A reusable hole reamer for prospecting engineering

Abstract

The present invention relates to the technical field of drilling equipment, and specifically discloses a reusable reamer for prospecting engineering, comprising a mounting tube, a first blade wing being rotatably provided on the mounting tube, a torsion spring being installed between the first blade wing and the mounting tube, a second blade wing being rotatably provided on the first blade wing, a sliding frame being slidably provided in the mounting tube through a liquid guide shell, the sliding frame being fixedly connected to a fixed block rotatably connected to the second blade wing, a casing being installed on the mounting tube, a first sliding sleeve being slidably provided on the casing through a fixed ring, the first sliding sleeve being provided with a through hole communicating with the liquid guide shell, a first limit pin being slidably provided on the mounting tube, the first limit pin being engaged with the first sliding sleeve in a limiting manner. The present invention facilitates multiple limiting of the first sliding sleeve by extending and retracting the first limit pin, thereby controlling the reciprocating expansion of the first and second blade wings, and performing a multi-stage reaming operation.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, in particular to a reusable reamer while drilling for prospecting engineering. Background Art

[0002] The reamer is a downhole tool specially designed for expanding the diameter of the wellbore. It is generally installed on the drill string near the drill bit. When the reamer is working, its diameter is slightly larger than the diameter of the excavation drill bit. According to its working mode and design characteristics, the reamer can be divided into many types: rotary reamer, telescopic reamer, adaptive reamer and special reamer. However, during the working process of the existing traditional reamer, a ball is often dropped into the reamer to change the hydraulic flow channel inside the reamer to expand the blades of the reamer. However, since the mud flowing in the reamer requires different pressures at different depths, and the mud is affected by the flow resistance of the mud at the drill bit during normal supply, the pressure of the mud in the reamer will fluctuate accordingly. The changes and fluctuations of the mud affect the expansion state of the blades in the reamer, which can easily cause the wellbore diameter to be unqualified. At the same time, this working mode is not easy to remove the ball, and it is not easy to perform multi-stage reaming operations on the wellbore. Summary of the Invention

[0003] In order to overcome the above-mentioned problems, the present invention provides a reusable reamer for prospecting engineering.

[0004] The technical solution of the present invention is: a reusable drilling reamer for prospecting engineering, comprising a mounting tube, a lower connecting sleeve and an upper connecting sleeve are respectively installed at both ends of the mounting tube, a side wall of the mounting tube is provided with rectangular grooves equidistantly distributed in the circumferential direction, a first blade is rotatably arranged in the rectangular groove of the mounting tube, a torsion spring is installed between the first blade and the mounting tube, a second blade is rotatably arranged on the first blade, a liquid guide shell equidistantly distributed in the circumferential direction is fixedly connected in the mounting tube, a sliding frame is slidably arranged in the liquid guide shell, the sliding frame is fixed with a fixed block rotatably connected to the adjacent second blade, a sleeve is installed in the mounting tube, and the liquid guide The shell is communicated with the sleeve, the sleeve is fixed with a fixing ring, the fixing ring is slidably provided with a first sliding sleeve, a spring is installed between the first sliding sleeve and the fixing ring, the first sliding sleeve is provided with through holes distributed equidistantly in the circumference, the through holes on the first sliding sleeve are communicated and matched with the adjacent liquid-guiding shell, a limit ring is provided in the middle of the first sliding sleeve, a first sphere is provided in the first sliding sleeve, the mounting tube is slidably provided with first limit pins distributed equidistantly in the circumference, a spring is installed between the first limit pin and the mounting tube, the first limit pin penetrates the sleeve and slides, and the first limit pin is limited and matched with the first sliding sleeve.

[0005] Preferably, the first blade and the second blade are both provided with evenly distributed grooves, the diameter of the first sphere is smaller than the inner diameter of the first sliding sleeve, and the diameter of the first sphere is larger than the inner diameter of the upper limit ring of the first sliding sleeve, and the limit ring of the first sliding sleeve is provided with arc grooves equidistantly distributed circumferentially.

[0006] Preferably, the first sliding sleeve is provided with an annular groove, and an inclined surface is provided on a side of the annular groove close to the first limiting pin.

[0007] Preferably, the liquid guide housing is fixedly connected to and communicated with a conduit, the conduit is embedded in the mounting tube, and the communication port between the conduit and the adjacent liquid guide housing is located below the adjacent sliding frame, and the conduit is communicated with the adjacent rectangular groove on the mounting tube.

[0008] Preferably, the mounting tube is provided with guide grooves which are circumferentially equidistantly distributed, the guide grooves of the mounting tube are communicated with the adjacent rectangular grooves thereon, the fixed block is provided with a boss located in the adjacent guide grooves on the mounting tube, a sliding block is slidingly provided in the guide grooves of the mounting tube, a tension spring is installed between the sliding block and the mounting tube, and the sliding block is provided with evenly distributed limiting grooves on one side close to the adjacent fixed block, and the bosses of the fixed block are limitedly matched with the adjacent limiting grooves on the adjacent sliding block.

[0009] Preferably, a lifting mechanism for changing the flow cross-section in the first sliding sleeve is further included, the lifting mechanism being arranged on the first sliding sleeve, the lifting mechanism including a fixed sleeve, the fixed sleeve being fixedly connected to the inner wall of the first sliding sleeve, a first sliding ring and a second sliding ring being slidingly arranged between the fixed sleeve and the first sliding sleeve, the second sliding ring being provided with a fixed column, the fixed column of the second sliding ring being slidingly matched with the first sliding ring, and a spring being installed between the fixed column of the second sliding ring and the first sliding ring, the second sliding ring being fixedly connected with circumferentially equidistantly distributed folding rods, the folding rods penetrating the first sliding ring and the limiting ring of the first sliding sleeve and being slidably connected with both, the first sphere being in contact with and matching with the circumferentially equidistantly distributed folding rods.

[0010] Preferably, a limiting column equidistantly distributed circumferentially is slidingly provided at the annular groove on the first sliding sleeve, a tension spring is installed between the limiting column and the first sliding sleeve, the limiting column is hemispherical on the side close to the fixed sleeve, and the hemispherical end of the limiting column is limitedly matched with the second sliding ring.

[0011] Preferably, the first sliding sleeve is fixedly connected with air guide tubes equidistantly distributed in the circumferential direction, the fixed ring, the first sliding sleeve and the sleeve cooperate to form a first cavity, the first sliding sleeve, the fixed sleeve and the first sliding ring cooperate to form a second cavity, and the air guide tubes are used to connect the first cavity with the second cavity.

[0012] Preferably, it also includes a forced reset mechanism for resetting all the second blades, the forced reset mechanism is arranged on the first sliding sleeve, the first sliding sleeve is provided with two symmetrically distributed blind holes, the forced reset mechanism includes two symmetrically distributed second limit pins, the two second limit pins are respectively installed in the two blind holes on the first sliding sleeve, two symmetrical arc plates are installed in the first sliding sleeve, the two arc plates cooperate to form a circular ring, the arc plates are provided with blind holes that cooperate with adjacent second limit pins, a second sliding sleeve is installed between the two arc plates in a limiting manner, the second sliding sleeve is slidably engaged with the mounting tube, the second sliding sleeve is provided with a limiting ring, a second freely movable second sphere is provided in the second sliding sleeve, the diameter of the second sphere is smaller than the inner diameter of the second sliding sleeve, and the diameter of the second sphere is larger than the inner diameter of the limiting ring of the second sliding sleeve, the sliding frame is fixed with a cylindrical rod, the cylindrical rod penetrates the mounting tube and is slidably connected to it, and the cylindrical rod is squeezed and engaged with the corresponding arc plate.

[0013] Preferably, the inner diameter of the upper limit ring of the second sliding sleeve is larger than the inner diameter of the upper limit ring of the first sliding sleeve.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention facilitates multiple limiting of the first sliding sleeve through the extension and contraction of the first limit pin, thereby controlling the reciprocating expansion of the first blade wing and the second blade wing to perform multi-stage hole expansion operations, utilizes the sliding block to limit the fixed block and the first sphere to be impacted by the mud liquid, so as to perform doubly limiting the expanded first blade wing and the second blade wing, thereby avoiding the influence of the pressure fluctuation of the transported mud liquid on the hole expansion stability of the device, utilizes the folding rod to lift the first sphere, maintains the size of the flow cross-section in the mounting pipe, thereby maintains the flow rate of the mud liquid in the first sliding sleeve, utilizes the change of the gas pressure in the first cavity and the second cavity, makes the first sphere close to the limiting ring of the first sliding sleeve, controls the impact force of the mud liquid flow to act stably on the first sliding sleeve, utilizes the cooperation of the second sphere and the limiting ring of the second sliding sleeve, controls the first blade wing and the second blade wing to be forced to reset, and facilitates the smooth removal of the device from the well without damaging the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2It is a cross-sectional view of the components of the mounting pipe and the lower connecting sleeve of the present invention;

[0017] Figure 3 A cross-sectional view of components at the installation tube and sleeve of the present invention;

[0018] Figure 4 It is a cross-sectional view of the components of the liquid guide housing and sleeve of the present invention;

[0019] Figure 5 It is a cross-sectional view of the components of the liquid guide housing and the first sliding sleeve of the present invention;

[0020] Figure 6 This is a schematic structural diagram of the components of the sleeve and the sliding block of the present invention;

[0021] Figure 7 is a cross-sectional view of the lifting mechanism of the present invention;

[0022] Figure 8 An exploded view of the forced reset mechanism of the present invention;

[0023] Figure 9 This is an exploded view of the first sliding sleeve, the second sliding sleeve and other components of the present invention.

[0024] Markings in the figure are: 1. Mounting tube, 2. Lower connecting sleeve, 3. Upper connecting sleeve, 4. First blade, 5. Second blade, 6. Liquid guide shell, 7. Sliding frame, 8. Fixed block, 9. Sleeve, 10. Fixed ring, 11. First sliding sleeve, 1101. Arc groove, 1102. Annular groove, 12. First sphere, 13. First limiting pin, 14. Conduit, 15. Sliding block, 16. Fixed sleeve, 17. First sliding ring, 18. Second sliding ring, 19. Folding rod, 20. Limiting column, 21. Air guide tube, 22. Second limiting pin, 23. Arc plate, 24. Second sliding sleeve, 25. Second sphere, 26. Cylindrical rod. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0026] During the operation of the existing reamer, as the ball is placed in the reamer, the blades of the reamer expand under the pressure of the mud liquid to expand the wellbore. However, since the ball in the reamer is not easy to remove, it is difficult for the reamer to perform multi-stage reaming operations on the wellbore.

[0027] In response to this discovery, the present invention designs an eye reamer capable of repeatedly limiting the position of the blade.

[0028] Example 1: A reusable reamer for prospecting engineering, such as Figure 1-Figure 5 As shown, it includes a mounting tube 1, and the upper and lower ends of the mounting tube 1 are respectively detachably mounted with an upper connecting sleeve 3 and a lower connecting sleeve 2. The outer wall of the mounting tube 1 is provided with three rectangular grooves equidistantly distributed in the circumferential direction. The upper part of the three rectangular grooves on the mounting tube 1 is rotatably provided with a first blade wing 4. Two symmetrical torsion springs are installed between the first blade wing 4 and the mounting tube 1. The lower part of the first blade wing 4 is rotatably provided with a second blade wing 5. The second blade wing 5 is located in the adjacent rectangular grooves on the mounting tube 1. The first blade wing 4 and the second blade wing 5 are both provided with evenly distributed grooves. The grooves on the first blade wing 4 and the second blade wing 5 are used to divide and excavate soil. Three liquid-guiding shells 6 equidistantly distributed in the circumferential direction are fixedly connected in the tube 1. The three liquid-guiding shells 6 are respectively located below the three first blades 4. A sliding frame 7 is slidingly provided in the liquid-guiding shell 6. The sliding frame 7 penetrates the mounting tube 1 and is slidably connected thereto. A fixed block 8 is fixedly provided on the upper end of the sliding frame 7. The fixed block 8 is rotatably connected to the lower part of the adjacent second blade 5. The fixed block 8 slides in the corresponding rectangular groove on the mounting tube 1. A sleeve 9 is installed in the mounting tube 1 and is in contact with the lower sleeve 2. The sleeve 9 is connected to the three liquid-guiding shells 6. A fixing ring 10 is fixedly provided on the inner wall of the sleeve 9. The fixing ring 10 is limited in sliding and is provided with a first sleeve 9 that slides with the sleeve 9. A sliding sleeve 11, a spring is installed between the first sliding sleeve 11 and the fixed ring 10, the first sliding sleeve 11 is provided with three through holes equidistantly distributed in the circumferential direction, the through holes on the first sliding sleeve 11 are communicated with the adjacent liquid guide shell 6, a limiting ring is provided in the middle of the first sliding sleeve 11, and the limiting ring of the first sliding sleeve 11 is provided with six arc grooves 1101 equidistantly distributed in the circumferential direction, a first sphere 12 that moves freely is provided at the limiting ring of the first sliding sleeve 11, the diameter of the first sphere 12 is smaller than the inner diameter of the first sliding sleeve 11, and the diameter of the first sphere 12 is larger than the inner diameter of the limiting ring of the first sliding sleeve 11, the arc groove 1101 is used for the first sphere 12 to fit the limiting ring of the first sliding sleeve 11, and the middle part of the first sliding sleeve 11 still maintains a part of the flow cross section. The lower part of the mounting tube 1 is slidingly provided with three first limiting pins 13 equidistantly distributed in the circumferential direction. A spring is installed between the first limiting pins 13 and the mounting tube 1. The three first limiting pins 13 all penetrate the sleeve 9 and are slidably connected thereto. The three first limiting pins 13 are used to limit the first sliding sleeve 11. The elastic force of the spring connected to the first limiting pin 13 is utilized to facilitate the first limiting pin 13 to limit the first sliding sleeve 11 multiple times, so as to facilitate the segmented hole reaming operation of the device.

[0029] like Figure 6 and Figure 7As shown, the first sliding sleeve 11 is provided with an annular groove 1102, and an inclined surface is provided on one side of the annular groove 1102 close to the first limit pin 13. The inclined surface on the annular groove 1102 controls the length of the first limit pin 13 inserted therein. After the first limit pin 13 inserted into the annular groove 1102 is cut off, the part of the first limit pin 13 retained in the annular groove 1102 does not affect the normal movement of the first sliding sleeve 11, so that after the first sliding sleeve 11 is reset, the first limit pin 13 limits the first sliding sleeve 11 again. The side wall of the liquid guide shell 6 is fixedly connected and connected with a conduit 14. A one-way valve is provided in the conduit 14 for the liquid therein to flow into the adjacent rectangular groove in the mounting tube 1. The conduit 14 is embedded in the mounting tube 1, and the communication port between the conduit 14 and the adjacent liquid guide shell 6 is located below the adjacent sliding frame 7. The conduit 14 is connected to the adjacent rectangular groove on the mounting tube 1. The conduit 14 is used to guide the mud liquid to spray toward the corresponding second blade wing 5, helping the second blade wing 5 to dig the soil. A guide groove distributed equidistantly in the circumference is provided in the mounting tube 1, and the guide groove of the mounting tube 1 is connected to the adjacent rectangular groove thereon. The fixed block 8 is provided with a boss, and the boss of the fixed block 8 is located in the adjacent guide groove on the mounting tube 1. A sliding block 15 is slidingly provided in the guide groove of the mounting tube 1, and a tension spring is installed between the sliding block 15 and the mounting tube 1. Four evenly distributed limit grooves are provided on the side of the sliding block 15 close to the adjacent fixed block 8. The boss of the fixed block 8 is limitedly matched with the adjacent limit grooves on the adjacent sliding block 15. The sliding block 15 is limitedly matched with the boss on the adjacent fixed block 8 to control the stability of the hole expansion of the second blade wing 5. The boss on the fixed block 8 is located in the limit grooves at different positions on the adjacent sliding block 15 to control the hole expansion diameter of the second blade wing 5.

[0030] When using this device for drilling operations, the operator connects the upper sleeve 3 in the assembled device to the drill pipe, and then connects the drill bit end to the lower sleeve 2 to complete the composition of the drilling device, wherein the first sphere 12 is not installed in the first sliding sleeve 11, and the first limit pin 13 is located in the annular groove 1102, limiting the movement of the first sliding sleeve 11.

[0031] After the device is assembled, the operator starts the external drilling equipment, so that the drill pipe drives the device and the drill bit to drill into the soil. At the same time, the external drilling equipment works to continuously inject mud into the through hole of the drill pipe, so that the drill bit gradually drills. When the installation pipe 1 is drilled to the specified depth and needs to be expanded, the operator places the first sphere 12 in the through hole of the drill pipe, where the first sphere 12 moves to contact the limit ring of the first sliding sleeve 11. Then the operator controls the external drilling equipment to adjust the pressure of the injected mud. At this time, the mud squeezes the first sphere 12 tightly against the limit ring of the first sliding sleeve 11. At the same time, the extrusion force of the mud impacting the first sphere 12 is greater than the limit force of the first limit pin 13 on the first sliding sleeve 11. At this time, the first sliding sleeve 11 cuts off the part of the first limit pin 13 extending out of the casing 9.

[0032] After the portion of the first limit pin 13 extending into the sleeve 9 is cut off, the mud flow continues to impact the first sphere 12, and the first sphere 12 drives the first sliding sleeve 11 to move downward. The first sliding sleeve 11 moves downward to compress the connected spring. The first sliding sleeve 11 moves so that the three through holes are gradually connected to the liquid guide shell 6. Then, part of the mud enters the adjacent liquid guide shell 6 through the through hole on the first sliding sleeve 11. The mud squeezes the sliding frame 7 to move. At the same time, part of the mud gradually flows out through the guide tube 14, and part of the mud flows out through the arc groove 11. 01 flows downward to the vicinity of the drill bit, and the sliding frame 7 moves through the adjacent fixed block 8 to squeeze the adjacent second blade wing 5 to move upward, so that the second blade wing 5 and the adjacent first blade wing 4 rotate. At this time, the second blade wing 5 and the adjacent first blade wing 4 are in a bent state, and the first blade wing 4 rotates and twists the connected torsion spring, and the rotation of the second blade wing 5 and the adjacent first blade wing 4 causes the hinge between the two to gradually extend from the outer side of the mounting tube 1. The subsequent operator starts the external drilling equipment, so that the drill rod drives the mounting tube 1 and the drill bit to move and rotate.

[0033] The rotation of the mounting tube 1 drives the connected parts to rotate together, wherein the three sliding blocks 15 move to stretch the connected tension spring under the centrifugal rotation, wherein the sliding block 15 moves so that its upper limit groove wraps the protrusion of the adjacent fixed block 8, and the subsequent external drilling equipment controls the drill pipe to drive the connected parts to move to perform drilling operations. At this time, the mounting tube 1 drives the three groups of first blades 4 and second blades 5 to rotate together, and the first blades 4 and second blades 5 rotate to perform hole expansion operations on the wellbore.

[0034] After completing the reaming operation, the operator controls the rotation speed of the installation pipe 1. At this time, the rotational centrifugal force on the three sliding blocks 15 becomes smaller. Under the tension of the tension spring connected to the sliding block 15, the sliding block 15 moves so that its upper limit groove is disengaged from the limiting cooperation with the protrusion of the adjacent fixed block 8. Then the operator adjusts the pressure of the mud liquid in the installation pipe 1 again. Subsequently, under the torsion action of the torsion spring connected to the first blade wing 4, the first blade wing 4 and the adjacent second blade wing 5 move in opposite directions and reset. After the first sliding sleeve 11 is reset, under the elastic force of the spring connected to the first limit pin 13, the remaining part of the first limit pin 13 is extended from the casing 9 again to limit the first sliding sleeve 11. The above operation is subsequently repeated to perform drilling operation. When the reaming operation is needed again, the operator can repeat the above operation.

[0035] When performing the hole expansion operation, the operator adjusts the pressure of the mud liquid entering the liquid guide shell 6 according to the pressure of the injected mud liquid, thereby controlling the distance that the mud liquid squeezes the sliding frame 7 to move, that is, controlling the extension distance of the hinged parts of the first blade 4 and the second blade 5 relative to the outer wall of the mounting tube 1, and completing the adjustment of the hole expansion size. Subsequently, the mounting tube 1 is rotated to make the three sliding blocks 15 repeat the above operation, and the bosses of the fixed block 8 are controlled to be located in the limit grooves of different heights on the adjacent sliding blocks 15 to achieve hole expansion processing of different diameters. After completing the drilling and hole expansion operations, the operator takes out the device and the drill bit through the external drilling equipment.

[0036] Research has found that the mud flowing in the existing reamer requires different pressures at different depths. At the same time, during the normal supply process, the mud is affected by the change in the outflow resistance of the mud at the drill bit, and the pressure of the mud in the reamer will fluctuate accordingly. The changes and fluctuations in the mud affect the expansion state of the blades in the reamer.

[0037] Example 2: Based on Example 1, Figure 4 and Figure 7As shown, it also includes a lifting mechanism for changing the flow cross-section in the first sliding sleeve 11, the lifting mechanism is arranged on the first sliding sleeve 11, the lifting mechanism includes a fixed sleeve 16, the fixed sleeve 16 is fixed to the inner wall of the first sliding sleeve 11, and the fixed sleeve 16 is located below the upper limit ring of the first sliding sleeve 11, a first sliding ring 17 and a second sliding ring 18 are slidingly arranged between the fixed sleeve 16 and the first sliding sleeve 11, the second sliding ring 18 is located below the first sliding ring 17, and a fixing column is provided on the upper surface of the second sliding ring 18, and the fixing column of the second sliding ring 18 penetrates the first sliding ring 17 and is connected to it. Sliding fit, and a spring is installed between the fixed column of the second sliding ring 18 and the first sliding ring 17. Six folding rods 19 equidistantly distributed circumferentially are fixed to the upper surface of the second sliding ring 18. The six folding rods 19 are staggered with six arc grooves 1101. The folding rods 19 successively penetrate the limiting rings of the first sliding ring 17 and the first sliding sleeve 11 and are slidably connected to both. The first sphere 12 is in contact with and fits with the folding rods 19 equidistantly distributed circumferentially. The folding rods 19 lift the first sphere 12 to control the flow cross section in the first sliding sleeve 11, thereby controlling the flow rate of the mud liquid in the first sliding sleeve 11.

[0038] like Figure 7 As shown, three circumferentially equidistantly distributed limiting posts 20 are slidably provided at the annular groove 1102 on the first sliding sleeve 11. The limiting posts 20 are directly opposite to the corresponding folding rods 19. A tension spring is installed between the limiting posts 20 and the first sliding sleeve 11. The facing ends of the three limiting posts 20 are all set to be hemispherical. The hemispherical ends of the limiting posts 20 are limitedly matched with the second sliding ring 18. Three circumferentially equidistantly distributed air pipes 21 are fixedly connected to the first sliding sleeve 11. The three air pipes 21 are staggered with the three limiting posts 20. The fixing ring 10 and the first sliding sleeve are fixed to the inner surface of the first sliding sleeve 11. The movable sleeve 11 and the sleeve 9 cooperate to form a first cavity, the first sliding sleeve 11, the fixed sleeve 16 and the first sliding ring 17 cooperate to form a second cavity, and the air guide tube 21 is used to connect the first cavity and the second cavity. After the first sliding sleeve 11 moves, the change in gas pressure in the first cavity and the second cavity is utilized to facilitate the first sphere 12 to always be close to the limit ring of the first sliding sleeve 11 in the hole expansion working state. At the same time, in the initial state, the pressure in the first cavity and the second cavity is reduced to ensure that the six folding rods 19 lift the first sphere 12.

[0039] When the first ball 12 is pressed against the second sliding ring 18, the first ball 12 is pressed against the first sliding ring 18, and the first ball 12 is pressed against the second sliding ring 18.

[0040] After the folding rod 19 moves down to the limit ring of the first sphere 12 that fits the first sliding sleeve 11, the above operation is repeated to perform the hole expansion operation, wherein the first sliding sleeve 11 moves to compress the gas in the first cavity, and the compressed high-pressure gas enters the second cavity through the air guide tube 21. The high-pressure gas squeezes the first sliding ring 17 in the second cavity, restricting the first sliding ring 17, the second sliding ring 18 and the six folding rods 19 from resetting, ensuring that the first sphere 12 is always in close contact with the limit ring of the first sliding sleeve 11, and keeping the impact force of the mud liquid flowing through the first sphere 12 on the first sliding sleeve 11 stable.

[0041] After completing the hole expansion operation, the operator repeats the above operation to move the first sliding sleeve 11 in the opposite direction and reset it, wherein the multiple first limit pins 13 restore the limit on the first sliding sleeve 11. During the reset process of the first sliding sleeve 11, the volume of the first cavity increases and the gas in the second cavity is pumped into it through the air duct 21. The gas in the second cavity is pumped out and the pressure decreases. After the pressure decreases, the first sliding ring 17, the second sliding ring 18 and the six folding rods 19 move in the opposite direction and reset. At this time, under the tension of the tension spring connected to the limit column 20, the limit column 20 resets the second sliding ring 18 again, and the six folding rods 19 move to lift the first sphere 12, thereby expanding the flow cross section in the first sliding sleeve 11, ensuring the flow of mud during drilling, and maintaining the stability of drilling efficiency.

[0042] Research has found that when the existing reamer is working continuously, stones in the wellbore are likely to get stuck in the blades, causing the blades of the reamer to be unable to be automatically retracted. If the reamer is subsequently pulled out, the blades on the reamer are likely to damage the wellbore.

[0043] Example 3: Based on Example 2, Figure 2 、 Figure 8 and Figure 9As shown, it also includes a forced reset mechanism for resetting all the second blades 5, the forced reset mechanism is arranged on the first sliding sleeve 11, and the first sliding sleeve 11 is provided with two blind holes symmetrically distributed front and back, the forced reset mechanism includes two second limit pins 22 symmetrically distributed front and back, the two second limit pins 22 are respectively installed in the two blind holes on the first sliding sleeve 11, the second limit pin 22 is located above the sleeve 9, and two symmetrical arc plates 23 are installed in the first sliding sleeve 11. The two arc plates 23 cooperate to form a circular ring, and the opposite sides of the two arc plates 23 are provided with blind holes. The blind holes of the arc plates 23 are limited and matched with the adjacent second limit pins 22. A second sliding sleeve 24 is limitedly installed between the two arc plates 23, and the second sliding sleeve 24 slides with the mounting tube 1. A limiting ring is provided in the middle of the sleeve 24, and a freely movable second sphere 25 is provided at the limiting ring of the second sliding sleeve 24. The diameter of the second sphere 25 is smaller than the inner diameter of the second sliding sleeve 24, and the diameter of the second sphere 25 is larger than the inner diameter of the upper limiting ring of the second sliding sleeve 24, and the inner diameter of the upper limiting ring of the second sliding sleeve 24 is larger than the inner diameter of the upper limiting ring of the first sliding sleeve 11. A cylindrical rod 26 is fixed to the upper surface of the sliding frame 7, and the cylindrical rod 26 penetrates the mounting tube 1 and is slidably connected thereto, and the cylindrical rod 26 is squeezed and fitted with the corresponding arc plate 23. After the second sphere 25 is matched with the upper limiting ring of the second sliding sleeve 24, the pressure of the mud liquid is changed to cut off the two second limiting pins 22, and the two second blades 5 are controlled to be forced to reset, so that the operator can smoothly remove the device without damaging the wellbore.

[0044] When the operator detects that the first blade 4 and the second blade 5 cannot be reset through the external drilling equipment, the operator places the second ball 25 into the through hole of the drill pipe. The second ball 25 moves to fit the limit ring of the second sliding sleeve 24. Subsequently, under the action of the flow of mud, the impact force of the mud acts on the second ball 25 and the second sliding sleeve 24. The subsequent operator increases the pressure of the mud through the external drilling equipment. At this time, the impact force of the mud on the second ball 25 and the second sliding sleeve 24 is greater than the strength of the second limit pin 22, and the second limit pin 22 is cut off. Then the second ball 25 and the second sliding sleeve 24 drive the two arc plates 23 to move downward and squeeze the cylindrical rod 26. The cylindrical rod 26 is squeezed and moved downward, driving the adjacent sliding frame 7 to move in the opposite direction and reset. The sliding frame 7 moves through the adjacent fixed block 8 to pull the adjacent second blade 5 to move in the opposite direction and reset, completing the chamber reset of the first blade 4 and the second blade 5, making it convenient for the operator to take out the device through the external drilling equipment.

[0045] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope provided by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A reusable drilling reamer for prospecting engineering, comprising a mounting tube (1), wherein both ends of the mounting tube (1) are respectively provided with a lower connecting sleeve (2) and an upper connecting sleeve (3), a side wall of the mounting tube (1) is provided with rectangular grooves equidistantly distributed in the circumferential direction, a first blade (4) is rotatably provided in the rectangular groove of the mounting tube (1), a torsion spring is provided between the first blade (4) and the mounting tube (1), a second blade (5) is rotatably provided in the first blade (4), a liquid guide shell (6) equidistantly distributed in the circumferential direction is fixedly connected in the mounting tube (1), a sliding frame (7) is slidably provided in the liquid guide shell (6), and the sliding frame (7) is fixedly connected to the adjacent second blade (5) A rotatably connected fixed block (8), a sleeve (9) is installed in the mounting tube (1), the liquid guide shell (6) is communicated with the sleeve (9), the sleeve (9) is fixed with a fixing ring (10), the fixing ring (10) is slidably provided with a first sliding sleeve (11), a spring is installed between the first sliding sleeve (11) and the fixing ring (10), the first sliding sleeve (11) is provided with through holes distributed equidistantly in the circumferential direction, the through holes on the first sliding sleeve (11) are communicated with the adjacent liquid guide shell (6), a limiting ring is provided in the middle of the first sliding sleeve (11), and a first sphere (12) is provided in the first sliding sleeve (11), characterized in that: The invention also includes first limiting pins (13) distributed equidistantly in the circumferential direction. The first limiting pins (13) distributed equidistantly in the circumferential direction are all slidably arranged on the mounting tube (1). A spring is installed between the first limiting pins (13) and the mounting tube (1). The first limiting pins (13) penetrate the sleeve (9) and slide. The first limiting pins (13) and the first sliding sleeve (11) are limitedly matched.

2. A reusable reamer for prospecting engineering according to claim 1, characterized in that: The first blade (4) and the second blade (5) are both provided with evenly distributed grooves, the diameter of the first sphere (12) is smaller than the inner diameter of the first sliding sleeve (11), and the diameter of the first sphere (12) is larger than the inner diameter of the upper limit ring of the first sliding sleeve (11), and the limit ring of the first sliding sleeve (11) is provided with arc grooves (1101) distributed equidistantly in the circumferential direction.

3. A reusable reamer for prospecting engineering according to claim 2, characterized in that: The first sliding sleeve (11) is provided with an annular groove (1102), and an inclined surface is provided on a side of the annular groove (1102) close to the first limiting pin (13).

4. A reusable reamer for prospecting engineering according to claim 3, characterized in that: The liquid guide housing (6) is fixedly connected to and communicated with a conduit (14), the conduit (14) is embedded in the mounting tube (1), and the communication port between the conduit (14) and the adjacent liquid guide housing (6) is located below the adjacent sliding frame (7), and the conduit (14) is communicated with the adjacent rectangular groove on the mounting tube (1).

5. The reusable reamer for prospecting engineering according to claim 4, characterized in that: The mounting tube (1) is provided with guide grooves equidistantly distributed in the circumferential direction, the guide grooves of the mounting tube (1) are communicated with the adjacent rectangular grooves thereon, the fixed block (8) is provided with a convex column located in the adjacent guide grooves on the mounting tube (1), a sliding block (15) is slidably provided in the guide grooves of the mounting tube (1), a tension spring is installed between the sliding block (15) and the mounting tube (1), and the sliding block (15) is provided with evenly distributed limiting grooves on a side adjacent to the fixing block (8), and the convex column of the fixing block (8) is limitedly matched with the adjacent limiting grooves on the adjacent sliding block (15).

6. A reusable reamer for prospecting engineering according to claim 5, characterized in that: The invention also includes a lifting mechanism for changing the flow cross section in the first sliding sleeve (11), the lifting mechanism is arranged on the first sliding sleeve (11), the lifting mechanism includes a fixed sleeve (16), the fixed sleeve (16) is fixed to the inner wall of the first sliding sleeve (11), a first sliding ring (17) and a second sliding ring (18) are slidingly arranged between the fixed sleeve (16) and the first sliding sleeve (11), the second sliding ring (18) is provided with a fixed column, the fixed column of the second sliding ring (18) is slidingly matched with the first sliding ring (17), and a spring is installed between the fixed column of the second sliding ring (18) and the first sliding ring (17), the second sliding ring (18) is fixed with folding rods (19) distributed equidistantly in the circumferential direction, the folding rods (19) penetrate the first sliding ring (17) and the limiting ring of the first sliding sleeve (11) and are slidably connected to both, and the first sphere (12) is in contact with the folding rods (19) distributed equidistantly in the circumferential direction.

7. A reusable reamer for prospecting engineering according to claim 6, characterized in that: A limiting column (20) is slidingly provided at the annular groove (1102) on the first sliding sleeve (11) and is equidistantly distributed in the circumferential direction. A tension spring is installed between the limiting column (20) and the first sliding sleeve (11). The side of the limiting column (20) close to the fixed sleeve (16) is hemispherical, and the hemispherical end of the limiting column (20) is limitedly matched with the second sliding ring (18).

8. The reusable reamer for prospecting engineering according to claim 7, characterized in that: The first sliding sleeve (11) is fixedly connected with air guide tubes (21) distributed equidistantly in the circumferential direction; the fixing ring (10), the first sliding sleeve (11) and the sleeve (9) cooperate to form a first cavity; the first sliding sleeve (11), the fixing sleeve (16) and the first sliding ring (17) cooperate to form a second cavity; the air guide tubes (21) are used to connect the first cavity with the second cavity.

9. The reusable reamer for prospecting engineering according to claim 1, characterized in that: The invention also includes a forced reset mechanism for resetting all the second blades (5), the forced reset mechanism is arranged on the first sliding sleeve (11), the first sliding sleeve (11) is provided with two symmetrically distributed blind holes, the forced reset mechanism includes two symmetrically distributed second limit pins (22), the two second limit pins (22) are respectively installed in the two blind holes on the first sliding sleeve (11), the first sliding sleeve (11) is provided with two symmetrical arc plates (23), the two arc plates (23) cooperate to form a ring, the arc plates (23) are provided with blind holes that cooperate with the adjacent second limit pins (22), and the two arc plates (23) are provided with a plurality of symmetrical arc plates (23). 3) is provided with a second sliding sleeve (24) in a limiting manner, the second sliding sleeve (24) is slidingly matched with the mounting tube (1), the second sliding sleeve (24) is provided with a limiting ring, a freely movable second sphere (25) is provided in the second sliding sleeve (24), the diameter of the second sphere (25) is smaller than the inner diameter of the second sliding sleeve (24), and the diameter of the second sphere (25) is larger than the inner diameter of the limiting ring of the second sliding sleeve (24), the sliding frame (7) is fixed with a cylindrical rod (26), the cylindrical rod (26) penetrates the mounting tube (1) and is slidably connected thereto, and the cylindrical rod (26) is squeezed and matched with the corresponding arc plate (23).

10. The reusable reamer for prospecting engineering according to claim 9, characterized in that: The inner diameter of the upper limit ring of the second sliding sleeve (24) is greater than the inner diameter of the upper limit ring of the first sliding sleeve (11).

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