Coke cleaning and slag flushing drill bit
By designing a coke-clearing slag drill bit, using high-pressure liquid jetting and sphere switching mechanisms, the problems of low efficiency, high safety risks and high cost in the prior art are solved, and integrated drilling and slag punching are achieved, reducing risks and saving costs.
Patent Information
- Application Number
- CN202422413510.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The existing coking and slag removal methods have problems such as low efficiency, high safety risks and high cost. Especially when all drilling tools are not available to replace the drill bit, it is difficult to achieve integrated drilling and slag punching operations.
A coke-clearing slag drill bit is designed, including a drill bit body, a valve core assembly and a ball. By setting bypass water holes and valve core fixing holes on the side of the drill bit body, the drill holes and slag switching is achieved using high-pressure liquid jets and the design of the ball to avoid changing the drill bits.
The integrated operation of drilling and slag flushing is achieved, which reduces the risks of operators, improves the efficiency of coking and slag removal, and saves the cost of drill bits.
Smart Images
Figure CN223203016U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coke slag removal equipment for a petroleum refining slurry bed reactor, and more specifically to a coke cleaning and slag flushing drill bit. Background Art
[0002] In the oil refining industry, residue hydrotreating technology using slurry bed reactors can be used to refine heavy or low-quality crude oil into light gasoline, creating significant economic benefits. However, during the refining process, power outages or other failures can disrupt the slurry bed reactor, creating a 10- to 30-meter-thick slag plug within the reactor, paralyzing the entire residue hydrotreating unit and causing significant economic losses.
[0003] When slag clogs the slurry bed reactor, it must be removed to restore the entire residue oil hydrotreating unit to normal operation. Existing methods for coke removal and slag removal include: manual deslagging, which is inefficient and carries high safety risks; hydraulic flushing by specialized flushing teams, but this is ineffective due to the large diameter, thickness, and hardness of the slag; and drilling, a method that integrates upstream and downstream oil production. This method involves drilling first and then flushing, eliminating the need for manual entry into the reactor. While this method offers the advantages of rapid progress, high efficiency, and minimal risk of personal injury, it requires the drill bit to be removed from the reactor after drilling and replaced with a slag flushing drill bit. This slag flushing drill bit utilizes hydraulic pressure to flush the surrounding slag layer. However, replacing the drill bit at the top of the slurry bed reactor, 70 to 80 meters above ground, slows down deslagging and increases the risk of injury. Furthermore, the cost of using two new drill bits for each operation is significant.
[0004] In the above situation, an urgent problem to be solved is: how to realize the integrated operation of drilling and slag flushing without removing all drilling tools to replace the drill bit, improve personal safety, increase the efficiency of coke and slag removal, and save the cost of drill bits. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides a coke cleaning and slag flushing drill bit, which can realize the integrated operation of drilling and slag flushing without removing all drilling tools to replace the drill bit, thereby reducing the risk of operators, improving the efficiency of coke cleaning and slag removal, and saving the cost of the drill bit.
[0006] The utility model provides a coke cleaning and slag flushing drill bit, comprising a drill bit body and a valve core assembly, wherein a bypass water hole and a valve core fixing hole are opened on the side of the drill bit body;
[0007] It also includes a valve core fixing member, which is used to install the valve core assembly inside the drill bit body after passing through the valve core fixing hole so that the valve core assembly covers the bypass water hole;
[0008] The bottom of the drill body is provided with a through hole and a drilling component, wherein the through hole is used to eject the high-pressure liquid passing through the valve core assembly to achieve coke removal;
[0009] It also includes a sphere with a diameter larger than the diameter of the valve seat water eye in the valve core assembly, and the sphere is used to be thrown into the valve core assembly and sit in the valve seat water eye until the valve core assembly is subjected to a pressure greater than a preset pressure threshold, and then the valve core fixing part is cut off to make the valve core assembly fall a preset distance to expose the bypass water eye, and the high-pressure liquid passes through the bypass water eye to be horizontally sprayed outward to achieve slag flushing.
[0010] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the drill bit body includes a joint body, a conical cylinder and a spherical wheel body which are arranged in sequence, the interior of the joint body is a joint body water eye, and the upper part of the joint body has an internal thread, the interior of the conical cylinder is a conical cylinder water eye which communicates with the joint body water eye, the interior of the spherical wheel body is a spherical wheel body water eye which communicates with the conical cylinder water eye, the spherical wheel body water eye is communicated with the through hole, and the joint body water eye and the conical cylinder water eye are transitionally connected by a valve core seat water eye, the diameter of the valve core seat water eye gradually shrinks from the diameter of the joint body water eye to the diameter of the conical cylinder water eye, and after the valve core fixing part is cut off, the valve core assembly falls down to sit in the valve core seat water eye.
[0011] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the drilling component includes a plurality of ball wheel teeth located at the outer periphery of the ball wheel body and a scraper body located at the outer periphery of the conical cylinder.
[0012] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the scraper body includes scraper teeth and scraper ribs arranged along the axial direction of the drill bit body, and the scraper ribs are located on a side of the scraper teeth away from the ball wheel body.
[0013] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the valve core assembly includes a large tubular column body, a valve seat body and a small tubular column body which are arranged in sequence, the interior of the large tubular column body is a large tubular column water eye, the interior of the valve seat body is the valve seat water eye, the interior of the small tubular column body is a small tubular column water eye, and the diameter of the valve seat water eye gradually shrinks from the diameter of the large tubular column water eye to the diameter of the small tubular column water eye.
[0014] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the valve core assembly also includes a first sealing ring and a second sealing ring, the first sealing ring is sleeved in a first sealing ring groove opened near the upper part of the outer wall of the large tubular body, and the second sealing ring is sleeved in a second sealing ring groove opened near the lower part of the outer wall of the large tubular body, and the outer diameters of the first sealing ring and the second sealing ring are interference fit with the water hole of the joint body, the inner diameter of the first sealing ring is interference fit with the first sealing ring groove, and the inner diameter of the second sealing ring is interference fit with the second sealing ring groove.
[0015] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, a valve core fixing groove is opened on the outer wall of the large tubular body, and the valve core fixing groove is located between the first sealing ring groove and the second sealing ring groove, and matches the valve core fixing part. The valve core fixing part passes through the valve core fixing hole and then enters the valve core fixing groove to install the valve core assembly inside the drill bit body.
[0016] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the valve core fixing hole is located at the upper part of the bypass water eye, and the bypass water eye is located between the first sealing ring and the second sealing ring, and the distance between the bypass water eye and the first sealing ring is 10mm to 30mm.
[0017] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the sphere is a steel sphere.
[0018] Preferably, in the above-mentioned coke cleaning and slag flushing drill bit, the valve core fixing part is a pin-type countersunk screw.
[0019] It can be seen from the above technical solution that the above-mentioned coke cleaning and slag flushing drill bit provided by the utility model includes a drill bit body and a valve core assembly, and a bypass water eye and a valve core fixing hole are opened on the side of the drill bit body; it also includes a valve core fixing part, and the valve core fixing part is used to install the valve core assembly inside the drill bit body after passing through the valve core fixing hole so that the valve core assembly blocks the bypass water eye; the bottom of the drill bit body has a through hole and a drilling component, and the through hole is used to spray out the high-pressure liquid that passes through the valve core assembly to achieve coke cleaning; it also includes a sphere with a diameter larger than the diameter of the valve seat water eye in the valve core assembly, and the sphere is used to be thrown into the valve core assembly and sit in the valve seat water eye until the valve core assembly withstands a pressure greater than After the preset pressure threshold, the valve core fixing is cut off to make the valve core assembly fall a preset distance to expose the bypass water eye. The high-pressure liquid passes through the bypass water eye and is sprayed horizontally outward to achieve slag flushing. It can be seen that using this drill bit, you can drill and clear coke at the same time at the beginning. When the drilling is completed, you can put the ball in, and then stop drilling and switch to the horizontal slag flushing process to the outside. This does not require changing the drill bit to achieve the switch from coke clearing to slag flushing process. It can be seen that the drill bit can realize the integrated operation of drilling and slag flushing without having to remove all the drilling tools to replace the drill bit, thereby reducing the risk of operators, improving the efficiency of coke cleaning and slag removal, and saving the cost of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0021] Figure 1 This is a schematic diagram of the overall exterior of an embodiment of a coke cleaning and slag flushing drill bit provided by the utility model;
[0022] Figure 2 is a cross-sectional schematic diagram of the drill bit body;
[0023] Figure 3 It is a cross-sectional diagram of the valve core assembly. DETAILED DESCRIPTION
[0024] The core of this utility model is to provide a coke cleaning and slag flushing drill bit, which can realize the integrated operation of drilling and slag flushing without having to remove all drilling tools to replace the drill bit, thereby reducing the risk of operators, improving the efficiency of coke cleaning and slag removal, and saving the cost of the drill bit.
[0025] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0026] The utility model provides a coke cleaning and slag flushing drill bit. Figure 1 、 Figure 2 and Figure 3 As shown, Figure 1 This is an overall external schematic diagram of an embodiment of a coke cleaning and slag flushing drill bit provided by the utility model. Figure 2 is a cross-sectional diagram of the drill bit body. Figure 3 The figure is a cross-sectional view of the valve core assembly. The coke cleaning and slag flushing drill bit may include a drill body 1 and a valve core assembly 2. A bypass water hole 11 and a valve core fixing hole 12 are provided on the side of the drill body 1. The bypass water hole 11 is used to spray high-pressure water for slag flushing under specific circumstances. The valve core fixing hole 12 is used to assist in fixing the valve core assembly 2 inside the drill body 1.
[0027] The drill bit 1 further includes a valve core fixing member 3, which is used to pass through the valve core fixing hole 12 and then install the valve core assembly 2 inside the drill bit body 1 so that the valve core assembly 2 blocks the bypass water hole 11. In this way, in the initial state, the high-pressure water cannot be ejected from the bypass water hole 11, but can only pass downward through multiple water holes and then be ejected downward from the drill bit to achieve the coke clearing operation;
[0028] The bottom of the drill body 1 has a through hole 13 and a drilling component 14. The through hole 13 is used to eject high-pressure liquid passing through the valve core assembly 2 to achieve coke cleaning. This is the initial coke cleaning operation. After drilling and coke cleaning are completed, the process is switched to the slag flushing process.
[0029] It also includes a valve seat water hole 21 (such as Figure 3 The sphere 4 is used to be thrown into the valve core assembly 2 and sit in the valve seat water hole 21. At this time, the valve seat water hole 21 can be blocked by the sphere 4 until the valve core assembly 2 is subjected to a pressure greater than a preset pressure threshold. The valve core fixing member 3 is cut off to make the valve core assembly 2 fall a preset distance to expose the bypass water hole 11. The high-pressure liquid passes through the bypass water hole 11 and is horizontally sprayed outward to achieve slag flushing. It can be seen that the switching between the coke cleaning and slag flushing processes does not require changing the drill bit, but only requires throwing in a sphere, which greatly facilitates the process switching and is safer.
[0030] It can be seen from the above technical solution that in the embodiment of the above-mentioned coke cleaning and slag flushing drill bit provided by the utility model, since it includes a drill bit body and a valve core assembly, a bypass water eye and a valve core fixing hole are opened on the side of the drill bit body; it also includes a valve core fixing part, and the valve core fixing part is used to install the valve core assembly inside the drill bit body after passing through the valve core fixing hole so that the valve core assembly blocks the bypass water eye; the bottom of the drill bit body has a through hole and a drilling component, and the through hole is used to spray out the high-pressure liquid that passes through the valve core assembly to achieve coke cleaning; it also includes a sphere with a diameter larger than the diameter of the valve seat water eye in the valve core assembly, and the sphere is used to be thrown into the valve core assembly and sit in the valve seat water eye until the valve core assembly withstands pressure After the force is greater than the preset pressure threshold, the valve core fixing part is cut off to make the valve core assembly fall a preset distance to expose the bypass water eye, and the high-pressure liquid passes through the bypass water eye to be sprayed horizontally outward to achieve slag flushing. It can be seen that using this drill bit, you can drill and clear coke at the same time at the beginning. When the drilling is completed, you can put the ball in, and then stop drilling, and switch to the horizontal slag flushing process to the outside. This does not require changing the drill bit to achieve the switch from coke clearing to slag flushing process. It can be seen that the drill bit can realize the integrated operation of drilling and slag flushing without having to remove all the drilling tools to replace the drill bit, thereby reducing the risk of operators, improving the efficiency of coke cleaning and slag removal, and saving the cost of the drill bit.
[0031] In a specific embodiment of the above-mentioned coke cleaning and slag flushing drill bit, the drill bit body 1 can specifically include a joint body A, a conical cylinder B and a ball wheel body C arranged in sequence, the conical cylinder B is connected to the lower end of the joint body A, the ball wheel body C can be welded to the lower end of the conical cylinder B, and becomes one with the conical cylinder B, the ball wheel body C can be processed by a steel ball, the above-mentioned through hole 13 and the drilling component 14 are both located on the ball wheel body C, and the through hole 13 can be opened at the center position and the circumferential position of the ball wheel body C at the same time, the number of through holes 13 opened at the circumferential position can preferably be 2 to 3, the drilling component 14 can be an alloy steel tooth evenly embedded in the outer wall of the ball wheel body C, the alloy The shape of the steel teeth can preferably be wedge-shaped, with the inside of the joint body A being the joint body water eye A1, and the upper part of the joint body A having an internal thread A2, the inside of the conical cylinder B being the conical cylinder water eye B1 communicating with the joint body water eye A1, the inside of the spherical wheel body C being the spherical wheel body water eye C1 communicating with the conical cylinder water eye B1, the spherical wheel body water eye C1 communicating with the above-mentioned through hole 13, and the joint body water eye A1 and the conical cylinder water eye B1 being transitionally connected via the valve core seat water eye D1, the diameter of the valve core seat water eye D1 gradually shrinks from the diameter of the joint body water eye A1 to the diameter of the conical cylinder water eye B1, and after the valve core fixing part 3 is cut off, the valve core assembly 2 falls to sit in the valve core seat water eye D1.
[0032] To facilitate installation of the valve core assembly 2, the diameter of the internal thread A2 is greater than the diameter of the connector body water hole A1, greater than the diameter of the lower end of the valve core seat water hole D1, and greater than the diameter of the conical cylindrical water hole B1. Furthermore, the connector body water hole A1, the valve core seat water hole D1, and the conical cylindrical water hole B1 are clearance-matched with the body of the valve core assembly 2. To secure the valve core assembly 2, the outer wall of the connector body A preferably has two symmetrical valve core fixing holes. To ensure more uniform slag jetting after the valve core assembly 2 is seated in the valve core seat water hole D1, the outer wall of the connector body A also preferably has multiple symmetrical bypass water holes. To achieve high-pressure slag jetting, the diameter of the water hole in the drill bit body 1 gradually decreases from top to bottom. Specifically, the diameter of the connector body water hole A1 is greater than the diameter of the lower end of the valve core seat water hole D1, greater than the diameter of the conical cylindrical water hole B1, and greater than the diameter of the ball wheel water hole C1. In other words, the diameter gradually decreases along the direction of water flow, thereby increasing the water pressure, thereby maximizing the water pressure during jetting.
[0033] In this case, after the valve core assembly 2 is inserted into the water hole A1 of the joint body, it can be used to control the switch and flow direction of water. Moreover, the diameter of the above-mentioned ball wheel body C is larger than the diameter of the conical cylinder B, which facilitates welding and makes it more secure. The diameter of the ball wheel body C is smaller than the diameter of the joint body A, which can play a better leading role when drilling.
[0034] In another specific embodiment of the above-mentioned coke cleaning and slag flushing drill bit, continue to refer to Figure 2 The drilling component 14 may include a plurality of ball wheel teeth 141 located on the outer periphery of the ball wheel body C and a scraper body 142 located on the outer periphery of the conical cylinder B. The scraper body 142 may be multiple and symmetrically welded to the outer wall circumference of the conical cylinder B. This can achieve uniform force in all directions of the entire circumference during the hole expansion process, thereby not easily causing the entire drill bit to tilt during the drilling process. It can be cut into an "L" shape from a steel plate with a thickness of 10mm to 20mm and a length of 100mm to 200mm. The number can be 3 to 6. Further, refer to Figure 1 The scraper body 142 may include scraper teeth 1421 and scraper ribs 1422 arranged along the axial direction of the drill bit body 1, and the scraper ribs 1422 are located on the side of the scraper teeth 1421 away from the ball wheel body C. The scraper ribs 1422 may preferably be symmetrically welded to the outer walls of the conical cylinder and the joint body to achieve uniform force. The lower end face thereof may be in the same plane as the lower end face of the conical cylinder, and the upper end face thereof may be located at the lower portion of the outer wall of the joint body. The scraper teeth 1421 may be serrated, the number of which may be 3 to 5, and the tooth length may be 10 mm to 15 mm. In this case, the drill bit can realize both drilling and reaming, both coke cleaning and conveniently switching to the slag flushing process, realizing integrated operation, making coke cleaning and slag flushing faster, more efficient, requiring less investment, and having lower safety risks.
[0035] In another specific embodiment of the above-mentioned coke cleaning and slag flushing drill bit, the valve core assembly 2 may include a large tubular column E, a valve seat body F and a small tubular column G arranged in sequence. It can be made of alloy steel as a whole and is funnel-shaped. The inside of the large tubular column E is a large tubular column water eye E1, and the large tubular column water eye E1 is clearance-matched with the joint body water eye A1. The inside of the valve seat body F is the above-mentioned valve seat water eye 21, and the valve seat body F is an inverted trapezoid, and its lower water eye diameter is smaller than the diameter of the sphere 4, and its outer diameter is clearance-matched with the valve core seat water eye D1. The inside of the small tubular column G is the small tubular column water eye G1, and the diameter of the valve seat water eye 21 gradually shrinks from the diameter of the large tubular column water eye E1 to the diameter of the small tubular column water eye G1, and the diameter of the large tubular column water eye E1 is greater than the diameter of the valve seat water eye 21, and the diameter of the sphere 4 is greater than the diameter of the small tubular column water eye G1. In this case, when the hole is drilled and it is necessary to expand the hole and clear the coke, the kelly drill rod can be removed and the ball 4 can be dropped into the valve seat water hole 21 of the valve core assembly 2 in the drill bit body 1. After the ball 4 falls, it sits in the valve seat water hole 21 to block the valve seat water hole 21, so that water can no longer pass through the valve seat water hole 21 and enter the small pipe column water hole G1. As the water in the valve core assembly 2 increases, the water pressure increases. When the water pressure reaches a certain limit, the valve core fixing member 3 can no longer withstand this pressure and breaks, and it can no longer support the valve core assembly 2. In this way, the valve core assembly 2 falls downward under the action of gravity and reaches The valve core seat water hole D1 is located and remains stationary here, at this time the valve core seat water hole D1 is blocked, and water cannot flow out from here, and at the same time, the bypass water hole 11 is no longer blocked by the valve core assembly 2, and water is sprayed out from these bypass water holes 11. The spraying direction is generally along the horizontal direction, but it is not limited. It can also be sprayed out at a certain angle to the horizontal direction, thereby achieving the effect of flushing slag around. It can be seen that the entire operation only requires the input of a sphere to achieve step switching, and there is no need to replace the drill bit, and the cost of a drill bit is saved, which not only improves efficiency but also reduces production costs.
[0036] In a preferred embodiment of the above-mentioned coke cleaning and slag flushing drill bit, the valve core assembly 2 also includes a first sealing ring 22 and a second sealing ring 23. The material of these two sealing rings can preferably be rubber or nylon, and the shape of the sealing rings used can be square or circular, which is not limited here. The first sealing ring 22 is sleeved in the first sealing ring groove E2 opened near the upper part of the outer wall of the large tubular body E, and the second sealing ring 23 is sleeved in the second sealing ring groove E3 opened near the lower part of the outer wall of the large tubular body E. The groove width of the first sealing ring groove E2 matches the first sealing ring, and can be a square groove or a circular groove, and the outer diameters of the first sealing ring 22 and the second sealing ring 23 are interference fit with the water hole A1 of the joint body, the inner diameter of the first sealing ring 22 is interference fit with the first sealing ring groove E2, and the inner diameter of the second sealing ring 23 is interference fit with the second sealing ring groove E3.
[0037] Furthermore, a valve core fixing groove E4 is opened on the outer wall of the large tubular body E, and the valve core fixing groove E4 is located between the first sealing ring groove E2 and the second sealing ring groove E3, and matches the valve core fixing part 3. The valve core fixing part 3 passes through the valve core fixing hole 12 and enters the valve core fixing groove E4 to install the valve core assembly 2 inside the drill bit body 1. The valve core fixing groove E4 can preferably be a circular groove.
[0038] In another preferred embodiment of the above-mentioned coke cleaning and slag flushing drill bit, the valve core fixing hole 12 is located at the upper part of the bypass water hole 11, and the bypass water hole 11 is located between the first sealing ring 22 and the second sealing ring 23. The distance between the bypass water hole 11 and the first sealing ring 22 is preferably 10mm to 30mm. In this case, during assembly, the sealing ring is mounted on the large tubular body E of the valve core assembly 2, and then the valve core assembly 2 is inserted into the joint water hole A1, so that the bypass water hole 11 is between the upper sealing ring and the lower sealing ring, and between 10mm and 30mm away from the upper sealing ring 31. Finally, the valve core assembly 2 and the drill bit body 1 are fixed together with the valve core fixing member 3. Of course, this distance can be adjusted according to actual needs and is not limited here.
[0039] In each embodiment of the above-mentioned coke cleaning and slag flushing drill bit, the above-mentioned sphere 4 can preferably be a steel sphere, which has higher hardness and strength, will not be damaged by high-pressure water impact, and can effectively form a water hole barrier, thereby switching the working mode. Of course, other materials can also be selected according to actual needs, and there is no restriction here. In addition, the valve core fixing member 3 can preferably be a pin-type countersunk screw, and its pressure bearing capacity can preferably be 3MPa to 5MPa. In this way, it can effectively fix the valve core assembly in the initial state to prevent it from falling, and can be broken under high water pressure to achieve the switch from the coke cleaning process to the slag flushing process. Of course, other types of valve core fixing members can also be selected according to actual needs, as long as it can ensure that these functions can be achieved.
[0040] When using the above-mentioned coke cleaning and slag flushing drill bit, connect the assembled drill bit to the bottom of the power drill, connect the power drill system, the liquid supply system and the liquid drainage system, start the pump to supply liquid, and the high-pressure liquid passes through the liquid supply system, the joint body water hole A1 of the valve core assembly 2 in the drill body 1, the conical cylinder water hole B1, the ball wheel body water hole C1, and finally passes through the through hole 13 and is sprayed onto the coke slag. The drill bit rotates under the rotation of the power drill, thereby quickly drilling the coke slag. When the drilling is completed and the slag needs to be flushed, remove the square drill rod, put the ball 4 into the water hole of the valve core assembly 2 in the drill body 1, and then connect the upper drill rod, start the pump to supply liquid, and Under the push of hydraulic pressure, the ball 4 sits in the valve seat water eye 21 of the valve core assembly 2. Since the diameter of the lower water eye of the valve seat water eye 21 is smaller than the diameter of the ball 4, the valve seat water eye 21 is closed, and the high-pressure liquid cannot pass through the ball wheel water eye C1. When the liquid is pumped continuously, the pressure in the water eye becomes greater and greater, and the pressure on the valve core assembly 2 also becomes greater and greater. When the pressure-bearing capacity of the valve core fixing part 3 is exceeded, the valve core fixing part 3 is cut off, and the valve core assembly 2 falls and sits on the valve core seat water eye D1, thereby exposing the bypass water eye 11. The high-pressure liquid will be sprayed straight from the bypass water eye 11 to the coke slag layer around the drilled hole, thereby achieving slag flushing.
[0041] The above-mentioned coke cleaning and slag flushing drill bit provides a channel for high-pressure liquid to be sprayed vertically downward from the water hole C1 of the spherical wheel body and in a circular manner at an angle of 30 degrees to the vertical direction through the water hole of the drill bit body 1 and the water hole of the valve core assembly 2, thereby ensuring that the drill bit rotates and sprays under the drive of the power drill, thereby realizing the coke slag layer drilling operation and slag cleaning; through the coordinated design of the sphere 4 and the valve core seat water hole D1 of the valve core assembly 2, the normal flow path of the high-pressure liquid is blocked, forming high pressure, so that the valve core assembly 2 is under pressure, the valve core fixing part 3 is sheared off, the valve core assembly 2 falls, and the bypass water hole 11 is exposed, so that the high-pressure liquid is sprayed out straightly, impacting and cleaning the coke slag outside the drill hole, and the drill bit is lifted up and lowered to complete the entire slag flushing operation; the valve core assembly 2 and the drill bit body 1 are sealed by the sealing ring, ensuring that all high-pressure liquid during drilling passes through the water hole C1 of the spherical wheel body and then sprayed out from the through hole 13. This solution achieves both drilling and reaming through the structural design of the ball wheel and scraper body of the drill bit 1. The coordinated design of the drill bit, valve core assembly, and ball changes the direction of the liquid flow path, achieving lateral slag flushing. Using this drill bit simultaneously achieves integrated drilling, reaming, and slag flushing operations, making coke cleaning and slag flushing faster, more efficient, less expensive, and less risky.
[0042] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A coke cleaning and slag flushing drill bit, characterized in that: It includes a drill body and a valve core assembly, wherein the side of the drill body is provided with a bypass water hole and a valve core fixing hole; It also includes a valve core fixing member, which is used to install the valve core assembly inside the drill bit body after passing through the valve core fixing hole so that the valve core assembly covers the bypass water hole; The bottom of the drill body is provided with a through hole and a drilling component, wherein the through hole is used to eject the high-pressure liquid passing through the valve core assembly to achieve coke removal; It also includes a sphere with a diameter larger than the diameter of the valve seat water eye in the valve core assembly, and the sphere is used to be thrown into the valve core assembly and sit in the valve seat water eye until the valve core assembly is subjected to a pressure greater than a preset pressure threshold, and then the valve core fixing part is cut off to make the valve core assembly fall a preset distance to expose the bypass water eye, and the high-pressure liquid passes through the bypass water eye to be horizontally sprayed outward to achieve slag flushing.
2. The coke cleaning and slag flushing drill bit according to claim 1, characterized in that: The drill bit body includes a joint body, a conical cylinder and a spherical wheel body which are arranged in sequence. The interior of the joint body is a joint body water eye, and the upper part of the joint body has an internal thread. The interior of the conical cylinder is a conical cylinder water eye which communicates with the joint body water eye. The interior of the spherical wheel body is a spherical wheel body water eye which communicates with the conical cylinder water eye. The spherical wheel body water eye is communicated with the through hole, and the joint body water eye and the conical cylinder water eye are transitionally connected by a valve core seat water eye. The diameter of the valve core seat water eye gradually shrinks from the diameter of the joint body water eye to the diameter of the conical cylinder water eye, and after the valve core fixing part is cut off, the valve core assembly falls to sit in the valve core seat water eye.
3. The coke cleaning and slag flushing drill bit according to claim 2, characterized in that: The drilling component includes a plurality of ball wheel teeth located at the outer periphery of the ball wheel body and a scraper body located at the outer periphery of the conical cylinder.
4. The coke cleaning and slag flushing drill bit according to claim 3, characterized in that: The scraper body comprises scraper teeth and scraper ribs arranged along the axial direction of the drill bit body, and the scraper ribs are located on a side of the scraper teeth away from the spherical wheel body.
5. The coke cleaning and slag flushing drill bit according to claim 4, characterized in that: The valve core assembly includes a large tubular body, a valve seat body and a small tubular body arranged in sequence. The interior of the large tubular body is a large tubular water eye, the interior of the valve seat body is the valve seat water eye, and the interior of the small tubular body is a small tubular water eye. The diameter of the valve seat water eye gradually decreases from the diameter of the large tubular water eye to the diameter of the small tubular water eye.
6. The coke cleaning and slag flushing drill bit according to claim 5, characterized in that: The valve core assembly also includes a first sealing ring and a second sealing ring. The first sealing ring is sleeved in a first sealing ring groove opened near the upper part of the outer wall of the large tubular body, and the second sealing ring is sleeved in a second sealing ring groove opened near the lower part of the outer wall of the large tubular body. The outer diameters of the first sealing ring and the second sealing ring are interference fit with the water hole of the joint body, the inner diameter of the first sealing ring is interference fit with the first sealing ring groove, and the inner diameter of the second sealing ring is interference fit with the second sealing ring groove.
7. The coke cleaning and slag flushing drill bit according to claim 6, characterized in that: A valve core fixing groove is provided on the outer wall of the large tubular body. The valve core fixing groove is located between the first sealing ring groove and the second sealing ring groove and matches the valve core fixing piece. The valve core fixing piece passes through the valve core fixing hole and enters the valve core fixing groove to install the valve core assembly inside the drill bit body.
8. The coke cleaning and slag flushing drill bit according to claim 7, characterized in that: The valve core fixing hole is located above the bypass water eye, and the bypass water eye is located between the first sealing ring and the second sealing ring. The distance between the bypass water eye and the first sealing ring is 10 mm to 30 mm.
9. The coke cleaning and slag flushing drill bit according to any one of claims 1 to 8, characterized in that: The sphere is a steel sphere.
10. The coke cleaning and slag flushing drill bit according to any one of claims 1 to 8, characterized in that: The valve core fixing piece is a pin-type countersunk screw.