WO2015026146A1 - Drill bit to directly discharge excavated slime above ground and method of using same - Google Patents

Abstract

The present invention relates to a drill bit for ground excavation that is configured to use a liquid supplied from the outside in order to discharge excavated slime to the outside of the bored hole. The drill bit (2) includes an upwardly discharging passage (14) that changes the direction of flow of a downwardly supplied fluid for discharging slime to an upward direction so as to be discharged. Slime on the sides of drill bits (2), (2a), and (2b) and a drill rod is quickly removed so that friction against the walls of a bored hole during rotation is reduced in order to improve drilling speed. The supporting ability of a structure is improved because there is no residual slime left on the floor of a bored hole, and slime deposited on a drill rod or a screw (8) attached to the drill rod is mostly removed so that there is almost no slime to be shaken off above ground, thereby reducing civil complaints due to falling rocks and scattering dust.

Description

Drill bit for discharging excavation slime straight to the ground and its use

The present invention relates to a drill bit for ground excavation, and to handle the slime generated during the drilling work in the construction foundation work piles or slopes anchors, horizontal drilling for small tunnels, ground drilling work for groundwater or geothermal and resource development The present invention relates to a drill bit for allowing clean discharge of slime in a drilling hole by using a fluid provided from the ground.

In general, when digging ground using a drill bit for drilling a ground, the slime discharge fluid provided to the drill bit through the upper drill rod flows strongly downward through the drill bit core to the bottom of the drill bit, and then drills the drill bit. Is returned from the bottom of the drilled hole is located, and then goes up to the ground through the drill bit outside and is discharged to the outside. Due to this strong fluid flow, the slime generated during the excavation work is also discharged to the ground by the vertical fluid discharge path formed on the outside of the drill bit or the ascending fluid through the screw.

This general drill bit is useful for slime removal on the bottom of the drilled hole, but is disadvantageous for slime removal on the drill bit side or drill rod section.

This is because the flow is greatly weakened by the resistance of the bottom of the drilled hole and the amount of fluid lost to the gap in the ground during the downward flow of the fluid. If the slime that is not discharged in the hole is increased, the friction between the drill bit and the drill rod and the inner wall of the hole or casing increases, so that the drilling speed is slowed and the wear of the drill rod is severe. In the case of using a screw rod, it is difficult to remove the slime on the screw due to the weakened fluid pressure, and when the drill rod is recovered high to the ground, the slime of the screw is shaken off, and dust and stone fly away to cause various complaints. .

Particularly important is that the slime of the drill rod falls due to the weakened upward fluid pressure during the recovery of the drill bit.When the pile or the structure enters the drilling hole due to the residual slime accumulated on the bottom of the drilling hole, long-term settlement occurs after completion of the construction of the structure. As a result, there was a problem of harming the safety of the structure.

Therefore, the object of the present invention is to direct the drill bit section and the drill rod section with strong and concentrated fluid pressure without loss by directing part or all of the slime discharge fluid to the ground direction directly from the drill bit without spraying the bottom surface of the drilling hole. Most of the slime is to provide a drill bit for direct discharge to the ground and its use.

Another object of the present invention is that after the drilling operation is completed, the upward injection exit also goes up during the recovery of the drill bit to the ground, so that the remaining slime remaining on the bottom surface of the drilling hole is prevented by falling of the floating slime in the drilling hole with a strong fluid pressure without loss. To provide a drill bit and a method of using the same to minimize the.

The present invention according to the above object, in the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside, the flow of the slime discharge fluid supplied downward to the drill bit (2) It is a drill bit for directly discharging the excavation slime to the ground characterized in that the upward injection passage 14 to change the direction to be sprayed.

According to another aspect of the present invention, in the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside, the flow direction of the fluid for slime discharged supplied downward to the drill bit (2a) To the upward injection passage (14a) to be injected by changing the upward, and the fluid supply passage (6) is opened and closed by the slider 24 installed in the drill bit (2a) to operate by lifting the fitting type, the fluid is upward It is a drill bit for directly discharging the excavation slime to the ground characterized in that configured to be injected upward through the injection passage (14a).

According to another aspect of the present invention, in the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole using a fluid supplied from the outside, the drill bit (2b) (2c) of the slime discharge fluid supplied downward Upward injection passages (14a) and (14b) are formed to change the flow direction upward to be sprayed, and the upward injection passages (14a) and (14b) transmit the rotational force provided from the perforator on the ground to the drill bits (2b) and (2c). It is a drill bit for discharging the excavation slime immediately to the ground, characterized in that configured to be opened and closed by the drive sub 42 to move up and down to prevent falling of the drill bit (2b) (2c) while transmitting.

In addition, the present invention, in the method of using the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside, the slime discharge fluid supplied downward to the drill bit (2) fluid supply It is characterized in that the excavation slime of the drill bit 2 and the drill rod section is removed by directly spraying by changing the flow direction upward through the upward injection passage 14 by the opening and closing control of the passage 6.

In addition, the present invention, in the method of using the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside, the fluid supply passage 6 by the lifting operation of the drive sub 42 The flow of fluid is directly injected upward through the upward injection passage 14a to control the opening and closing of the drill bit 2b and the excavation slicing of the drill rod section, but the upward injection by the lifting operation of the drive sub-42 When the passage 14a is opened and closed and the drive sub 42 is lifted up to a predetermined height during the drilling operation, all of the supplied fluid is sprayed downward through the discharge port 18 to remove the residual slime at the bottom of the drilling hole. When the sub 42 is lifted above the set height, the slider 24 descends to block the flow of the fluid to the discharge port 18 so that the fluid flows upward through the upward injection passage 14a. The injection is characterized in that the floating slime of the drill bit (2b) outside and the drill rod section is discharged to the ground.

In addition, the present invention, in the method of using the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside, the fluid supply passage 6 by the lifting operation of the drive sub 42 By controlling the opening and closing of the drill flow (14a, 14b) through the flow of the fluid to be injected directly upwards to remove the drill bit (2b) (2c) and the drilling slit of the drill rod section, but the drill bit (2b) ( 2c) the up and down injection path 14a, 14b is opened and closed by the continuous lowering by excavation and the separation distance generated by the stepping down of the drive sub 42 by the operation of the operator, the drill bit (2b) If the separation distance between 2c and the drive sub 42 is less than or equal to the set value, the supplied fluid is sprayed downward through the discharge port 18 to remove the bottom slime of the drilling hole, and if it is greater than or equal to the set value, the upward spray passage 14a and 14b. As the fluid opens up) It is characterized in that it is injected into the discharge slime in the drilling hole to the outside.

According to the present invention, the slime of the drill bit and the side of the drill rod is quickly removed and the drilling speed is improved by reducing the friction force with the wall of the hole when rotating, and the slime placed on the screw attached to the drill rod or the drill rod is mostly removed. There is little slime to shake off, reducing complaints from falling rocks and scattering dust.

In addition, the fall of floating slime is prevented and the bottom surface close to the ground can be secured with little residual slime remaining on the bottom of the drilled hole, thereby improving the bearing capacity during the pile or anchor construction.

1 is a perspective configuration diagram of a drill bit according to an embodiment of the present invention;

Figure 2 is a partial cross-sectional view showing the configuration of the connection passage in which the fluid is branched in the drill bit of the present invention,

3 is a cross-sectional configuration of FIG.

4 is an operation diagram for adjusting the injection fluid amount of the upward injection passage by the opening and closing control unit,

5 is a perspective configuration diagram of a drill bit according to another embodiment of the present invention;

6 is a cross-sectional view taken along line AA ′ of FIG. 5;

7 is a view showing the opening and closing operation configuration by the shanghaidong of the slider according to the invention,

8 is a cross-sectional view taken along line BB ′ of FIG. 5;

9 is an operation diagram showing a locking structure by the vertical operation of the slider according to the present invention,

10 to 11 is a cross-sectional operation of the hammer-type drill bit according to another embodiment of the present invention,

12 is an operation view showing a configuration for opening and closing the upward injection passage by the drive sub of the hammer type drill bit,

13 is an operation diagram showing a configuration applied to the mubit through the opening and closing configuration of the upward injection passage of the present invention,

14 is an operation diagram showing another embodiment of the mubit through,

15 is a detailed view of the opening and closing operation unit according to the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part includes a certain component, this means that it may further include other components rather than controlling other components unless otherwise stated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The drill bit of the present invention is capable of simultaneously removing the drilling slime accumulated in the drill bit and the drill rod section above the drill bit at the time of the ground drilling by using the fluid supplied from above, and more effectively the drilling slime of the drill rod section By discharging it to increase the drilling speed.

In the description of the present invention, the excavation slime means that the excavation is completed and the remaining slime floating in the drilling hole or placed on the screw of the drill rod section.

1 is a perspective view showing the configuration of a preferred embodiment of the present invention. The drill bit 2 of the present invention shown in FIG. 1 is an auger bit provided with a screw 8, and forms a drill bit joint 4 engaged with a drill rod at an upper end of the drill bit 2, and drill bit ( 2) It is configured to regulate the flow of the fluid supplied from above through the fluid supply passage (6).

In the present invention, compressed air, water, and the like may be used as the fluid supplied to discharge the slime, and preferably, it is effective to supply compressed air at high pressure.

Reference will be made to FIGS. 2 to 3 to describe the configuration of adjusting the fluid flow in the drill bit 2.

2 is a partial cross-sectional view showing a configuration in which the fluid is branched in the drill bit of the present invention, Figure 3 is a cross-sectional configuration of FIG.

The fluid supplied through the fluid supply passage 6 is discharged through the upward injection passage 14 to upwardly inject the flow of the fluid together with the discharge port 18 under the drill bit 2.

Excavation slime generated during drilling by the drill bit 2 is discharged upward with the fluid injected to the bottom of the drilling, but as the slime discharged upward is accumulated on the drill rod and the screw 8 installed on the drill rod. The resistance between the rotating drill rod and the hole in the wall increases, which slows down the drilling operation. Accordingly, it is necessary to change the flow of the fluid injected through the discharge port 18 directly from the drill bit 2 to remove the slime accumulated in the drill rod section by the direct discharge of the strong fluid.

In the present invention, the slime accumulated in the drill rod section by changing the direction of the fluid injected into the discharge port 18 through the fluid supply passage 6 to remove the floating slime in the drilling hole upward direction An upward injection passage 14 for direct discharge is formed in the drill bit 2.

The upward injection passage 14 is formed in communication with the fluid supply passage 6 in the connection passage 30 in the drill bit 2, and directly discharges the flow of the fluid supplied from the upward upward from the drill bit (2) Changes can be made so that the slime attached to the drill rod or accumulated on the screw can be discharged. A plurality of upward injection passage 14 can be formed in the drill bit (2), it is preferable to form two or more in the embodiment of the present invention. Furthermore, it is more effective to install under the drill bit 2 possible.

The upward injection passage 14 of the present invention is formed obliquely upward along the body of the drill bit 2, so that the outlet injection direction of the upward injection passage 14 is directed to the wall of the drilled hole, and thus the drill bit 2 and the drill rod. It is not possible to inject fluid directly on the outside of the screw or around the screw, reducing the upward discharge force.

In the embodiment of the present invention, the injection control member 10 is installed on the outlet side of the upward injection passage 14 to control the angle of the fluid to be injected and to allow the fluid to be directly injected in the vertical direction, injection control By adjusting the member 10 may be configured to change the injection position and the injection direction of the fluid injected through the upward injection passage (14) in real time.

In order to discharge the excavation slime of the drill rod section, it is necessary to prevent the fluid injected upwards from directly hitting the screw in consideration of the arrangement angle and the arrangement interval of the screw 8 installed in the drill rod section. Therefore, in the present invention, it is preferable to install and adjust the installation position and the installation angle of the injection control member 10 to adjust the injection position and the right and left injection angle of the fluid.

The injection control member 10 is installed in a form surrounding the outlet of the upward injection passage 14, so that the direction of the fluid to be injected along the passage formed obliquely upward can be directly injected upward. Moreover, the outlet direction of the injection control member 10 can be rotated to the left and right to adjust the injection angle of the fluid.

In the present invention, it is possible to adjust the amount of fluid injected into the upward injection passage 14 of the fluid supplied through the fluid supply passage (6).

4 is a view showing a configuration for adjusting the amount of fluid injected through the upward injection passage (14).

Referring to this, the drill bit 2 controls the amount of fluid injected into the upward jet passage 14 by adjusting the opening degree of the discharge port 18 through which the fluid supplied through the fluid supply passage 6 is discharged. .

In the embodiment of the present invention is provided with an opening and closing control unit 12 for controlling the opening and closing of the discharge port 18 for injecting the fluid to the bottom of the drilling hole consequently to control the amount of fluid injected into the upward injection passage (14).

In a preferred embodiment of the present invention, the opening and closing adjustment unit 12 is formed in the form of a screw to face through the lower wall of the drill bit (2), the sliding operation in the front and rear by the opening and closing adjustment unit 12 and discharge port ( 18, the linear operation piece 20 for opening and closing is screwed in.

The linear actuating piece 20 screwed into the opening and closing adjustment part 12 operates in the front and rear by tightening and loosening the opening and closing adjustment part 12, and is sprayed through the discharge hole 18 by opening and closing the discharge port 18 step by step. The amount of fluid to be made can be adjusted according to the type of strata of the perforated ground.

For example, it is possible to block the discharge outlet 18 from the start of drilling to the recovery of the drill bit 2 so that the slime discharge fluid is always 100% upwardly sprayed, and 50% from the start of drilling to the number of drills to discharge the outlet 18. Blow slime at the bottom of the drill hole through the remaining 50% can be injected upward.

When the discharge port 18 is completely blocked up from the start of drilling until the number of drill bits 2 is collected so that the slime discharge fluid is always 100% upwardly injected, the upward injection passage 14 for upwardly spraying the fluid is formed on the drill bit 2. It is effective to form at the bottom end.

The ratio of the amount of fluid injected into the bottom of the drilling hole and the amount of fluid directly injected upward is controlled in advance before the drilling operation, or by the drill bit 2 at any time according to the elevation of the drill rod, or by remote control by electrical control from the outside. It is also possible to install a drive such as a motor in the drill bit 2 by steering. In addition, it can also be adjusted by the supplied fluid pressure or externally connected to the pull cord.

At this time, when the drill rod is raised or lowered at any time or remotely controlled from the outside, the ratio of the fluid is injected downward during the drilling operation, and the upward spraying ratio is frequently used when a strong upward injection is required during the recovery of the drill or during the drilling operation. It can be increased, and most of the fluid supplied can be configured to be upward sprayed.

Looking at the configuration for adjusting the amount of fluid injected through the upward injection passage 14 by the opening and closing control unit 12 with reference to Figure 4, the operation shown in Figure 4 is adjusted in advance before the drilling operation from the start of drilling It is operating with a fixed ratio of the fluid injected down and up to the number of bits (2).

In order to recover the drill bit 2 or to discharge the excavation slime accumulated in the screw 8 of the drill rod section upwardly during the drilling operation, the opening / closing adjustment part as shown in FIG. 4 (b) and (c) before drilling. By tightening (12), the straight working piece 20 is pushed into the drill bit 2 core to block the discharge port 18 in a desired ratio, thereby adjusting the upward spraying rate.

The amount of fluid injected into the upward injection passage 14 is adjustable in consideration of the characteristics of the ground to be drilled and the conditions of the fluid supply amount and the supply pressure. In the present invention, 50% or more of the fluid supplied through the fluid supply passage 6 is formed to be injected through the upward injection passage 14, preferably 70% or more to be discharged. Depending on the soil layer, it may be most effective to block all of the discharge holes 18 for injecting the fluid into the bottom surface of the drilling hole so that all of the slime discharge fluid is discharged to the upward injection passage 14.

In addition, some of the fluid supplied through the fluid supply passage (6) is always the flow direction is turned upward through the upward injection passage 14 to be injected, the other part is opened and closed controlled by the opening and closing control unit 12 The fluid to be sprayed upward and the fluid injected to the bottom surface of the drilling hole may be configured to be adjustable.

In the present invention, the ratio of the fluid supplied to the fluid supply passage 6 is injected to the bottom surface of the drilling hole through the discharge port 18 and the ratio of the direct injection by upwardly changing the injection direction by the upward injection passage 14 to the ground layer. It is good to adjust accordingly.

5 to 9 are views showing the configuration of a drill bit according to another embodiment of the present invention, Figure 5 is a perspective configuration diagram showing the overall configuration of another embodiment of the present invention.

Referring to Figure 5, the drill bit (2a) of the present invention is installed a plurality of drilling drill tip 22 to the end of the screw (8) and the slider 24 is installed in the drill bit (2a) operable up and down drill It is inserted and installed in the bit 2a, and a plurality of drill tips 22 are also installed at the end of the slider 24.

On the outer periphery of the drill bit (2a) is formed an upward injection passage 14a for direct injection of the flow of the fluid injected to the bottom surface of the drilling hole upward, which is a drill rod section, is required on the exit side of the upward injection passage (14a) In accordance with the injection control member 10a for adjusting the injection position and the injection angle of the fluid may be installed. In the case of a hammer-type drill bit, it is preferable to configure the fluid to be injected vertically upward without the injection control member 10a.

6 is a cross-sectional view taken along the line A-A 'showing the internal structure of the drill bit 2a according to the present invention. The core portion of the drill bit 2a is connected to the fluid supply passage 6 and the fluid branch passage 28 is formed. A square tube fluid flow pipe 26 is provided.

The slider 24 is provided to surround the outer periphery of the fluid flow pipe 26 so as to be wrapped up and down, and the slider 24 has a connecting passage for changing the flow of the fluid into the upward jet passage 14a. A large number 30 is formed. The connection passage 30 is preferably formed in accordance with the number of the upward injection passage 14a formed on the outer periphery of the drill bit 2a, but may form a space integrated with the upward injection passage 14a. By the up and down operation of (24), the connecting passage 30 and the upward injection passage 14a coincide and communicate.

In the present invention, when the connecting passage 30 and the upward spray passage (14a) by the vertical movement of the slider 24 is supplied to the fluid supply passage (6) and passes through the drill bit (2a) to the bottom hole hole Rotating operation piece 32 which can open and close the flow of the injected fluid is installed at both ends of the fluid flow pipe 26.

Referring to FIG. 7, the configuration in which the injection direction of the fluid is changed during the vertical operation of the slider 24 will be described.

Figure 7 (a) is to inject the fluid downward to the drill bit (2a) in order to discharge the slime of the bottom surface of the drilling hole during the drilling operation, (b) is a drill bit (2a) to complete the drilling operation Demonstrates an operating configuration to change the direction of injection so that fluid can be withdrawn or injected directly into the drill rod section.

To explain this, the operator lowers the drill rod during the drilling operation so that the bottom of the drill bit 2a touches the bottom of the drilling hole so that the connection passage 30 and the upward injection passage 14a are in communication with each other as shown in FIG. As a result, all of the fluid supplied to the fluid supply passage 6 is injected below the drill bit 2a to push the slime of the bottom surface of the drilling hole upward.

When the drilling operation is completed by the drill bit 2a to recover the drill bit 2a or the slime is caught in the screw 8 of the drill rod section, the operation is not smooth. As shown in FIG. When the lifter lifts up, the slider 24 in the drill bit 2a is lowered by the load.

The connection passage 30 and the upward injection passage 14a which are shifted by the lowering operation of the slider 24 communicate with each other, and the flow of the fluid is directly injected upward. At this time, the flow of the fluid injected below the drill bit 2a is The rotary operation piece 32 is swinged to block the fluid branch passage 28 formed in communication with the fluid supply passage 6 so as to be blocked.

Referring to the operation configuration of the rotary operation piece 32, during the drilling operation, the fluid branch passage 28 is opened as shown in FIG. 7A so that the flow of fluid can be injected below the drill bit 2a. When the number of the drill bits 2a and the number of the drill bits 2a are selectively lifted, the rotating operation pieces 32 on both sides are pushed inwards by pushing the inclined surface 34 of the slider 24 and swung to fit. While closing, the fluid branch passage 28 is closed.

That is, the fluid supply passage 6 and the upward injection passage 14a are opened and closed complementarily by the vertical operation of the slider 24 to change the flow direction of the fluid.

In the exemplary embodiment of the present invention, the fluid branch passage 28 is formed in a quadrangle, and both the rotary operation pieces 32 are also formed in a quadrangle so that the entire fluid branch passage 28 is closed by the rotary operation piece 32, thereby providing a fluid. All are to be injected into the upward injection passage (14a) through the connecting passage (30).

When the fluid branch passage 28 is formed in a cylindrical shape, the rotary operation piece 32 may be formed in a semicircle shape, and the rotary operation piece 32 may be formed in a quadrangle as described above, so that some of the fluid supplied may be upward. With the injection passage 14a, the remainder can be sprayed to the bottom surface of the drilled hole through the discharge port 18.

At this time, more than 50% of the fluid to be supplied is upward sprayed through the upward injection passage (14a), preferably more than 70% of the fluid is effective to upward spray.

In the embodiment of the present invention has been described as a configuration for opening and closing the fluid supply passage 6 while rotating up and down, it is installed left and right rotating operation piece 30 for opening and closing the fluid supply passage 6 and the discharge port 18 It is also possible.

In the present invention, the fixing pin 38 for limiting the vertical movement of the slider 24 is installed in the drill bit 2a.

8 to 9, a configuration of limiting the lifting operation of the slider 24 by the fixing pin 38 will be described.

FIG. 8 is a cross-sectional view taken along line B-B 'of the drill bit 2a of the present invention, and on one side of the slider 24 for lifting and lowering, an operating space 36 is formed and fixed to the case of the drill bit 2a. Fixing pin 38 is provided to be movable in the operating space (36).

9 shows an operation configuration for limiting the lifting operation of the slider 24 by the fixing pin 38. During drilling by the drill bit 2a, the slider 24 drills as shown in FIG. 9 (a). When the bit is inserted into the bit 2a and the work is completed to lift the drill bit 2a to recover the drill bit 2a or to remove the slime accumulated in the drill rod section during the drilling operation, the load of the slider 24 is applied. The lowering operation is performed, wherein the lowering operation range of the slider 24 is operated by the vertical length of the operating space 36.

As the slider 24 is lowered and the expansion limit is caught on the upper end of the working space 36, the expansion is restricted while it is not lowered further. As shown in FIG. 7, the connection passage 30 and the upward injection passage 14a are restricted. Is in communication with the fluid branch passage 28 through which the fluid is injected below the drill bit 2a by the rotary operation piece 32 so that the flow of the fluid is changed to the upper portion of the drill rod section, that is, the drill bit 2a, so as to directly Sprayed.

In the present invention, the drill bit (2) (2a) of the auger bit type provided with a screw (8) in the drill rod section has been described as an example, as shown in Figures 10 to 11 hammer to punch the ground by the hammer hit It will be appreciated that the drill bit 2b is also applicable in the same configuration. Moreover, in the case of the hammer bit, the slime may be more easily attached to the outside of the drill rod pipe and the screw 8 due to the continuous impact of the hammer.

In the exemplary embodiment of the present invention, the configuration of the slider 24 inserted into the drill bit 2a to move up and down has been described, but the upper portion of the drill bit 2a is not formed in the slider 24 into the drill bit 2a. It is also possible to configure the drill tip 22 to be fitted to the outer slide 24, and to allow the fluid supply passage 6 to be opened and closed by moving the outer slide 24.

Reference numeral 40 is a shank member.

In the present invention, the opening and closing of the fluid supply passage (6) and the upward injection passage (14a) is configured to delay the operation to remove the remaining slime remaining on the bottom of the drilling hole immediately after completion of the drilling operation, and then switch the flow of the fluid to the upward injection It is configured to remove the floating slime of the drill bit (2b) outside and the drill rod section.

12 is an operation diagram showing an operation of opening and closing the upward injection passage 14a is delayed according to an embodiment of the present invention.

In the configuration for delaying the opening and closing of the fluid supply passage 6 and the upward injection passage 14a described in the present invention, the injection direction is not immediately converted upward when the flow direction of the fluid is changed by the slider 24, but is fixed. Delays the flow of fluid to the time upward injection passage 14a so that all of the supplied fluid is used to remove residual slime at the bottom of the hole, and the flow of the fluid is switched to the upward injection passage 14a after first removing the residual slime at the bottom. This will push up the floating slime.

Looking at the configuration in which the fluid supply passage (6) is opened and closed by the slider (24) to move up and down to form a part of the drill bit (2b) of the present invention so that the fluid is injected upward through the upward injection passage (14a) 12, the operator moves up and down with the drill rod during the drilling operation as shown in FIG. 12A, and transmits the rotational force provided from the ground drill to the drill bit 2b and prevents the drill bit 2b from falling off. Since the sub 42 is lowered, the bottom surface of the drill bit 2b is in contact with the bottom surface of the drilling hole, so that the discharge port 18 is opened to blow up the slime of the bottom surface generated during the drilling operation.

When the drive sub 42 is slightly lifted by the operator as shown in FIG. 12 (b) during the drilling operation, all of the fluid used for the hammer operation is injected into the discharge port 18 as the hammer operation is not performed.

For example, in the case of the boring diameter Ø475 hammer bit, the drive sub 42 may be lifted up to about 60 mm from the body of the drill bit 2b, and when about 40 mm or more is lifted, the fluid used for hammer operation is injected into the discharge port 18. Will be.

All of the supplied fluid is injected into the discharge port 18 so that the remaining slime remaining on the bottom of the drill hole is blown up through the vertical discharge port outside the drill bit 2b. In this case, the drive sub 42 is lifted, but the drill bit 2b is raised. ) Does not rise so that the slider 24 does not operate downward, and the upward injection passage 14a is not opened.

That is, the fluid flow to the upward injection passage 14a is delayed instead of being made immediately.

Due to the delayed opening of the upward injection path 14a, even if the residual slime remains in the bottom of the hole, the drive sub 42 can be completely removed if the drive sub 42 is not held higher.

When the remaining slime is completely removed from the bottom of the drilling hole, as shown in (c) of FIG. 12, the drive sub 42 is further lifted to recover the drill bit 2b. As the drill bit 2b is lifted, the slider ( As the 24 is lowered, the discharge port 18 is closed and the upward injection passage 14a is opened to completely discharge the floating slime of the drill bit 2b and the drill rod section to the ground.

In addition, the upward injection passage 14a of the present invention may be in a state of communicating with the fluid supply passage 6 before the drilling operation, and the fluid may be upwardly sprayed through the upward injection passage 14a together with the discharge port 18. It is.

In the present invention, the upward injection path (14a) is delayed operation opening and closing using the separation distance according to the continuous lowering by drilling drilling of the main body of the drill bit (2b) and the stepping down of the drive sub (42) by the selection of the operator. can do.

The drilling operation is performed by a drill bit 2b for directly drilling a drilling hole, and a drive sub 42 that transmits the rotational force of the drilling machine located on the ground to the drill bit 2b. The drill bit 2b is a drill hole. Excavating the bottom surface is lowered at a constant speed and the drive sub 42 is stepped down in accordance with the drilling speed of the drill bit (2b).

The step-down of the drive sub 42 stops at the current position without being lowered for a predetermined time during which excavation is performed by the drill bit 2b, but stops at the current position. The drive sub 42 is to be lowered at once.

At this time, if the separation distance according to the continuous lowering of the drill bit 2b and the stepping down of the drive sub 42 is kept below the set value, the fluid is mainly through the discharge port 18 as if the drive sub 42 is slightly lifted up. It is discharged to discharge the remaining slime of the bottom surface of the drilling hole, when the distance is more than the set value, the upward injection passage (14a) is opened and the fluid is mainly injected upwards can discharge the floating slime to the outside.

The flow change of the fluid according to the separation distance between the drill bit 2b and the drive sub 42 may be operated by an operator, but in the preferred embodiment of the present invention, Stepwise fall according to the separation distance of the drill bit (2b) and the drive sub 42 is automatically controlled from the ground by the timer setting.

For example, after drilling for 3 minutes by the drill bit (2b) to maintain the height for 20 seconds without lowering the drive sub 42 immediately, or after setting 30 seconds to maintain the height for 10 seconds to remove the residual slim In addition, the above operation cycle is repeated to enable automatic operation of the perforator.

In addition, after inputting a plurality of operating cycle set values in advance to a separate control unit (not shown), by executing in real time to adjust the set values according to the working conditions, such as the type of strata, drilling depth, drilling speed, slime discharge conditions, etc. The drilling operation can be done efficiently.

In the present invention, it is possible to automatically control the perforator by configuring the drive sub 42 to operate in descending operation according to the change in the frequency or amplitude of the hammer transmitted to the drill rod or the perforator when the hammer is hit.

When the drill bit 2b body and the drive sub 42 are separated by the continuous lowering of the drill bit 2b due to the excavation, the frequency due to the hammer strike becomes small and the amplitude becomes large. By detecting the hammering vibration and the amplitude of the hammer to automatically drive the drive sub 42 in accordance with the timing, the automatic operation of the perforator is possible.

FIG. 13 is an operation diagram showing a configuration of opening and closing the upward injection passage 14b in the mubit 2c.

The mubit 2c of the present invention constitutes an opening / closing key 44 for opening and closing the upward injection port 14b by the vertical operation of the drive sub 42.

During the drilling operation, the supplied fluid is injected downward through the discharge port 18 by pressing the opening / closing key 44 upward to block the upward injection passage 14b by the lowering operation of the drive sub 42 as shown in FIG. To be.

As shown in (b) of FIG. 13, the mubit 2c of the present invention lifts only the drive sub 42 to a certain height, and injects even the fluid required for the hammer operation into the discharge port 18 so that The remaining slime can also be removed cleanly.

If strong upward spraying is required during the recovery of the drill bit 2c or during drilling, as shown in (c) of FIG. 13, first, as the drive sub-42 is lifted up, it acts on the lower side and the side of the opening / closing key 44. The opening / closing key 44 is pushed upward in the operation guide groove 46 by the rising pressure of the fluid and the elastic force of the spring. As the fluid supply passage 6 and the upward injection passage 14b communicate with each other by the upward operation of the opening / closing key 44, the fluid is injected upward, and the floating slit of the drill bit 2c and the drill rod section is discharged to the ground. .

The opening / closing key 44 is moved up and down in the operation guide groove 46 formed deeper than the horizontal height of the upward injection passage 14b communicating with the fluid pressure supply passage 6, and the opening / closing key 44 is an upward injection passage ( Until the height of 14b) rises, that is, the upstream injection of the fluid into the upward injection passage 14b by the depth of the operation guide groove 46 is delayed.

The mubit 2c shown in FIG. 14 may control the flow of the fluid through the discharge port 18 while opening and closing the upward injection passage 14b.

15 is a detailed view of the opening and closing operation unit of the present invention.

According to the present invention, the mubit 2c includes an opening and closing operation part 48 for opening and closing the fluid supply passage 6 by the operation of the opening and closing key 44. The opening and closing operation unit 48 operates in conjunction with the opening and closing key 44 for opening and closing the upward injection passage 14b by the drive sub-42.

Looking at this, during the drilling operation as shown in Figure 14 (a) by pressing the opening and closing key 44 by the drive sub 42 to block the upward injection passage (14b) so that the fluid is injected into the discharge port (18). At this time, the end of the opening and closing operation unit 48 is pressed by the opening and closing key 44, the link shaft 54 is pulled around the hinge shaft 52, and the spring 50 is compressed. The compressed spring 50 pulls the linear operating piece 20a installed at the end to open the fluid supply passage 6 so that the fluid is injected into the discharge port 18.

If strong upward spraying is required during the recovery of the drill bit 2c or during drilling, the opening and closing key 44 is compressed together with the rising pressure of the fluid when the drive sub 42 is lifted as shown in FIG. As the end of the opening / closing operation part 48 pushes up and raises the opening / closing key 44 by the spring force of the spring 50, the spring 50, which has been compressed by the hinge operation of the link shaft 54, increases and is straight. Push the operating piece 20a to block the fluid supply passage 6.

The opening and closing operation unit 48 is preferably installed at both ends of the drill bit (2c) to block the fluid supply passage (6) by the linear operation piece (20a) is pushed in both directions.

At this time, when the drive sub 42 is lifted only slightly by the operator, the opening and closing of the upstream injection port 14b is delayed and the hammer is not operated. Therefore, all the fluids used in the hammer operation are injected into the discharge port 18 and are drilled. Any remaining slimes accumulated on the bottom can be removed.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

The present invention can discharge most of the floating slime in the drilling hole during the drilling work as a strong upward slime discharge fluid flow during the construction work or ground drilling work for geothermal and resource development, reducing frictional resistance with the wall of the drilling hole drilling force This can be used to improve and reduce slime that will be scattered on the ground. In addition, it is possible to prevent the floating slime from falling during the recovery of the drill rod, so that little residual slime remains at the bottom of the drilling hole, and can be used to reduce the wear of the drill rod and to protect the drilling equipment.

Claims (22)

1. In the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside,
   The drill bit (2) is a drill bit for directly discharging the excavation slime to the ground, characterized in that the upward injection passage (14) configured to be injected by changing the flow direction of the slime discharged fluid supplied downward.
2. The method of claim 1,
   The upward injection passage 14 is configured to spray more than 50% of the supplied fluid when the drill bit 2 is recovered to the ground and when the excavation slime in the drilling hole is discharged directly to the ground at any time during the drilling operation. Drill bit for directly discharging the excavation slime characterized in that the ground.
3. The method of claim 1,
   Drill bit (2) to the ground excavation slime characterized in that the opening and closing control unit 12 to open and close the fluid supply passage (6) to adjust the amount of fluid injected through the upward injection passage 14 to the ground Drill bit for immediate draining.
4. The method of claim 1,
   The slime discharge fluid is air supplied through the core of the drill bit (2), excavation slime characterized in that a part or all of the fluid is configured to be injected upward through the upward injection passage 14 in the drill bit (2) Drill bit for direct discharge of water to the ground.
5. The method of claim 3,
   The fluid supply passage 6 and the upward injection passage 14 are drill bits for directly discharging the excavation slime to the ground, characterized in that configured to open and close complementary.
6. The method of claim 3,
   The injection ratio of the fluid amount controlled by the opening and closing control unit 12 is configured to adjust in advance before the drilling operation, the configuration to change the flow direction of the fluid in accordance with the lifting and lowering of the drill rod, and controlled by remotely controlled from the outside Drill bit for discharging the drilling slime straight to the ground, characterized in that configured to be adjusted to any one of the configuration.
7. The method according to claim 1 or 3,
   On the outlet side of the upward injection passage 14 for directly discharging the excavation slime to the ground characterized in that the injection control member 10 for adjusting any one or more of the injection position and the injection angle of the fluid to be injected upward Drill bits.
8. In the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside,
   On the drill bit (2a) is formed an upward injection passage (14a) for changing the flow direction of the slime discharge fluid supplied downward to be injected, the slider is installed in the drill bit (2a) to move up and down in the fitted form ( 24 is a drill bit for directly discharging the drilling slime to the ground characterized in that the fluid supply passage (6) is opened and closed so that the fluid is injected upward through the upward injection passage (14a).
9. In the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside,
   In the drill bit (2b) (2c) is formed an upward injection passage (14a) (14b) to be injected by changing the flow direction of the slime discharge fluid supplied downward upward
   The upward injection paths 14a and 14b move up and down while transmitting the rotational force provided from the ground drill to the drill bits 2b and 2c to prevent the drill bits 2b and 2c from falling off. Drill bit for discharging the drilling slime straight to the ground, characterized in that configured to open and close by.
10. The method of claim 9,
    The drive sub 42 is a drill bit for discharging the excavation slime directly to the ground, characterized in that configured to be controlled to operate in automatic step-down operation by a predetermined cycle timer.
11. The method according to any one of claims 3, 5, 8, and 9,
    Opening and closing of the fluid supply passage (6) and the upward injection passage (14, 14a) is a drill bit for discharging the excavation slime directly to the ground, characterized in that configured to be delayed.
12. The method of claim 9,
    The opening and closing key 44 for opening and closing the fluid supply passage 6 and the upward injection passage 14 and 14a in accordance with the lifting operation of the drive sub 42 and the opening and closing key 44 are lifted and operated. The operation guide groove 46 is provided,
    The operation guide groove 46 extends downward than the horizontal height of the upward injection passages 14 and 14a, and the opening of the upward injection passages 14a and 14b is extended by the depth of the extended operation guide grooves 46. Drill bit for discharging excavation slime straight to the ground, characterized by a delayed construction.
13. The method of claim 12,
    Opening and closing key 44 is a drill bit for directly discharging the excavating slime to the ground, characterized in that configured to be elevated by any one or more of the rising pressure of the slime discharge fluid and the spring force.
14. The method according to any one of claims 1, 8 and 9,
    A part of the fluid supplied through the fluid supply passage 6 is always injected upward through the upward injection passages 14, 14a, 14b, and the other part of the fluid flow direction by the opening and closing control unit 12 Drill bits for discharging excavation slime straight to the ground, characterized by a controlled configuration.
15. The method of claim 14,
    The opening and closing control unit 12 is to be opened and closed by any one of the linear operation piece 20 for opening and closing the fluid supply passage 6 by linear movement, and the rotation operation piece 32 for opening and closing the fluid supply passage 6 by rotating. Drill bit for discharging excavation slime straight to the ground, characterized by the configuration.
16. In the method of using the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside,
    In the drill bit 2, the slime discharge fluid supplied downward is injected directly by changing the flow direction upward through the upward injection passage 14 by controlling the opening and closing of the fluid supply passage 6 so that the drill bit 2 and the drill rod A method of using a drill bit for discharging excavation slime directly to the ground, characterized in that the excavation slime of the section is removed.
17. The method of claim 16,
    The fluid is injected upward through the upward injection passage 14 by the opening and closing control of the fluid supply passage 6, but the fluid supply passage 6 and the upward injection passage 14 complementarily open and close the upward injection passage. 14. A method of using a drill bit for directly discharging excavation slime to the ground, characterized in that to control the amount of fluid injected upward through the (14).
18. In the method of using the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside,
    In the drill bit 2, the slime discharge fluid supplied downward is injected directly by changing the flow direction upward through the upward injection passage 14, thereby removing the excavation slime between the drill bit 2 and the drill rod section, and controlling the opening and closing. Method of using a drill bit for directly discharging the excavation slime to the ground, characterized in that for opening and closing the fluid supply passage (6) by the portion (12) to adjust the amount of fluid injected into the upward injection passage (14).
19. In the method of using the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside,
    Excavation slime of the drill bit 2b and the drill rod section by allowing the flow of the fluid to be directly injected upward through the upward injection passage 14a by the opening and closing control of the fluid supply passage 6 by the lifting operation of the drive sub 42. To remove the, but the up and down injection path (14a) is opened and closed by the lifting operation of the drive sub 42,
    Lifting the drive sub 42 only to a predetermined height during the drilling operation, all of the supplied fluid is sprayed downward through the discharge port 18 to remove the remaining slime at the bottom of the drilling hole, the drive sub 42 above the set height When lifted, the slider 24 descends to block the flow of the fluid to the discharge port 18, so that the fluid is directly injected upward through the upward injection passage 14a, thereby floating the floating slit outside the drill bit 2b and the drill rod section. Method of using a drill bit to discharge the excavation slime straight to the ground, characterized in that for discharging.
20. In the method of using the ground drilling drill bit configured to discharge the excavation slime to the outside of the drilling hole by using the fluid supplied from the outside,
    By controlling opening and closing of the fluid supply passage 6 by the elevating operation of the drive sub 42, the flow of the fluid is directly injected upward through the upward injection passages 14a and 14b so that the drill bits 2b and 2c The excavation slit of the drill rod section is removed, but the upward injection path is driven by the continuous descent caused by the excavation of the drill bits 2b and 2c and the separation distance generated by the stepwise descent of the drive sub-42 by the operation of the operator. 14a and 14b to open and close,
    If the separation distance between the drill bit (2b) (2c) and the drive sub 42 is less than or equal to the set value, the supplied fluid is sprayed downward through the discharge port 18 to remove the bottom slime of the drilling hole, if it is above the set value, the upward injection passage (14a) A method of using a drill bit for directly discharging excavation slime to the ground, characterized in that the fluid is injected upwards to discharge the floating slime in the drilling hole to the outside as the opening is opened.
21. The method of claim 19 or 20,
    A method of using a drill bit for directly discharging an excavation slime to the ground, characterized in that the at least one of the fluid supply passage (6) and the upward injection passage (14) by the lifting operation of the drive sub (42).
22. The method of claim 19 or 20,
    The step-down of the drive sub 42 is controlled by the change of the frequency and amplitude transmitted to the drill rod or the perforator by the hammer strike, the method of real time control by the preset operating cycle timer, and the opening and closing adjustment by the electric control. Method of using a drill bit for directly discharging the excavation slime to the ground by adjusting by any one of the method of opening and closing the control part 12.

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