Anti-sticking drill bit and slag container
By combining a beveled drill bit with a storage slot in the drill bit design, the problem of stuck drill bits caused by unstable formations during exploration drilling was solved, achieving the effects of preventing stuck drill bits and preventing drill bit burial, and reducing construction costs.
Patent Information
- Application Number
- CN202423232341.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-26
AI Technical Summary
During engineering exploration and drilling, drilling tools are prone to getting stuck or buried due to phenomena such as collapse, sand settling, and differential pressure jamming caused by poor formation self-stability or rock mass fracture, resulting in equipment loss and project delays.
Design a slanted drill bit and slag collection device to prevent drill bit jamming. The device includes a slanted drill bit, a straight pipe outer wall, a female connector and a male connector. An inner storage groove is provided between the drill rod and the straight pipe outer wall. The angle of the slanted drill bit is 30° to 60°. It has the function of storing debris and settling sand, and can drill upward to cut debris through the slanted drill bit to prevent drill bit jamming.
It effectively prevents drill bit jamming and drill bit burial, reduces project losses and lowers construction costs. Its simple structure makes it easy to implement and it is suitable for various strata, especially fractured rock and soft soil.
Smart Images
Figure CN223594108U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of surveying and drilling construction, and particularly relates to a bevel bit and slag containing device for preventing drill pipe sticking. BACKGROUND
[0002] In the process of engineering surveying and drilling, local strata are poor in self-stability or broken in rock mass, and the hole wall is collided, extruded and scratched when the core drill is taken up and down, so that the soil or rock mass of the drill hole side wall collapses or falls in pieces, and the falling objects are often accumulated in the top of the core tube and the gap of the drill hole side wall, which causes the drill pipe to be unable to be normally pulled up, lowered or rotated in the well, and the drill pipe sticking phenomenon occurs.
[0003] (1) differential pressure sticking: this is caused by the pressure difference between the drill pipe and the well wall, which causes the drill pipe to be "adsorbed" on the well wall. When there is a large difference between the drilling mud pressure and the formation pore pressure, a lateral force will be generated between the drill pipe and the well wall. If the lateral force is large enough, combined with the friction between the drill pipe and the well wall, the drill pipe will be stuck. For example, in a permeable formation, when the drilling mud density is too high, this situation is likely to occur.
[0004] (2) sand sticking: when the drilling mud circulation stops or is not smooth, the cuttings (sand) will accumulate around the drill bit or drill pipe. If the accumulation is too much, it will hinder the movement of the drill pipe, causing the drill pipe to be stuck. For example, in some broken rock mass, when the mud pump fails, sand sticking may occur in a short time.
[0005] (3) well wall collapse sticking: due to the instability of the strata, the rock or soil of the well wall collapses, and the falling objects bury or stick the drill pipe. In the collapsible strata, such as loose sand layer or poorly cemented mudstone layer, when the drilling mud performance is poor (too thin or slurry leakage) or the drilling mud pressure is not properly controlled, the well wall collapse is likely to occur.
[0006] (4) shrinkage sticking: the wellbore diameter will be reduced (shrinkage) under the influence of some factors, such as strata pressure change, chemical action, etc. When the outer diameter of the drill pipe is larger than the diameter of the shrinkage wellbore, the drill pipe will be stuck. For example, in some strata containing swelling clay minerals, they will swell after encountering water, which will cause the wellbore to shrink.
[0007] Drill pipe sticking often causes the drill pipe to be unable to be taken out, further causing the drill pipe to be buried, directly causing the economic loss of the drilling equipment, and seriously affecting the adjustment of the engineering foundation scheme, even the change of the line scheme, causing the increase of the construction period and cost, and having a great impact.
[0008] The common method for preventing the drill pipe from being stuck is to adjust the density, viscosity and water loss of the drilling mud to prevent the drill pipe from being stuck. For example, the density of the drilling mud is properly increased in the easy-caving formation so that the well wall can be supported to prevent the well wall from collapsing and the drill pipe from being stuck. Meanwhile, the water loss of the drilling mud is properly controlled to reduce the hydration and expansion of the clay minerals in the formation and to avoid the drill pipe from being stuck due to the reduction in diameter.
[0009] Meanwhile, the drilling speed, the drilling pressure and the rotation speed are properly adjusted according to the formation characteristics. For example, the drilling speed is properly increased in the soft formation, and the drilling pressure is properly controlled to prevent the drill bit from excessively cutting into the formation and causing the drill pipe to be stuck. In the hard formation, the drilling speed is properly reduced, and the drilling pressure and the rotation speed are properly matched to ensure that the drill bit can effectively crush the rock and reduce the risk of the drill pipe being stuck.
[0010] However, the method for preventing the drill pipe from being stuck in the prior art is usually too complex and difficult to implement. SUMMARY
[0011] In order to solve the above technical defects in the prior art, the utility model provides a slanting mouth drill bit and a slag holding device for preventing the drill pipe from being stuck, which can store the cuttings and the sand during the drilling process, has the upward drilling function, prevents the drill pipe from being stuck and buried, and can prevent the drill pipe from being stuck and buried.
[0012] The technical solution for achieving the utility model comprises the following steps:
[0013] A slanting mouth drill bit and a slag holding device for preventing the drill pipe from being stuck, comprising a slanting mouth drill bit, a straight pipe outer wall, a female joint and a male joint.
[0014] The slanting mouth drill bit is arranged on the straight pipe outer wall and is fixedly connected with the straight pipe outer wall.
[0015] The straight pipe outer wall is internally provided with an internal drill rod, and the female joint is arranged on one side of the slanting mouth drill bit and is used for being connected with an external drill rod.
[0016] The male joint is arranged on the other side of the internal drill rod and is used for being connected with an external core tube.
[0017] Further, a storage inner groove is arranged between the internal drill rod and the straight pipe outer wall.
[0018] The storage inner groove is a space region between the straight pipe outer wall and the internal drill rod and is used for accommodating the core cuttings or the slag.
[0019] Further, the angle of the slanting mouth of the slanting mouth drill bit is 30°-60°.
[0020] Further, the slanting mouth drill bit is welded with the straight pipe outer wall, and the cutting edge is arranged on the slanting mouth drill bit.
[0021] Further, the straight pipe outer wall is arc-shaped near the male joint, and is welded or integrally formed with the interface of the built-in drill rod and the male joint.
[0022] Further, the straight pipe outer wall is linear near the male joint, and is connected with the external core tube.
[0023] The fixed connecting plate is arranged inside the straight pipe outer wall, and forms a storage inner groove between the fixed connecting plate, the angle drill bit and the built-in drill rod.
[0024] Further, the cutting edge of the angle drill bit is made of a composite sheet or diamond.
[0025] Further, the straight pipe outer wall, the built-in drill rod, the female joint and the male joint are made of steel casting or cutting forming.
[0026] Further, the fixed connecting plate is made of steel casting and integrally formed with the straight pipe outer wall and the built-in drill rod.
[0027] Compared with the prior art, the utility model has the beneficial effects that:
[0028] When the utility model is used in field drilling, when special strata such as broken rock strata, sand strata and soft soil strata are encountered, because an anti-stuck angle drill bit and a storage inner groove are added between the original drill rod and the core tube, the anti-stuck angle drill bit can store cuttings and sand, and when the upper part is stuck by a large rock block, the anti-stuck angle drill bit can be used to drill upward, so that the rock block or the soil on the side wall is cut and broken, the phenomenon of drill sticking and burying is prevented, the engineering loss caused by drill sticking and burying is reduced, the drilling construction cost is saved, and the utility model can be popularized and applied in the field of engineering drilling.
[0029] Meanwhile, the utility model has the advantages of simple structure, easy implementation, low cost, easy operation and high application prospect.
[0030] The utility model will be further described in detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0031] Figure 1 It is a schematic view of the anti-stuck angle drill bit and the slag holding device of the embodiment 1 of the utility model.
[0032] Figure 2 It is a schematic view of the anti-stuck angle drill bit and the slag holding device of the embodiment 2 of the utility model. EMBODIMENT
[0033] It is easy to understand that, according to the technical scheme of the utility model, under the condition of not changing the essential spirit of the utility model, the general skilled person in the art can imagine various implementation manners of the utility model. Therefore, the following specific embodiments and drawings are only exemplary description of the technical scheme of the utility model, and should not be regarded as the whole of the utility model or as the limitation or restriction of the technical scheme of the utility model. On the contrary, the purpose of providing these embodiments is to make the skilled person in the art understand the utility model more thoroughly. The preferred embodiments of the utility model are described in detail below in combination with the drawings, wherein the drawings form part of the application and are used together with the embodiments of the utility model to explain the innovative concept of the application.
[0034] Embodiment 1
[0035] In combination Figure 1 A drill-stuck-preventing angle bit and slag containing device, comprising an angle bit 1, a straight pipe outer wall 2, a female joint 4, and a male joint 5.
[0036] The angle bit 1 is arranged on the straight pipe outer wall 2 and is fixedly connected with the straight pipe outer wall 2.
[0037] An inner drill rod 9 is arranged in the straight pipe outer wall 2, and the female joint 4 is arranged on one side of the angle bit 1 for connecting with an external drill rod.
[0038] The male joint 5 is arranged on the other side of the inner drill rod 9 for connecting with an external core tube.
[0039] A storage inner groove 3 is arranged between the inner drill rod 9 and the straight pipe outer wall 2.
[0040] The storage inner groove 3 is a space region between the straight pipe outer wall 2 and the inner drill rod 9, and is used for accommodating core fragments or slag fragments.
[0041] The angle of the angle bit 1 is arranged to be 30°-60°.
[0042] The angle bit 1 is welded with the straight pipe outer wall 2, and a cutting edge is arranged on the angle bit 1.
[0043] The side of the straight pipe outer wall 2 close to the male joint 5 is arc-shaped, and is welded or integrally formed with the interface of the inner drill rod 9 and the male joint 5.
[0044] The cutting edge of the angle bit 1 is made of a composite sheet or diamond.
[0045] The straight pipe outer wall 2, the inner drill rod 9, the female joint 4, and the male joint 5 are made of steel casting or cutting forming.
[0046] Embodiment 2
[0047] In combination Figure 2The utility model relates to a kind of anti-stuck drill angle drill and slag device, including angle drill 1, straight pipe outer wall 2, female joint 4, male joint 5;
[0048] The angle drill 1 is arranged on the straight pipe outer wall 2 and is fixedly connected with the straight pipe outer wall 2.
[0049] The built-in drill rod 9 is arranged in the straight pipe outer wall 2, and the female joint 4 is arranged on one side of the angle drill 1 for connecting with the external drill rod.
[0050] The male joint 5 is arranged on the other side of the built-in drill rod 9 for connecting with the external core tube.
[0051] The storage inner groove 3 is arranged between the built-in drill rod 9 and the straight pipe outer wall 2.
[0052] The storage inner groove 3 is the space region between the straight pipe outer wall 2 and the built-in drill rod 9, and is used for accommodating the core fragments or slag.
[0053] The angle of the angle drill 1 is arranged to be 30°-60°.
[0054] The angle drill 1 is welded with the straight pipe outer wall 2, and the cutting edge is arranged on the angle drill 1.
[0055] In the embodiment, the straight pipe outer wall 2 is linear near the male joint 5, and is connected with the external core tube, which is different from the embodiment 1.
[0056] The fixed connecting plate 6 is arranged in the straight pipe outer wall 2, and the storage inner groove 3 is formed between the fixed connecting plate 6, the angle drill 1 and the built-in drill rod 9.
[0057] The cutting edge of the angle drill 1 is made of composite sheet or diamond.
[0058] The straight pipe outer wall 2, the built-in drill rod 9, the female joint 4 and the male joint 5 are made of steel casting or cutting forming.
[0059] The fixed connecting plate 6 is made of steel casting and is integrally formed with the straight pipe outer wall 2 and the built-in drill rod 9.
[0060] In the implementation of the scheme, first, the male joint 5 in the device is connected with the female joint of the core tube.
[0061] The threaded part of the male joint 5 in the device is aligned with the internal thread of the female joint of the core tube, and the male joint 5 is slowly and smoothly rotated in the clockwise direction, and is gradually tightened until it is difficult to rotate by hand.
[0062] The male joint of the drill pipe is connected with the female joint 4 in the device, and the female joint 4 is first visually inspected to remove possible dust, sand and other impurities, thereby ensuring the accuracy of the connection.
[0063] The external thread of the drill pipe male joint is aligned with the internal thread end of the female joint 4, and the drill pipe is gently rotated to continuously apply uniform force in the clockwise direction, and attention is paid to the fit of the two. When a significant resistance is felt and there is no longer a play gap between the joints, it indicates that the female joint 4 and the male joint of the drill pipe have been successfully tightened and connected; the device connection is complete.
[0064] The device also has an upward drilling function. When the upper part is blocked by large-diameter rock fragments, the upward drilling function of the beveled drill bit 1 can be used to cut and crush the fallen rock fragments or soil, thereby preventing the occurrence of drill pipe sticking and drill pipe burying. At the same time, the device has a storage function. When debris or fragments fall on the sidewall of the drill hole, they can be stored in the storage inner groove 3, effectively reducing the possibility of drill pipe sticking caused by fragments falling on the top of the core tube or the sidewall.
[0065] The device of the present scheme is simple to process and can be reused, and is quick to install on site. The male and female joints at the upper and lower ends are connected to the core tube and the drill pipe, respectively. The operation process is consistent with the normal up and down drill pipe operation process, which is simple and easy to operate, and drillers generally do not need additional training to use it.
[0066] The above examples show and describe the basic principles and main features of the present application. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements fall within the scope of the claimed application.
Claims
1. A beveled drill bit and slag collection device for preventing drill bit jamming, characterized in that, The utility model relates to a drill bit, which comprises a straight pipe outer wall (2), a female joint (4), a male joint (5) and a bevel bit (1). The bevel bit (1) is arranged on the straight pipe outer wall (2) and is fixedly connected with the straight pipe outer wall (2). The straight pipe outer wall (2) is internally provided with an inner drill rod (9), the female joint (4) is arranged on one side of the bevel bit (1) and is used for being connected with an external drill rod. The male joint (5) is arranged on the other side of the inner drill rod (9) and is used for being connected with an external core tube.
2. The drag-reducing, milled-tooth bit and cuttings containment assembly of claim 1, wherein, The inner drill rod (9) and the straight pipe outer wall (2) are provided with a storage inner groove (3). The storage inner groove (3) is a space region between the straight pipe outer wall (2) and the inner drill rod (9) and is used for accommodating core fragments or slag.
3. The drag-reducing, milled-tooth bit and cuttings containment system of claim 1, wherein, The angle of the bevel bit (1) is 30-60 degrees.
4. The drag-reducing, milled-tooth bit and cuttings containment system of claim 1, wherein, The bevel bit (1) is welded with the straight pipe outer wall (2), and a cutting edge is arranged on the bevel bit (1).
5. The drag-reducing, milled-tooth bit and cuttings containment system of claim 2, wherein, The side of the straight pipe outer wall (2) close to the male joint (5) is arc-shaped and is welded or integrally formed with the interface of the inner drill rod (9) and the male joint (5).
6. The drag-reducing, milled-tooth bit and cuttings containment system of claim 2, wherein, The side of the straight pipe outer wall (2) close to the male joint (5) is linear and is connected with the external core tube. The straight pipe outer wall (2) is internally provided with a fixed connecting plate (6), the fixed connecting plate (6) forms the storage inner groove (3) with the bevel bit (1) and the inner drill rod (9).
7. The drag-reducing, milled-tooth bit and cuttings containment system of claim 4, wherein, The cutting edge of the bevel bit (1) is made of a composite sheet or diamond.
8. The drag-reducing milled-tooth bit and cuttings packer assembly of claim 1, wherein, The straight pipe outer wall (2), the inner drill rod (9), the female joint (4) and the male joint (5) are made of steel and are cast or cut into a shape.
9. The drag-reducing milled-tooth bit and cuttings packer assembly of claim 6, wherein, The fixed connecting plate (6) is made of steel and is integrally formed with the straight pipe outer wall (2) and the inner drill rod (9).