KR20160098547A - Hatch structure and drillship including the same - Google Patents

Abstract

The present invention relates to a hatch structure and a drill ship including the same. The hatch structure according to the present invention comprises: a hatch which is an opening of a deck on an equipment accommodation space; a support unit installed on an inner wall of the equipment accommodation space along a circumference of the hatch; and a hatch cover coupled to the support unit to cover the hatch. The support unit is positioned to be apart from the upper portion of the inner wall by a predetermined distance so that an upper surface of the hatch cover and an upper surface of the deck are flat. The hatch structure and the drill ship including the same according to the present invention can prevent a deck and a hatch cover from being deformed by having the support unit installed on an inner wall of the equipment accommodation space with the hatch and coupling and fixing the cover plate of the hatch cover to the supporting unit, can make the height of the hatch cover correspond to the height of a deck when the hatch cover is installed, can reduce reinforcing material from being wasted and further prevent the hatch cover from being deformed by installing the reinforcing material to prevent the deformation or degree of buckling of the cover plate, and can prevent water from permeating into the equipment accommodation space by having a drain part provided at a boundary part of the deck and the hatch cover.

Description

Hatch structure and drillship including same

The present invention relates to a hatch structure and a drill rig with the hatch structure.

Due to the recent rapid industrialization, the use of resources such as oil has skyrocketed, and the stable production and supply of oil is becoming a very important issue. However, the oil field in the continental or coastal waters has already been drilled. In recent years, interest has been focused on the development of a deep-sea deep-sea oil field. Drilling is generally used to drill deep-sea oilfields.

In addition, as the area of untapped polar regions, which are abundant in natural resources, decreases, the development of polar roads will drill natural resources in the polar regions, and polar drills are being constructed to enable sailing and drilling in the polar regions.

The drill ship is an offshore structure that is equipped with advanced drilling equipment and is built in a shape similar to that of a ship so that it can be sailed by its own power. It is capable of collecting crude oil or gas in deep sea area where a marine platform can not be installed, It is advantageous that the drilling can be terminated and the drilling can be carried out by moving to another point.

Such drill ships must have large hatch structures on the deck for maintenance of various operational equipment installed inside the hull or for use of various drilling equipment stored inside the hull. In particular, the drill pole for polarity is composed of an enclosed area in which almost all areas are enclosed to prevent freezing and freezing in a cryogenic environment and for smooth operation of equipment and safety of the crew. In the polar environment, riser, drill pipe, It is necessary to load the equipment which is loaded on the upper deck so that it is exposed as it is on the inside of the hull to prevent freezing and damage. In addition, for the passage way and maintenance, The installation of more large hatch structures is required compared to drill ships.

The large hatch structure installed on the drill rig is required to be installed so as to match the height of the deck since the drilling works are performed on the deck in a large amount, and various drilling equipments can be loaded in the equipment accommodation space or moved easily to the outside Deck deformation and deformation of the hatch cover are liable to occur due to the construction of the hatch having an opening at a very large size. This causes a great difficulty in installation work and fabrication, and it is difficult to reinforce the hull around the hatch. It is necessary to develop a hatch that can be solved.

Korean Patent Publication No. 10-2012-0028412 (public announcement: March 23, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hatch structure capable of preventing deformation of a deck and deformation of a hatch cover even when a hatch is opened with a very large size, Thereby providing a drill provided with the drill.

It is also an object of the present invention to provide a hatch structure and a drilling rig having the hatch structure so that the height of the hatch cover matches the height of the deck.

A hatch structure according to one aspect of the present invention includes: a hatch opening a deck on an equipment accommodation space; A support portion installed on an inner wall of the equipment accommodating space along a periphery of the hatch; And a hatch cover coupled to the support portion to shield the hatch. The upper surface of the hatch cover is flush with the upper surface of the deck so that the support portion is positioned below the upper portion of the inner wall by a predetermined distance. do.

Specifically, the support portion may include a plurality of brackets disposed at predetermined intervals on the inner wall; And a liner plate fixed to the upper surface of the plurality of brackets and having a plurality of first insertion holes.

Specifically, the hatch cover may have a shape corresponding to the shape of the hatch, a cover plate having a size smaller than the size of the hatch; A rim plate positioned inside the cover plate at a predetermined distance from the edge of the cover plate and fixed to the lower surface of the cover plate; And a plurality of second inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / inserting / And a pad plate on which a ball is formed.

Specifically, the hatch cover may further include a stiffener fixedly installed on a lower surface of the cover plate on the inner side of the rim plate.

Specifically, the stiffener includes: a transverse stiffener in which a plurality of stiffeners are arranged in the longitudinal direction so as to reinforce the transverse stiffness of the cover plate; And a longitudinal stiffener in which a plurality of longitudinal stiffeners are arranged laterally so as to reinforce the longitudinal stiffness of the cover plate.

Specifically, the plurality of transverse stiffeners and the plurality of longitudinal stiffeners are provided so as to intersect with each other, and are provided so as to have a high density in the vicinity of the edge of the cover plate relatively weak in buckling phenomenon, So that the density can be set to be low in the central portion.

Specifically, the reinforcing member may further include a plurality of auxiliary stiffeners installed between the longitudinal stiffener and the transverse stiffener, which are installed in close proximity to the edge of the cover plate, so as to reinforce the rigidity of the corner portion of the cover plate.

Specifically, the hatch cover may further include a plurality of lugs provided on an upper portion of the cover plate for transportation, and the lug may be formed of an eye plate having a recessed structure so that the upper surface of the hatch cover may be flat. .

Specifically, it is preferable that the hitch cover further includes a coupling portion for coupling and fixing the hatch cover, and the coupling portion is provided between the liner plate of the support portion and the pad plate of the hatch cover, and a plurality of third insertion holes are formed packing; And a bolt member for fixing the hatch cover and the support portion to each other.

Specifically, the bolting member may include a stud bolt and a nut, and the stud bolt may be inserted through the first through third insertion holes to fix the hatch cover and the support unit together.

Specifically, the apparatus further includes a drain portion formed between the hatch cover and the deck, wherein the drain portion is formed along the periphery of the hatch cover, the liner plate of the support portion forms the bottom, Wherein the plate and the packing of the coupling portion form one side wall, and the inner wall of the equipment accommodation space forms another side wall; An exhaust hole formed in at least one portion of the liner plate forming the bottom of the drainage passage; And a drain pipe having one end connected to the exhaust hole and the other end connected to the outside.

The hatch structure and the drill stitch having the hatch structure according to the present invention are characterized in that a support portion is provided on the inner wall of the equipment receiving space in which the hatch is formed and the cover plate of the hatch cover is fixedly coupled to the support portion to prevent deformation of the deck and deformation of the hatch cover And can be made to coincide with the height of the deck when the hatch cover is installed.

In addition, the hatch structure and the drill stitch having the same according to the present invention can reduce the waste of the stiffener by providing the stiffener installed to prevent deformation of the cover plate according to the degree of buckling, Can be further prevented.

In addition, the hatch structure and the drill stitch having the hatch structure according to the present invention can prevent water from penetrating into the equipment accommodation space by providing a drain portion at a boundary portion between the deck and the hatch cover.

1 is a side view of a drill rig with a hatch structure according to an embodiment of the present invention.
2 is a partial cut-away plan view of a hatch structure according to an embodiment of the present invention.
3 is a detailed plan view of the liner plate.
4 is a cross-sectional view taken along the line X-X 'in FIG.
5 is a cross-sectional view taken along line Y-Y 'of FIG.
Fig. 6 is an enlarged view of part A of Fig. 4 and Fig.
7 is an enlarged cross-sectional view for explaining the drainage portion of the present invention.
8 is a detailed view of the lug of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

1 is a side view of a drill rig with a hatch structure according to an embodiment of the present invention.

1, the drill rig 1 of the present invention includes a plurality of equipment accommodation spaces 110 in the interior of the hull 10 so as to accommodate various operation equipment or various drilling equipment required for drilling, A hatch 120 is formed to open the deck 20 for use in maintenance of various operation equipment or various drilling equipment and is formed in the inner wall 111 of the equipment accommodating space 110 The hatch structure 100 may be provided with a hatch cover 140 that is seated on the support portion 130 and is fixedly coupled to the support portion 130 by a coupling portion 150 to shield the hatch 120. [ have. Such a hatch structure 100 of the present invention will be described in detail below with reference to Figs. 2 to 8. Fig.

The hatch structure 100 of the present invention to be described below is not limited to the one provided in the drill rig 1 of the present invention and can be used for drilling, refining, storing and transporting oil, gas, Of course, can also be provided in offshore structures such as floating crude oil production storage and unloading facilities (FPSO), semi-submersible, fixed platforms, and cargo carriers.

3 is a detailed plan view of the liner plate, FIG. 4 is a cross-sectional view taken along the line X-X 'of FIG. 1, and FIG. 5 is a cross- FIG. 6 is an enlarged view of part A of FIG. 4 and FIG. 5, FIG. 7 is an enlarged sectional view for explaining a drainage part of the present invention, and FIG. 8 Is a detailed view of the lug of the present invention.

2 to 8, the hatch structure 100 according to an embodiment of the present invention includes an equipment accommodation space 110, a hatch 120, a support 130, a hatch cover 140, A part 150, and a drain 160.

In this embodiment, the hatch structure 100 will be described by way of example as being provided in the drill string 1, and such a hatch structure 100 can be used for various types of operating equipment installed inside the hull 10 of the drill string 1 May be provided on the deck 20 for maintenance or use of various drilling equipment stored within the hull 10. In particular, drilling rigs (1) for polar drilling are designed to prevent freezing and freezing in a cryogenic environment and to ensure smooth operation of equipment and safety of crews. Almost all areas are enclosed in a sealed structure. Rivers, drill pipes, casings In the same drilling operation (1), it is necessary to load the drilling equipments loaded on the upper deck in the hull (10) to prevent freezing and damage. In addition, There is a demand for a hatch structure 100 having a larger number of hatches 120 compared to the hatch structure 1

The equipment accommodation space 110 may be formed inside the deck 20 for installing various operating equipment or loading various types of drilling equipment, and a hatch 120 to be described later may be formed by opening the upper part And can be opened and closed by a hatch cover 140 to be described later.

The hatch 120 may be formed by opening a deck 20 on the equipment accommodation space 110 so that various equipment can be loaded, maintained, or moved to the equipment accommodation space 110, a deck opening 121 and a clear opening 122 may be formed.

The deck opening 121 may be defined as an opening formed by removing the deck 20 such that the upper portion of the equipment receiving space 110 is opened. Or may extend a certain length inwardly from the inner wall 111 so as to form a cover of the drainage line 161 of the drainage unit 160, which will be described later.

The clearance opening 122 is formed in the inner wall 111 of the equipment accommodating space 110 for supporting and fixing the hatch cover 140 to be described later in a state in which the deck opening 121 is formed, The clearance 122 may be defined as a substantially open channel of the hatch 120 formed to load, maintain, or move the equipment .

The support part 130 is installed on the inner wall 111 forming the equipment accommodation space 110 along the circumference of the hatch 120 so as to support and support the hatch cover 140 to be described later, The upper surface of the hatch cover 140 and the upper surface of the deck 20 may be positioned below the inner wall 111 by a predetermined distance so that the upper surface of the hatch cover 140 and the upper surface of the deck 20 may be flat. The support portion 130 may include a bracket 131 and a liner plate 132.

A plurality of brackets 131 may be installed on the inner wall 111 constituting the equipment accommodation space 110, and the liner plate 132 to be described later may be fixedly supported. The plurality of brackets 131 may be arranged along the inner wall 111 at regular intervals at the same height.

The liner plate 132 may be vertically installed from the inner wall 111 of the equipment receiving space 110 so as to mount an edge portion of the hatch cover 140 to be described later, As shown in FIG.

One end of the liner plate 132 forms the edge of the clear opening 122 and the other end can be fixed to the inner wall 111 of the equipment receiving space 110.

The liner plate 132 may be formed with a plurality of first insertion holes 133 at predetermined intervals so that the liner plate 132 can be engaged with the hatch cover 140 described later by the engaging portion 150 to be described later.

The liner plate 132 may be formed at the bottom of the drainage path 161 of the drainage unit 160 to be described later and may discharge water or a liquid material to the outside through the drainage pipe 163 of the drainage unit 160, At least one discharge hole 162 of the drainage unit 160 to be described later may be formed.

The hatch cover 140 is configured to shield the hatch 120 as well as the upper surface of which protrudes from the upper surface of the deck 20 so that the operator can safely work on the deck 20 The deck 20 can be formed flat to conform to the height of the deck 20 and can be configured to prevent deformation and self-deformation of the deck 20.

The hatch cover 140 includes a cover plate 141, a rim plate 142, stiffeners 143a, 143b and 143c, a pad plate 144, a lug 145, Lt; / RTI >

The cover plate 141 is formed by cutting the flat plate in a shape corresponding to the shape of the hatch 120. When the cover plate 141 is larger than the size of the deck opening 121, the cover plate 141 overlaps the upper surface of the deck 20, The height of the deck 20 may not be equal to the height of the deck 20 when the installation is completed.

The rim plate 142 and the stiffeners 143a, 143b, and 143c, which will be described later, can be fixedly installed at the lower portion of the cover plate 141, A pad plate 144 to be described later can be fixed to the edge portion so as to be coupled to the support portion 130 by a coupling portion 150 which will be partially overlapped with the support portion 132, A lug 145 may be provided at an upper portion thereof.

The rim plate 142 is provided on the lower surface of the cover plate 141 so as to provide a frame for fixing the end portions of the reinforcing members 143a, 143b, 143c described later while reinforcing the rigidity of the edge portions of the cover plate 141 And may be located a certain distance from the edge of the cover plate 141 so that the pad plate 144 to be described later can be installed.

The reinforcing members 143a, 143b and 143c are provided directly under the cover plate 141 on the inner side of the rim plate 142 so as to efficiently reinforce the overall rigidity of the cover plate 141 together with the rim plate 142 A transverse stiffener 143a fixed to the room, a longitudinal stiffener 143b, and an auxiliary stiffener 143c. Here, the term is a term indicating the direction of the drill, and when referring to the drill bit 1, the bell is the forward or aft direction of the drill bit 1, and the transverse direction can be the port or starboard direction of the drill bit 1 have.

A plurality of transverse stiffeners 143a are disposed in the longitudinal direction of the rim plate 142 in order to reinforce the lateral rigidity of the cover plate 141 so as to withstand the compressive load applied to the left or right of the drill string 1. [ Can be arranged and installed.

Each of the plurality of transverse stiffeners 143a is fixed to the lower surface of the cover plate 141, and one end and the other end of the transverse stiffener 143a can be fixedly connected to the rim plate 142.

In order to reinforce the longitudinal rigidity of the cover plate 141 so as to withstand the compressive load applied to the bow or stern of the drill string 1, a plurality of longitudinal stiffeners 143b are arranged in the lateral direction in the rim plate 142 Can be arranged and installed.

Each of the plurality of longitudinal stiffeners 143b is fixed to the lower surface of the cover plate 141 so as to intersect with the plurality of transverse stiffeners 143a while one end of the longitudinal stiffeners 143b at the outermost end is connected to the rim plate 142 And the other longitudinal stiffener 143b can be connected and fixed to the transverse stiffener 143a, which has one end and the other end neighboring the transverse stiffener 143a.

The auxiliary stiffener 143c is provided so as to reinforce the rigidity of the corner portion of the cover plate 141 so as to withstand the compressive load applied to the bow, stern, port, or starboard of the drill string 1, (143a) and the longitudinal stiffener (143b).

The stiffness of the cover plate 141 can be further increased as the plurality of transverse stiffeners 143a, the plurality of longitudinal stiffeners 143b and the plurality of auxiliary stiffeners 143c are installed as much as possible. However, 140, it is desirable to minimize the total weight of the stiffeners 143a, 143b, and 143c. In this embodiment, the stiffeners 143a, 143b, and 143c may be provided to differentiate according to the degree of buckling.

Specifically, in the present embodiment, a plurality of transverse stiffeners 143a and a plurality of longitudinal stiffeners 143b are provided so as to intersect with each other so that the density is high near the edge of the cover plate 141, which is relatively weak against the buckling phenomenon By providing a plurality of auxiliary stiffeners 143c in the vicinity of the edge of the cover plate 141 which is the weakest in the buckling phenomenon, The density can be made higher at the portion.

The pad plate 144 may be fixed to the edge of the cover plate 141 and concretely the lower surface of the cover plate 141 outside the rim plate 142. The pad plate 144 may be partially overlapped with the liner plate 132, The cover plate 141 can be extended to the outside by a predetermined length so that the cover plate 141 can be engaged with the support portion 130 by the engaging portion 150.

The pad plate 144 may be formed at the edge of the hatch cover 140 and may be mounted on the liner plate 132 so that the hatch cover 140 is engaged with the support portion 130 by the engaging portion 150, A plurality of second insertion holes 146 may be formed at predetermined intervals on the portion of the pad plate 144 extending outwardly by a predetermined length. The plurality of second insertion holes 146 may be formed to correspond to the plurality of first insertion holes 133 formed in the liner plate 132.

In addition, the pad plate 144 may form one side wall of the drainage passage 161 of the drainage section 160, which will be described later.

The lugs 145 may be formed on the cover plate 141. When the hatch cover 140 is conveyed by a conveying means such as a crane or a winch, a plurality of lugs 145 may be provided to maintain balance.

As shown in FIG. 8, the lug 145 may be formed as an eye plate having a recessed structure so that the upper surface of the hatch cover 140 may be flat.

The coupling part 150 may be composed of a packing 151 and a bolting member 152 so that watertightness can be achieved while the hatch cover 140 is fixedly coupled to the support part 130.

The packing 151 may be provided between the liner plate 132 of the support 130 and the pad plate 144 of the hatch cover 140 to prevent water from penetrating into the equipment accommodation space 110 have.

The packing 151 may be formed with a plurality of third insertion holes 153 at predetermined intervals so that the stud bolt 152a of the bolting member 152 to be described later can be inserted. The plurality of third insertion holes 153 may be formed to correspond to the plurality of first insertion holes 133 formed in the liner plate 132 and the plurality of second insertion holes 146 formed in the pad plate 144 have.

In addition, the packing 151 may form a side wall of the drainage passage 161 of the drainage section 160 to be described later together with the pad plate 144.

The bolt member 152 may be configured such that the pad plate 144 of the hatch cover 140 is seated on the liner plate 132 of the support portion 130 and then the hatch cover 140 and the support portion 130 are coupled And may be composed of, for example, a stud bolt 152a and a nut 152b.

The hatch cover 140 and the supporter 130 are inserted into the second insertion hole 146 of the pad plate 144 and the third insertion hole 146 of the packing 151 in a state where the liner plate 132 and the pad plate 144 are overlapped. The stud bolt 152a can be inserted through the first insertion hole 133 of the liner plate 132 and then fixed to the nut 152b by tightening.

When the hatch cover 140 is coupled and fixed on the support part 130, a gap 171 is formed between the cover plate 141 of the hatch cover 140 and the deck 20, 7, in order to prevent liquid substances such as water from penetrating into the equipment accommodating space 110 by such a gap 171, the discharge passage 161, the discharge hole 162, Drain pipe 163 as shown in FIG.

The drainage path 161 may be formed along the circumference of the gap 171 between the hatch cover 140 and the deck 20 or the periphery of the hatch cover 140 and the liner plate 132 of the support portion 130 may be formed on the bottom The pad plate 144 of the hatch cover 140 and the packing 151 of the engaging portion 150 constitute one side wall and the inner wall 111 of the equipment accommodating space 110 forms the other side wall, Can be provided.

At least one or more discharge holes 162 may be formed in a part of the liner plate 132 forming the bottom of the drainage passage 161 so that water or liquid substances accumulated in the drainage passage 161 can be discharged to the outside.

The drain pipe 163 may be configured such that one end is connected to the discharge hole 162 and the other end is connected to the outside.

As described above, in the present embodiment, the support portion 130 is installed on the inner wall 111 of the equipment accommodation space 110 where the hatch 120 is formed, and the cover plate 141 of the hatch cover 140 is mounted on the support portion 130 So that deformation of the deck 20 and deformation of the hatch cover 140 can be prevented and the height of the hatch cover 140 can be matched with the height of the deck 20 when the hatch cover 140 is installed.

Also, in the present embodiment, the stiffeners 143a, 143b, and 143c installed to prevent deformation of the cover plate 141 are provided to differentiate according to the degree of buckling, thereby reducing waste of the stiffener, Can be further prevented.

The present embodiment can prevent water from penetrating into the equipment accommodation space 110 by providing the drainage part 160 at the boundary between the deck 20 and the hatch cover 140. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

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 invention as defined by the appended claims.

1: Drill 10: Hull
20: Deck 100: Hatch structure
110: Equipment accommodation space 111: Inner wall
120: Hatch 121: Deck opening
122: clear aperture 130:
131: bracket 132: liner plate
133: first insertion hole 140: hatch cover
141: cover plate 142: rim plate
143a: transverse stiffener 143b: longitudinal stiffener
143c: auxiliary stiffener 144: pad plate
145: Lug 146: Second insertion hole
150: engaging portion 151: packing
152: bolt member 152a: stud bolt
152b: nut 153: third insert hole
160: Drain portion 161: Drain
162: Exhaust hole 163: Drain pipe
171: Niche

Claims (12)

A hatch opening the deck on the equipment accommodation space;
A support portion installed on an inner wall of the equipment accommodating space along a periphery of the hatch; And
And a hatch cover coupled to the support to shield the hatch,
Wherein the upper surface of the hatch cover is flush with the upper surface of the deck so that the support portion is located a certain distance below the upper portion of the inner wall. The apparatus according to claim 1,
A plurality of brackets disposed at predetermined intervals on the inner wall; And
And a liner plate fixed to the upper surface of the plurality of brackets and having a plurality of first insertion holes. The hatch cover according to claim 2,
A cover plate having a shape corresponding to the shape of the hatch and formed at a size smaller than the size of the hatch;
A rim plate positioned inside the cover plate at a predetermined distance from the edge of the cover plate and fixed to the lower surface of the cover plate; And
And a plurality of second insertion holes which are fixed to the lower surface of the cover plate and the side surface of the rim plate and which are located on the lower surface of the cover plate outside the rim plate, And a pad plate formed on the hatch structure. The hatch cover according to claim 3,
And a reinforcing member fixedly installed on a lower surface of the cover plate at an inner side of the rim plate. The stiffener according to claim 4,
A plurality of longitudinal stiffeners arranged in the longitudinal direction so as to reinforce lateral rigidity of the cover plate; And
And a longitudinal stiffener in which a plurality of longitudinal stiffeners are arranged laterally so as to reinforce the longitudinal stiffness of the cover plate. 6. The straddle-type vehicle according to claim 5, wherein the plurality of transverse stiffeners and the plurality of longitudinal stiffeners
Wherein the cover plate is installed so as to intersect with the center of the cover plate so that the density is high near the edge of the cover plate which is relatively vulnerable to the buckling phenomenon and the density is low at the central portion of the cover plate, . 6. The straddle-type vehicle according to claim 5,
Further comprising a plurality of auxiliary stiffeners installed between the longitudinal stiffener and the transverse stiffener which are installed in the vicinity of the edge of the cover plate so as to reinforce the rigidity of the corner portion of the cover plate. The hatch cover according to claim 3,
Further comprising a plurality of lugs mounted on the cover plate for transfer,
Preferably,
Wherein the hatch cover is formed of an eye plate having a concave structure so that the top surface of the hatch cover can be flat. The method of claim 3,
And a coupling portion for coupling the hatch cover and the support portion to each other,
The coupling portion
A packing provided between the liner plate of the support part and the pad plate of the hatch cover and having a plurality of third insertion holes; And
And a bolting member for coupling and fixing the hatch cover and the support portion. 10. The bending machine according to claim 9,
Comprising a stud bolt and a nut,
Wherein the stud bolt is inserted through the first through third insertion holes to connect and fix the hatch cover and the support portion. 10. The method of claim 9,
Further comprising a drain portion formed between the hatch cover and the deck,
The drainage section
Wherein the liner plate of the support portion is formed on the bottom of the hatch cover, the pad plate of the hatch cover and the packing of the coupling portion form one side wall, ;
An exhaust hole formed in at least one portion of the liner plate forming the bottom of the drainage passage; And
And a drain pipe having one end connected to the exhaust hole and the other end connected to the outside. A drill rig with a hatch structure according to any one of the preceding claims.

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