A pressure reducing device for mud pumps in engineering survey drilling rigs

Abstract

This invention discloses a mud pump pressure reduction device for engineering exploration drilling rigs, including a drilling mechanism. The bottom of the drilling mechanism is provided with several drill rods connected by a connecting mechanism. The bottom of each drill rod is provided with a drill bit fixedly connected thereto. The outer periphery of the drill bit is provided with a first annular tube detachably connected thereto. The surface of the drill bit is provided with several first channels extending to the top of the drill rod. The top of each first channel is provided with a mud pump connected thereto. The device also includes a fixing mechanism for fixing the device to the ground. This device ensures that the pressure inside the borehole always adapts to and balances the side pressure on the borehole wall generated by the continuous increase in drilling depth, maintaining the integrity of the borehole wall and preventing collapse. It can also completely fit against uneven borehole walls, seamlessly connecting the fixing work of the borehole during drilling, while preventing the pump cover from breaking and flying out and injuring people due to excessive pump pressure.

Description

Technical Field

[0001] This invention relates to drilling equipment, and more particularly to a mud pump pressure reduction device for engineering exploration drilling rigs. Background Technology

[0002] During the drilling process, existing engineering exploration drilling rigs require the drilled holes to be fixed. For ultra-deep holes, the excessive depth results in a long transport distance. If a pipe-fixed hole method is used, the friction between the pipe wall and the hole wall increases significantly with the drilling depth. After reaching a certain depth, the friction makes it difficult for the pipe to continue transporting downwards, causing construction limitations.

[0003] Existing drilling equipment cannot achieve real-time hole solidification during continuous drilling operations. It needs to solidify the hole segment by segment during the short drilling process. Due to the large uncertainty of drilling depth, the deeper underground, the greater the pressure generated by collapse. The hole solidification equipment cannot handle the situation where the pressure increases exponentially, resulting in a significant reduction in hole solidification efficiency and an astonishing cost. Moreover, it cannot achieve a sealed fixation, leading to serious water seepage, which severely affects the use of subsequent holes. At the same time, during the drilling process, blockage of the mud pump can easily occur, causing the pump pressure to rise, which may lead to the pump cover breaking off and flying out, causing injury. Summary of the Invention

[0004] To address the aforementioned problems, the technical problem to be solved by this invention is to ensure that the pressure inside the borehole is always adapted to and balanced with the side pressure of the borehole wall generated by the continuous increase of the drilling depth, maintain the integrity of the borehole wall and prevent it from collapsing, and can completely fit the uneven borehole wall. It can seamlessly connect the fixing work of the hole during the drilling process, and at the same time avoid the pump cover from breaking and flying out and injuring people due to excessive pump pressure.

[0005] This invention provides a mud pump pressure relief device for an engineering survey drilling rig, comprising a drilling mechanism. The bottom of the drilling mechanism has several drill rods connected by a connecting mechanism. The bottom of each drill rod has a drill bit fixedly connected to it. The outer periphery of the drill bit has a first annular tube detachably connected to it. The surface of the drill bit has several first channels extending to the top of the drill rod. A mud pump is connected to the top of each first channel. The device also includes a fixing mechanism for fixing the device to the ground. The bottom of the fixing mechanism has a corrugated pipe fixedly connected to it. The bottom of the corrugated pipe has a sliding assembly fixedly connected to it. The top of the sliding assembly has a second annular tube. The top of the first annular tube has several nozzles. The drill rod and the drill bit have interconnected second channels, which are connected to the nozzles and used to introduce cement. The drill rod passes through the sliding assembly and rotates relative to it. The interior of the corrugated pipe is connected to an external water source. The mud pump is electrically connected to an external power source.

[0006] Furthermore, the drilling mechanism includes a drive motor, the output end of which is fixedly connected to a fixing member, the top of the drill rod is provided with a slot, the fixing member is inserted into the slot, and the drive motor is electrically connected to an external power source.

[0007] Furthermore, the connecting mechanism includes a threaded ring, and each drill rod has an annular threaded groove at its top. The inner circumference of the threaded groove is a fixed post, which is fixedly connected to the drill rod. Adjacent drill rods are threadedly connected through the threaded ring and the threaded groove, and the slot is located at the top of the fixed post.

[0008] Furthermore, the fixing mechanism includes an annular pressure plate, the top of the corrugated pipe is fixedly connected to the pressure plate, the pressure plate is provided with a plurality of fixing holes, the pressure plate abuts against the ground, and also includes a plurality of piles, the piles being inserted into the ground through the fixing holes.

[0009] Furthermore, the fixing member is provided with a fixing plate fixedly connected thereto, and the fixing plate is provided with a plurality of sleeves fixedly connected thereto. The sleeves are used to accommodate the mud pump, and the mud pump is provided with a connecting pipe, which is inserted into the first channel.

[0010] Furthermore, the sliding assembly includes a counterweight, the top of which is fixedly connected to the bottom of the bellows. The bottom of the counterweight is provided with a first annular groove, and the top of the drill bit is provided with a second annular groove. A plurality of balls are provided in the second annular groove, and the tops of the balls are located in the first annular groove.

[0011] Furthermore, the top of the first annular tube is lower than the top of the second annular tube.

[0012] Furthermore, the connecting pipe is provided with a branch pipe, the branch pipe is provided with a check valve, and the branch pipe is connected to an external high-pressure water source.

[0013] Furthermore, the drill bit has a groove on its side wall, and the inner wall of the first annular tube has a recessed part with a fan-shaped cross-section. A spring is provided in the groove, one end of the spring is fixedly connected to the drill bit, and the other end of the spring is provided with a locking block. The side of the locking block is provided with a fixing part with a fan-shaped cross-section that is fixedly connected to it.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention discloses a mud pump pressure-reducing device for engineering exploration drilling rigs. Through the cooperation of the drilling mechanism, multiple drill rods, and drill bits, the drilling depth of this device can be extended to the actual required depth. Since the fixing mechanism is fixed to the ground and completely blocks the area between the corrugated pipe and the borehole wall, it avoids cement surging after subsequent cement injection. When the drill rod moves downward under the drive of the drilling mechanism, the stacked corrugated pipe is gradually pulled out from the inside of the second annular pipe. Moreover, the length of the fully unfolded corrugated pipe in the stacked state is much greater than the length of a single drill rod, making it suitable for most drilling operations, resulting in strong drilling continuity. Furthermore, by connecting an external water source to the corrugated pipe… Water is gradually injected into the corrugated pipe, allowing it to expand normally. Meanwhile, the mud pump can extract debris, seeping water, and soil generated during drilling through the first channel within the drill rod, ensuring stable and reliable drilling. If any mud pump becomes clogged, causing increased pressure, it is stopped, and the corresponding first channel is cleared. This prevents the pump cover from shattering and injuring people due to excessive pressure, and ensures continuous drilling without interruption of operation. Simultaneously, the second channel within the drill rod can spray cement through the second annular pipe, covering the borehole wall. Under the water pressure within the corrugated pipe, the first annular... Under the limiting effect of the pipe and the second annular pipe, and the tight fit of the corrugated pipe, and the rotation of the drill rod driving the water source in the corrugated pipe to rotate and generate centrifugal force, the uncured cement layer covering the hole wall has good density, and the air bubbles in the uncured cement layer are fully squeezed out. Moreover, since the water pressure in the corrugated pipe is sufficient to compensate for the external pressure of the hole wall, the uncured cement layer will hardly be washed away by water seepage and fail to effectively solidify as a whole. Under long-term fixation, the solidified cement wall has strong integrity, thus making the solidified cement wall have strong compressive strength. Furthermore, with the cooperation of the uncured cement layer, the corrugated pipe, and the water source in the corrugated pipe, the unevenness of the hole produced by drilling can be smoothed out. The device provides complete wall compensation and enables simultaneous drilling and seamless hole fixing, resulting in high efficiency. As the drill bit descends, the corrugated pipe gradually expands to accommodate water at a depth almost identical to the drilling depth, ensuring that the water pressure inside the corrugated pipe remains equal to the lateral pressure generated by the hole wall. This prevents hole wall collapse and ensures good drilling and forming results. After forming, the device can be easily removed from the hole by extracting the water from the corrugated pipe, facilitating subsequent use. Furthermore, the water inside the corrugated pipe is isolated from groundwater generated during drilling, preventing water pressure from affecting the normal laying of the corrugated pipe. Also, the corrugated pipe does not directly contact the sharp points of the hole wall during laying.It does not generate relative sliding friction with the cement wall, making it suitable for drilling deep holes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the overall structure of a mud pump pressure reduction device for an engineering survey drilling rig according to the present invention, after partial cross-section.

[0018] Figure 2 This is a front view of the overall structure of the mud pump pressure reduction device of an engineering survey drilling rig according to the present invention, after partial cross-section of the drill bit in the mating state.

[0019] Figure 3 This is a top view of the drill bit of a mud pump pressure reducing device for an engineering survey drilling rig according to the present invention;

[0020] Figure 4 This is a bottom view of the drill bit of a mud pump pressure reducing device for an engineering survey drilling rig according to the present invention.

[0021] Figure 5 This invention relates to a pressure reducing device for a mud pump in an engineering survey drilling rig. Figure 1 and Figure 2 A magnified view of a portion of point A.

[0022] In the diagram, 1 is the drill rod, 2 is the drill bit, 3 is the first annular pipe, 4 is the first channel, 5 is the mud pump, 6 is the bellows, 7 is the second annular pipe, 8 is the nozzle, 9 is the second channel, 10 is the drive motor, 11 is the fixing component, 12 is the slot, 13 is the threaded ring, 14 is the threaded groove, 15 is the fixing column, 16 is the pressure plate, 17 is the fixing hole, 18 is the column body, 19 is the fixing plate, 20 is the sleeve, 21 is the connecting pipe, 22 is the counterweight, 23 is the first annular groove, 24 is the second annular groove, 25 is the ball bearing, 26 is the branch pipe, 27 is the check valve, 28 is the slot, 29 is the recess, 30 is the spring, 31 is the locking block, and 32 is the fixing part. Detailed Implementation

[0023] To better understand the technical content of this invention, specific embodiments are provided below, and the invention will be further described in conjunction with the accompanying drawings.

[0024] See Figures 1 to 5This invention provides a mud pump pressure relief device for an engineering survey drilling rig, comprising a drilling mechanism. The bottom of the drilling mechanism has several drill rods 1 connected by a connecting mechanism. The bottom of each drill rod 1 has a drill bit 2 fixedly connected thereto. The outer periphery of each drill bit 2 has a first annular tube 3 detachably connected thereto. The surface of each drill bit 2 has several first channels 4 extending to the top of the drill rods 1. The top of each first channel 4 has a mud pump 5 connected thereto. The device also includes a fixing mechanism for fixing to the ground. The bottom of the fixing mechanism has a corrugated pipe 6 fixedly connected thereto. The bottom of the corrugated pipe 6 has a sliding assembly fixedly connected thereto. The top of the sliding assembly has a second annular tube 3. The first annular pipe 3 has several nozzles 8 at its top. The drill rod 1 and the drill bit 2 have interconnected second channels 9, which are connected to the nozzles 8 and used for cement injection. The drill rod 1 passes through the sliding assembly and rotates relative to it. The interior of the corrugated pipe 6 is connected to an external water source. The mud pump 5 is electrically connected to an external power source. Through the drilling mechanism and the cooperation of multiple drill rods 1 and drill bits 2, the drilling depth of this device can be extended to the actual required depth. Because the fixing mechanism is fixed to the ground and completely blocks the area between the corrugated pipe 6 and the borehole wall, cement surging after subsequent cement injection is avoided. When the drill rod 1 moves downward under the drive of the drilling mechanism, the bellows 6, which are in a stacked state, are gradually pulled out from inside the second annular pipe 7. Moreover, the length of the fully expanded bellows 6 in the stacked state is much greater than the length of a single drill rod 1, making it suitable for most drilling operations and ensuring strong continuity of drilling work. Water is gradually injected into the bellows 6 through an external water source, allowing the bellows 6 to expand normally. Meanwhile, the mud pump 5 can pump out the gravel, underground seepage water, and soil generated during drilling through the first channel 4 inside the drill rod 1, thus ensuring stable and reliable drilling work. If any of the mud pumps 5 becomes blocked, causing an increase in pressure, [the following will occur]. The pump is stopped, and the first channel 4 corresponding to the mud pump 5 is cleaned to prevent the pump cover from shattering and flying out, causing injury, due to excessive pump pressure. This also ensures that the device can continuously drill without stopping operation. Simultaneously, the second channel 9 inside the drill rod 1 can spray cement through the second annular pipe 7 to cover the borehole wall. Under the water pressure inside the corrugated pipe 6, the limiting effect of the first annular pipe 3 and the second annular pipe 7, and the tight fit of the corrugated pipe 6, as well as the centrifugal force generated by the rotation of the drill rod 1 driving the water source inside the corrugated pipe 6, the uncured cement layer covering the borehole wall has good density, and air bubbles in the uncured cement layer are fully squeezed out.Furthermore, because the water pressure inside the corrugated pipe 6 is sufficient to compensate for the external pressure on the borehole wall, the uncured cement layer is almost immune to water seepage, preventing it from being washed away and failing to solidify effectively. Under prolonged fixation, the solidified cement wall exhibits strong integrity, resulting in high compressive strength. Moreover, the combination of the uncured cement layer, the corrugated pipe 6, and the water source within it completely compensates for the unevenness of the borehole wall caused by drilling, enabling simultaneous drilling and seamless hole solidification with high efficiency. As the drill bit 2 continues to descend, the corrugated pipe 6 gradually expands and accommodates the borehole depth almost reaching the specified depth. The use of water at a completely uniform depth ensures that the water pressure inside the corrugated pipe 6 remains equal to the lateral pressure generated by the borehole wall, preventing the borehole wall from collapsing and resulting in good drilling performance. After drilling, the water inside the corrugated pipe 6 can be extracted, allowing the device to be easily removed from the borehole for subsequent use. Furthermore, the water inside the corrugated pipe 6 is isolated from groundwater generated during drilling, preventing water pressure from affecting the normal laying of the corrugated pipe 6. During laying, the corrugated pipe 6 does not directly contact the sharp points of the borehole wall, and there is no relative sliding friction between it and the cement wall, making it suitable for drilling deep holes.

[0025] Specifically, the drilling mechanism includes a drive motor 10, the output end of which is fixedly connected to a fixing member 11. The top of the drill rod 1 is provided with a slot 12, and the fixing member 11 is inserted into the slot 12. The drive motor 10 is electrically connected to an external power source. The drive motor 10 is fixed on any construction machinery. Through the driving action of the drive motor 10, the drill rod 1 continues to drill. When a new drill rod 1 needs to be added, the fixing member 11 on the drive motor 10 is simply removed from the slot 12, and then another drill rod 1 is connected to the drill rod 1 below it through the connecting mechanism to complete the extension of the drill rod 1, thus making it suitable for drilling deeper holes.

[0026] Specifically, the connecting mechanism includes a threaded ring 13, and each drill rod 1 has an annular threaded groove 14 at its top. The inner circumference of the threaded groove 14 is a fixed post 15, which is fixedly connected to the drill rod 1. Adjacent drill rods 1 are threadedly connected by the threaded ring 13 and the threaded groove 14. The slot 12 is located at the top of the fixed post 15. Through the cooperation between the threaded ring 13 and the threaded groove 14, the assembly and disassembly of the drill rods 1 are relatively simple, convenient to use, and applicable to drilling work at different depths.

[0027] Specifically, the fixing mechanism includes an annular pressure plate 16, the top of the corrugated pipe 6 is fixedly connected to the pressure plate 16, the pressure plate 16 is provided with a plurality of fixing holes 17, the pressure plate 16 abuts against the ground, and also includes a plurality of piles, the piles being inserted into the ground through the fixing holes 17. Through the cooperation between the pressure plate 16, the fixing holes 17 and the piles, the device can be stably fixed on the ground. At the same time, the pressure plate 16 can limit the cement, preventing the cement from surging upwards and causing the cement wall to fail to form a complete wall structure.

[0028] Specifically, the fixing member 11 is provided with a fixing plate 19 fixedly connected thereto. The fixing plate 19 is provided with a plurality of sleeves 20 fixedly connected thereto. The sleeves 20 are used to accommodate the mud pump 5. The mud pump 5 is provided with a connecting pipe 21. The connecting pipe 21 is inserted into the first channel 4. Through the action of the sleeves 20 and the fixing plate 19, the mud pump 5 and the drill rod 1 can rotate synchronously, ensuring that the device can be used normally.

[0029] Specifically, the sliding component includes a counterweight 22, the top of which is fixedly connected to the bottom of the corrugated pipe 6. The bottom of the counterweight 22 is provided with a first annular groove 23, and the top of the drill bit 2 is provided with a second annular groove 24. The second annular groove 24 is provided with a plurality of balls 25, the tops of which are located in the first annular groove 23. Through the cooperation between the first annular groove 23 at the bottom of the counterweight 22 and the balls 25 in the second annular groove 24, and under the action of water pressure in the corrugated pipe 6, the counterweight 22 and the drill bit 2 can rotate relative to each other, thereby ensuring that the corrugated pipe 6 can be laid normally and avoiding shaking that would affect the forming effect of the cement wall.

[0030] Specifically, the top of the first annular pipe 3 is lower than the top of the second annular pipe 7. Through the cooperation between the first annular pipe 3 and the second annular pipe 7, the cement can be quickly fixed by the outer wall of the corrugated pipe 6 after being sprayed out and form a wall structure, thus preventing the cement from failing to form effectively.

[0031] Specifically, the connecting pipe 21 is provided with a branch pipe 26, and the branch pipe 26 is provided with a check valve 27. The branch pipe 26 is connected to an external high-pressure water source. Through the cooperation of the branch pipe 26 and the check valve 27, the extracted gravel, underground seepage water and soil can be prevented from overflowing through the branch pipe 26. At the same time, when the first channel 4 is blocked, the blockage can be impacted downward by the high-pressure water source, and then the mud pump 5 can be used to pump upward. By alternating the above process, the mixture at the blockage can move up and down, thereby changing the distribution position of the gravel and making it easier to clear the first channel 4. This avoids the problem of excessive pump pressure caused by the mud pump 5 being forcibly started.

[0032] Specifically, the drill bit 2 has a groove 28 on its side wall, and the inner wall of the first annular tube 3 has a fan-shaped recess 29. A spring 30 is installed in the groove 28. One end of the spring 30 is fixedly connected to the drill bit 2, and the other end of the spring 30 is provided with a locking block 31. The side of the locking block 31 is provided with a fixing part 32 with a fan-shaped cross-section that is fixedly connected to it. Through the cooperation between the groove 28, the recess 29, the spring 30 and the locking block 31, it can be used conveniently during the downward drilling process. Moreover, since the diameter of the first annular tube 3 is the same as the diameter of the cement wall, when it is necessary to remove this device, it can be simply pulled upwards to disengage the recess 29 from the fixing part 32, making it simple and convenient to use.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure reducing device for a mud pump in an engineering survey drilling rig, characterized in that, The system includes a drilling mechanism, with several drill rods connected to the bottom of the drilling mechanism via a connecting mechanism. A drill bit is fixedly connected to the bottom of each drill rod. A first annular tube is detachably connected to the drill bit's outer periphery. Several first channels are provided on the surface of the drill bit, extending to the top of the drill rod. A mud pump is connected to the top of each first channel. The system also includes a fixing mechanism for fixing the system to the ground. A corrugated pipe is fixedly connected to the bottom of the fixing mechanism. A sliding assembly is fixedly connected to the bottom of the corrugated pipe. A second annular tube is provided at the top of the sliding assembly. Several nozzles are provided at the top of the first annular tube. A second channel is interconnected between the drill rod and the drill bit, communicating with the nozzles. The second channel is used to introduce cement. The drill rod passes through the sliding assembly and rotates relative to it. The interior of the corrugated pipe is connected to an external water source. The mud pump is electrically connected to an external power source.

2. The pressure reducing device for a mud pump in an engineering exploration drilling rig according to claim 1, characterized in that, The drilling mechanism includes a drive motor, the output end of which is fixedly connected to a fixing component, the top of the drill rod is provided with a slot, the fixing component is inserted into the slot, and the drive motor is electrically connected to an external power source.

3. The pressure reducing device for a mud pump in an engineering exploration drilling rig according to claim 2, characterized in that, The connecting mechanism includes a threaded ring, and each drill rod has an annular threaded groove at its top. The inner circumference of the threaded groove is a fixed post, which is fixedly connected to the drill rod. Adjacent drill rods are threadedly connected through the threaded ring and the threaded groove, and the slot is located at the top of the fixed post.

4. The pressure reducing device for a mud pump in an engineering exploration drilling rig according to claim 1, characterized in that, The fixing mechanism includes an annular pressure plate, the top of the corrugated pipe is fixedly connected to the pressure plate, the pressure plate is provided with a plurality of fixing holes, the pressure plate abuts against the ground, and also includes a plurality of piles, the piles being inserted into the ground through the fixing holes.

5. A mud pump pressure reducing device for engineering exploration drilling rigs according to claim 2, characterized in that, The fixing member is provided with a fixing plate fixedly connected thereto, and the fixing plate is provided with a plurality of sleeves fixedly connected thereto. The sleeves are used to accommodate the mud pump. The mud pump is provided with a connecting pipe, and the connecting pipe is inserted into the first channel.

6. The pressure reducing device for a mud pump in an engineering exploration drilling rig according to claim 1, characterized in that, The sliding assembly includes a counterweight, the top of which is fixedly connected to the bottom of the bellows. The bottom of the counterweight is provided with a first annular groove, and the top of the drill bit is provided with a second annular groove. A plurality of balls are provided in the second annular groove, and the tops of the balls are located in the first annular groove.

7. The pressure reducing device for a mud pump in an engineering exploration drilling rig according to claim 1, characterized in that, The top of the first annular tube is lower than the top of the second annular tube.

8. The pressure reducing device for a mud pump in an engineering exploration drilling rig according to claim 5, characterized in that, The connecting pipe is equipped with a branch pipe, and the branch pipe is equipped with a check valve. The branch pipe is connected to an external high-pressure water source.

9. A mud pump pressure reducing device for an engineering exploration drilling rig according to claim 1, characterized in that, The drill bit has a slot on its side wall, and the inner wall of the first annular tube has a recessed part with a fan-shaped cross-section. A spring is installed in the slot, one end of the spring is fixedly connected to the drill bit, and the other end of the spring is provided with a locking block. The side of the locking block is provided with a fixing part with a fan-shaped cross-section that is fixedly connected to it.

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