KR101713855B1 - Drillingship having a hatch cover - Google Patents

Abstract

The drill line is started. The drill rig according to the present invention comprises: a loading space part provided between an upper deck and a bottom part of a hull and in which a drilling pipe is horizontally or vertically stacked; A hatch cover which is provided in the loading space portion and on which a pipe for drilling is additionally loaded; And a drilling pipe support provided on the upper deck for supporting the drilling pipe loaded on the hatch cover.

Description

{DRILLINGSHIP HAVING A HATCH COVER} < / RTI >

The present invention relates to a drill ship, and more particularly, to a drill ship capable of loading a drilling pipe in a lower space of an upper deck and in addition to a hatch cover for sealing a lower space.

With the rapid development of international industrialization and industry, the use of earth resources such as oil is gradually increasing, and thus the stable production and supply of crude oil is becoming an increasingly important issue globally.

For this reason, recently marginal field or deep-sea oil development has been economically feasible, which has been neglected due to economic difficulties so far. Therefore, with the development of submarine mining technology, drilling facilities suitable for the development of such oilfields A drilling rig equipped with a hull has been developed.

Conventional submarine drilling has been mainly used for a rig ship or a fixed platform for underwater drilling, which can be sailed only by other tugboats and for submarine drilling under anchorage at one point of the sea using a mooring device.

In recent years, however, drill ships and FPSO (Floating, Production, Storage and Offloading), which are manufactured in the same form as ordinary ships, have been developed to mount advanced drilling equipment and to navigate with their own power. Has been used for subsea drilling and production.

In order to develop small-scale oilfields, drilling rigs are designed to be able to navigate powerlessly without a tugboat, depending on the working conditions that need to be moved frequently.

1 is a schematic view of a drill ship according to an embodiment of the prior art.

As shown in FIG. 1, a riser pipe (RP) rack, which is a space in which a riser pipe is loaded, is provided at a stern portion of the hull. Since the riser pipe rack is vertically erected and loaded, the riser pipe (RP) rack is recessed from the upper deck toward the bottom.

Since this riser pipe rack is not provided with a cover, the riser pipe rack is provided as a large water immersion space having an opening in the center of the hull, which is disadvantageous in terms of freeboard (free buoyancy) calculation.

Also, the riser pipe is vertically mounted on the riser pipe rack, so it is projected to the top of the upper deck after it is loaded. Therefore, the riser pipe rack can not be loaded with other drilling equipment other than the riser pipe, resulting in lower space efficiency.

On the other hand, a prior art in which a riser pipe is loaded between an upper deck and a bottom of a drill ship is disclosed in Korean Patent Laid-Open Publication No. 10-2010-0121403 (Nov. 17, 2010). In the above-described prior art, a hatch cover is provided on an upper portion of a space portion where a riser pipe is accommodated, and an upper portion of the hatch cover is utilized as a space like an upper deck.

In the above-described prior art, since all of the riser pipes previously mounted on the upper deck are loaded in the lower space of the upper deck, a space is required to be able to load all of the riser pipes between the upper deck and the bottom.

In this case, since a separate space is provided in addition to the moonpool, two large space portions are provided in the hull, and the longitudinal strength is weakened.

Korean Patent Publication No. 2010-0121403 (Daewoo Shipbuilding & Marine Engineering) 2010.11.17

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a hull structure for a hull, And to provide a drill rig capable of improving the accuracy.

According to an aspect of the present invention, there is provided a hull structure comprising: a loading space portion provided between an upper deck and a bottom of a hull and in which a drilling pipe is horizontally or vertically stacked; A hatch cover provided in the loading space portion and to which the drilling pipe is further loaded; And a drill pipe support provided on the upper deck to support a drill pipe mounted on the hatch cover.

Wherein the drilling pipe support portion includes a plurality of supports provided on the upper deck of the peripheral region of the hatch cover in the width direction or the longitudinal direction of the hull; And a plurality of support rods provided on the plurality of support rods and supporting the drilling pipe mounted on the outermost periphery of the hatch cover.

The plurality of support rods may have a length of one side contacting the drilling pipe shorter than a length of the other side contacting the plurality of supports, and the one side may be rounded to correspond to the outer circumferential surface of the drilling pipe.

The drilling pipe support part may further include a gap filling member provided between the plurality of drilling pipes mounted on the hatch cover to fill uneven gaps between the drilling pipes.

And a plurality of cutting grooves corresponding to the outer circumferential surface of the drilling pipe may be provided on an outer circumferential surface of the gap filling member.

Wherein the hatch cover comprises: a body on which the drilling pipe is mounted on an upper surface portion; And a fastening rod provided on the main body and coupling the main body to the upper deck.

The fastening rod is provided with a fastening hole, and the main body can be detachably coupled by bolts coupled to the upper deck through the fastening holes.

The upper deck may be provided with a support frame having a screw groove to which the bolt is coupled, and the support frame may be provided with a scallop on which a retaining groove provided on the retaining rod is engaged.

The main body may be provided with a plurality of reinforcing members serving also as a pipe rack function at the upper portion of the plate material.

The plurality of hatch covers may be provided, and a plurality of the hatch covers may be provided with a drill pipe or a riser pipe.

The hatch cover may be weather tight or water tight.

The drilling pipe mounted on the hatch cover can be horizontally stacked along the width direction of the hull.

The drilling pipe mounted on the hatch cover can be horizontally stacked along the longitudinal direction of the hull.

And a door-type crane provided on the upper deck for loading and unloading the drilling pipe.

The gate type crane can be moved to the forward portion or the stern portion along the longitudinal direction of the hull.

The drill rig is a drill ship or semi-submerged rig, and the drill pipe may include at least one of a drill pipe and a riser pipe.

According to another aspect of the present invention, there is provided a drilling rig, wherein a loading space in which a pipe for drilling is vertically or horizontally loaded is provided in a space below an upper deck of the hull, a hatch cover is provided on an upper portion of the loading space, The drill pipe is further loaded on the hatch cover, and the hatch cover is provided with a plurality of reinforcing members.

The space in which the drilling pipe is loaded may be located at either a bow or stern relative to the drilling column.

According to still another aspect of the present invention, in a drill ship in which a residence sphere is disposed in a bow, a space in which the drilling pipe is stacked on the upper deck is located at only one of a bow or a stern relative to the drilling column May be provided.

Embodiments of the present invention can easily secure a buoyancy force associated with the freeboard calculation by sealing the load space portion provided between the upper deck and the bottom portion and the load space where the drill pipe is loaded with the hatch cover.

Also, since the pipe for drilling can be mounted on the hatch cover covering the loading space, the strength of the longitudinal strength of the hull can be improved by minimizing the loading space.

Particularly in the case of a drill ship, the space for loading the drilling pipe on one side of the derrick can be changed to one side of the former derrick to one side of the derrick, reducing the number of equipment for pipe transportation by half .

By arranging the door type crane that moves the drilling pipe in the longitudinal direction of the hull, it is possible to eliminate the surrounding structure, especially the interference with the catwalk.

Since the pipe for drilling is loaded in the inner space of the hull, the center of gravity of the drill ship can be lowered, which increases the stability when moving.

1 is a plan view schematically showing a drill-hole in an embodiment of the prior art.
2 is a side view schematically showing a drill ship as an example of a drill rig according to an embodiment of the present invention.
Figure 3 is a schematic plan view of the drill ship shown in Figure 2;
Figure 4 is a schematic front view of the drill ship shown in Figure 2;
5 is a front view showing the hatch cover shown in Fig.
Fig. 6 is an enlarged view of the "A" area in Fig.
7 is a cross-sectional view taken along the line VII-VII in FIG.
7 is a cross-sectional view taken along the line VII-VII in FIG.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 2 is a side view schematically showing a drill ship according to an embodiment of the present invention, FIG. 3 is a schematic plan view of the drill ship shown in FIG. 2, 5 is a front view showing the hatch cover shown in Fig. 4, Fig. 6 is an enlarged view of the "A" area of Fig. 4, and Fig. 7 is a sectional view taken along the line VII- Fig.

As shown in these drawings, the drill rig 1 according to the present embodiment includes a loading space part 100 provided between the upper deck UD of the hull and the bottom of the hull and in which the drilling pipe is horizontally or vertically stacked, A hatch cover 200 provided in the loading space part 100 and on which a drilling pipe is further loaded and a drilling pipe support 200 installed on the upper deck UD and supporting a drilling pipe loaded on the hatch cover 200. [ (300), and a door-type crane (400) provided on the upper deck (UD) for loading and unloading a pipe for drilling.

As shown in FIG. 2, the loading space portion 100 is provided between the upper deck UD and the bottom of the loading space portion 100, and a drilling pipe is loaded in the loading space portion 100.

The present embodiment can easily secure the buoyant force associated with the freeboard estimation by covering the loading space portion 100 with the hatch cover 200 described later and blocking the large flooding space beforehand.

In addition, the present embodiment can load the drilling pipe on the hatch cover 200 provided on the upper part of the loading space part 100, thereby increasing the utilization of the loading space part 100. Further, as will be described in detail below, the volume of the loading space 100 can be reduced by the volume of the drilling pipe loaded on the hatch cover 200, and the longitudinal strength of the hull can be improved.

2, the loading space portion 100 may be provided in two rows in the longitudinal direction of the hull and may be provided in two rows in the width direction of the hull. have.

 In this embodiment, the loading space 100 can be vertically or horizontally loaded with drilling pipes, and as shown in FIG. 4, for example, a plurality of vertical loading drilling pipes 110 can be stacked vertically have.

4, the inside of the loading space part 100 may be divided into two spaces in the width direction of the ship by partition walls 120 provided at the central part. In this embodiment, the drilling pipe may include both the riser pipe RP and the drill pipe DP. The above-mentioned vertical load drilling pipe 110 may be a riser pipe (RP) or a drill pipe (DP).

4, the hatch cover 200 covers the upper portion of the loading space portion 100 to prevent the loading space portion 100 from being submerged, and is also provided as a loading place for the drilling pipe.

5, the hatch cover 200 includes a main body 210 on which a drilling pipe is mounted on an upper surface portion, a main body 210 provided on the main body 210 to support the main body 210 on the upper deck UD, (Not shown).

5, the main body 210 of the hatch cover 200 may have a rectangular cross-sectional shape. In this embodiment, since a plurality of drilling pipes are loaded on the main body 210, , As shown in FIG. 4, a plurality of reinforcing members 211 may be provided.

The reinforcing member 211 may be an I-shaped or T-shaped beam that is provided inside the main body 210 and supports the inner ceiling portion of the main body 210.

The coupling rods 220 of the hatch cover 200 serve to detachably connect the main body 210 to the support frame 500 provided on the upper deck UD or the partition 120.

5 and 6, the fastening rod 220 may be provided at the edge of the body 210 in the width direction, and the fastening rod 220 may be fastened with a bolt B A hole 221 is provided. 6, the fastening rod 220 is provided with a latching groove 222 which is engaged with a scallop 510 provided on the support frame 500. As shown in FIG.

4, a pair of hatch covers 200 may be provided in the width direction of the hull to cover the loading space portion 100 partitioned into two space portions by the partition wall 120 have.

In this embodiment, a drill pipe DP can be mounted on one side of the hatch cover 200, and a riser pipe RP can be mounted on the other side.

Looking at the drilling process in the ocean, drilling a hole in the sea floor with a drill pipe (DP) to a certain depth first. This constant depth does not require a riser pipe (RP) because it is drilling depth without using a mud, and when drilling deeper than a certain depth, the drill bit and the hole of the mud Because the circulation is necessary, a riser pipe (RP) must be installed.

Therefore, in the present embodiment, the number of the drill pipes DP required for drilling without the riser pipe RP can be loaded on one side of the hatch cover 200, and the riser pipe RP can be loaded on the other side .

As a result, the hatch cover 200 for lifting the riser pipe RP and the drill pipe DP, which are stacked in the loading space portion 100, to the upper deck UD, There is an advantage in that it is possible to reduce the work flow required for clearing the work area.

The drilling pipe support part 300 supports the plurality of drilling pipes mounted on the upper surface of the hatch cover 200 so as not to collapse in the width direction of the hull.

4, the drill pipe support 300 includes a plurality of supports 310 provided on the upper deck UD of the peripheral region of the hatch cover 200 in the width direction of the hull, A plurality of support rods 320 provided on the plurality of support rods 310 to support a drilling pipe mounted on an outermost periphery of the hatch cover 200 and a plurality of supporting rods 320 supported between the plurality of drilling pipes mounted on the hatch cover 200 And a gap filling member 330 for filling a non-uniform gap between the drilling pipes.

The plurality of support rods 310 may be provided in the upper deck UD adjacent to the outermost edge of the hatch cover 200 as shown in Figure 4 even when only one hatch cover 200 is provided, As shown in FIG.

In this embodiment, the plurality of supports 310 may be bolted or welded to the upper surface of the upper deck UD.

4, a plurality of support rods 320 are provided on the inner side surfaces of the plurality of support rods 310 and connected to the riser pipe RP or the drill pipe DP, which are mounted on the outermost periphery of the hatch cover 200, As well.

4, the plurality of support rods 320 may be provided so that the length of one side contacting the riser pipe RP is shorter than the length of the other side contacting the plurality of support rods 310 have.

The outer circumferential surface of the support rod 320 in contact with the riser pipe RP may be subjected to a rounding treatment as shown in Fig. 4 to increase the contact area with the riser pipe RP.

4, when the plurality of riser pipes RP are mounted on the hatch cover 200, the gap filling member 330 is formed so that the plurality of riser pipes RP do not contact with each other, And serves to stably support the riser pipe (RP).

In the present embodiment, a plurality of gap filling members 330 may be provided, and a plurality of cutout grooves 330a may be formed on the outer circumferential surface of the gap filling member 330 to increase the contact area with the riser pipe RP.

In this embodiment, the gap filling member 330 can be applied even when a plurality of drill pipes DP are loaded.

As shown in FIG. 3, the gantry crane 400 is provided movably on the upper deck UD to take out the drilling pipe loaded on the loading space 100 or the hatch cover 200, And serves to load the drilling pipe to the loading space portion 100 or the hatch cover 200. [

3, the rail 410 supporting the door-type crane 400 may be provided from the central portion to the stern portion of the hull, and a pair may be provided at the widthwise edges of the hull .

The present embodiment is characterized in that the drilling pipe is placed on the rear side of the drilling column 600 on one side of the drilling column 600, for example, as shown in Fig. 2, So that the number of equipment for transporting the pipe for drilling can be reduced to half.

In addition, in the present embodiment, as shown in FIG. 2, the residence port (L / Q) has an advantage in that it can be aligned with the longitude center of gravity of the ship.

As described above, according to the present embodiment, it is possible to easily secure the buoyant force associated with the freeboard calculation by sealing the loading space portion provided between the upper deck and the bottom of the lower deck and the drill pipe with the hatch cover.

Also, since the pipe for drilling can be mounted on the hatch cover covering the loading space, the strength of the longitudinal strength of the hull can be improved by minimizing the loading space.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

1: drilling line 100:
110: pipe for vertical stacking drilling 120: partition wall
200: Hatch cover 210: Body (plate)
211: reinforcement member 220: fastening rod 300: pipe support for drilling
310: support rod 320: support rod
330: gap filling member 400: door type crane
410: rail 500: support frame
510: Scallop 600: Drill tower
B: bolt DP: drill pipe
RP: riser pipe UD: upper deck
L / Q: Residents

Claims (19)

A loading space provided between the upper deck and the bottom of the hull and in which the drilling pipe is horizontally or vertically stacked;
A hatch cover provided in the loading space portion and to which the drilling pipe is further loaded; And
And a drilling pipe support portion provided on the upper deck for supporting a drilling pipe mounted on the hatch cover,
The hatch cover
A main body on which the drilling pipe is mounted on an upper surface portion; And
And a fastening rod provided on the main body and coupling the main body to the upper deck,
The main body is characterized in that a plurality of reinforcing members serving also as a pipe rack function are located on the upper portion of the plate material,
The drilling pipe support portion includes:
A plurality of supports provided on the upper deck of the peripheral region of the hatch cover in the width direction or the longitudinal direction of the hull; And
And a plurality of support rods provided on the plurality of supports for supporting the drilling pipe loaded on the outermost periphery of the hatch cover,
Wherein the plurality of support rods are provided such that a length of one side contacting the drilling pipe is shorter than a length of the other side contacting the plurality of supports,
Wherein the one side portion is rounded to correspond to an outer circumferential surface of the drilling pipe. delete delete The method according to claim 1,
The drilling pipe support portion includes:
And a gap filling member provided between a plurality of the drilling pipes loaded on the hatch cover to fill uneven gaps between the drilling pipes. The method of claim 4,
And a plurality of cutting grooves corresponding to the outer circumferential surface of the drilling pipe are provided on an outer circumferential surface of the gap filling member. delete The method according to claim 1,
The fastening rod is provided with a fastening hole,
And the main body is detachably coupled by bolts coupled to the upper deck through the fastening holes. The method of claim 7,
Wherein the upper deck is provided with a support frame having a screw groove to which the bolt is coupled,
Wherein the support frame is provided with a scallop on which a retaining groove provided on the fastening rod is engaged. delete delete delete delete delete delete delete delete delete delete delete

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