KR20100131098A - Structure for prevention collision transport structures and moon-pool - Google Patents

Abstract

PURPOSE: A structure for preventing a collision between a moon pool of a ship and a transport structure is provided to prevent damage to a transport structure by installing a support unit in the bottom of a moon pool. CONSTITUTION: A structure for preventing a collision between a moon pool of a ship and a transport structure comprises hanging units(122) and support units. The hanging units are formed in the bottom of a transport structure(120). The support units are connected to the hanging units and support the transport structure. The support units have wires(132,142). The wires are wound and unwound using winding units(140) and are directly connected to the hanging units.

Description

Anti-collision structure between ship's door pool and transport structure {STRUCTURE FOR PREVENTION COLLISION TRANSPORT STRUCTURES AND MOON-POOL}

The present invention relates to a collision avoidance structure between a door pool of a ship and a transport structure, and more particularly, a transport structure of a remote operator vehicle (ROV), in which a sampling operation is performed, is severe during recovery through a moon-pool. The present invention relates to an anti-collision structure between a ship's door pool and a transport structure that can safely recover the transport structure without collision with the door pool even under the movement of marine conditions.

As industrial and industrial development in the world develops, the use of oil and natural gas increases, and as a result, the development of marginal or deep sea oil fields, which have been neglected due to lack of economy, has become economical. With the development of technology, drilling vessels equipped with drilling facilities for developing such oil fields have been developed in various forms.

In the conventional subsea drilling, a rig ship or a fixed platform exclusively used for subsea drilling, which can be sailed only by other tugboats and is anchored at one point of the sea using a mooring device, is mainly used. Recently, the so-called Floating Production Storage and Off-loading (FPSO) has been developed and used for offshore drilling, which is equipped with advanced drilling equipment and can be sailed on its own power.

These drilling vessels form a vertically penetrating moon-pool at the center to drive the drilling pipe down to the sea floor.

Moonpool is an indispensable structure in terms of drilling vessel use, but it is very disadvantageous in terms of anchoring, navigation stability and navigation performance.

In other words, due to the sloshing phenomenon caused by the relative flow of seawater flowing into the door pool and external seawater, the resistance increase, the speed decrease, the required horsepower increase, the fuel consumption increase, and the damage to the hull of the drilling ship And the like.

Furthermore, the ship's flow is controlled by the sea conditions in the process of receiving the transport structure of the robot arm-mounted remote operator vehicle (ROV) depending on one wire of the crane for sampling or drilling work through the door pool. If severe, the transport structure hit the wall surface of the door pool had a problem that is broken.

The present invention has been invented to solve the above problems, the object is to provide a support means connectable to the lower side of the transport structure on the lower side of the door pool, even in the movement of the vessel during the recovery of the transport structure through the door pool It is to provide a collision prevention structure between the ship's door pool and the transport structure that can support the structure and move at the same time to prevent the collision to the door pool.

In order to achieve the above object, according to the present invention, at least one hanger formed on the lower side of the conveying structure and, unwinding in the winding portion so as to support the conveying structure that is connected to each hanger hanging on the crane hanging through the door pull And it provides a collision avoidance structure of the ship's door pool and the carrying structure including a support means provided with a wire to be made.

And it can be installed on the carrying structure to directly connect the wire to the hook through the remotely controlled robot arm.

In addition, the winding unit is provided with a motor to enable automatic loosening and winding, and the driving of the motor can be adjusted automatically by the control unit.

Further, by controlling the motor through the control unit, the wire is released to be slower than the rising speed or the rising speed when the carrying structure is raised, and the winding is faster than the falling speed or the falling speed when the carrying structure is lowered. You can do that.

Moreover, in case of an emergency, the wires can be stopped and locked through the control unit.

According to the anti-collision structure between the door pool and the transport structure of the ship of the present invention, by carrying a support means on the lower side of the door pool that can stably support the transport structure even in the movement of the vessel at the time of recovery of the transport structure through the door pool, Has a very useful effect to prevent breakage of the structure.

Hereinafter, one embodiment of the present invention will be described in more detail with reference to the accompanying drawings so that those skilled in the art can easily practice, but this is only an example, the present invention is limited thereto. It doesn't happen.

1 is a schematic cross-sectional view showing a collision prevention structure between a door pool and a transport structure of a ship according to an embodiment of the present invention, Figure 2 is a collision between the door pool and a transport structure of a ship according to an embodiment of the present invention This is a state diagram of the prevention structure.

As shown in FIG. 1, the collision prevention structure between the door pool and the transport structure of the ship of the present embodiment is based on the sea condition when the transport structure 120 is recovered through the door pool 110 of the ship 100. The support means for stably supporting and moving the transport structure 120 is installed even in the movement.

Here, the vessel 100 may be Floating Production Storage and Off-loading (FPSO) capable of producing and storing crude oil.

And the door pool 110 may be formed between the bow portion and the stern portion of the vessel 100.

The door pool 110 penetrates along the vertical direction from the ship's ship 100 to the ship's bottom and is used as a passage through which a drilling device, a drilling pipe, and the like are sent down to the sea floor.

In this case, the transport structure 120 of a remote operator vehicle (ROV) equipped with a robot arm (not shown) is used for various operations required for sampling or drilling as it is obtained and acquired through the door pool 110 from time to time.

The transport structure 120 is obtained and received through the door pool 110 by hanging on the wire 132 of the crane 130 installed on the ship. At least one of the lower side of the carrying structure 120, that is, the hanger 122 may be formed on both sides or four sides, the shape of the hanger 122 is connected to the wire 142 described below It is possible if it is a hook shape facing upward as a structure which does not detach easily.

On the other hand, the lower side of the door pool 110 is connected to each hanger 122 installed in the transport structure 120 is provided with a support means that can be stably supported when the transport structure 120 is taken over.

The support means is built in the lower side of the door pool 110 in a number corresponding to the hooks 122, the winding unit 140, the winding of the wire 142 is wound, and the winding unit 140 by rotating the wire 142 It may be configured as a motor 144 that can be automatically released and wound.

An end of the wire 142 wound on the winding unit 140 protrudes toward the lower side of the door pool 110, and the ring 143 may be formed to be easily caught by the hook hole 122.

The motor 144 is capable of forward and reverse rotation, and is driven by the adjustment of the controller 150, thereby releasing or rewinding the wire 142 wound on the winding unit 140.

In addition, although not shown, it may have a configuration that can be directly connected to the hook 143 of the wire 142 through the robot arm that is installed in the carrying structure 120 and remotely controlled.

The action of the collision prevention structure between the door pool and the transport structure of the vessel made of such a structure is as follows.

Referring to Figure 2, in general, the vessel 100 is a periodic movement by the maritime environment, the vessel 100 and the fluid motion inside the door pool 110 may have a different period and the vessel 100 and Different phase differences are generated between the fluids inside the door pool 110.

Due to such a phase difference, when the transport structure 120 is taken over, the transport structure 120 may hit the door pool 110 and be damaged. Here, when the transport structure 120 is obtained through the door pool 110, if the sea condition is poor, it is only a problem at the time of acquisition because it is necessary to wait until the sea condition is good, so that the transport structure 120 according to the present invention. The robot arm installed in the carrying structure 120 before the takeover) pulls the wire 142 protruding to the lower end of the door pool 110 to connect the hook 143 to each hanger 122.

When the wire 142 is connected to each hanger 122 of the transport structure 120 as follows, using the wire 130 connected to the crane 130 to gradually raise the transport structure 120, at this time By controlling the driving of the motor 144 through the controller 150, the wires 142 are loosened at the same or somewhat slower rate as the conveying structure 120 rises, so that tension is generated in each wire 142. Due to this, the transport structure 120 may be lifted with minimal movement while maintaining balance. On the contrary, when the transport structure 120 descends, the transport structure 120 may be wound at a speed equal to or lower than a descending speed. In addition, in the event of an emergency, the unlocking and locking of the wire 142 may be stopped through the controller 150. You can.

As the carrying structure 120 is raised, the winding unit 140 automatically unwinds the wire 142 by its length. When the transfer of the carrying structure 120 is completed, the wire hanging on the hook 122 on the ship is completed. The ring 143 of 142 is taken out.

The wire 142 is automatically wound around the winding part 140 by the driving of the motor 144.

According to the above, by installing a support means connectable to the lower side of the transport structure on the lower side of the door pool, it is possible to stably support the transport structure even in the movement of the vessel during the recovery of the transport structure through the door pool to prevent collision with the door pool Can be.

As described above as a specific embodiment of the anti-collision structure between the door pool and the transport structure of the ship according to the present invention, this is only an example, the present invention is not limited to this, the broadest range in accordance with the basic idea disclosed herein Should be interpreted as having Those skilled in the art can easily change the material, size, etc. of each component according to the application field, and can be combined / substituted the disclosed embodiments to implement a pattern of a timeless shape, but this also does not depart from the scope of the invention will be. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

1 is a schematic cross-sectional view showing an anti-collision structure between a door pool and a transport structure of a ship according to an embodiment of the present invention,

Figure 2 is a state diagram used in the collision prevention structure between the door pool and the transport structure of the ship according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100 ship 110 moon pool

120: transport structure 122: hook

130: crane 132, 142: wire

140: winding-up part 143: ring

144 motor 150 control unit

Claims (5)

At least one hook formed on the lower side of the carrying structure, Support means provided with wires to be unwound and wound at the winding portion to be connected to each hanger and to support the transport structure to be received through the door pool hanging on the crane Anti-collision structure between the door pool and the transport structure of the vessel included. The method of claim 1, And a collision prevention structure between the door pool of the ship and the transport structure to directly connect the wire to the hanger through a robot arm which is installed on the transport structure and remotely controlled. The method of claim 1, The winding portion is provided with a motor is capable of automatic loosening and winding, the drive of the motor is a collision prevention structure between the door structure and the shipping structure of the vessel is adjusted automatically unwinding and winding by the control unit. The method of claim 3, wherein By controlling the motor through the control unit, the wire is released to be slower than the rising speed or the rising speed of the carrying structure, and the falling speed or the falling speed of the carrying structure. Anti-collision structure between the ship's door pool and the transport structure to allow for faster winding. The method of claim 3, wherein The collision prevention structure of the ship's door pool and the transport structure to stop the unlocking and locking of the wire through the control in case of emergency.

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