KR20170024397A

KR20170024397A - Drill bit structure

Info

Publication number: KR20170024397A
Application number: KR1020150119599A
Authority: KR
Inventors: 곽기현
Original assignee: 삼성중공업 주식회사
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2017-03-07
Also published as: KR101722037B1

Abstract

A drill bit structure is disclosed. A drill bit structure according to an embodiment of the present invention includes a frame installed at a tip of a drill pipe; A drill bit rotatably installed on the frame about a rotation center axis perpendicular to a rotation center axis of the frame and a part of the drill bit exposed at a front end of the frame; And a drive for rotating the drill bit relative to the frame.

Description

[0001] DRILL BIT STRUCTURE [0002]

The present invention relates to a drill bit structure.

A drilling operation is performed to drill the seabed well. The drilling operation is performed in such a manner that the drill bit installed at the tip of the drill pipe rotates and punctures the ground.

Such drilling operations require the drill bit to be worn or damaged during operation and must be replaced. A drill bit replacement scheme has been used that pulls the entire drill pipe out of the ground. This replacement method has a problem in that the replacement time is long and the entire period of the drilling operation is increased or the drilling operation cost is increased.

Japanese Patent Publication No. 5484044 (Feb.

Embodiments of the present invention seek to provide a drill bit structure configured to reduce replacement time and cost.

According to an aspect of the present invention, there is provided a drill pipe, comprising: a frame installed at a distal end of a drill pipe; A drill bit rotatably installed on the frame about a rotation center axis perpendicular to a rotation center axis of the frame and a part of the drill bit exposed at a front end of the frame; And a drive for rotating the drill bit relative to the frame.

The frame may be formed with a receiving portion in which the drill bit is partially received.

The receiver may be provided with a light and a camera for monitoring the state of the drill bit.

The drill bit includes a rotating body; And a drill tip protruding from an outer circumferential surface of the rotating body.

The driving unit includes: a driving motor fixed inside the frame; And a transmitting member for transmitting a driving force of the driving motor to the drill bit.

According to the embodiment of the present invention, the drill bit can be replaced within the hole only by rotating the drill bit relative to the frame, so that the cost and time of drilling operation can be saved.

1 is a view showing an internal structure of a drill bit structure according to an embodiment of the present invention,
2 is a view showing a structure of a drill bit according to an embodiment of the present invention,
3 and 4 are views for explaining the operation of the drill bit structure according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, do.

FIG. 1 is a view showing an internal structure of a drill bit structure according to an embodiment of the present invention, and FIG. 2 is a view showing the structure of a drill bit according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a drill bit structure 100 according to the present embodiment is provided at the tip of a drill pipe 10 to perforate a ground, and includes a frame 110, a drill bit 130, (150).

The frame 110 is installed at the tip of the drill pipe 10. The drill pipe 10 rotates about the rotation center axis X ₁ by a separate driving unit (not shown). At this time, the frame 110 rotates together with the drill pipe 10.

In the frame 110, a receiving groove 111 for receiving a drill bit 130 to be described later is formed. The drill bit 130 is rotatably installed in the frame 110 while being partially accommodated in the receiving groove 111. At this time, the rotating shaft 132 of the drill bit 130 may extend through the side wall of the receiving groove 111 and extend into the frame 110 to be rotatably supported.

In the receiving groove 111, a light 161 and a camera 162 for monitoring the state of the drill bit 130 may be installed. The illumination 161 illuminates the inside of the receiving groove 111 and the camera 162 photographs the drill bit 130 located inside the receiving groove 111. The photographed image is transmitted to the outside by the wire / wireless method, and the state of the drill bit 130 can be monitored through the transmitted image.

The on / off operation of the illumination 161, the on / off operation of the camera 162, the transmission of the image, and the like can be performed by the control unit 165. [ The control unit 165 may be disposed within the frame 110, but is not limited thereto. The control unit 165 may be controlled by an external main control unit (not shown).

A drill bit 130 is rotated relative to frame 110 about the rotational center axis of rotation perpendicular to the (X ₁₎ a central axis (X ₂₎ of the frame (110). Rotation of the drill bit 130 relative to the frame 110 is performed during replacement or monitoring of the drill bit 130, and a description thereof will be given later.

A part of the drill bit 130 provided in the frame 110 is exposed to the outside at the front end of the frame 110 and the other part is received in the receiving groove 111. [ The drill bit 130 exposed to the outside from the tip of the frame 110 contacts the ground to perforate the ground.

In this embodiment, the drill bit 130 includes a rotating body 131 and a drill tip 133.

The rotating body 131 may have a cylindrical shape, but is not limited thereto.

The drill tip 133 protrudes from the outer circumferential surface of the rotating body 131. As the drill pipe 10 and the frame 110 rotate, the ground is punctured by the friction by the drill tip 133. The drill tip 133 may be integrally formed with the rotary body 131 or may be separately formed from the rotary body 131 and then coupled to the rotary body 131.

It will be appreciated that, in other embodiments, various types of drill bits may be provided that are rotatably mounted to the frame 110 to puncture the ground.

The driving unit 150 rotates the drill bit 130 relative to the frame 110.

In this embodiment, the driving unit 150 includes a driving motor 151 and a transmitting member 153.

The drive motor 151 is fixedly installed inside the frame 110.

The transmitting member 153 transmits the rotational driving force of the driving motor 151 to the drill bit 130. The transmission member 153 includes a drive gear 1531 coupled to the motor shaft of the drive motor 151 and a driven gear 1531 engaged with the drive gear 1531 and coupled to the rotary shaft 132 of the drill bit 130. [ And a gear 1533. At this time, the rotational driving force of the driving motor 151 is transmitted to the rotating shaft 132 of the drill bit 130 through the driving gear 1531 and the driven gear 1533.

Needless to say, in other embodiments, various types of drivers for rotating the drill bit 130 relative to the frame 110 may be provided.

3 and 4 are views for explaining the operation of the drill bit structure according to an embodiment of the present invention. Hereinafter, the replacement operation of the drill bit structure 100 according to the present embodiment will be described with reference to Figs. 1, 3, and 4. Fig.

Referring to FIG. 1, the drill pipe 10 rotates about the rotation center axis X ₁ for drilling on the ground. At this time, the drill bit structure 100 provided at the front end of the drill pipe 10, more specifically, the drill bit 130 exposed at the front end of the frame 110 rotates together with the drill pipe 10 to perforate the ground.

When the drill bit 130 exposed at the tip of the frame 110 in the drilling operation is worn as shown in Fig. 3, the rotation of the drill pipe 10 is stopped. Then, the driving unit 150 is operated to rotate the drill bit 130 about the rotation center axis X ₂ with respect to the frame 110. At this time, the other part of the drill bit 130, which has been accommodated in the receiving groove 111 without being used previously, is exposed at the tip of the frame 110 as shown in FIG.

The drill bit 130 then rotates and performs a drilling operation.

The drill bit structure 100 according to the present embodiment operates in such a manner that the drill bit 130 rotates with respect to the frame 110, unlike the conventional drill bit structure in which the drill pipe is pulled out and replaced when the drill bit is worn or damaged So that the cost and time of the drilling operation can be saved.

Hereinafter, the monitoring operation of the drill bit structure 100 according to the present embodiment will be described with reference to FIGS. 1, 3, and 4. FIG.

Referring to Figure 1, the drill bit structure 100 performs a drilling operation. The drill bit structure 100 stops the drilling operation for a predetermined period of time during the drilling operation. And the state of the drill bit 130 is monitored through the camera 161 and the illumination 161 installed in the receiving groove 111 while the drill bit 130 rotates with respect to the frame 110. [

If, as a result of the monitoring, the drill bit 130 is not worn or damaged as shown in Fig. 1, the drilling operation is continued by the drill structure.

If the monitoring result shows that a portion of the drill bit 130 is worn or damaged, as shown in FIG. 3, the drill bit 130 rotates relative to the frame 110 to move the drill bit 130, A portion is exposed at the front end of the frame 110.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10: Drill pipe
100: drill bit structure
110: frame
111: receiving groove
130: Drill bit
131: rotating body
132: rotating shaft
133: Drill tip
150:
151: drive motor
153:
161: Lighting
162: camera
165:

Claims

A frame installed at the tip of the drill pipe;
A drill bit rotatably installed on the frame about a rotation center axis perpendicular to a rotation center axis of the frame and a part of the drill bit exposed at a front end of the frame; And
And a drive for rotating the drill bit relative to the frame.

The method according to claim 1,
Wherein the frame is formed with a receiving portion in which the drill bit is partially received.

3. The method of claim 2,
Wherein the receiving portion is provided with a light and a camera for monitoring the state of the drill bit.

The method according to claim 1,
The drill bit
A rotating body; And
And a drill tip projecting from an outer circumferential surface of the rotating body.

The method according to claim 1,
The driving unit includes:
A drive motor fixed inside the frame; And
And a transmitting member for transmitting the driving force of the driving motor to the drill bit.