A high-efficiency detachable hole cleaning device

Abstract

This utility model discloses a high-efficiency, detachable borehole cleaning device, comprising a circular steel pipe with a connecting thread at one end and several steel wire rope groups at the other end. The steel wire rope groups are inserted into the end of the steel pipe in a quincunx pattern, with some extending into the pipe and others exposed. This utility model device disturbs the edge drilling cuttings through the exposed steel wire ropes and holds the cuttings in place by the internal steel wire ropes, ultimately removing them using mud circulation. It is mainly used for efficiently cleaning residual drilling cuttings at the bottom of pile holes, ensuring the construction quality of cast-in-place piles.

Description

Technical Field

[0001] This utility model relates to the field of building construction. More specifically, this utility model relates to a highly efficient, detachable hole cleaning device. Background Technology

[0002] Large-diameter rock-socketed piles are widely used in major engineering projects such as bridges and high-rise buildings due to their advantages such as high bearing capacity and low settlement. These pile foundations are typically constructed using rotary drilling rigs. To improve drilling efficiency, reduce drilling difficulty, and minimize drill bit wear, a "small hole first, then enlarged hole" process is often adopted: first, a small-diameter rotary drill is used to drill to the designed depth to form a pilot hole; then, a large-diameter rotary drill with cutting teeth is used to enlarge the hole, ultimately forming the pile hole of the designed diameter. However, this enlargement process presents a significant technical challenge: during the enlargement process, the medium-sized drill cuttings cut off by the cutting teeth, with a particle size of approximately 5-10 cm, easily accumulate at the bottom edge of the pile hole after settling in the drilling mud, forming a difficult-to-clean drill cuttings deposit zone. This is because the bottom area of ​​large-diameter pile holes is enormous, making it difficult for rotary drilling buckets or slag removal buckets to reach and retrieve drill cuttings from the hole edges when lowered to the center. During subsequent hole cleaning using the mud replacement method, the mud circulation flow is mainly concentrated in the central area of ​​the hole, with minimal disturbance to the fluid at the bottom edge. This results in medium-sized drill cuttings at that location not being effectively carried out by the mud. These residual medium-sized drill cuttings pose a serious threat to pile foundation quality. First, during concrete pouring, the residue leads to excessively thick sediment at the pile bottom, altering the stress state at the pile tip and significantly reducing its bearing capacity. Second, the residue may be incorporated into the concrete, forming interlayer defects that affect the integrity and durability of the pile. Currently, there is a lack of dedicated and efficient solutions to this problem. When using the mud replacement method with steel guide pipes for hole cleaning, due to the large pile diameter, the mud circulation cannot completely remove these medium-sized drill cuttings from the bottom edge, which not only hinders concrete pouring but may also negatively impact pile foundation quality. Therefore, there is an urgent need to develop a specialized device that is highly targeted, efficient, and can effectively remove medium-sized drilling slag from the bottom edge of large-diameter pile holes, in order to ensure the quality of pile foundation construction and improve construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a highly efficient and detachable hole cleaning device that uses an exposed steel wire rope to disturb the edge drill cuttings and an internal steel wire rope to hold the drill cuttings in place, and finally removes them using mud circulation.

[0004] The technical solution adopted by this utility model to solve this technical problem is: a high-efficiency detachable hole cleaning device, including a circular steel pipe, one end of which is provided with a connecting thread, and the other end is provided with a number of steel wire rope groups; the steel wire rope groups are inserted into the end of the steel pipe in a quincunx pattern, with some extending into the pipe and some exposed.

[0005] As a further embodiment of this utility model, the inner diameter of the circular steel pipe is d and the length is h. Within 1 / 3h to 1 / 2h of the end of the circular steel pipe, a group of steel wire ropes is inserted into the steel pipe in a staggered quincunx pattern. The group of steel wire ropes penetrates into the steel pipe by 1 / 5d to 1 / 2d and exposes 1 / 5d to d outside the pipe.

[0006] As a further embodiment of this utility model, the inner diameter of the circular steel pipe is 30cm, the wall thickness is 1cm, and the length is 3m. Within 1.5m of the end of the circular steel pipe, a group of steel wire ropes with a length of 21cm is inserted into the steel pipe in a quincunx pattern with a spacing of 10cm.

[0007] As a further aspect of this utility model, the lengths of the several wire rope groups extending into the pipe are all different.

[0008] As a further embodiment of this utility model, the wire rope assembly is composed of a single wire rope; or, the wire rope assembly is composed of two wire ropes twisted together.

[0009] As a further aspect of this utility model, the diameter of the steel wire rope is 1-3cm.

[0010] As a further embodiment of this utility model, the wire rope is arranged in a wavy pattern on the inner and outer sides of the circular steel pipe.

[0011] As a further embodiment of this utility model, the wire rope is arranged in a linear form on the inner and outer sides of the circular steel pipe.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. The hole cleaning device improves the efficiency of hole cleaning after pile foundation drilling, reduces the hole cleaning time, and lowers construction costs and risks.

[0014] 2. Quick installation and disassembly, reusable: The detachable design allows the device to be reused in different projects, reducing costs.

[0015] 3. Good adaptability: The device should be able to adapt to the hole cleaning requirements under different environments and conditions, such as different pile diameters.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is an elevation view of a high-efficiency detachable hole cleaning device in one embodiment of the present invention;

[0018] Figure 2This is a top view of a high-efficiency detachable hole cleaning device in one embodiment of the present invention;

[0019] Figure 3 This is an elevation view of a wavy wire rope assembly according to another embodiment of the present invention;

[0020] Figure 4 This is an elevation view of a hole-cleaning device according to another embodiment of the present invention;

[0021] Figure 5 This is a physical image of the high-efficiency detachable hole cleaning device of this utility model.

[0022] Among them, 1-steel wire rope assembly, 2-circular steel pipe, 3-connecting thread. Detailed Implementation

[0023] The present invention will now be described in detail and completely with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that the technical solutions and features provided in the various parts of the present invention, including the following description, can be combined with each other without conflict.

[0024] Furthermore, the embodiments of the present invention described below are generally only a part of the embodiments of the present invention, and not all of the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the protection scope of the present invention.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, and the specific implementation process is as follows:

[0026] This utility model provides a highly efficient, detachable hole cleaning device, such as... Figure 1As shown, the device includes a circular steel pipe 2, one end of which is provided with a connecting thread 3. The connecting thread 3 is a standard oil drill pipe thread, which can be quickly and smoothly connected to a conventional hole-cleaning guide pipe. The other end is provided with several wire rope groups 1. The wire ropes in the wire rope groups 1 are made of multiple strands of steel wire twisted together, possessing good flexibility and wear resistance. The wire rope groups 1 are inserted into the end of the steel pipe in a quincunx pattern, with some extending into the pipe and some exposed. Technically, one end of the steel pipe is machined with external threads, and the other end is drilled with multiple mounting holes arranged in a quincunx pattern. There are three ways to install the wire rope groups 1 into the mounting holes: one is to directly thread the wire rope groups 1 through the mounting holes and secure them directly; the second is to fix rubber rings on the mounting holes and secure the wire rope groups 1 through the rubber rings; the third is to directly fix the wire ropes to the mounting holes using epoxy resin sealant. Wear-resistant and anti-corrosion coatings are sprayed onto the inner and outer walls of the wire rope groups 1 and the steel pipe to extend the service life of the entire device.

[0027] In the aforementioned technical solution, the device creatively addresses a specific technical challenge by incorporating an inner and outer extending steel wire rope assembly 1 at the end of the steel pipe. Its exposed portion effectively scrapes and disturbs medium-sized drill cuttings deposited in the dead corners of the borehole as it rotates at the bottom, suspending them in the drilling mud. The inner extending portion forms a highly efficient capture zone, effectively trapping and intercepting the suspended drill cuttings, which are then carried out of the borehole by a lifting device or sucked away by a mud pump. This integrated design of disturbance and capture significantly improves the efficiency and thoroughness of borehole cleaning, fundamentally reducing the thickness of sediment at the pile bottom, and significantly enhancing the bearing capacity and engineering quality of the pile foundation.

[0028] The working process of the device is as follows: The hole cleaning device is connected to the bottom of the hole cleaning guide pipe and secured tightly. Using lifting equipment, the device is continuously rotated along the edge of the hole bottom, causing the external wire rope to disturb the drill cuttings at the bottom of the hole. The disturbed drill cuttings are collected into the circular steel pipe 2 using the suction of the mud pump and the internal wire rope of the device. The device is then lifted out of the hole, and the collected drill cuttings are cleaned. This process is repeated until the drill cuttings at the bottom of the hole are completely cleaned. In a preferred embodiment, during hole cleaning, the internal length of the wire rope assembly 1 on the hole cleaning device can be freely adjusted as needed to clean drill cuttings of different particle sizes. The entire process effectively cleans the hole edge area, which is difficult to handle using traditional hole cleaning methods.

[0029] In another technical solution, the inner diameter of the circular steel pipe 2 is d, and its length is h. A group of steel wire ropes 1, arranged in a staggered pattern at intervals, is inserted into the pipe from 1 / 3h to 1 / 2h of its end. The group of steel wire ropes 1 penetrates 1 / 5d to 1 / 2d into the pipe and protrudes 1 / 5d to d outside the pipe. By establishing a scientific proportional relationship between the core dimensional parameters of the device, such as the effective length, insertion depth, and exposed length, and the inner diameter d and length h of the steel pipe itself, the device achieves good versatility and consistent hole-cleaning effect. This proportional range is the optimal range verified through practice. Within this range, the exposed steel wire ropes ensure sufficient disturbance range and force, the internal steel wire ropes form an effective interception network, and the overall structural strength and service life of the device achieve an optimal balance, making it suitable for hole-cleaning operations of various specifications of pile holes.

[0030] The optimal implementation, designed for 593 pile foundations of an airport highway, features piles with an average length of approximately 38m and diameters mostly between 2m and 2.2m. All piles are rock-socketed. The circular steel pipe 2 has an inner diameter of 30cm, a wall thickness of 1cm, and a length of 3m. Within 1.5m of the end of the circular steel pipe 2, 21cm long steel wire rope groups 1 are inserted into the pipe in a staggered pattern at 10cm intervals. Most of these groups penetrate 10cm into the pipe's inner diameter, with 10cm protruding. Of the remaining groups, some penetrate more than 10cm, while others penetrate less than 10cm. These wire rope groups 1 are arranged in a staggered pattern within the circular steel pipe 2. This parameter set has proven to be the most effective and economical design for cleaning pile foundations with diameters ranging from 2m to 2.2m. All dimensions are clearly defined, facilitating precise material cutting and processing by manufacturers, and enabling quick identification and selection by on-site construction personnel. This reduces design and selection time, promotes the standardization and application of the technology, and ensures stable and reliable hole-cleaning performance under these working conditions. Figure 5 As shown, this device successfully and effectively captures sediment from the bottom of the pile into the circular steel pipe 2. This specific embodiment has achieved significant results in actual engineering projects. Application in highway bridge projects shows that the hole cleaning efficiency has increased by more than 50%, and the average operation time has been shortened by 1.5 hours. Due to standardized parameters, production costs have been reduced by 30%, and it has become one of the standard processes in the region.

[0031] In another technical solution, such as Figure 2 As shown, several groups of wire ropes 1 extend into the pipe for different lengths, thus forming a stepped shape in the pipe inlet area. When the device rotates at the bottom of the hole, the oscillation amplitude and natural frequency of the wire ropes with different extension lengths also vary. Preferably, as shown... Figure 4As shown, the longer internal steel wire rope extends deeper into the center of the flow field, enabling it to intercept and trap drill cuttings that are disturbed earlier; the shorter internal steel wire rope is closer to the nozzle and is responsible for capturing drill cuttings that have just been disturbed.

[0032] In another technical solution, two implementations of the wire rope assembly 1 are provided. One is that the wire rope assembly 1 consists of a single wire rope; the other is that the wire rope assembly 1 consists of two wire ropes twisted together. Using a single wire rope to form the assembly offers better flexibility, a larger swing amplitude at the bottom of the hole, and a more intense disturbance effect on drill cuttings, making it suitable for handling loose drill cuttings with weak adhesion. Using two twisted wire ropes to form the assembly significantly improves rigidity, strength, and wear resistance, resulting in a longer service life. Furthermore, its robust shape effectively catches and retrieves larger pieces of drill cuttings, providing users with flexibility to choose according to actual geological conditions.

[0033] In another technical solution, the diameter of the wire rope is 1-3 cm. Wire ropes with diameters within this range possess sufficient mechanical strength and wear resistance, enabling them to withstand repeated scraping operations at the bottom of hard holes, thus avoiding frequent replacements. Simultaneously, this diameter also ensures that the wire rope has good elastic deformation capacity, allowing it to generate an effective whipping effect during operation and enhance the disturbance effect. Conversely, excessively thick wire ropes would be too rigid, reducing the disturbance effect.

[0034] In another technical solution, such as Figure 3 As shown, the wire ropes are arranged in a wavy pattern on the inner and outer sides of the circular steel pipe 2. After installation, the waveform phases of all the wire ropes are staggered, enhancing the turbulence effect. Setting the wire ropes in a wavy shape greatly increases the contact area and frequency between the wire ropes and the drilling mud and cuttings. During the turbulence process, a more chaotic and efficient eddy current field is created, making it easier to stir up the drilling cuttings. Simultaneously, inside the device, the wavy surface can more effectively impede and contain the captured drilling cuttings, reducing the risk of blockage at the inlet, thereby further improving the efficiency and reliability of hole cleaning.

[0035] In another technical solution, the wire ropes are arranged linearly on the inner and outer sides of the circular steel pipe 2. The straight wire ropes facilitate material sourcing, processing, and installation, reducing manufacturing costs. Their quincunx-shaped distribution around the circumference of the steel pipe also creates effective disturbance and interception zones, meeting basic hole-clearing requirements. This solution provides a practical and efficient option for projects that are cost-sensitive or have less demanding operating conditions, ensuring the versatility and economy of this technology.

[0036] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.

Claims

1. A high efficiency de-burring device, comprising: It includes a circular steel pipe with a connecting thread at one end and several steel wire rope groups at the other end; the steel wire rope groups are inserted into the end of the steel pipe in a quincunx pattern, with some extending into the pipe and some exposed.

2. The high efficiency de-burring device of claim 1, wherein, The circular steel pipe has an inner diameter of d and a length of h. Within 1 / 3h to 1 / 2h of the end of the circular steel pipe, a group of steel wire ropes is inserted into the steel pipe in a staggered quincunx pattern. The steel wire rope group penetrates into the steel pipe by 1 / 5d to 1 / 2d and is exposed by 1 / 5d to d.

3. The high efficiency de-burring device of claim 1, wherein, The circular steel pipe has an inner diameter of 30cm, a wall thickness of 1cm, and a length of 3m. Within 1.5m of the end of the circular steel pipe, a group of 21cm long steel wire ropes are inserted into the steel pipe in a quincunx pattern with 10cm intervals.

4. The high efficiency de-burring device of claim 1, wherein, The lengths of the various wire rope groups extending into the pipe are all different.

5. The high efficient and detachable hole cleaning device according to any one of claims 1-4, characterized in that, The wire rope assembly consists of a single wire rope; or, the wire rope assembly consists of two wire ropes twisted together.

6. The high efficiency de-burring device of claim 5, wherein, The diameter of the steel wire rope is 1-3cm.

7. The high efficiency de-burring device of claim 5, wherein, The steel wire rope is arranged in a wavy pattern on the inside and outside of the circular steel pipe.

8. The high efficiency de-burring device of claim 5, wherein, The steel wire rope is arranged in a linear form on the inner and outer sides of the circular steel pipe.

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