KR101205359B1 - Floating Structure - Google Patents

Abstract

The present invention relates to a floating structure.
According to the floating structure according to the embodiment of the present invention, since the pipes can be continuously connected rapidly, there is an effect that the work time required for the drilling process can be reduced.

Description

Floating Structure

The present invention relates to a floating structure.

To obtain crude oil or gas from an oil well or gas well located on the seabed, drilling is required to drill holes extending into the well or gas well.

Offshore drilling can be done by floating structures equipped with drilling facilities, such as derricks, for installing pipes such as drill pipes, riser pipes, and the like.

For example, the pipe may be installed in such a way that the pipe is transferred to the drill floor by a predetermined transfer device and subsequently connected to the pipes which are already installed.

In detail, the pipe is lifted from the transfer device by using a lifting means such as a crane, and then the pipe is moved to the upper side of the existing pipe, that is, the drilling point. Then, the moved pipe is aligned with the existing pipe, and then coupled to the existing pipe.

However, the above-described conventional techniques have the following problems.

It takes a long time to move a pipe from a transfer device to a drilling point and to align it with an existing pipe, which increases the working time of a general drilling process requiring hundreds to thousands of pipe connection operations.

In particular, since the movement and alignment of pipes requires stability and accuracy, it is difficult to proceed at high speed.

Embodiments of the present invention, to provide a floating structure that can reduce the working time of the drilling process.

Floating structure according to an embodiment of the present invention, the main body capable of maintaining a floating state; Moon pull penetrating the main body in the vertical direction; A drill floor disposed above the door pool and including a hole through which the pipe passes; A pipe storage unit provided on one side of the main body; A pipe conveying part which conveys a pipe from the pipe storage part to the drill floor; An alignment device provided on the drill floor to align the pipe in the hole; And a lifting device for moving the pipe from the pipe conveying part to the alignment device while the pipe aligned in the hole and the pre-installed pipe are connected.

In addition, the alignment device, the base installed on the drill floor; A rotating part rotatably coupled to the base; And at least two or more rotation parts are installed, and a gripping part capable of selectively gripping a pipe.

In addition, the gripping portion is characterized in that the movable in the radial direction of rotation.

The rotating part may be rotated in a state parallel to the drill floor, and the gripping part may grip the pipe perpendicularly to the drill floor.

In addition, the lifting device is characterized in that the crane that can lift the pipe by lifting one side of the pipe.

In addition, in the state in which the rotation of the rotating unit is stopped, any one of the gripping portion is positioned to correspond to the hole, the other of the gripping portion is located in a position to receive the pipe from the lifting device It is done.

According to the floating structure according to the embodiment of the present invention as described above, it is possible to connect the pipes rapidly and continuously, thereby reducing the work time required for the drilling process.

1 is a view showing the structure of a floating structure according to an embodiment of the present invention.
2a and 2b show a first state in which a pipe is connected in the floating structure of FIG.
3a and 3b show a second state in which the pipe is connected in the floating structure of FIG.
4A and 4B show a third state in which pipes are connected in the floating structure of FIG. 1;

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

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a view showing the structure of a floating structure according to an embodiment of the present invention.

Referring to FIG. 1, the floating structure 10 according to an exemplary embodiment of the present invention includes a main body 100 capable of maintaining a floating state and a moon pool 110 penetrating the main body 100 in a vertical direction. The pipe storage unit 120 provided on one side of the main body 100, the support unit 140 supporting the drill floor 210 provided on the upper side of the main body 100, and the pipe storage unit 120 from the Pipe conveying unit 130 for transporting the pipe to the drill floor 210, the derrick 220 is installed on the drill floor 210, the alignment device 300 for positioning the pipe at the drilling point, and the pipe to the pipe conveying unit It may include a lifting device 240 to move from 130 to the alignment device (300).

The main body 100 is an object capable of maintaining a floating state floating in water, crude oil / gas drilling plant, crude oil / gas drilling vessel, floating crude oil production storage facility (FPSO), liquefied natural gas floating crude oil Production storage facilities (LNG FPSO).

The door pool 110 is formed in the form of a hole formed in the body 100 in the vertical direction. Pipes 400, such as drill pipes and riser pipes, may extend underwater through the door pool 110. In detail, the pipe 400 may be connected to the oil well / gas well or the sea floor by moving downward while continuously connecting a plurality of pipes.

The pipe storage unit 120 may be provided at a position such as an upper surface, a side surface, an interior of the main body 100, and stores the pipe 400 required for drilling and sampling. Equipment for moving the pipe 400 to the pipe transfer unit 130 may be provided inside the pipe storage unit 120.

The pipe transfer unit 130 extends from the pipe storage unit 120 to the drill floor 210, and transfers the pipe 400 to the lifting device 240 installed in the drill floor 210. The pipe conveying unit 130 may be a belt conveyor, a chain conveyor, or the like, and may be a crane capable of pulling up the pipe 400 with a hook connected to a wire.

The drill floor 210 may be installed to be spaced apart from the main body 100 by the support part 140, and may be disposed above the door pool 110. In the drill floor 210, the work of lowering the pipe 400 to the seabed through the door pool 110 may be continuously performed.

The drill floor 210 is provided with holes (FIGS. 2A and 211) through which the pipe 400 can pass.

The derrick 220 may be installed on the drill floor 210, and may include a drive (not shown) for moving the pipe 400 downward.

The lifting device 240 lifts a pipe transferred to the drill floor 210 by the pipe transporter 130 and transports the pipe to the alignment device 300. In the present embodiment will be described as an example that a crane including a hook (Fig. 2a, 242), winch (Fig. 2a, 244) and the like is used as the lifting device 240. In addition, the lifting device 240 may have a structure installed in the derrick 220.

The alignment device 300 may move the pipe received from the lifting device 240 to the drilling position and align the pipe to the correct drilling position. Here, the drilling position may correspond to the position of the hole 211. In detail, the drilling position is a position corresponding to directly above the installed pipe when the pipe is already installed through the hole 211, and a specific point of the seabed to be drilled when the pipe is not installed. It may be a position corresponding to directly above. In other words, the alignment device 300 may align the pipe and the hole 211 so that the pipe may vertically pass through the hole 211.

The alignment device 300 is driven so that the pipe received from the lifting device 240 can be connected to the pipes that are continuously installed, and the lifting device 240 receives the pipes transferred by the pipe transfer unit 130. Continuously delivered to the alignment device (300). In this case, the operation of connecting the pipes arranged by the alignment device 300 and the pre-installed pipes and the operation of transferring the pipes from the transfer unit 130 to the alignment device 300 may be simultaneously performed.

Hereinafter, with reference to the drawings for the process of the pipe connection is made in the floating structure 10 according to an embodiment of the present invention as described above.

In addition, hereinafter, a pre-installed pipe extending through the hole 211 and extending in the seabed direction will be referred to as a pre-installed pipe 410, and the pipe being moved by the alignment device 300 will be described below. Called 420, the pipe being transferred by the pipe transfer unit 130 will be referred to as a transfer pipe 430.

In addition, a state in which the movement is completed after the one pipe is connected to the installation pipe 410 is completed as the first state, and the preliminary pipe 420 next to the hole by the alignment device 300 is the hole ( A state aligned to 211 is referred to as a second state, and a state in which the next preliminary pipe 420 is connected to the installation pipe 410 is called a third state.

2A and 2B are views illustrating a first state in which a pipe is connected in the floating structure of FIG. 1, and FIG. 2A is a side view schematically illustrating components installed in the drill floor 210, and is shown in area A of FIG. 1. A corresponding part, FIG. 2B, is a plan view of FIG. 2A.

2A and 2B, a pipe passage hole 211 is formed in the drill floor 210 to allow the pipe to pass and extend in the seabed direction. The through hole 211 may be located directly above a specific point to be drilled located on the sea floor. The main body 100 is provided with a thruster (not shown) to adjust the position of the hole 211, that is, the position to be drilled at sea.

The lifting device 240 may be disposed on one side of the pipe conveying unit 130, and supports the frame 241, a hooking unit 242 that can lift the pipe by lifting the pipe, and a hooking unit 242. A wire 243, a winch 244 capable of adjusting the vertical position of the hook part 242 by winding the wire 243, and a guide 245 for guiding a horizontal movement of the winch 244. It may include. The guide 245 may be a slot.

The lifting device 240 adjusts the winding amount of the wire 243 and the position in the guide 245 of the winch 244, thereby moving the hook portion 242 in the vertical and horizontal directions, so that the hook portion The pipe hung on 242 may be carried to the alignment device 300.

Such a configuration of the lifting device 240 is only one example, and various known means for lifting the transfer pipe 430 to the alignment device 300 may be used.

Meanwhile, at least two or more bases 310 installed on the drill floor 210, rotating parts 320 installed rotatably on the base 310, and the rotating parts 320 are installed on the alignment device 300. And a gripping portion 330 for selectively gripping the pipe.

A driving device such as a motor (not shown) may be provided inside the base 310 to rotate the rotating part 320.

The rotating part 320 may be seated on the base 310 to rotate horizontally with the drill floor 210. The rotating part 320 may be provided with a driving device such as a motor (not shown), a pinion gear (not shown), a rack gear (not shown) for operating the holding part 330.

In addition, the rotating part 320 is formed in a size rotatable between the pipe transfer part 130 and the hole 211, the plane is a circular or regular polygon so that the holding part 330 is in a constant position even if it is rotated It may be formed in the shape of.

The gripping portion 330 may be installed in a shape that protrudes in the rotational radial direction on the rotating part 320, and may be disposed at equal intervals along the outer circumferential surface of the rotating part 320. The gripping part 330 may selectively grip the pipe by a driving device provided in the rotating part 320. At this time, the gripping portion 330 may grip the pipe so that it is located long in the vertical direction.

One of the gripping parts 330 may be positioned above the hole 211 so that the preliminary pipe 420 may be connected to the pre-installed pipe 410 while the rotating part 320 stops rotating. The other may be positioned to face the pipe transfer unit 130 to receive the transfer pipe 430. That is, the preliminary pipe 420 may be aligned above the pre-installed pipe 410 by the gripper 330.

In addition, the grip part 330 may be provided to be movable in the radial direction of the rotating part 320. For example, the holding unit 330 after the preliminary pipe 420 is placed on the upper portion of the hole 211, the subsequent work such as the connection work of the preliminary pipe 420 and the installation pipe 410, and the like. It may be recessed into the rotating part 320 so that this can be easily achieved. A solenoid driving device for linearly moving the holding part 330 may be provided inside the rotating part 320.

In addition, the gripping portion 330 may be controlled to be driven independently of each other.

In the present embodiment, the rotating part 320 is formed in a planar square shape, four holding parts 330 are provided, each will be described as an example provided in the center of the corner of the square. That is, the gripping portion 330 may be disposed to have an angular distance of 90 ㅀ with respect to the center of the rotating portion 320. In this case, the rotating part 320 may be rotated by 90 ° every time, and at least one of the holding parts 330 may be driven to be positioned above the hole 211 when the rotation stops.

Hereinafter, for convenience of description, the gripping portion located above the hole 211 based on the first state illustrated in FIGS. 2A and 2B will be referred to as the first gripping portion 331, and respectively, in the clockwise order. The second gripping portion 332, the third gripping portion 333, and the fourth gripping portion 334 will be referred to as. That is, the third gripping portion 333 is located on the opposite side of the first gripping portion 331.

And, the rotating unit 320 will be described as an example that rotates in the clockwise direction.

In the first state, the installation pipe 410 is completed to move downward by the drive. The first gripping part 331 may be inserted into the rotating part 320 to facilitate the operation of the drive after placing the pipe held by the upper side of the hole 211. In addition, the third gripping portion 333 may grip the pipe transferred by the lifting device 240. The fourth gripping portion 334 holds the preliminary pipe 420.

In addition, the hook part 242 may return the pipe to the upper side of the transfer pipe 430 transferred by the pipe transfer part 130 after transferring the pipe to the third holding part 333.

3A and 3B are views showing a second state in which a pipe is connected in the floating structure of FIG. 1, FIG. 3A is a side view schematically showing components installed in the drill floor 210, and FIG. 3B is FIG. 3A. Top view of the.

3A and 3B, the rotation part 320 is rotated 90 ° clockwise in the first state to be in the second state.

In this case, the fourth gripping portion 334 may be located above the hole 211. In other words, the preliminary pipe 420 may be positioned directly above the pre-installed pipe 410.

In addition, the first gripping portion 331 may move to the position of the second gripping portion 332 in the first state, and may protrude again as much as it is embedded.

In this case, the lifting device 240 adjusts the position of the winch 244 and the winding amount of the wire 243 to move the hook portion 242 to the transfer pipe 430 on the pipe transfer portion 130. You can. And, the worker may work to hang one end of the transfer pipe 430 to the hook portion 242. Alternatively, when the hook part 242 is provided with an electromagnet, the lifting device 240 places the hook part 242 around the transfer pipe 430 and drives the electromagnet without the help of an operator. The transfer pipe 430 may be lifted.

4A and 4B show a third state in which the pipe is connected in the floating structure of FIG. 1, FIG. 4A is a side view schematically showing the components installed in the drill floor 210, and FIG. 4B is FIG. 4A. Top view of the.

4A and 4B, the preliminary pipe 420 held by the fourth gripper 334 is connected to the pre-installed pipe 410. For example, at the end of each pipe, female and male threads may be formed to correspond to each other, and may be coupled to each other by screwing.

In this case, the fourth gripping part 334 may be embedded in the rotating part 320 with the preliminary pipe 420 so that the above pipe connection work and the downward movement work can be performed smoothly.

Meanwhile, while the preliminary pipe 420 is moved downward by being connected to the installation pipe 410, the second gripping portion 332 moves the transfer pipe 430 moved by the hook portion 242. Gripping.

Here, the gripping operation of the transfer pipe 430 by the second gripping portion 332 may be finished before the preliminary pipe 420 is connected to the pre-installed pipe 410 and moved downward. In this case, when the pipe is moved downward by the drive, the rotating unit 320 is rotated immediately followed by the connection of the next pipe may be performed.

The hook portion 242 may return to the position of the first state to lift the next transfer pipe when the transfer operation of the transfer pipe 430 to the second grip portion 332 is completed.

When the downward movement of the preliminary pipe 420 connected to the installation pipe 410 is completed, and the second gripping portion 332 completes the gripping of the transfer pipe 430, the first pipe is in the first state. In addition, the rotation unit 320 may rotate 90 ° clockwise again to repeat the above-described processes in the second and third states.

Connection of the pipe extending to the seabed through the door pool 110 by the alignment device 300 and the lifting device 240 having the configuration as described above can be made continuously.

In detail, at one side of the alignment device 300 is connected to the pre-installed pipes 410 and the preliminary pipe 420 and the downward movement operation, at the other side, the transfer pipe 430 to the alignment device ( 300) is done. Therefore, when one pipe is connected, the pipe connecting operation may be performed at a very high speed as the rotary unit 320 may be rotated to immediately perform the next pipe connecting operation.

In this case, the gripping portion 330 is positioned above the hole 211 so that the pre-installed pipe 410 and the preliminary pipe 420 are aligned so that the time required to align for the pipe connection It can be shortened.

More specifically, the pipe lifting time T1, the pipe alignment time T2, and the pipe connection time T3 have all been repeatedly taken before the pipe downward movement by the drive. However, according to the floating structure 10 according to the embodiment of the present invention, the time for connecting the preliminary pipe 420 to the pre-installed pipe 410 that may correspond to the pipe connection time (T3) and the Only the longer time for connecting the transfer pipe 430 to the alignment device 300, which may correspond to the pipe lifting time T1, and the time required for the rotation of the rotating part 320 are required. Since the rotation of the rotating part 320 is performed by a predetermined driving device such as a motor, the rotation part 320 may be made at a time that is negligible as fast as possible. Therefore, the pipe connecting operation can be performed at a higher speed than in the prior art.

That is, the time corresponding to the pipe lifting time T1 or the pipe connection time T3 and the pipe alignment time T2 can be saved. Thus, the work time required for the entire drilling process can be greatly reduced.

As described above as a specific embodiment of the floating structure according to the embodiment of the present invention, but this is only an example, the present invention is not limited to this, should be construed as having the broadest range in accordance with the basic idea disclosed herein. do. 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 present 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.

10: floating structure 100: main body
110: moon pool 120: pipe storage
130: pipe conveying unit 210: drill floor
220: Derrick 240: lifting device
242: hanger 244: winch
300: alignment device 310: base
320: rotating part 330: holding part
400: pipe 410: installation pipe
420: spare pipe 430: feed pipe

Claims (6)

A main body capable of maintaining a floating state;
Moon pull penetrating the main body in the vertical direction;
A drill floor disposed above the door pool and including a hole through which the pipe passes;
A pipe storage unit provided on one side of the main body;
A pipe conveying part which conveys a pipe from the pipe storage part to the drill floor;
An alignment device provided on the drill floor to align the pipe in the hole; And
A lifting device for moving the pipe from the pipe conveying portion to the alignment device while the pipe aligned in the hole is connected to the pre-installed pipe,
The alignment device,
A base installed on the drill floor;
A rotating part rotatably coupled to the base; And
At least two or more installed on the rotating part, and includes a gripping portion for selectively gripping the pipe,
In a state where the rotation of the rotating unit is stopped,
Any one of the gripping portions is positioned to correspond to the hole,
The other of said gripping portions is located in a position capable of receiving a pipe from said lifting device. delete The method of claim 1,
The gripping portion is a floating structure, characterized in that movable in the radial direction of rotation. The method according to claim 1 or 3,
The rotary part is rotated in parallel with the drill floor,
And the gripping portion grips the pipe perpendicular to the drill floor. The method according to claim 1 or 3,
The lifting device,
Floating structure, characterized in that the crane can lift the one side of the pipe to raise the pipe. delete

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