KR20150111201A - Coring apparatus, coring system containing the same and method of coring using the same - Google Patents

Abstract

The present invention relates to a boring apparatus, a boring system containing the same, and a method of boring using the same. A boring apparatus according to the present invention includes a connection part which is connected to an external driving part; a first pillar part extended from the connection part; a weight part which surrounds the edge of the first pillar part; a second pillar part which is located in the lower part of the first pillar part and has a core; and an elastic part which absorbs impact when the second pillar part touches the ground.

Description

[0001] The present invention relates to a drilling machine, a drilling system including the same, and a drilling method using the drilling system,

The present invention relates to a drilling machine, a drilling system including the drilling machine, and a drilling method using the same.

Numerous drilling devices have been developed for studying geological resources or observing changes in earth's history and environment from sediments.

In most drilling equipment, a drilling rig with a core in which a drilling object is to be placed is placed on the seabed or in the bottom, and then inserted into the sediment using gravity or the like. The sediment is placed in the core by the insertion of the drill and the drill is recovered to obtain a sediment sample.

However, there is a problem that the borehole itself is impacted by the impact at the moment when the borehole touches the sediment (ground), and the depth of insertion is insufficient.

On the other hand, in most of the drilling, the drill is located deep in the sea bed or the bottom of the sea, so it is difficult to confirm whether the drill is vertically inserted into the sediment.

Further, when the drilling machine is inserted into the sediment without maintaining the vertical position, there is a problem that the position (depth) in the sediment of the expected sample is different from the position (depth) in the sediment of the actually obtained sample.

FIG. 1 shows a case where the drilling machine 11 is correctly inserted into a deposit while maintaining a vertical position, and FIG. 2 shows a case where the drilling machine 11 is inserted incorrectly while being inclined to the sea floor.

When the sediment is sampled at the same length on the drill core, the actual drilling of FIG. 1 and the drilling of FIG. 2 are drilled at different depths.

However, in the present drilling system, there is no way to correct the actual depth when the drilling is performed as shown in FIG.

Korean Registration No. 0732395 (published on June 27, 2007) Japanese Laid-open Patent Application No. 1-322093 (published on December 27, 1989)

Accordingly, it is an object of the present invention to provide a drilling machine, a drilling system including the drilling machine, and a drilling method using the drilling machine, which can increase the depth of drilling while absorbing impact at the time of ground contact.

The above object of the present invention can be achieved by a drilling machine comprising: a connection part connected to an external driving part; A first post extending from the connection; A weight surrounding the circumference of the first post; A second pillar portion located below the first pillar portion and having a core space formed therein; And an elastic portion that absorbs impact when the second pillar portion is grounded.

The weight body may further include at least one of a depth meter and an inclinometer located in the internal accommodation space.

And an engaging portion located between the first post and the second post, wherein the resilient portion is positioned between the weight and the engaging portion.

And a support portion including a seat portion on which the weight is seated and a column portion extending from the seat portion to form a space portion surrounding the first column and the elastic portion is positioned between the engagement portion and the support portion .

The weight may be separated from the first column by the elastic movement of the elastic body.

The object of the present invention is to provide a drilling system including: a drill having a core filled with an object to be drilled; A driving unit for controlling vertical movement of the drilling machine; And a rope connecting the drilling machine and the driving unit, wherein the drilling machine comprises: a first pillar; A weight formed around the first post; A second pillar portion located below the first pillar portion and including the core; And an elastic portion absorbing an impact when the second pillar portion is in contact with the ground, wherein the weight is separated from the first pillar by elastic movement of the elastic body and can be achieved by a drilling system.

And may further include at least one of an inclination meter for measuring the inclination of the drill and a depth meter for measuring the depth, the drill bit being located in an internal accommodation space formed in the weight.

And a depth corrector for correcting the actual depth of the drill from the data of the inclinometer and the depth gauge.

A tension meter for measuring the tension of the rope; And a determination unit for determining whether the drilling rig is accurately drilled based on the measurement result of the tension meter.

According to an aspect of the present invention, there is provided a drilling method, comprising: a connecting portion connected to an external driving portion; a first column extending from a connecting portion; a weight formed around the first column; Providing a drill comprising a second column portion including a core and an elastic portion contacting the weight and deforming when the second column portion contacts the ground; And the drilling is performed by using the drilling machine. In the drilling step, the weight is separated from the first column by the elastic movement of the elastic body and is performed.

Measuring an inclination and a depth of the drill in the drilling step; And correcting the actual drilling depth of the driller based on the measured slope and depth.

Measuring a tensile force of the rope connecting the driving unit and the drill in a drilling process; And determining whether the drilling rig is accurately drilled on the basis of the measurement result of the measured tension meter.

According to the present invention, there is provided a drilling machine, a drilling system including the drilling machine, and a drilling method using the drilling machine, which can increase the depth of drilling while absorbing the impact at the time of ground contact.

FIG. 1 shows a case where drilling is performed vertically,
Fig. 2 shows a case where the drilling is made obliquely,
3 is a front view of a drill according to an embodiment of the present invention,
4 is an exploded perspective view of a drill rig according to an embodiment of the present invention,
5 shows a modification of a drill according to an embodiment of the present invention,
6 to 8 illustrate a drilling system according to an embodiment of the present invention,
9 illustrates a depth correction method according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the technical concept of the present invention, are incorporated in and constitute a part of the specification, and are not intended to limit the scope of the present invention.

Hereinafter, the drilling rig is described as an example using a gravity type (weight), but the drilling rig of the present invention can be applied to a type using a piston or a box drilling type.

Hereinafter, the drilling of sediments on the seabed is described by way of example, but the present invention can also be applied to other drilling objects other than sediments and sediments of the bottom.

3 to 5, a drill according to an embodiment of the present invention will be described.

The drilling machine 10 includes a connection part 110, a first pillar 120, a second pillar 130, a coupling part 140, a support part 150, an elastic part 160 and a weight part 170.

The connection part 110 is connected to an external driving part for moving the drilling machine 10 up and down. And may be connected to an external driving unit through, for example, a rope.

The first column 120 is cylindrical, and the weight 170 is positioned around the first column 120. A screw thread 121 is formed on a lower outer circumferential surface of the first column 120 and is engaged with an upper screw thread 141 on the inner surface of the joint portion 140.

The second column 130 is also cylindrical in shape and has a core in which sediments are located. A screw thread 131 is formed on the outer circumferential surface of the upper portion of the second column 130 and is engaged with the lower screw thread 141 on the inner surface of the joint portion 140.

The coupling portion 140 has an outer diameter larger than that of the first and second pillars 120 and 130 and has an inner portion for coupling and receiving the lower portion of the first pillar 120 and the upper portion of the second pillar 130 do.

The support part 150 includes a column part 151 having a receiving part 153 for receiving the first column 120 and a seating part 152 for mounting the weight part 170 thereon. Although the support part 150 is integrally formed in the embodiment, the support part 150 may be formed of various parts in other embodiments.

The elastic portion 160 is formed of a spring, and the lower portion thereof is in contact with the upper surface of the coupling portion 140, and the upper portion thereof is in contact with the lower surface of the seating portion 152. The upper portion of the elastic portion 160 is coupled to the coupling portion 140 and the lower portion of the elastic portion 160 is coupled to the seating portion 152. The bonding method may be a conventional method, for example, a welding method may be used. In another embodiment, a separate member may be provided to receive and fix the end of the spring of the coupling portion 140 and the seating portion 152.

The weight portion 170 is connected to the sub weight portion through the fastening member 172 and increases the weight of the drill 10 to allow the second column 130 to be deeply inserted into the sediment. In the weight portion 170, a receiving space 171 is formed, in which a depth / inclinometer 51 is located. The configuration and operation of the depth / inclinometer 51 will be described later.

Hereinafter, the operation of the drilling machine 10 according to the embodiment of the present invention will be described.

The drilling machine 10 is put into the seabed by the operation of the external driving part and comes into contact with the sea floor (ground) by the weight of the weight part 170. [ The bottom of the second pillar 130 collides with the ground and the second pillar 130 is inserted into the ground so that the sediment enters the core of the second pillar 130.

According to the present invention, the elastic portion 160 is contracted as shown in FIG. 5 by the impact when the second post 130 is contacted. The supporting part 150 and the weight part 170 do not absorb shock because the first and second pillars 120 and 130 are coupled by the coupling part 140, And is moved apart from the first pillar 120 and the second pillar 130 by deformation. That is, the shock absorption of the elastic part 160 is enabled by the support part 150 and the weight part 170 that move separately from the pillars 120 and 130.

The impact applied to the depth / slope meter 51 located inside the weight portion 170 is dispersed by the shock absorption of the elastic portion 160, thereby improving the stability of the depth / slope meter 51. [

The weight portion 170 moves up and down according to the deformation of the elastic portion 160 so that the second pillar 130 is inserted into the sediment more deeply by applying repetitive force to the drill 10.

6 to 8, a drilling system 1 according to an embodiment of the present invention will be described.

The drilling system 1 includes a driller 10, a drive 20, a rope 30, a slope / depth gauge 51 and a tension meter 71.

The drilling machine 10 and the driving unit 20 are connected to each other through the rope 30. The drilling machine 10 is raised and lowered by the operation of the driving unit 20. [ The slope / depth gauge 51 measures the slope and depth of the drilling rig 10.

The drilling machine 10 is connected to the rope 30 and the drilling machine 10 is raised and lowered by the operation of the drive unit 20. [

When the rope 30 is further loosened after the drilling machine 10 is located on the seabed surface, the weight of the weight 170 causes the second column 130 to be inserted into the deposit.

The driving unit 20 can be constructed using an electric motor or the like, and raises and lowers the drill 10. When the drilling is performed in a line, the driving unit 20 is positioned on a line. More specifically, the driving unit 20 may be an electric winch.

The rope 30 connects the drive unit 20 and the drilling machine 10 and transmits the power of the drive unit 20 to the drilling machine 10. The rope 30 may be made of any material and material suitable for power transmission. For example, natural material ropes, synthetic fiber ropes, metal wires, chains, and the like can be used.

The rope 30 is changed in the extending direction by the two pulleys 41, The extending direction of the drilling machine 10 in the vertical direction is changed by the first pulley 41 and the extending direction is changed from the drive portion 20 to the first sheave 42 by the second sheave 42 do. The first pulley 41 may be located at the distal end of the line crane.

In another embodiment, the second pulley 42 may be omitted, and in an alternative embodiment additional pulleys may be used.

The slope and depth measured by the slope / depth gage 51 are transmitted to the display unit 61 and the depth correction unit 62 in a wireless or wired manner. In the display unit 61, the depth and the degree of inclination according to the drilling process are shown for the convenience of the user. Although not shown, a storage unit for storing depth and inclination data may be provided. The depth corrector 62 calculates the actual depth of drilling based on the measured slope and depth.

The tension meter 71 measures the tension of the rope 30 between the first pulley 41 and the second pulley 42. The tension of the rope 30 varies depending on whether the driving part 20 is operated or not, and the position of the drilling machine 10 or the like. For example, when the driller 10 is underwater and receives buoyancy, the tension becomes smaller than when the driller 10 is positioned above the water surface.

The tension meter 71 is connected to the rope 30 through a tension pulley 43 so as not to interfere with the movement of the rope 30. A connecting member 72 is positioned between the tension meter 71 and the tension pulley 43. One side of the connecting member 72 is coupled to the tension pulley 43 and the other side is coupled to the tension meter 71 by screwing. The tension meter 71 is supported on the other linear structure through the auxiliary rope 31. A connecting member 73 is also present between the tension meter 71 and the auxiliary rope 31.

The tension meter 71 can withstand the tension range of the rope 30 and can use anything as long as it can be connected to the tension pulley 43 and the auxiliary rope 31.

The tension data measured by the tension meter 51 is transmitted to the display unit 61 and the determination unit 82 in a wireless or wired manner. The display unit 61 shows a change in tension due to the drilling process (for a user's convenience). Although not shown, a storage unit for storing tension data can be provided.

The determination unit 82 determines whether the drilling has been accurately performed based on the measured tension data. Specifically, it is possible to judge the size of the tensile force when recovering the drilling rig 10 inserted into the seabed surface (moment taken at the bottom of the sea floor), or to compare the tensile force when the drilling rig 10 is in another state.

If it is determined to be an absolute value, it is determined that accurate drilling has been performed when the tension is greater than or equal to a predetermined value at the time of recovery.

In the comparison judgment, the tension A at the time of recovery can be compared with the tension B when the driller 10 is located above the sea surface or with the tension C when the driller 10 is located below the sea surface . For example, if the tension A is greater than the tension B (for example, 200 kg, 500 kg, etc.) or several times (for example, 2 times, 5 times, 10 times, etc.) do. The same method can be used for the case of comparing with the tension C as well.

The predetermined value, the predetermined level, or the specific value several times as a criterion of judgment can be adjusted according to the weight of the drilling machine 10 or the like.

As described above, the reason why accurate drilling can be determined by comparing the absolute value of the tension A at the time of recovery or other tension is as follows.

The tension of the rope 30 in the drilling process becomes largest when the drive unit 20 is operated to recover the drilling rig 10 inserted into the sea floor. However, when the drilling is inaccurately performed as shown in FIG. 2, the force for recovering is dispersed. Therefore, in the case of FIG. 2, the tensile force at the time of recovery is lower than when the drilling is accurately performed as shown in FIG. Therefore, by observing the tension before and after collection / collection, it is possible to judge whether or not drilling is performed correctly.

The embodiment described above can be variously modified. The depth meter and the inclinometer can be separated from each other and positioned in the drilling machine 10. Also, there may be only an inclinometer without depth gauge. If only the inclinometer exists, the actual depth may be calculated using the length of the sampling sediment. It is also possible to determine whether or not the drilling is well performed even if only the inclinometer exists.

The depth / inclinometer, the depth meter and the inclinometer can use those having appropriate performance among the products in the market, and can be used for waterproofing or accommodating in the weight 170.

Hereinafter, a method of calculating the actual drilling depth of the depth corrector will be described with reference to FIG.

As the drilling progresses, the depth / inclinometer 51 measures the inclination angle? And depth d. The measured result is transmitted to the depth correction unit 62.

When the drilling is made obliquely, there is a difference between the length (L1) of the drilling rod inserted in the seabed and the depth of the sea floor L2 actually drilled. The depth corrector 52 measures the depth L2 of the actual drilling using the measured inclination angle? And depth d.

Meanwhile, the inclination angle may be changed during the drilling process, and the depth corrector 52 may calculate the actual drill depth by the length of the sampled sediment using the inclination angle (?) Data that changes according to the depth (d).

As described above, according to the present invention, the actual drilling depth can be determined by measuring the slope and the depth.

The above-described embodiments are illustrative of the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims (12)

In the drilling machine,
A connection part connected to an external driving part;
A first post extending from the connection;
A weight surrounding the circumference of the first post;
A second pillar portion located below the first pillar portion and having a core space formed therein;
And an elastic portion for absorbing an impact upon land contact of the second post portion. The method according to claim 1,
An internal space is formed in the weight body,
Further comprising at least one of an in-depth meter and an inclinometer located in the internal accommodation space. The method according to claim 1,
Further comprising an engaging portion located between the first post and the second post,
And the resilient portion is located between the weight and the engaging portion. The method of claim 3,
A seat portion on which the weight body is seated,
And a support portion including a column portion extending from the seating portion to form a space portion surrounding the first column,
And the resilient portion is located between the engagement portion and the support portion. The method according to claim 1,
And the weight is separated from the first column by the elastic movement of the elastic body. In a drilling system,
A drill having a core filled with a drilling object;
A driving unit for controlling vertical movement of the drilling machine;
And a rope connecting the drilling machine and the drive unit,
The drilling machine,
A first pillar portion;
A weight formed around the first post;
A second pillar portion located below the first pillar portion and including the core;
And an elastic portion for absorbing an impact at the time of ground contact of the second post portion,
And the weight is separated from the first column by the elastic movement of the elastic body and is moved. The method according to claim 6,
Further comprising at least one of an inclination meter for measuring the inclination of the drill and a depth meter for measuring the depth, the drill bit being located in an internal accommodation space formed in the weight. The method of claim 6,
Further comprising a depth corrector for correcting the actual depth of the drill from the data of the inclinometer and the depth gauge. The method of claim 6,
A tension meter for measuring the tension of the rope;
Further comprising a determination unit for determining whether the drilling rig is accurately drilled based on a measurement result of the tension meter. In the drilling method,
A first pillar portion extending from the connection portion; a weight formed around the first pillar portion; and a second pillar portion located below the first pillar portion and including a core, And a resilient portion that is in contact with the weight and deforms when the second post is brought into contact with the ground;
And drilling by using the drilling machine,
And the weight is separated from the first column by the elastic movement of the elastic body during the drilling step. 11. The method of claim 10,
Measuring an inclination and a depth of the drill in the drilling step;
And correcting the actual drilling depth of the driller based on the measured slope and depth. 11. The method of claim 10,
Measuring a tensile force of the rope connecting the driving unit and the drill in a drilling process;
And determining whether the drilling rig is accurately drilled on the basis of the measurement result of the measured tension meter.

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