replacement more convenient.

[0024] like Figures 1 to 6As shown, the internal thread connection of the rotating shell 3 is connected to the main screw 33, and two sets of auxiliary screws 332 are provided on both sides of the main screw 33, and the auxiliary screws 332 are also threadedly connected to the rotating shell 3. The top of the outer shell 1 is provided with a screw hole that matches the bottom ends of the main screw 33 and the auxiliary screw 332. The bottom ends of the main screw 33 and the auxiliary screw 332 can be threadedly connected to the screw holes. The tops of the main screw 33 and the auxiliary screw 332 are fixed with a third gear 331. The third gear 331 is rotatably connected to the interior of the docking shell 31, and one side of the third gear 331 extends from the interior of the docking shell 31 to the outside. The bottom end of the thread groove of the connecting head 12 is provided with a circle of teeth, which can be meshed with multiple third gears 331 through the teeth. When the connector 12 is threadedly connected to the docking housing 31, the third gear 331 is driven to rotate by the teeth. When the connector 12 is connected to the docking shell 31, the main screw 33 and the third gear 331 are both threadedly connected to the screw hole of the outer shell 1. When the connector 12 needs to be unscrewed from the outside of the docking shell 31, the teeth inside the threaded groove of the connector 12 drive the third gear 331 to rotate. When the third gear 331 rotates, it also drives the main screw 33 and the auxiliary screw 332 to rotate. At this time, the main screw 33 and the auxiliary screw 332 rise upward from the inside of the rotating shell 3. At the same time, the bottom ends of the main screw 33 and the auxiliary screw 332 are separated from the screw hole at the top of the outer shell 1, and the rotating shell 3 and the outer shell 1 are released. When the stator 13 is replaced, the connector 12 needs to be screwed onto the outside of the docking shell 31. At this time, the teeth inside the threaded groove drive the third gear 331 to rotate in the opposite direction, so that the third gear 331 can drive the main screw 33 and the auxiliary screw 332 to rotate in the opposite direction. At this time, the main screw 33 and the auxiliary screw 332 will move downward from the inside of the rotating shell 3, and at the same time, the bottom ends of the main screw 33 and the auxiliary screw 332 will be screwed into the screw hole at the top of the outer shell 1. At this time, the rotating shell 3 and the outer shell 1 can be fixed, so that the rotating shell 3 can be more stably connected to the outer shell 1 during use.

[0025] like Figures 1 to 5 As shown, grooves are provided on both sides of the rotating shell 3, and grooves are also provided at the bottom end of the rotating shell 3 and the top end of the docking shell 31. An inflatable sealing ring 32 is embedded inside the grooves. When the two rotating shells 3 are closed, there will be a gap between them, which can easily cause fluid to overflow during use. To prevent this problem, an inflatable sealing ring 32 is provided on the outside of the two rotating shells 3. The inflatable sealing ring 32 can fill the gap between the two rotating shells 3 to prevent fluid from overflowing. At the same time, it can fill the gap between the rotating shells 3 and the connector 12 and the outer shell 1 to prevent fluid from overflowing during use, causing insufficient fluid pressure inside the stator 13 and affecting the rotation of the rotor 14.

[0026] like Figures 1 to 6As shown, auxiliary screws 332 are provided on both sides of the main screw 33, and pistons 323 are provided inside the auxiliary screws 332. A telescopic rod 324 is fixed to the top of the piston 323, and an air guide tube 321 is fixed to the bottom of the auxiliary screw 332. The other end of the air guide tube 321 is connected to the inside of the inflatable sealing ring 32; When the piston 323 rises, the air inside the inflatable sealing ring 32 is evacuated, and when the piston 323 descends, the air inside the inflatable sealing ring 32 is inflated. When the inflatable sealing ring 32 seals the gap of the rotating shell 3, it may not be tight enough. In the initial state, the telescopic rod 324 drives the piston 323 to the highest point inside the inflatable tube 322. When the main screw 33 moves downward, it drives the telescopic rod 324. At this time, the telescopic rod 324 pushes the piston 323 downward. The piston 323 squeezes out the gas inside the inflatable tube 322 and inputs it into the inflatable sealing ring 32 through the air guide tube 321. At this time, the inflatable sealing ring 32 is inflated and the gap of the rotating shell 3 is filled. When the stator 13 is replaced, the rotating shell 3 needs to be moved. Before that, the main screw 33 will move upward due to the unscrewing of the connector 12. At this time, the main screw 33 will drive the telescopic rod 324 to pull the piston 323 upward. When the piston 323 moves upward, the air inside the air guide tube 321 will be extracted through the inflation tube 322. The air inside the inflation sealing ring 32 enters the interior of the inflation tube 322 through the air guide tube 321. At this time, the inflation sealing ring 32 can be contracted, which makes it easier to separate the two rotating shells 3 from the outer shell 1 and the connector 12.

[0027] like Figures 1 to 6 As shown, the outer side of the main screw 33 is rotatably connected to a lifting block 333, and the lifting block 333 is slidably connected to the inside of the rotating shell 3. The two sides of the bottom end of the lifting block 333 are fixedly connected to the top ends of the two telescopic rods 324; When the two rotating shells 3 need to be fixed to the connecting head 12, the connecting head 12 drives the main screw 33 to rotate through the third gear 331. At this time, the main screw 33 will move downward, and at the same time, the lifting block 333 will move downward. The lifting block 333 is slidably connected to the rotating shell 3, and the lifting block 333 is rotatably connected to the main screw 33, so that the lifting block 333 will not rotate when moving downward. At this time, the lifting block 333 will drive the telescopic rod 324 to move downward, and the inflation tube 322 can output air. When the rotating shell 3 is separated, the main screw 33 will be driven to move upward, and the main screw 33 drives the lifting block 333 to move upward. At the same time, the lifting block 333 drives the telescopic rod 324 to move upward, and the air in the inflation tube 322 can be evacuated.

[0028] like Figures 1 to 10As shown, the bottom end of the drill bit 2 is provided with a plurality of chutes, the interior of which is slidably connected to a rotating block 21, the top end of the drill bit 2 is provided with a liquid inlet channel 26, the bottom end of the liquid inlet channel 26 is provided with a plurality of guide tubes 261, and the bottom end opening of the guide tube 261 is arranged between the two rotating blocks 21; The rotating block 21 slides from the inside of the slide groove of the drill bit 2 to the outside to expand the outer diameter of the drill bit 2; When the drill bit 2 drills a hole in the ground, the fluid is input into the liquid inlet channel 26 through the transmission shaft 11, and the liquid inlet channel 26 inputs the fluid into the guide tube 261. The guide tube 261 can spray the fluid to the bottom of the drill bit 2. At the same time, the drill bit 2 drives the rotating block 21 to rotate to drill a hole in the soil on the current ground. When a larger hole diameter needs to be drilled, multiple rotating blocks 21 are slid outward by the same distance. At this time, the outer diameter of the object composed of multiple rotating blocks 21 is larger, and a larger hole diameter will be generated when the rotating block 21 drills a hole.

[0029] like Figures 1 to 10 As shown, the drill bit 2 is internally rotatably connected to a plurality of second gears 25. A second screw 251 is fixed to the side of the second gear 25 close to the rotating block 21. A connecting hole 211 is formed on the side of the rotating block 21 close to the second gear 25. The second screw 251 is threadedly connected to the inside of the connecting hole 211. A hexagonal rotating block 22 is rotatably connected to one side of the drill bit 2. The rotation of the hexagonal screw block 22 can drive the second gear 25 to drive the second screw 251 to rotate; When it is necessary to move the rotating block 21 outward, the hexagonal rotating block 22 is screwed by a tool. At this time, the hexagonal rotating block 22 can drive the multiple second gears 25 to rotate, and the second gear 25 drives the second screw 251 to rotate inside the connecting hole 211. At this time, the connecting hole 211 drives the rotating block 21 to slide inside the slide groove of the drill bit 2, which can expand the outer diameter of the object composed of the multiple rotating blocks 21. When a smaller outer diameter is required, the hexagonal rotating block 22 can be rotated in the opposite direction.

[0030] like Figures 1 to 10 As shown, a worm 221 is fixed to one end of the hexagonal rotating block 22 near the center of the drill bit 2, and a worm gear 231 is rotatably connected to the middle part of the drill bit 2. One side of the worm gear 231 is meshed with the worm 221, and a ring gear 23 is fixed to the bottom end of the worm gear 231. The bottom end of the ring gear 23 is meshed with multiple second gears 25. When the hexagonal rotating block 22 rotates, it drives the worm 221 to rotate. At this time, the worm 221 drives the worm wheel 231 to rotate. The worm wheel 231 drives the ring gear 23 at the bottom to rotate. The ring gear 23 can simultaneously drive multiple second gears 25 to rotate. At this time, the rotating block 21 can adjust its position at the same time.

[0031] like Figures 1 to 10As shown, an adjustment groove 262 is opened in the middle of the guide tube 261, and a push block 24 is slidably connected inside the adjustment groove 262; When the rotating block 21 is extended, the outer diameter of the drill bit 2 as a whole increases. At this time, the rotor 14 needs to be pushed with greater force, and the guide tube 261 needs to spray more fluid to assist drilling. In the initial state, the rotating block 21 is not extended, and the push block 24 forms a smaller aperture inside the adjustment groove 262. When the fluid passes through the guide tube 261, the push block 24 blocks the cross-section of the guide tube 261, resulting in a lower flow velocity inside the guide tube 261. At this time, the amount of water sprayed out of the guide tube 261 is less. When the rotating block 21 extends outward, the pushing block 24 simultaneously moves in the direction away from the guide tube 261 inside the regulating groove 262. At this time, the internal cross-section of the guide tube 261 is larger, the flow velocity inside it is higher, and the amount of water sprayed out of the guide tube 261 is also greater. At this time, the longer the rotating block 21 extends, the greater the amount of water sprayed from the guide tube 261. At the same time, the water outlet pressure of the drilling rig is controlled to prevent the water pressure inside the housing 1 from exceeding the limit.

[0032] like Figures 1 to 10 As shown, the drill bit 2 is internally rotatably connected to a plurality of first gears 242 , the bottom ends of the first gears 242 are meshedly connected to the top ends of the gear ring 23 , and the side of the first gears 242 close to the push block 24 is fixed to the first screw 241 , which is threadedly connected to the push block 24 ; When the ring gear 23 drives the second gear 25 to rotate and adjust the position of the rotating block 21, it will also drive the first gear 242 to rotate. The rotation of the first gear 242 drives the first screw 241 to rotate. At this time, the first screw 241 drives the push block 24 to move inside the adjustment slot 262, so that the position of the push block 24 can be automatically adjusted accordingly when the rotating block 21 is adjusted.

[0033] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw drill for natural gas production, characterized by: The housing comprises a transmission shaft which is rotatably connected to the interior of the housing, a drill bit is installed at the bottom end of the transmission shaft, and a connector is provided above the housing; A set of symmetrical rotating shells is provided between the outer shell and the connector. A rotating column is fixed to the bottom end of the rotating shell. The rotating column is rotatably connected to the top end of the outer shell. A docking shell is fixed to the top end of the rotating shell. A threaded groove matching the docking shell is provided at the bottom end of the connector. A stator is provided between the two rotating shells, a rotor is provided inside the stator, and the bottom end of the rotor is connected to the transmission shaft through a universal shaft; In this case, the stator is fixed between the housing and the connection head by two rotating shells.

2. The screw drill for natural gas production according to claim 1, characterized in that: The internal thread connection of the rotating shell is connected to the main screw, and two sets of auxiliary screws are provided on both sides of the main screw. The auxiliary screws are also threadedly connected to the rotating shell. The top of the shell is provided with a screw hole that matches the bottom ends of the main screw and the auxiliary screw. The bottom ends of the main screw and the auxiliary screw can be threadedly connected to the screw holes. The tops of the main screw and the auxiliary screw are fixed with a third gear. The third gear is rotatably connected to the inside of the docking shell, and one side of the third gear extends from the inside of the docking shell to the outside. The bottom end of the thread groove of the connector is provided with a circle of teeth, which can be meshed with multiple third gears through the teeth. When the connector is threadedly connected to the docking shell, the teeth drive the third gear to rotate.

3. The screw drill for natural gas production according to claim 1, characterized in that: Grooves are provided on both sides of the rotating shell, and grooves are also provided on the bottom end of the rotating shell and the top end of the docking shell. Inflatable sealing rings are embedded in the grooves.

4. The screw drill for natural gas production according to claim 3, characterized in that: Auxiliary screws are provided on both sides of the main screw, a piston is provided inside the auxiliary screw, a telescopic rod is fixed to the top of the piston, an air guide tube is fixed to the bottom of the auxiliary screw, and the other end of the air guide tube is connected to the inside of the inflatable sealing ring; When the piston rises, air is pumped out of the inflatable sealing ring, and when the piston descends, air is inflated into the inflatable sealing ring.

5. The screw drill tool for natural gas production according to claim 4, characterized in that: The outer side of the main screw is rotatably connected to a lifting block, the lifting block is slidably connected to the inside of the rotating shell, and both sides of the bottom end of the lifting block are fixedly connected to the top ends of the two telescopic rods.

6. The screw drill tool for natural gas production according to claim 1, characterized in that: The bottom end of the drill bit is provided with a plurality of chutes, the interior of the chutes is slidably connected to a rotating block, the top end of the drill bit is provided with a liquid inlet channel, the bottom end of the liquid inlet channel is provided with a plurality of guide tubes, and the bottom end opening of the guide tube is provided between the two rotating blocks; The outer diameter of the drill bit can be enlarged by sliding the rotating block from the inside of the slide groove of the drill bit to the outside.

7. The screw drill tool for natural gas production according to claim 6, characterized in that: The drill bit is internally rotatably connected to a plurality of second gears, a second screw is fixed to a side of the second gear close to the rotating block, a connecting hole is opened on a side of the rotating block close to the second gear, the second screw is threadedly connected to the inside of the connecting hole, and a hexagonal rotating block is rotatably connected to one side of the drill bit; The rotation of the hexagonal screw block can drive the second gear to drive the second screw to rotate.

8. The screw drill tool for natural gas production according to claim 7, characterized in that: A worm is fixed to one end of the hexagonal screw block near the center of the drill bit, and a worm wheel is rotatably connected to the middle part of the drill bit. One side of the worm wheel is meshed with the worm, and a gear ring is fixed to the bottom end of the worm wheel. The bottom end of the gear ring is meshed with multiple second gears.

9. The screw drill tool for natural gas production according to claim 6, characterized in that: An adjusting groove is provided in the middle of the flow guide pipe, and a push block is slidably connected inside the adjusting groove.

10. The screw drill tool for natural gas production according to claim 9, characterized in that: The drill bit is internally rotatably connected with a plurality of first gears, the bottom end of the first gear is meshed with the top end of the gear ring, the side of the first gear close to the push block is fixed to the first screw, and the first screw is threadedly connected to the push block.

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