KR20140009950A - Apparatus for hole drilling using prd(percussion rotary drill) method - Google Patents

Abstract

The present invention relates to an apparatus for hole drilling using a PRD method used in the normal hole drilling in less than 1000Φ comprising: external casing included in a large sized hole drilling position in more than 2000Φ; internal casing included inside the external casing; first connection units included between the external casing and the internal casing by combining with the internal casing; a guide unit including space units formed between the external and the internal casing through the first connection unit; an air hammer which is rotated; a bit included under the air hammer; and a hole drilling unit for the PRD method including the casing included in the circumference of the air hammer. The hole drilling unit for the PRD method has the opposite direction with the rotation direction of the air hammers. The air hammer is connected to a hook and an end of a crane including a boom which is sloped by a main body with a predetermined angle. A space unit is formed as an insertion size related to the hole drilling unit for the PRD method. The hole drilling unit for the PRD method successively makes holes along with an inner partition of the external casing to effectively and rapidly execute a large hole drilling process.

Description

Perforation apparatus using PADI method {APPARATUS FOR HOLE DRILLING USING PRD (PERCUSSION ROTARY DRILL) METHOD}

The present invention relates to a drilling device, and more particularly to a small diameter and a large diameter drilling device using the PRD method.

Work to prevent soil from falling down or ground collapse when carrying out various works such as digging underground, constructing water in the river or sea, and expanding roads to construct buildings or construct structures. Down hole work is generally preceded for this.

The drilling methods used for drilling work include Percussion Rotary Drill (PRD) and Reverse Circulation Drill (RCD). The PRD method is a method used for general drilling, and is used when the diameter of steel pipe is about 1,000 ~ 2,000Φ. The diameter of steel pipes used is less than 1,000Φ. The device used in the PRD method is composed of an air hammer (bit) and a bit (bit), and the punching operation is performed by performing the blow and rotation at the same time.

In this case, the conventional PRD method punches and rotates the entire inside of the steel pipe at once, and has a single air hammer structure adopting a single bit. Generally, the bit size is 500Φ. Therefore, when performing the drilling of a small diameter of about 1,000 ~ 2,000Φ, due to the small bit size, the drilling time is delayed because the drilling must be performed several times, thereby, there is a problem that the construction period is delayed.

On the other hand, the RCD method, that is, the polishing method is used when the steel pipe diameter is large diameter. In the polishing method, the drilling operation is performed by grinding through the rotation of the bit without hitting the air hammer. That is, since the drilling operation is performed only by the rotation of the bit, compared to the PRD method, the speed is significantly lowered, which causes a problem in delaying the construction period. And special bit and large equipment should be used, and separate air compressor should be provided only to remove the excavated soil, and the cost of expensive equipment due to the problem that the excavated soil is not smoothly removed due to the slow circulation speed There is also a problem that is significantly higher. Here, there is a problem in that the remnants are always left in the parts to be drilled, because the grinding is performed.

In addition, in order to drill a large diameter, a sufficient load must be supplied to the bit in proportion to the diameter, and in this case, it is not only expensive to manufacture a drill collar for supplying sufficient load, but also a large bit requires a large rotational force. There is also the problem of using large equipment.

Here, when the above-mentioned PRD method is applied in large diameter drilling, the size of the equipment, for example, the air hammer and the bit, must be increased according to the size of the steel pipe. However, there is a technical difficulty in increasing the size of a device having a single air hammer structure, so that the PRD method is not applied for large diameter drilling.

The present invention has been proposed to solve the above problems, and an object thereof is to provide a puncturing apparatus using a PRD method that can be applied to small diameter and large diameter drilling.

Another object of the present invention is to provide a puncturing apparatus using a PRD method, which can reduce time and cost when puncturing small and large diameters.

Still another object of the present invention is to provide a punching device using the PRD method, which can quickly and easily perform a large diameter drilling using a punching machine for the PRD method.

It is still another object of the present invention to provide a punching device using the PRD method, which can be made quickly, since there is almost no part where the punch is not performed by the PRD punching machine sequentially drilling along the inner wall surface of the outer casing. To provide.

Perforation device using a percussion rotary drill (PRD) method used in the general drilling of 1,000 Φ or less according to the present invention for achieving the above object, the outer casing of a punch size or more provided in a large diameter drilling position of 2,000 Φ or more, the An inner casing provided inside the outer casing, a plurality of first connecting parts coupled to the inner casing and provided between the outer casings, and a plurality of spaces formed between the outer and inner casings through the first connecting parts. A guide section; And a perforation part for a PRD method including an air hammer rotated and struck, a bit provided under the air hammer, and a casing provided around the air hammer, wherein the perforation part for the PRD method A plurality of pairs are provided in pairs and the rotation directions of the air hammers are opposite to each other, and the air hammer is connected to the boom end of the crane having a boom that is inclined at a predetermined angle with the main body through a hook and a hook. The space portion is characterized in that it is formed in a size that is inserted into the perforated portion for the paired PRD method.

And the drilling device using the PRD method according to the present invention is connected to the boom end of the crane provided with a boom (boom) which can be inclined at a predetermined angle through the hook and hook to the free fall of the chain arm (碎 巖) And further comprising a rod, wherein the PRD drilling hole drills the space along the inner casing inner wall of the guide part in order to move the space, and then drills the inner casing through the PRD drilling hole. Perforate by freely dropping the chain arm rod several times, or perforate by freely dropping the chain arm rod several times throughout the inner casing, drawing the inner casing and the first connection part, and perforating between the outer and inner casings. It is characterized by press-fitting steel pipe in the part which was made.

In addition, the punching portion for the PRD method of the drilling device using the PRD method according to the present invention, the first punching portion including a first air hammer, a first bit, the first casing, a second air hammer, a second bit, A second perforation part including two casings, further comprising a second connection part connecting the first and second casings to integrate the first and second perforations, wherein eight space parts are formed; It is characterized by

On the other hand, the punching device using the PRD method used in the general drilling of 1,000Φ or less according to the present invention for achieving the above object, the steel pipe is pressed into a small diameter punching position of 1,000Φ or less; First and second air hammers that are rotated and driven, first and second bits provided below each air hammer, first and second casings provided around the respective air hammers, and the first and second casings. And a PRD drilling method including a pair of first and second drilling parts, each of which comprises a second connection part configured to connect the rotation direction of the first and second air hammers, including the air hammer. They are connected to the boom end of the crane having a boom which can be tilted at a predetermined angle with the main body through a hook and hook, the inner diameter of the steel pipe is characterized in that it corresponds to the entire inner diameter of the perforation for the PRD method.

And a punching device using the PRD method according to the present invention, after pressing the steel pipe, and punched the inside of the steel pipe with the hole for the PRD method inserted in the first direction, the second perpendicular to the first direction Perforations for the PRD method inserted in the direction is characterized in that for drilling the remaining portion inside the steel pipe.

According to the present invention, when a large diameter drilling is performed, the PRD perforator is sequentially drilled along the inner wall surface of the outer casing, so that there is almost no portion where the perforation is not performed.

In addition, by applying the PRD method used for general apertures to large diameters, it is possible to reduce time and cost when drilling large diameters. That is, the RCD method, which is used for large diameter drilling, that is, the construction period delay and high cost problem due to the polishing method can be solved, and when the PRD method is applied to the large diameter drilling, there is an effect of solving the problem of technical difficulties.

In addition, when drilling a small diameter, by using a PRD drilling method of the size corresponding to the size of the inner diameter of the steel pipe, there is an effect that can be easily made inside the steel pipe by only two drilling processes.

In addition, since the remnants due to the perforations are ejected by the air during the perforation by the PRD method, the problem of the perforation delay due to the remnants can be solved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

1A and 1B are a perspective view and a cross-sectional view showing a guide part of a large-diameter drilling apparatus using the PRD method according to the first embodiment of the present invention.
2A and 2B are a perspective view and a cross-sectional view showing a perforation part of a perforation device using a PRD method according to the present invention.
3 is a view showing a large-diameter drilling apparatus using the PRD method according to the first embodiment of the present invention.
4A to 4C are diagrams showing a drilling method using a large-diameter drilling apparatus using the PRD method according to the first embodiment of the present invention.
5 is a perspective view showing a chain arm rod of a large-diameter drilling apparatus using the PRD method according to the first embodiment of the present invention.
6A to 6C are views illustrating another example of a drilling method using a large-diameter drilling apparatus using the PRD method according to the first embodiment of the present invention.
7 is a view showing a small-diameter drilling apparatus using the PRD method according to a second embodiment of the present invention.
8A to 8C are diagrams showing a drilling method using a small-diameter drilling apparatus using a PRD method according to a second embodiment of the present invention.

Hereinafter, a puncturing apparatus using a PRD method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1st Example

First, a large-diameter drilling apparatus using the PRD method according to the present invention will be described. As mentioned above, a large diameter is a case where a steel pipe diameter is 2,000 Φ or more.

1A and 1B are a perspective view and a cross-sectional view showing a guide portion of a large-diameter drilling device using the PRD method according to the present invention, Figures 2a and 2b are a perspective view and a cross-sectional view showing a drilling portion of a drilling device using a PRD method according to the present invention 3 is a view showing a large-diameter drilling device using the PRD method according to the present invention.

1 to 3, the large-diameter drilling apparatus 100 using the PRD method according to the present invention includes a guide part 10 and a punching part 20 for a PRD method.

The guide part 10 includes an outer casing 11, an inner casing 13, a first connection part 15, and a space part 16, as shown in FIGS. 1A and 1B.

The outer casing 11 is inserted in the puncturing position and prepared above the puncturing size. Since the drilling device 100 according to the present embodiment is for a large diameter, the size of the outer casing 11 is a size corresponding to the large diameter drilling size. For example, the size of the outer casing 11 is 2,000 Φ or more.

The inner casing 13 is provided inside the outer casing 11. The size of the inner casing 13 is provided such that the linear distance between the inner wall of the outer casing 11 and the outer wall of the inner casing 13 is equal to the diameter of the bit 22 to be described below. The first connection part 15 is provided between the outer casing 11 and the inner casing 13, and is welded and coupled to the inner casing 13. Eight first connecting units 15 may be provided.

The space portions 16 are formed by the first connecting portion 15 between the outer casing 11 and the inner casing 13, and eight are formed. Each of the spaces 16 may be fitted with a pair of perforations 20 for the PRD method described below. In the present embodiment, the connection part 15 and the space part 16 are described using eight as an example.

The perforation section 20 for the PRD method includes an air hammer 21, a bit 22, and a casing 23, as shown in FIGS. 2A and 2B.

The air hammer 21 is rotated and driven. The bit 22 is provided below the air hammer 21, and rotates and drives according to the driving of the air hammer 21. The casing 23 is provided around the air hammer 21.

As shown in FIG. 2A and FIG. 2B, the PRD drilling holes 20 may include a plurality of holes, for example, two drilling parts 20a and 20b. The first drilling portion 20a is composed of a first air hammer 21a, a first bit 22a, and a first casing 23a, and the second drilling portion 20b includes a second air hammer 21b, It consists of the 2nd bit 22b and the 2nd casing 23b. The rotation direction of the 1st air hammer 21a and the 2nd air hammer 21b is opposite. That is, as shown in Fig. 5A, the first and second air hammers 21a and 21b are rotated in opposite directions so as to face each other outward. Because of this, the perforation can be made easily.

The first and second perforations 20a and 20b are connected to the second connecting portion 25, and the first and second perforations 20a and 20b may be integrally used by the second connecting portion 25. The size of the PRD punching unit 20 is made of one size, it can be used in a variety of large diameter drilling by being composed of a plurality of punching. In the present embodiment, a description is given taking two perforations as an example, but the present invention is not limited thereto. That is, as the size of the perforation increases, a plurality of perforations may be prepared so as to correspond to the size of the perforations, and these may be connected and used as connection parts. For example, as shown in FIG. 2C, four perforations may be used in pairs.

The perforation section 20 for the PRD method is connected to the crane 30, as shown in FIG. The crane 30 has a boom 35 which can be inclined at a predetermined angle with the main body, and the air hammer 21 is connected to the end of the boom 35 through a hook and a hook. By the crane 30 with the boom 35, the drilling is easy to the terrain difficult to enter the equipment. In the conventional equipment, although the lid was required to allow the auger motor to move up and down without being rotated, in the present embodiment, the fabric for the PRD method is applied to the space 16 between the outer and inner casings 11 and 13 without the lid. Since the study 20 is inserted, the auger motor itself is easily twisted or rotated without the effect.

Hereinafter, a large diameter drilling method using the drilling device 100 using the PRD method according to the present embodiment will be described. 4A to 4C are diagrams showing a drilling method using a large-diameter drilling apparatus using the PRD method according to the present invention.

4A to 4C, the hole 16 for the PRD method is drilled along the inner wall of the outer casing 11 of the guide unit 10. That is, as shown in FIG. 4A, the PRD drilling method 20 is inserted into the first space of the eight spaces of the outer casing 11 formed by the first connection part 15 to perform the drilling. Then, the drilling is performed by sequentially inserting the punching part 20 for the PRD method from the second space to the eighth space. Here, the drilling portion 20 is connected to the end of the boom 35 through the hook and hook, it is easy to move.

On the other hand, as another example of the drilling device 100 using the PRD method according to the present embodiment described above, the drilling device 100 using the PRD method may further include a chain rock rod (40). Figure 5 is a perspective view showing a chain rock rod in the large diameter drilling method using the PRD method according to the present invention.

Chain rod 40 is in the form as shown in FIG. The chain arm rod 40 is connected to the crane 30. Like the above-described PRD punching section 20, the chain arm rod 40 is connected to the end of the boom 35 of the crane 30 through the hook and hook. The chain arm rod 40 falls free. That is, the chain arm bar 40 is punched through the PRD drilling method 20 for the large diameter in accordance with the present embodiment, and then free-falls to the remaining part to finish the drilling.

The large-diameter drilling method using the drilling device 100 using the PRD method including the chain rock rod 40 will be described. 6A to 6C are views illustrating another example of a drilling method using a large-diameter drilling apparatus using the PRD method according to the first embodiment of the present invention.

As shown in FIGS. 5A to 5C, after drilling the hole 20 for the PRD method along the inner wall 11 of the outer casing 11 of the guide unit 10, FIG. 6A is shown. As shown in the figure, the inner casing 13 is drilled using the punching unit 20 for the PRD method. FIG. 6A illustrates a punching operation of the PRD drilling method 20 into the lower portion of the inner casing 13, and then the punching operation of the PRD drilling method 20 is performed on the upper portion thereof. Subsequently, as shown in FIG. 6B, the hole is drilled through the hole 20 for the PRD method and the remaining portion is freely dropped by the chain arm rod 40 several times.

On the other hand, after the process shown in Figure 4c, and not the process of Figures 6a and 6b, as shown in Figure 6c, as shown in Figure 6c, the inner casing 13 can only be drilled with the chain arm rod 40 only It may be. That is, after performing the perforation of the space 16 of the outer casing 11 through the process up to Figure 4c, the perforation inside the inner casing 13 free fall the chain arm rod 40 several times to perform the perforation You may.

6B or 6C described above, since the space 16 of the outer casing 11 is already perforated, the ground inside the inner casing 13 is weakened. Therefore, the perforation can be easily made inside the inner casing 13 by freely dropping the chain arm rod 40.

Second Example

The punching device using the PRD method according to the present embodiment is similar to the invention according to the first embodiment described above, but is characterized in that it is applied to small diameter drilling. In the present embodiment, description of portions similar or identical to those of the first embodiment will be omitted. A small diameter is a general steel pipe diameter, when the steel pipe diameter is 1,000 Φ or less.

Figure 2a and Figure 2b is a perspective view and a cross-sectional view showing a perforation of the drilling device using the PRD method according to the present invention, Figure 7 is a view showing a small diameter drilling device using a PRD method according to a second embodiment of the present invention. .

First, the punching portion 20 for the PRD method for drilling is the same shape as that shown in Figures 2a and 2b of the first embodiment described above. A PRD method punching part 20 composed of a pair of first and second punching parts 20a and 20b is used. In the present embodiment, a description is given taking two perforations as an example, but the present invention is not limited thereto. That is, as the size of the perforation increases, a plurality of perforations may be prepared so as to correspond to the size of the perforations, and these may be connected and used as connection parts.

Referring to FIG. 7, the small-diameter drilling apparatus 200 using the PRD method according to the present embodiment includes a punching unit 20 and a steel pipe 210 for the PRD method.

The steel pipe 210 is pressed into the puncture position and has a small diameter of a puncture size, for example, 1,000 Φ or less. The inner diameter of the steel pipe 210 is a size corresponding to the punching portion 20 for the PRD method. That is, when the inner diameter of the steel pipe 210 is 1,000 Φ, the total inner diameter of the punched portion 20 for the PRD method is 1,000 Φ. That is, the inner diameters of the first bit 22a and the second bit 22b are each 500?. Unlike the outer and inner casings 11 and 13 of the first embodiment described above, the steel pipe 210 according to the present embodiment is press-fitted in advance, and then the inside of the perforated portion 20 for the PRD method is pressed in advance. Punch through.

Hereinafter, a small diameter drilling method will be described using the drilling device 100 using the PRD method according to the present embodiment. 8A to 8C are diagrams showing a drilling method using a small-diameter drilling apparatus using a PRD method according to a second embodiment of the present invention.

First, referring to FIG. 8A, the steel pipe 210 is pressed into a position for drilling.

Thereafter, as shown in FIG. 8B, the drilling part 20 for the PRD method is inserted into the steel pipe 210 to perform the drilling. At this time, the PRD drilling hole 20 is sized to fit inside the steel pipe 210, and as shown in the drawing, the first direction, for example, is inserted in the vertical direction to perform the drilling.

Subsequently, as illustrated in FIG. 8C, the PRD drilling hole 20 is inserted into the steel pipe 210 in the second direction to perform the drilling. That is, as shown in the figure, the perforation is performed by inserting in the horizontal direction perpendicular to the first direction. Because of this, the perforation inside the steel pipe 210 can be easily made.

On the other hand, the drilling device using the PRD method according to the present embodiment is not limited to the above-described form, it can be variously modified within the scope not departing from the technical spirit of the present invention. It will be readily apparent to those skilled in the art to which the present invention pertains.

100; Large Diameter Drilling Machine Using PRD Method
10; Guide portion
11; Outer casing
13; Inner casing
15, 25; Connection
16; Space portion
20; Perforation part for PRD method
21; Air hammer
22; beat
23; Casing
30; crane
35; Boom
40; Seongambong
200; Small-diameter drilling device using PRD method
210; Steel pipe

Claims (2)

In the drilling device using the PRD method used for general drilling of 1,000 Φ or less,
A steel pipe press-fitted into a small diameter punching position of 1,000 Φ or less;
First and second air hammers that are rotated and driven, first and second bits provided below each air hammer, first and second casings provided around the respective air hammers, and the first and second casings. Includes; punch for PRD method comprising a pair of first and second punching portion consisting of a second connecting portion for connecting the;
The rotation direction of the first and second air hammers are opposite, the air hammers are connected to the boom end of the crane having a boom which can be inclined at a predetermined angle with the main body through a hook and hook, the inner diameter of the steel pipe A punching device using the PRD method, characterized in that corresponding to the entire inner diameter of the punching portion for the PRD method. The method according to claim 1,
After press-fitting the steel pipe, the inside of the steel pipe was drilled by the PRD drilling hole inserted in the first direction,
Punching apparatus using a PRD method, characterized in that for puncturing the remaining portion of the inside of the steel pipe with a hole for the PRD method inserted in a second direction perpendicular to the first direction.

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