KR100262759B1 - An ship for drilling the sea - Google Patents

Abstract

PURPOSE: A drilling ship is provided to control height of a worktable according to difference of water level to conveniently draw a support pile from a soft ground. CONSTITUTION: A drilling ship comprises a worktable(1) for drilling; a supporting pile(2); sliding pipes(3) mounted on the worktable and frame; and a buoy(4) preventing load of the worktable from delivering to the supporting pile. The drilling ship connects the worktable and the sliding pipe on upper and lower frame of a triangle shape with a frame, and installs the buoy on a lower portion of the sliding pipe not to deliver the weight of the worktable into the supporting pipe by generating buoyance. The buoy fixed on a lower portion of the sliding pipe discharges water to generate the buoyance by connecting a pump mounted on the worktable with a water hose(42). The drilling ship moves in a stable state of the ship body by reducing the buoyance through filling the water into the buoy. Thereby, the marine drilling ship moves on a ground by conveniently assembling and releasing.

Description

An ship for drilling the sea

The present invention relates to a fixed offshore drilling vessel for fixing the workbench to the soft ground with a support pile, and more particularly to adjust the height according to the tide difference while making it easy to draw the support pile from the soft ground during towing. It is about an offshore drilling ship.

At present, interest in the ocean is increasing due to the depletion of terrestrial resources, and the importance of accurate marine drilling survey is emerging as a preliminary stage of marine resource development.

Conventional offshore drilling ships have been mainly used in the harbors and shallow waters, but due to the deterioration of the conditions for drilling such as the enlargement of the port construction, deepening of the construction location, and super soft layer, accurate data can be obtained by the conventional drilling ships. Therefore, new drilling ships are required that are not affected by deep sea and sea conditions.

In addition, the drilling work required to work at a constant temperature is not possible due to fluctuations in the water surface and fluctuations in the tide when the wind wave is less than 1m. There is a need for harmful drilling ships.

In general, the drilling work at sea is carried out at low tide, and it is performed only for the rest of the time except the time required to move to the drilling site and the time of returning to the port of call. It is required to be able to minimize. Normally, the time spent for moving and drilling is about 10 hours, which takes 2 hours to move to the drilling site, 2 hours to return to the port of call, and satisfactory conditions for drilling for the remaining 6 hours.

Conventional floating offshore drilling vessels have a buoyancy body installed in a flat arrangement (horizontal) between the upper and lower plates of the workbench so that the upper and lower plates of the workbench bind the buoyant body and provide the buoyancy force for the buoyant body to work on the workbench. It is.

However, this structure has the advantage that it is possible to spend relatively much time for drilling work because the movement to the drilling site and the port of port is rapid, but the work bench is kept floating by the buoyancy of the buoyant body arranged in a plane. Therefore, the horizontal and vertical forces due to the wave force are transmitted as it is, so that the horizontal and vertical flow is severe, there was a problem that the entire drilling line is severely shaken.

The self-elevating drilling ship, which has been proposed to improve the problems of the conventional floating offshore drilling ship, installs a buoyancy body between the upper plate and the lower plate of the workbench, and has four support piles at four corners of the workbench. When the drilling work is installed by mounting the support pile to the bottom of the seam to be fixed, and when towing the drilling ship, the support pile is pulled up to the work table to make a navigation.

However, the drilling vessel of this structure has excellent characteristics to withstand the ocean waves, but when moving to the drilling site and fixing the support pile to the soft layer and pulling the support pile from the sea surface layer to return to the port of call after the drilling work is completed. Since it takes a lot of time, there is a problem that the time that can be devoted to the actual drilling operation is greatly shortened, and when the support file is lifted to tow while being fixed in the sea bed layer, the support file is not easily drawn from the sea surface layer. In the process of forcibly drawing, the entire drilling ship had a problem of overturning.

In addition, the conventional offshore drilling ship is integrated with the workbench and the support pile is not only possible to adjust the height of the workbench according to the tide difference, there is a problem that causes the difficulty of work due to the influence of the workbench due to the tide.

Therefore, the present invention was devised to solve the conventional problems as described above, the purpose of which is that the weight of the work table is not transmitted to the support pile so that the pulling of the support pile from the soft ground at the time of towing can be made more easily. While the height of the workbench can be adjusted according to the tide difference.

In order to achieve the object of the present invention, in order to support the workbench formed with the samba and the boring machine with a plurality of support piles, and to be able to elevate the support pile by wire transmission by a winch, Even if the slide pipe connected to the workbench is formed to be slidable, a plurality of guide rollers are formed on the slide pipe in contact with the support pile, and a plurality of pulleys are formed on the upper side of the support pile, and are drawn out from the winch on the workbench. The end of the wire is fixed to the slide pipe through the pulley, the buoy is formed on the lower side of the slide pipe, the buoy is formed by forming a water hose and air hose connected to the water pump on the workbench This is provided.

1 is a cross-sectional view of the marine drilling vessel of the present invention.

2 is a plan view of the drilling vessel of the present invention.

3 is an enlarged view of one end of the work table.

4 is a main view of the assembled state of the sliding pipe and the support pile.

5 is a winch mounting state for adjusting the anchor.

6 is a main part of the buoys to be mounted to the sliding pipe.

7 is a main view of the support pile.

8 is a plan view of main parts in a state in which the sliding pipe, the support pile and the buoy are assembled.

9 is a plan view of the main assembly state of the support pile and the sliding pipe.

10 is a state in which the sliding pipe is connected to the support pipe.

11 is a sectional view of the buoy part.

* Explanation of symbols for main parts of the drawings

1: workbench 11: sambari

12: boring machine 13: frame

14 winch 15: wire

16: pulley 17: water pump

18: wire guide pipe 19: water intake and drain hose

2: support pile 21: bottom plate support flange

3: sliding pipe 31: guide roller

32: band 33: bracing pipe

331: casing guide groove 4: buoy

41: air hose 42: water hose

Hereinafter, the drilling vessel for offshore drilling of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of the drilling vessel of the present invention, the drilling vessel of the present invention is a workbench 1 for drilling work, a support pile 2 for supporting the workbench, a sliding pipe 3 mounted to the workbench 1 and the frame 13. It is largely composed of a buoy (4) mounted on the lower end of the sliding pipe (3) so that the weight of the worktable 1 is not directly transmitted to the support pile (2).

The workbench 1 connects the workbench 1 and the sliding pipe 3 to the upper and lower frames by a frame 13 so that the weight is not transmitted to the support pile 2, and the stern for drilling in the center. (11) and the boring machine (12) are located, and three corners are provided with a sliding pipe (3) and a winch (14) for adjusting it. The wire 15 of the winch 14 is connected to the band 32 of the sliding pipe 3 via the pulley 16 provided on the upper end of the support pile 2. (FIG. 2, FIG. 3) , See figure 4.

In addition, each corner of the worktable (1) is supported by the tension of the anchor during the drilling operation due to the anchor connected to the end of the wire 15 is fixed by a plurality of winch 14 so as to be supported against the horizontal load (wind power, assistance, etc.) (See Figure 5.)

And a hose 19 for supplying or draining water to the buoy 4 installed at the bottom of the sliding pipe 3 is connected to the water pump 17 is installed (see Fig. 6).

The support pile (2) is grounded with the ground to support the hull to install a bottom plate support flange 21 at the lower end to increase the ground area with the ground.

A wire 15 extending from the winch 14 installed on the upper frame of the worktable 1 is connected to the bottom plate support flange 21, and the wire 15 is guided to the wire guide pipe 18. (See Figure 7.)

The sliding pipe (3) is connected to the work table (1) by a frame (13) to the upper and lower frame of the triangle and reduces the friction with the support pile (2) inside the sliding pipe (3) smoothly up and down the hull. A roller 31 is installed to operate. (See FIG. 8, FIG. 9)

And the sliding pipe (3) obtained in the water is connected to each other with a brace pipe 33 and to install a casing guide groove 331 in the middle thereof (see Fig. 10).

The buoy 4 is fixed to the lower end of the sliding pipe 3, the water hose 42 and the air hose connected to the water pump 17 is installed in the upper plate of the work table (1) into the buoy (4) 41) is installed (see also Figure 11).

The drilling vessel of the present invention connects the workbench 1 and the sliding pipe 3 to the upper and lower frames by the frame 13 and installs the buoy 4 at the lower portion of the sliding pipe 3 to generate buoyancy. (1) The weight is not transmitted to the support pile (2).

And buoy (4) is the core of the present invention is fixed to the lower end of the sliding pipe (3) is a water pump (17) installed on the worktable 1 is connected to the water hose 42, buoy ( 4) The buoyancy is generated by draining the water, and when the drilling ship moves, the buoy (4) is filled with water to reduce the buoyancy, so that the center of gravity is moved to the lower part, so that the ship can move in the stable state.

The air hose 41 installed in the buoy 4 is connected to the workbench 1 so that one end is exposed to the atmosphere. When the water is drained or filled in the buoy 4 for buoyancy or drilling line movement, the buoy ( 4) It is to release the vacuum inside.

The sliding pipes 3 in the water were connected to each other by the support pipes 33 to improve the stability of the work, and the casing guide grooves 331 were installed in the middle to prevent the bending of the casings due to the algae.

The casing, which was once used in a deep working paper, was not bent and bent, which greatly reduced the bending due to the casing guide groove 331, thereby greatly reducing the work cost.

The bottom plate support flange 21 is installed at the bottom of the support pile 2 to increase the ground and the ground area, thereby securing the stability of the work.

For the vertical load of the present invention, the self-supporting buoy 4 is supported by buoyancy, but the horizontal load (wind, tidal, etc.) is supported by the tension of the anchor connected to each corner.

The characteristics of the offshore drilling vessel of the present invention are not only easy to assemble and dismantle, but also to move on land during long distance movement. Hereinafter, the hypothesis and movement of the present drilling vessel will be described.

(One). Assemble hulls (hereinafter referred to as "drilling vessels") on land.

(2). The buoy 4 is filled with water through the water hose 42 using the water pump 17 so that the work table 1 floats by its buoyancy at the average sea level or at sea level, and then the buoyancy is reduced. Vary the drill ship to the point of survey.

(3). Use the state-of-the-art surveying equipment to establish the correct position and then lower the support pile (2) to the winch (14) of the drilling ship so that the bottom plate support flange (21) of the support pile (2) is fixed through the sliding pipe (3). .

(4). After the bottom plate support flange 21 is stationary, anchors are anchored with a tomb line.

(5). Hold the height of the workbench 1 while draining the water to the buoy 4 through the water hose 42 so that the position after the anchor is ready to work (at least 1 m from the surface of the water so as not to be affected by the blue). At this time, the water that was added is drained through the drain pipe 19 using the water pump (17).

(6). When the height of the worktable 1 is determined, the worktable 1 is fixed and the anchor wire 15 is tensioned with the winch 14 of the drilling line to make the best working condition to be stable to all external forces.

(7). At the time of movement, the buoy 4 is filled with water using the water pump 17 to gradually reduce the buoyancy while the drilling vessel touches the water surface.

(8). The support pile 2 supported on the bottom is pulled up using the winch 14. (The difference from other drilling lines here is that the buoy 4 supports all the weight of the hull, and thus the support pile 2 is pulled out. For example, it is much easier and more economical than conventional drilling vessels for offshore drilling.

(9). The anchor is rolled up using the anchor line and the anchor wire winch 14 and then moved to the next point using the preliminary line.

As described above, the present invention enables the drawing of the support pile from the soft ground to be easily carried out so that the weight of the work table is not transmitted to the support pile, thereby providing convenience and speed of towing, and also the work table according to the tide difference. By adjusting the height of the can be minimized the effect of the work table caused by the tide, thereby having an effect that can further increase the simplicity and efficiency of the work.

In addition, the disassembly and assembly of the workbench and the support pile is not only possible to move the land in the long distance, but also in the case of non-soft ground can be used to remove the buoy has the advantage of changing the structure according to the soil conditions.

Claims (1)

The workbench 1 on which the chamfer 11 and the boring machine 12 are formed is supported by a plurality of support piles 2, and the support piles 2 can be lifted by electric movement of the wire 15 by the winch 14. In the above, the slide pipe (3) is connected to the worktable (1) so as to slide up and down on the outer side of the support pile (2), but the support pile (2) and the rolling on the aircraft slide pipe (3) A plurality of guide rollers 31 are formed to contact each other, and a plurality of pulleys 16 are formed on the upper side of the support pile 2, and the ends of the wires 15 drawn from the winch 14 on the work table 1 The buoy 4 is fixed to the slide pipe 3 via the pulley 16, and the buoy 4 is formed at the lower side of the slide pipe 3, and the buoy 4 has a water pump 17 on the work table 1. An offshore drilling vessel characterized in that by forming a connected water hose 42 and an air hose (41).

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