An adjustable hole expansion device for oil production

Abstract

The present invention relates to the technical field of oil production, and specifically to an adjustable hole expanding device for oil production, comprising a lifting rod, an outer wall sleeve of the lower end of the lifting rod is provided with a driving motor, a positioning shell is fixedly installed at the output end of the lower end of the driving motor, and the lifting rod is rotatably connected to the positioning shell, and the lower end of the positioning shell is evenly distributed with three connecting rods along the center of the positioning shell, and the lower end of each of the connecting rods is commonly fixedly connected with a drill bit, and the upper end of the drill bit is evenly provided with three sliding cavities along the center of the drill bit. The present invention uses a cylinder to push an excavator and a compacting wheel to expand a hole, and at the same time drives an eccentric column to rotate through a motor, so that a compacting cylinder is shaken to compact the inner wall of the hole, and then the mud on the outer surface of the compacting cylinder is cleaned off by a mud scraping structure, and then stirred into mud to cool the drill bit and the digging rod, and attached to the inner wall of the hole to improve firmness.

Description

Technical Field

[0001] The invention relates to the technical field of oil production, in particular to an adjustable hole expanding device used for oil production. Background Art

[0002] Oil extraction refers to the act of digging and extracting oil from places where oil is stored. In the process of oil extraction, oil and gas flow from the reservoir to the bottom of the well, and then rise from the bottom of the well to the wellhead. In order to meet the needs of oil extraction, it is usually necessary to dig a smaller mine first, and then expand it on the basis of this mine so that people or equipment can pass through, so as to carry out subsequent extraction operations.

[0003] However, in the process of hole expansion, the single expansion of the hole can easily lead to the inner wall of the hole being not tight enough. In the subsequent mining and installation of equipment, the vibration generated by the operation of the equipment can easily cause the inside of the hole to collapse. In addition, in the process of hole expansion, the mud is transported from the ground to the inside of the hole by a mud pump. Due to the continuous extension of the pipeline, the pipeline is prone to blockage, thereby reducing the hole expansion efficiency. Summary of the invention

[0004] The purpose of the invention is to provide a subject matter to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable hole-expanding device for oil extraction, comprising a lifting rod, an outer wall sleeve of the lower end of the lifting rod is provided with a driving motor, a positioning shell is fixedly installed at the output end of the lower end of the driving motor, and the lifting rod is rotatably connected to the positioning shell, three connecting rods are evenly distributed at the lower end of the positioning shell along the center of the positioning shell, a drill bit is commonly fixedly connected to the lower end of each connecting rod, three sliding cavities are evenly opened at the upper end of the drill bit along the center of the drill bit, two symmetrically distributed blocking blocks are fixedly installed at the upper notch of each sliding cavity, a sliding frame is slidably connected to the inner wall of each sliding cavity, a sliding block is slidably connected to the inner wall of the sliding frame, and the sliding block is slidably connected to the lower end of the blocking block. A spring is fixedly installed between one side of the slider and the inner wall of the sliding frame, a rotating column is fixedly installed on the upper end of the slider, a cylinder is fixedly installed on one side of each sliding cavity close to the center of the drill bit, and the output end of the cylinder is fixedly connected to the outer wall of the sliding frame, a compacting cylinder is fixedly installed on the upper end of each rotating column, and the lower end of the compacting cylinder is in contact with the upper surface of the drill bit, an eccentric column is fixedly installed in the center of the compacting cylinder cavity, each outer wall of the compacting cylinder is in contact with a scraping structure, and each scraping structure is rotatably connected to the upper end of the drill bit, three excavating knives are slidably connected to the outer wall of the lower end of the drill bit, and the excavating knives are evenly spaced around the center of the drill bit, and the upper end of the excavating knife is fixedly connected to the lower end of the sliding frame.

[0006] Preferably, a connecting column is fixedly installed at the lower end of the positioning shell, and a three-way electric push rod is fixedly installed at the lower end of the connecting column. Three push rods are slidably connected to the outer wall of the three-way electric push rod, and each push rod is adapted to a compacting cylinder corresponding to the position. Each push rod is slidably connected to a sliding block on the side close to the corresponding compacting cylinder, and a spring 2 is fixedly installed between the push rod and the sliding block. A motor 1 is fixedly installed on the upper end of the sliding block, and the output end of the motor 1 passes through the sliding block and is fixedly connected to the compacting cylinder corresponding to the position.

[0007] Preferably, the mud scraping structure includes three rotating rods, each of which is rotatably connected to the upper surface of the drill bit, the lower end of each rotating rod is sleeved with a torsion spring shaft, and the torsion spring shaft is fixedly connected to the drill bit, the outer wall of the rotating rod is fixedly sleeved with an arc plate, the arc plate is fixedly installed with an arc frame at one end away from the rotating rod, the top of the inner cavity of the arc frame is rotatably connected with a spiral rod, and each spiral rod is in contact with a compacting cylinder at a corresponding position, a motor is fixedly installed at the upper end of the arc frame, the output end of the motor is fixedly connected to the spiral rod, and a scraper is provided on the side of the arc frame close to the compacting cylinder, and the scraper is in conflict with the compacting cylinder.

[0008] Preferably, the upper end of the drill bit is provided with three sliding grooves equidistantly along the center of the drill bit, and each sliding groove is adapted to a spiral rod at a corresponding position, the sliding groove is movably connected to the outer wall of the lower end of the spiral rod, a mixing chamber is provided inside the drill bit, and an oblique through hole is provided between the mixing chamber and each sliding groove.

[0009] Preferably, a motor 2 is fixedly installed inside the drill bit, and the output end of the motor 2 extends to the cavity of the stirring chamber, where a stirring blade is fixedly installed, and the stirring blade can rotate in the cavity of the stirring chamber. Three arc grooves are evenly spaced on the outer wall of the lower end of the drill bit, and each arc groove is connected to the stirring chamber, and each arc groove is slidably connected to an electric gate on the side close to the stirring chamber.

[0010] Preferably, a lifting platform is sleeved on the outer wall of the lifting rod, support frames are fixedly installed on both sides of the lifting platform, a cavity is opened inside the positioning shell, a through groove connected to the cavity is opened in the lifting rod cavity, and a water inlet pipe connected to the through groove is fixedly installed on the outer wall of the lifting platform.

[0011] Preferably, a guide wheel is fixedly mounted on the lower end of the lifting platform, a pipe reel is placed on one side of the lifting platform, a hose is sleeved on the outer side wall of the hose reel, and the output end of the hose bypasses the guide wheel and is fixedly connected to the water inlet pipe.

[0012] Preferably, each of the connecting rods is provided with a flow groove 1 inside, and each flow groove 1 is connected to the cavity, three flow grooves 2 are provided inside the drill bit at equal intervals along the center of the drill bit, and the upper groove of each flow groove 2 is connected to the flow groove 1 at the corresponding position, and the lower groove of each flow groove 2 is connected to the mixing chamber together.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The cylinder and the push rod are used to synchronously push the compacting cylinder and the excavating knife to slide away from the drill bit, thereby expanding the inner diameter of the hole. Then, the motor drives the eccentric column to rotate, causing the eccentric column to shake eccentrically. When the eccentric column shakes, the compacting cylinder will also shake with it, so that the compacting cylinder can only shake along the trajectory of the sliding frame. At the same time, the centrifugal force generated by the rotation of the drill bit increases the shaking frequency. At the same time, the centrifugal force generated by the rotation of the compacting cylinder driven by the drill bit is superimposed on the centrifugal force generated by the rotation of the eccentric column, so that the impact force of the compacting cylinder on the inner wall of the hole is increased when it shakes, and the inner wall of the hole is hit more tightly;

[0015] 2. The elastic restoring force of the torsion spring shaft drives the rotating rod to rotate. When the rotating rod rotates, it drives the arc plate to move closer to the compacting cylinder at the corresponding position, so that the scraper and the spiral rod can scrape the outer wall of the compacting cylinder together, and scrape the soil on the outer wall of the compacting cylinder to the inside of the arc frame. At the same time, when the compacting cylinder moves away from the drill bit, the compacting cylinder resists and pushes the scraper, and the scraper rotates slightly around the rotating rod, so that the scraper can always resist and scrape the surface of the compacting cylinder;

[0016] 3. The scraped soil is transferred to the inside of the sliding groove through the spiral rod, and then slides into the inside of the mixing bin through the inclined through hole, and then water is injected into the inside of the through groove through the hose, and then the water is converged into the inside of the mixing bin through flow grooves 1 and 2, and then the water and soil are mixed into mud by the stirring blades, and finally the mud is thrown out from the inner groove of the arc groove by the centrifugal force generated by the rotation of the drill bit, and the outer surface of the drill bit and the excavator is cooled by the mud. At the same time, the mud adheres to the inner wall of the hole and is compacted by the compaction cylinder, which can effectively prevent the hole from collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is an overall cutaway stereogram of the present invention;

[0020] Figure 3It is a schematic diagram of the local structure of the positioning shell of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the three-way electric push rod of the present invention after removing the positioning shell;

[0022] Figure 5 It is a schematic cross-sectional structural diagram of the rotating column of the present invention;

[0023] Figure 6 For the present invention Figure 5 A partial enlarged view of the middle A;

[0024] Figure 7 is a three-dimensional cross-sectional view of the compacting cylinder of the present invention;

[0025] Figure 8 For the present invention Figure 7 A partial enlarged view of point B in the middle;

[0026] Fig. 9 is a three-dimensional cross-sectional view of the flow tank of the present invention;

[0027] Fig.10 is a three-dimensional cross-sectional view of the spiral rod of the present invention;

[0028] Fig.11 is a three-dimensional cross-sectional view of the torsion spring shaft of the present invention;

[0029] Fig.12 For the present invention Fig.11 A local enlarged view of point C in FIG.

[0030] Fig.13 It is a planar cross-sectional view of the arc groove of the present invention.

[0031] Description of reference numerals:

[0032] 1. Lifting rod; 2. Driving motor; 3. Positioning shell; 4. Connecting rod; 5. Drill bit; 6. Sliding cavity; 7. Sliding frame; 8. Sliding block; 9. Spring 1; 10. Rotating column; 11. Blocking block; 12. Compacting cylinder; 13. Eccentric column; 14. Motor 1; 15. Three-way electric push rod; 151. Push rod; 16. Arc frame; 161. Scraper; 17. Sliding block; 18. Spring 2; 19. Digging knife; 20. Cylinder; 21. Torsion spring shaft; 22. rotating rod; 23. arc plate; 24. motor; 25. screw rod; 26. sliding groove; 27. oblique through hole; 28. mixing chamber; 29. ​​motor 2; 30. mixing blade; 31. water inlet pipe; 32. hose; 33. hose reel; 34. guide wheel; 35. through groove; 36. flow groove 1; 361. cavity; 37. flow groove 2; 38. arc groove; 39. electric gate; 40. lifting platform; 41. support frame. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 13 The present invention provides a technical solution: an adjustable reaming device for oil production, comprising a lifting rod 1, a driving motor 2 is sleeved on the outer wall of the lower end of the lifting rod 1, a positioning shell 3 is fixedly installed on the output end of the lower end of the driving motor 2, and the lifting rod 1 is rotatably connected to the positioning shell 3, three connecting rods 4 are evenly distributed at the lower end of the positioning shell 3 along the center of the positioning shell 3, a drill bit 5 is fixedly connected to the lower end of each connecting rod 4, three sliding cavities 6 are evenly opened at the upper end of the drill bit 5 along the center of the drill bit 5, two symmetrically distributed blocking blocks 11 are fixedly installed at the upper notch of each sliding cavity 6, a sliding frame 7 is slidably connected to the inner wall of each sliding cavity 6, a sliding block 8 is slidably connected to the inner wall of the sliding frame 7, and the sliding block 8 contacts the lower end of the blocking block 11, a spring 9 is fixedly installed between one side of the sliding block 8 and the inner wall of the sliding frame 7, and the upper end of the sliding block 8 A rotating column 10 is fixedly installed, and a cylinder 20 is fixedly installed on one side of each sliding cavity 6 close to the center of the drill bit 5, and the output end of the cylinder 20 is fixedly connected to the outer wall of the sliding frame 7, and a compacting cylinder 12 is fixedly installed on the upper end of each rotating column 10, and the lower end of the compacting cylinder 12 contacts the upper surface of the drill bit 5, and an eccentric column 13 is fixedly installed in the center of the compacting cylinder 12 cavity, and each compacting cylinder 12 The outer wall of each scraper structure is in contact with the upper end of the drill bit 5, and each scraper structure is rotatably connected to the upper end of the drill bit 5, and the outer wall of the lower end of the drill bit 5 is slidably connected with three excavating knives 19, and the excavating knives 19 are evenly spaced around the center of the drill bit 5, and the upper end of the excavating knife 19 is fixedly connected to the lower end of the sliding frame 7, wherein when the compacting cylinder 12 slides, the lower end of the compacting cylinder 12 is always covered between the two shielding blocks 11, thereby preventing mud chips from falling into the interior of the sliding cavity 6.

[0035] Specifically, the drive motor 2 is sleeved on the outer wall of the lifting rod 1, the shell of the drive motor 2 is fixedly connected to the lifting rod 1, and the rotating shaft of the drive motor 2 is rotatably connected to the outer wall of the lifting rod 1. When the drive motor 2 is started, the output end of the drive motor 2 will drive the positioning shell 3 at the lower end to rotate, and will not drive the lifting rod 1 to rotate together. At the same time, when the drill bit 5 expands the hole, the surrounding soil is dug up by the excavator 19, so that the compaction cylinder 12 at the upper end of the drill bit 5 can smoothly dive with the drill bit 5. At the same time, when the hole needs to be enlarged, the sliding frame 7 is pushed to slide inside the sliding cavity 6 by the cylinder 20. When the sliding frame 7 slides, it drives the excavator 19 to expand in the direction away from the drill bit 5, thereby expanding the inner diameter of the hole by excavation.

[0036] Among them, a connecting column is fixedly installed at the lower end of the positioning shell 3, and a three-way electric push rod 15 is fixedly installed at the lower end of the connecting column. Three push rods 151 are slidably connected to the outer wall of the three-way electric push rod 15, and each push rod 151 is adapted to the compacting cylinder 12 corresponding to the position, and each push rod 151 is slidably connected to a sliding block 17 on the side close to the corresponding compacting cylinder 12. A spring 2 18 is fixedly installed between the push rod 151 and the sliding block 17, and a motor 14 is fixedly installed on the upper end of the sliding block 17. The output end of the motor 14 passes through the sliding block 17 and is fixedly connected to the compacting cylinder 12 corresponding to the position.

[0037] Specifically, the push rod 151 is an output rod on the three-way electric push rod 15, and the push rod 151 moves synchronously with the output end of the cylinder 20. Fig.12As shown, a slide groove is provided at one end of the push rod 151 away from the three-way electric push rod 15, and the sliding block 17 can slide inside the slide groove, and the spring 2 18 limits the sliding range of the sliding block 17. When the motor 14 is started and drives the compacting cylinder 12 to rotate, the eccentric column 13 inside the compacting cylinder 12 will rotate synchronously. Since the eccentric column 13 is an eccentric structure, when the eccentric column 13 rotates, the center of gravity will be unstable due to the excessive weight of one side, so that the eccentric column 13 drives the compacting cylinder 12 to shake together. When the compacting cylinder 12 shakes, the sliding frame 7 and the push rod 151 will limit the compacting cylinder 12, so that the compacting cylinder 12 can only shake in two directions away from the drill bit 5 and close to the drill bit 5. At the same time, the spring 1 9 and the spring 2 18 will reset the compacting cylinder 12, so that the compacting cylinder 12 will continuously shake and hit the inner wall of the hole, thereby compacting the inner wall of the enlarged hole, and at the same time, the drill bit 5 is driven to rotate by the driving motor 2, and the drill bit 5 drives the compacting cylinder 12 to rotate around the center of the lifting rod 1, and the centrifugal force generated by the weight of the compacting cylinder 12 itself will throw the compacting cylinder 12 away from the drill bit 5 again, and the centrifugal force generated by the rotation of the eccentric column 13 will push the compacting cylinder 12 back to its original position again, so that the reciprocating movement further increases the shaking frequency of the compacting cylinder 12, and if the eccentric column 13 throws the compacting cylinder 12 out synchronously with the drill bit 5, the impact force of the compacting cylinder 12 on the inner wall of the hole will be increased, thereby pressing the inner wall of the expanded hole more tightly.

[0038] The scraping structure includes three rotating rods 22, each of which is rotatably connected to the upper surface of the drill bit 5, and the lower end of each rotating rod 22 is sleeved with a torsion spring shaft 21, and the torsion spring shaft 21 is fixedly connected to the drill bit 5. The outer wall of the rotating rod 22 is fixedly sleeved with an arc plate 23, and the arc plate 23 is fixedly installed with an arc frame 16 at one end away from the rotating rod 22, and the side notches of each arc frame 16 are in conflict with the compacting cylinder 12 at the corresponding position, and the inner cavity top of the arc frame 16 is rotatably connected with a spiral rod 25, and the upper end of the arc frame 16 is fixed. A motor 24 is installed, and the output end of the motor 24 is fixedly connected to the screw rod 25. A scraper 161 is provided on the side of the arc frame 16 close to the compacting cylinder 12, and the scraper 161 is in conflict with the compacting cylinder 12. Three sliding grooves 26 are equidistantly provided at the upper end of the drill bit 5 along the center of the drill bit 5, and each sliding groove 26 is adapted to the screw rod 25 corresponding to the position. The sliding groove 26 is movably connected to the outer wall of the lower end of the screw rod 25. A mixing chamber 28 is provided inside the drill bit 5, and an oblique through hole 27 is provided between the mixing chamber 28 and each sliding groove 26.

[0039] Specifically, refer to Figure 7Each compacting cylinder 12 rotates counterclockwise, so that the soil on the surface of the compacting cylinder 12 can be scraped by the scraper 161 and fall into the interior of the arc frame 16. Through the elastic restoring force of the rotating rod 22, each arc plate 23 is offset to the side of the corresponding compacting cylinder 12. At the same time, when the compacting cylinder 12 slides, the elastic restoring force of the rotating rod 22 causes the arc plate 23 to drive the arc frame 16 to rotate slightly, thereby adapting to the movement of the compacting cylinder 12 and continuing to scrape its surface, so that the scraper The scraper 161 always contacts the outer wall of the compacting cylinder 12, and there is a reserved space between the arc frame 16 and the compacting cylinder 12, so that the soil attached to the surface of the compacting cylinder 12 can pass smoothly and allow the scraper 161 to scrape the soil. At the same time, the spiral rod 25 will also produce a scraping effect with the outer wall of the compacting cylinder 12 during the rotation process, thereby improving the efficiency of soil falling off the surface of the compacting cylinder 12. The soil after falling off will also be affected by the centrifugal force generated by the rotation of the drill bit 5, and the soil will be thrown into the interior of the arc frame 16;

[0040] At the same time, if Fig.10 As shown, the screw rod 25 passes through the arc frame 16 to the lower notch and extends to the inside of the sliding groove 26, and the sliding groove 26 is an arc-shaped notch, so that when the screw rod 25 is moved by the thrust generated by the activity of the compacting cylinder 12, the screw rod 25 is always inside the sliding groove 26 and will not be hindered. When the soil is thrown into the inside of the arc frame 16, the motor 24 drives the screw rod 25 to rotate, and the rotation of the screw rod 25 drives the thrown soil to be transmitted to the inside of the sliding groove 26. The soil in the sliding groove 26 then falls into the inside of the inclined through hole 27, and then slides through the inclined groove of the inclined through hole 27 to the inside of the mixing chamber 28. The soil inside the inclined through hole 27 is affected by the sliding of the inclined edge and will not be thrown out by the centrifugal force generated by the rotation of the drill bit 5.

[0041] Among them, the outer wall of the lifting rod 1 is sleeved with a lifting platform 40, and support frames 41 are fixedly installed on both sides of the lifting platform 40. A cavity 361 is opened inside the positioning shell 3, and a through groove 35 connected with the cavity 361 is opened in the cavity of the lifting rod 1. A water inlet pipe 31 connected with the through groove 35 is fixedly installed on the outer wall of the lifting platform 40, and a guide wheel 34 is fixedly installed at the lower end of the lifting platform 40. A pipe reel 33 is placed on one side of the lifting platform 40, and a hose 32 is sleeved on the outer wall of the pipe reel 33. The output end of the hose 32 bypasses the guide wheel 34 and is fixedly connected to the water inlet pipe 31.

[0042] Specifically, the lifting platform 40 can drive the lifting rod 1 to slide downward. At the same time, when the lifting rod 1 slides downward, the hose reel 33 begins to release the hose 32 wrapped on the outside, and the guide wheel 34 guides the hose 32 to prevent the hose 32 from generating a lot of friction with the ground when the hose 32 is dragged down by the lifting rod 1, thereby damaging the outer surface of the hose 32.

[0043] Among them, a motor 29 is fixedly installed inside the drill bit 5, and the output end of the motor 29 extends to the cavity of the stirring chamber 28, where a stirring blade 30 is fixedly installed, and the stirring blade 30 can rotate in the cavity of the stirring chamber 28. Three arc grooves 38 are evenly spaced on the outer wall of the lower end of the drill bit 5, and each arc groove 38 is connected to the stirring chamber 28. Each arc groove 38 is slidably connected to an electric gate 39 on the side close to the stirring chamber 28. A flow groove 1 36 is opened inside each connecting rod 4, and each flow groove 1 36 is connected to the cavity 361. Three flow grooves 2 37 are evenly spaced inside the drill bit 5 along the center of the drill bit 5, and the upper notch of each flow groove 2 37 is connected to the flow groove 1 36 at the corresponding position, and the lower notch of each flow groove 2 37 is connected to the stirring chamber 28 together.

[0044] Specifically, Fig.13 As shown, the arc groove 38 is an arc shape. When the drill bit 5 rotates counterclockwise, it is blocked by the arc bevel of the arc groove 38, so it is difficult for the soil to be thrown into the arc groove 38 due to the rotation of the drill bit 5. However, if there is soil in the arc groove 38, it is easier to be thrown out. Then, water is transported to the hose 32 and the through groove 35, and then the water in the through groove 35 flows into the three flow grooves 1 36 through the cavity 361 respectively. Then, the water in the flow groove 1 36 is gathered together through the correspondingly connected flow groove 2 37 and finally flows into the mixing chamber 28, and is driven by the motor 29. The stirring blades 30 are driven to stir, so that the water and the soil inside the stirring chamber 28 are mixed to form mud. When the mud inside the stirring chamber 28 is stirred, the electric gate 39 is opened to connect the arc groove 38 with the stirring chamber 28. The centrifugal force generated by the rotation of the drill bit 5 causes the mud inside the stirring chamber 28 to be thrown out from the notch of the arc groove 38, and the surface of the drill bit 5 and the excavator 19 is cooled by the mud. At the same time, the mud adheres to the inner wall of the hole, and the vibration and impact of the compacting cylinder 12 make the inner wall of the hole more solid and less likely to collapse.

[0045] Working principle: The cylinder 20 and the push rod 151 are used to synchronously push the compacting cylinder 12 and the excavating knife 19 to slide in the direction away from the drill bit 5, thereby expanding the inner diameter of the hole, and then the motor 14 drives the eccentric column 13 to rotate, so that the eccentric column 13 produces eccentric shaking. When the eccentric column 13 shakes, the compacting cylinder 12 will also shake along with it. When the compacting cylinder 12 shakes, the sliding frame 7 limits the slider 8 connected to the compacting cylinder 12, so that the compacting cylinder 12 can only shake along the trajectory of the sliding frame 7. At the same time, the centrifugal force generated by the rotation of the drill bit 5 increases the shaking frequency. At the same time, the centrifugal force generated by the rotation of the compacting cylinder 12 driven by the drill bit 5 is superimposed on the centrifugal force generated by the rotation of the eccentric column 13, so that the impact force of the compacting cylinder 12 on the inner wall of the hole is increased when it shakes, and the inner wall of the hole is hit more tightly.

[0046] At the same time, the elastic restoring force of the torsion spring shaft 21 drives the rotating rod 22 to rotate, and the rotating rod 22 drives the arc plate 23 to move closer to the compacting cylinder 12 at the corresponding position, so that the scraper 161 and the spiral rod 25 scrape the outer wall of the compacting cylinder 12 together, and scrape the soil on the outer wall of the compacting cylinder 12 to the inside of the arc frame 16. At the same time, when the compacting cylinder 12 moves away from the drill bit 5, the compacting cylinder 12 resists and pushes the scraper 161, and the scraper 161 rotates slightly around the rotating rod 22, so that the scraper 161 can always resist and scratch the surface of the compacting cylinder 12;

[0047] Next, the scraped soil is transferred to the interior of the sliding groove 26 through the spiral rod 25, and then slides into the interior of the mixing chamber 28 through the inclined through hole 27, and then water is injected into the interior of the through groove 35 through the hose 32, and then the water is converged into the interior of the mixing chamber 28 through the flow groove 1 36 and the flow groove 2 37, and then the water and soil are mixed into mud by the stirring blade 30, and finally the mud is thrown out from the inner groove of the arc groove 38 by the centrifugal force generated by the rotation of the drill bit 5, and the outer surface of the drill bit 5 and the excavator is cooled by the mud. At the same time, the mud adheres to the inner wall of the hole and is compacted by the compaction cylinder 12, which can effectively prevent the hole from collapsing.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable hole-expanding device for oil production, comprising a lifting rod (1), the outer wall of the lower end of the lifting rod (1) is sleeved with a driving motor (2), the output end of the lower end of the driving motor (2) is fixedly mounted with a positioning shell (3), and the lifting rod (1) is rotatably connected to the positioning shell (3), characterized in that: The lower end of the positioning shell (3) is evenly distributed with three connecting rods (4) along the center of the positioning shell (3), and the lower ends of the connecting rods (4) are fixedly connected with a drill bit (5), and the upper end of the drill bit (5) is evenly opened with three sliding cavities (6) along the center of the drill bit (5), and two symmetrically distributed blocking blocks (11) are fixedly installed at the upper notch of each sliding cavity (6), and the inner wall of each sliding cavity (6) is slidably connected with a sliding frame (7), and the inner wall of the sliding frame (7) is slidably connected with a sliding block (8), and the sliding block (8) is in contact with the lower end of the blocking block (11), and a spring (9) is fixedly installed between one side of the sliding block (8) and the inner wall of the sliding frame (7), and a rotating column (10) is fixedly installed on the upper end of the sliding block (8), and each sliding cavity (6) is slidably connected with a sliding frame (7), and the inner wall of the sliding frame (7) is slidably connected with a sliding block (8), and the sliding block (8) is in contact with the lower end of the blocking block (11), and a spring (9) is fixedly installed between one side of the sliding block (8) and the inner wall of the sliding frame (7), and a rotating column (10) is fixedly installed on the upper end of the sliding block (8), and each sliding A cylinder (20) is fixedly installed on one side of the cavity (6) close to the center of the drill bit (5), and the output end of the cylinder (20) is fixedly connected to the outer wall of the sliding frame (7). A compacting cylinder (12) is fixedly installed on the upper end of each rotating column (10), and the lower end of the compacting cylinder (12) contacts the upper surface of the drill bit (5). An eccentric column (13) is fixedly installed in the center of the compacting cylinder (12) cavity. The outer wall of each compacting cylinder (12) is in contact with a scraping structure, and each scraping structure is rotatably connected to the upper end of the drill bit (5). Three excavating knives (19) are slidably connected to the outer wall of the lower end of the drill bit (5), and the excavating knives (19) are evenly spaced around the center of the drill bit (5). The upper end of the excavating knife (19) is fixedly connected to the lower end of the sliding frame (7).

2. The adjustable hole expansion device for oil production according to claim 1, characterized in that: A connecting column is fixedly installed at the lower end of the positioning shell (3), and a three-way electric push rod (15) is fixedly installed at the lower end of the connecting column. The outer wall of the three-way electric push rod (15) is slidably connected with three push rods (151), and each push rod (151) is adapted to the compacting cylinder (12) at the corresponding position. Each push rod (151) is slidably connected with a sliding block (17) on the side close to the corresponding compacting cylinder (12). A spring 2 (18) is fixedly installed between the push rod (151) and the sliding block (17). A motor 1 (14) is fixedly installed at the upper end of the sliding block (17). The output end of the motor 1 (14) passes through the sliding block (17) and is fixedly connected to the compacting cylinder (12) at the corresponding position.

3. The adjustable hole expansion device for oil production according to claim 1, characterized in that: The mud scraping structure comprises three rotating rods (22), each of the rotating rods (22) is rotatably connected to the upper surface of the drill bit (5), the lower end of each rotating rod (22) is sleeved with a torsion spring shaft (21), and the torsion spring shaft (21) is fixedly connected to the drill bit (5), the outer side wall of the rotating rod (22) is fixedly sleeved with an arc plate (23), and the arc plate (23) is fixedly installed with an arc frame (16) at one end away from the rotating rod (22), The inner cavity top of the circular arc frame (16) is rotatably connected to a spiral rod (25), and each spiral rod (25) is in contact with a compacting cylinder (12) at a corresponding position. A motor (24) is fixedly mounted on the upper end of the circular arc frame (16), and the output end of the motor (24) is fixedly connected to the spiral rod (25). A scraper (161) is provided on the side of the circular arc frame (16) close to the compacting cylinder (12), and the scraper (161) is in contact with the compacting cylinder (12).

4. The adjustable hole expansion device for oil production according to claim 1, characterized in that: The upper end of the drill bit (5) is provided with three sliding grooves (26) equidistantly along the center of the drill bit (5), and each sliding groove (26) is adapted to a corresponding screw rod (25), and the sliding groove (26) is movably connected to the outer side wall of the lower end of the screw rod (25). A stirring chamber (28) is provided inside the drill bit (5), and an oblique through hole (27) is provided between the stirring chamber (28) and each sliding groove (26).

5. The adjustable hole expansion device for oil production according to claim 4, characterized in that: A second motor (29) is fixedly installed inside the drill bit (5), and an output end of the second motor (29) extends to the cavity of the stirring chamber (28) and a stirring blade (30) is fixedly installed therein, and the stirring blade (30) can rotate in the cavity of the stirring chamber (28). Three arc grooves (38) are evenly spaced on the outer wall of the lower end of the drill bit (5), and each arc groove (38) is connected to the stirring chamber (28), and each arc groove (38) is slidably connected to an electric gate (39) on the side close to the stirring chamber (28).

6. The adjustable hole-expanding device for oil production according to claim 1, characterized in that: The outer wall of the lifting rod (1) is sleeved with a lifting platform (40), and support frames (41) are fixedly installed on both sides of the lifting platform (40). A cavity (361) is provided inside the positioning shell (3), and a through groove (35) connected to the cavity (361) is provided in the cavity of the lifting rod (1), and a water inlet pipe (31) connected to the through groove (35) is fixedly installed on the outer wall of the lifting platform (40).

7. The adjustable hole-expanding device for oil production according to claim 6, characterized in that: A guide wheel (34) is fixedly mounted at the lower end of the lifting platform (40), a hose reel (33) is placed on one side of the lifting platform (40), a hose (32) is sleeved on the outer wall of the hose reel (33), and an output end of the hose (32) bypasses the guide wheel (34) and is fixedly connected to the water inlet pipe (31).

8. The adjustable hole-expanding device for oil production according to claim 1, characterized in that: Each of the connecting rods (4) is provided with a flow groove 1 (36), and each flow groove 1 (36) is connected to the cavity (361). The drill bit (5) is provided with three flow grooves 2 (37) at equal intervals along the center of the drill bit (5), and the upper notch of each flow groove 2 (37) is connected to the flow groove 1 (36) at the corresponding position, and the lower notch of each flow groove 2 (37) is connected to the mixing chamber (28).

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