KR20160023046A - Catamaran type drilling ship and hull structure of the drilling ship - Google Patents

Abstract

The present invention relates to a catamaran type drilling ship and a hull structure thereof, which reduce wave making resistance and have excellent friction resistance by arranging a catamaran type hull in the stern part of a hull of the drilling ship, and enables the easy arrangement of drilling equipment in a deck and improves drilling efficiency by supplying and forming a riser and a drill pipe in both sides of the hull to efficiently design the size of the deck of the drilling ship.

Description

[0001] CATAMARAN TYPE DRILLING SHIP AND HULL STRUCTURE OF THE DRILLING SHIP [0002]

The present invention relates to a hull structure of a twin drill ship and its twin drill ship, more specifically, a twin hull structure is disposed at a stern portion of a drill ship hull, thereby reducing the resistance to wave and improving frictional resistance. The present invention relates to a hull structure of a twin drilling rig and a twin drilling rig which are advantageous in designing a deck size of a drilling rig by being configured to supply a drill pipe so that drilling equipment can be easily placed on a deck and drilling efficiency can be improved.

Along with the development of submarine mining techniques, drilling lines have been developed with drilling facilities suitable for marginal field or deep-sea oil field development.

Rig seam or rigid platform is mainly used for seabed drilling, which can be sailed only by other tugboats, and is used for drilling underwater with anchorage at one point of the sea using a mooring device. Recently, A so-called drillship, which is manufactured in the same form as a general ship, has been developed and installed in underwater drilling.

In order to develop small-scale oilfields, these drillships are constructed so that they can navigate with their own power without a tugboat, depending on the working conditions that need to be moved frequently.

Marine structures such as drill rigs and drill rigs are equipped with a Moonpool for passing various equipment for drilling operations.

The portal is a hollow rectangular parallelepiped or cylindrical structure formed to penetrate vertically between the upper deck and the bottom of the offshore structure.

The drilling line must be moored over the seawater for drilling. If a fresh water or a wave is generated due to weather or environmental reasons, the movement performance of the hull is lowered and the mooring becomes difficult and the drilling operation can not be performed. Excessive energy may be consumed in the dynamic position (DP) for mooring.

On the other hand, a catamaran is a ship in which two hulls share a relatively small displacement, and the two hulls are connected to each other by a deck or other structure. When the required displacement is divided into twin pairs, the hull resistance is reduced because each hull becomes thinner. The total flooded surface area of glass and two hulls is increased, which is disadvantageous to frictional resistance.

The present applicant has filed a patent application for a catamaran-type drill ship (Korean Patent Publication No. 20-2013-0005758).

Conventional catamaran drill rigs filed by the present applicant have a hull portion formed with a door pool and one side and the other side projecting downward with respect to the center of the portal.

However, conventionally, the catamaran type drilling rig is disadvantageous in designing the deck size of the drilling rig, and therefore it is not easy to arrange the drilling equipment on the deck, and drilling operation can not be efficiently performed.

Korean Patent Publication No. 20-2013-0005758 Korean Patent No. 10-2005-0106896

In order to solve the above-mentioned problems, the present invention is characterized in that the twin stranded body is disposed on the stern portion of the drill ship hull, thereby reducing the wave resistance and the frictional resistance, as well as providing a drill floor on the upper part of the catamaran body, The structure for supplying the riser and the drill pipe from both sides of the floor in the direction of the hull forward direction is advantageous in designing the size of the deck of the drill ship to facilitate the placement of the drilling equipment on the deck, The purpose of the present invention is to provide a hull structure of a binary drill ship.

In order to achieve the above object, the present invention provides a catamaran, a drill floor is provided on the upper part of the catamaran body, and a drill floor is provided with a pair of drill rigs on which a derrick is installed.

If the ship hull is divided into a bow portion and a stern portion, the hull is arranged on the aft portion.

A door pool having a stern is opened at the stern portion, and the door pool is formed along the longitudinal direction of the drill ship hull.

And the door frame is disposed on the center line of the drill ship hull.

On the basis of the drill floor, a riser deck is disposed on one of the coaxial ship and a drill feed deck is provided on the other coaxial ship.

A riser stanchion for mounting a riser is installed on one side of the upper surface of the riser deck, and a catwalk for transporting the riser to the drill floor is installed on the upper side of the riser deck.

A drill pipe stent for mounting a drill pipe is installed on one side of the upper surface of the drill pipe deck, and a catwalk for transferring a drill pipe to the drill floor is installed on the other side of the upper surface of the drill pipe deck.

The stern part may be provided with a blocking unit for selectively closing the door frame.

Meanwhile, in the hull structure of the twin drill rig according to the present invention, the twin hull structure is disposed at the stern portion of the drill hull.

A drill floor is installed on the upper part of the catamaran body, and a derrick is installed on the drill floor.

A door pool having an open stern is formed on the stern portion, and the door pool is formed along the longitudinal direction of the rigid ship hull.

INDUSTRIAL APPLICABILITY As described above, the present invention improves speed by reducing the resistance of fresh water and waves, improves safety by reducing rolling, improves deck efficiency, and improves drilling efficiency.

In addition, the present invention is configured to provide a drill floor at the top of the catamaran body, a derrick at the drill floor, and a riser and drill pipe at both sides of the drill floor to feed the riser and drill pipe, It is easy to place the drilling equipment on the deck.

It is also possible for the present invention to mount more bulky and heavy equipment, including derrick, on the deck compared to the prior art.

In addition, the present invention can drastically reduce the amount of fuel consumed in dynamic positions (DP) for drilling rigs in drilling operation, in the marine environment such as fresh water and waves.

1 is a plan view showing a twin drill ship and a hull structure according to a first embodiment of the present invention;
FIG. 2 is a rear view showing a twin drill ship and a hull structure according to the first embodiment of the present invention. FIG.
3 is a plan view showing a twin drill ship and a hull structure according to a second embodiment of the present invention.
FIG. 4 is a rear view showing a twin drill ship and a hull structure according to a second embodiment of the present invention. FIG.
5 is a plan view showing a twin drill ship and hull structure according to a third embodiment of the present invention.
6 is a rear view showing a twin drill ship and hull structure according to a third embodiment of the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

FIG. 1 is a plan view showing a twin drill ship and a hull structure according to a first embodiment of the present invention, and FIG. 2 is a rear view showing a twin drill ship and a hull structure according to the first embodiment of the present invention.

As shown in Figs. 1 and 2, the twin drill ship 100 and the hull structure according to the first embodiment of the present invention, when the drill ship hull 101 is divided into a bow portion and a stern portion, And the catamaran body 103 is disposed at the stern portion of the body 101.

The total length ratio of the bow portion and the stern portion can be set to 1: 1.

A drill floor 110 is installed on the upper part of the hull structure 103 and a derrick 120 is installed on the drill floor 110.

A stern 130 is formed at the stern portion and the stencil 130 is formed along the longitudinal direction of the drill ship hull 101. The portal 130 is disposed at the center line L of the drill ship hull 101.

The width of the hatchery 130 and the width of the hatchery 103 may be set to 1: 1.5 or 1: 1.

In the twin drill ship 100 and the hull structure according to the first embodiment of the present invention constructed as described above, the hull structure of the rigid ship hull 101 is disposed at the stern portion, thereby reducing the resistance of the tide and the waves, , The rolling is reduced, the safety is excellent, the deck efficiency is improved, and the drilling efficiency can be increased.

In addition, the present invention is configured to provide a drill floor at the top of the catamaran body, a derrick at the drill floor, and a riser and drill pipe at both sides of the drill floor to feed the riser and drill pipe, It is easy to place the drilling equipment on the deck.

Further, the present invention makes it possible to install a large number of bulky and heavy equipment including decks in the deck.

In addition, the present invention can drastically reduce the amount of fuel consumed in dynamic positions (DP) for drilling rigs in drilling operation, in the marine environment such as fresh water and waves.

FIG. 3 is a plan view showing a structure of a twin drill ship and a hull structure according to a second embodiment of the present invention, and FIG. 4 is a rear view illustrating a twin drill ship and a hull structure according to a second embodiment of the present invention.

As shown in FIGS. 3 and 4, in the hull structure of the twin drill ship 200 and the hull structure according to the second embodiment of the present invention, the hull structure 203 is disposed at the stern portion of the drill ship hull 201.

A drill floor 210 is installed on the upper part of the hull 205 and a derrick 220 is installed on the drill floor 210.

A stern 230 is formed on the stern portion and the stern 230 is formed along the longitudinal direction of the stern hull 201. The door frame 230 is disposed at the center line L of the drill ship hull 201.

On the basis of the drill floor 210, a riser deck 240 is disposed on an upper portion of one of the hulls of the hull, and a drill pipe deck 250 is installed on an upper portion of the other hull.

A riser stanchion 241 for loading a riser R is installed on one side of the upper surface of the riser deck 240 and a riser R is installed on the other side of the upper surface of the riser deck 240 on the drill floor 10 And a catwalk 242 for transporting the catwalk 242 is installed.

A drill pipe stent 251 for mounting a drill pipe D is installed on one side of the upper surface of the drill pipe deck 250 and a drill pipe is installed on the other side of the upper surface of the drill pipe deck 250, A catwalk 252 for transporting the catwalk 252 is installed.

In the twin drilling rig 200 and the hull structure according to the second embodiment of the present invention constructed as described above, the riser R loaded on the riser stanchion 241 is carried by the catwalk 242, The riser R is conveyed toward the door frame 230 using an existing conveyor.

The drill pipe D loaded on the drill pipe stent 251 is transported to the catwalk 252 and the drill pipe D is transported toward the platform 230 using an existing conveyor not shown.

As described above, according to the second embodiment of the present invention, the structure in which the riser R and the drill pipe D are fed in the width direction (positive direction) of the drill ship hull 201 The structural stability of the hull can be improved by enlarging the size in the width direction as compared with the longitudinal direction of the drill ship hull 201. [

FIG. 5 is a plan view showing a structure of a twin drill ship and a hull structure according to a third embodiment of the present invention, and FIG. 6 is a rear view illustrating a twin drill ship and a hull structure according to a third embodiment of the present invention.

As shown in FIGS. 5 and 6, in the hull structure of the twin drill ship 300 and the hull structure according to the third embodiment of the present invention, the hull structure 303 is disposed at the stern portion of the drill ship hull 301.

A drill floor 310 is installed on the upper part of the hull 305 and a derrick 320 is installed on the drill floor 310.

A stern 330 is formed at the stern portion and the stern 330 is formed along the longitudinal direction of the stern hull 301.

The door frame 330 is disposed on the center line L of the drill ship hull 301. The stern part may be provided with a blocking unit 340 for selectively closing the door frame 330.

The blocking unit 340 includes a driving motor 341 and a blocking plate 342 that is automatically slid by the driving motor 341, though not shown in the figure.

According to the third embodiment of the present invention constructed as described above, when the drilling operation is performed, the blocking unit 340 blocks the door 33 in a slidable manner during the drilling operation, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that the present invention, Various modifications and variations are possible within the scope of the claims. For example, the blocking plate can be of a sliding structure as well as a pivoting structure, and the ratio of the total length of the bow portion and the stern portion can be changed according to the design conditions.

100: Twin drilling rig
101: Sailing ship hull
103: Catamaran
110: Drill Floor
120: Derrick
130:
200: Twin drilling rig
240: Riser deck
241: riser stencil
242: Catwalk
250: Drill pipe deck
251: Drill pipe stencil
252: Catwalk
300: Twin drilling rig
340:
341: Driving motor
342:
D: Drill pipe
L: Center line
R: riser

Claims (12)

A twin drilling rig having a catamaran body, a drill floor disposed above the catamaran body, and a derrick mounted on the drill floor. The method according to claim 1,
Wherein the hull is divided into a bow portion and a stern portion, and the hull is disposed on the stern portion. The method of claim 2,
And a door pool having an open stern is formed on the stern portion. The method of claim 3,
Wherein the door handle is formed along a longitudinal direction of the drill ship hull. The method of claim 4,
Wherein the door handle is disposed at a center line of the drill ship hull. The method according to claim 1,
Wherein a riser deck is disposed on one of the coaxial ships and a drill feed deck is provided on the other coaxial ship based on the drill floor. The method of claim 6,
Wherein a riser stanchion for loading a riser is provided on one side of the upper surface of the riser deck, and a catwalk for transferring a riser to the drill floor is installed on the other side of the upper surface of the riser deck. The method of claim 6,
A drill pipe stanchion for mounting a drill pipe is installed on one side of an upper surface of the drill pipe deck and a catwalk for transferring a drill pipe to the drill floor is installed on the other side of the upper surface of the drill pipe deck. The drill ship. The method of claim 3,
Wherein the stern portion is provided with a blocking unit for selectively closing the door frame. Hull structure of a twin drilling rig in which a catamaran is placed at the stern part of the ship hull. The method of claim 10,
Characterized in that a drill floor is provided on the upper part of the hull, and a derrick is provided on the drill floor. The method according to claim 10 or 11,
Wherein a door pool having a stern is opened on the stern portion, and the door pool is formed along the longitudinal direction of the drill ship hull.

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