KR101368800B1 - Drill ship - Google Patents

Abstract

Crude oil drilling ship is disclosed. Crude oil drilling vessel according to an embodiment of the present invention, the hull having self-determination ability; A support leg portion coupled to the hull so as to be lifted and lowered and supporting the hull spaced apart from the sea with respect to the bottom of the sea; And a drilling module moving unit mounted on the hull to move the drilling module for excavating the sea bottom to at least one of the stern side and the both side of the hull.

Description

Crude Oil Drilling Ship {DRILL SHIP}

The present invention relates to a crude oil drilling ship, and more particularly, to a crude oil drilling ship having a self-defense capability in a jack-up type rig ship and capable of moving the position of derrick in multiple directions.

Unlike general ships, crude oil drilling ships are equipped with search and drilling equipment, so they can search the continental shelf or deep sea where the resources are likely to be buried, and penetrate the bottom of the sea to mine natural gas or crude oil buried in the area. to be.

In general, oil drilling rigs can be drilled, semisubmersible drilling rigs and self-elevating jack-ups depending on the depth, mobility and mooring method of the working area. Rig) and the like.

First, the Drill Ship is a crude oil drilling vessel with advanced drilling equipment that can sail on its own power without tugboats and can drill crude oil in the deep seas from 3000m to 10,000m. The drillship can be moored at the drilling point by controlling its position with the Dynamic Positioning System (DPS) and the azimuth thruster during the drilling operation. Here, the DPS (Dynamic Positioning System) refers to a system in which a vessel is located in a changing environment at any time by finding the current position of the vessel through GPS and sending a blue wave, seawater flow, and wind direction around the vessel to the vessel's control tower in real time.

These drillships are capable of propulsion of the magnetic force, but have excellent maneuverability, but during the subsea drilling operation, the position control is controlled by DPS and azimuth thruster.

Semi-submersible drilling rigs are formed by connecting the upper deck and lower hulls with columnar columns and bracings to reduce turbulence of the structure due to blue light. It is a crude oil drilling ship in the form of an offshore platform where drilling or production work is carried out to develop subsea oil fields or gas fields in semi-submersible state.

During operation, the lower buoyancy hull is submerged in water and only the cylinders protrude above the surface to support the superstructure of the water. Greatly improves. When moving, float the buoyancy hull over the water and use a propulsion system or tugboat.

It can be said to be stable in structure, but the upper deck area is large, and thus, a large amount of equipment can be shipped, which may result in temporary instability in bad weather. This has actually caused a major rollover. Compared to drillships, the maneuverability is weak, and manufacturing costs and operating costs are high.

Self-elevating jack-up rigs are buoyant hulls with elevating legs and are moved by tugboats. Under search and drilling operations, the jack-up leg is undersea. It is a crude oil drilling ship in the form of offshore platform that secures down on.

These self-elevating jack-up rigs are used to develop oil fields and gas fields in the sea (approx. 150 m deep). Typically, the offshore oil fields or gas fields are developed while the legs are fixed to the sea floor. When the drilling or production work is completed and the work is completed, the legs are jacked up and the tug is towed to move to another area. Fixedness is superior to dripships and semi-submersible drilling rigs, but it is impossible to maneuver in deep waters and has a weak maneuverability.

On the other hand, in the conventional lift jack up rig, three jack-up legs are placed on each corner of the triangular platform forming a buoyancy hull, and a drilling derrick protrudes outward from one side of the platform. It has a structure that becomes. In addition, the leg structure used in the jack-up mode is designed with a high-strength material and structure that can withstand environmental loads (blue, algae, wind, etc.) in the installation sea area.

Nevertheless, the conventional lift jack up rigs collapse the triangular support structure due to the imbalance of the moment due to the punch through phenomenon in the process of submerging the jack up leg on the seabed. It often happens that you can't stand it and sink.

In addition, in order to develop an effective undersea resource, if the drilling fails at a certain point, it should be possible to place the drilling derrick at another expected drilling point or move to another area immediately. Since the length and the length are limited, it is difficult to move the drilling derrick in multiple directions within the hull, and there is a problem in that mobility is weak because it is impossible to propel itself.

Republic of Korea Patent Publication No. 2012-0018892 Daewoo Shipbuilding & Marine Engineering Co., Ltd. 2012.03.06

The technical problem to be achieved by the present invention, it is possible to stably fix the hull in the work area, and to move the drilling module from the ship side to the stern side or the outer side of the ship side to increase the efficiency of oil drilling and search operation, It is to provide a crude oil drilling rig with the capability to move quickly to other areas as needed.

According to an aspect of the invention, the hull having self-determination ability; A support leg portion coupled to the hull so as to be lifted and lowered and supporting the hull spaced apart from the sea with respect to the bottom of the sea; And a drilling module moving unit mounted on the hull to move the drilling module for excavating the sea bottom to at least one of the stern side and both side sides of the hull.

The drilling module moving unit is disposed in the deck of the hull in which the drilling module is located extending in at least one of the stern side direction of the hull and both sides of the hull to guide the drilling module into and out of the hull. Guide rail portion; A moving support block coupled to a lower portion of the drilling module to support the drilling module and move along the guide rail portion; And a cable winding unit installed on the hull and winding at least one cable connected to the moving support block.

The guide rail portion, the first guide rail disposed in the stern side along the longitudinal direction of the hull; A second guide rail crossing the first guide rail and disposed at one side of the hull along a width direction of the hull; And a third guide rail intersecting the first guide rail and disposed to the other side of the hull along the width direction of the hull.

The guide rail unit may further include at least one extension rail extending outwardly of the hull in at least one of the first guide rail, the second guide rail, and the third guide rail.

The extension rail may be connected to the hydraulic cylinder to expand and expand outboard by the operation of the hydraulic cylinder provided in the hull.

The guide rail portion is provided at an intersection area of the first guide rail, the second guide rail and the third guide rail, and at least one of the first guide rail, the second guide rail and the third guide rail. It may further include a connection rail portion that is selectively connected.

The connection rail unit may include: a connection rail selectively connected to at least one of the first guide rail, the second guide rail, and the third guide rail; And a connection rail rotating plate supporting the connection rail and being rotatably provided relative to the hull.

The drilling module moving unit may further include an inclination angle adjustment hydraulic cylinder connected to the guide rail portion to adjust the inclination of the guide rail portion at a predetermined angle with respect to the deck surface of the hull.

According to the present invention, it is possible to stably fix the hull in the working area, to move the drilling module from the ship side to the stern side or the outer side of the ship side to increase the efficiency of oil drilling and search operation, with self-defense ability If necessary, crude oil drilling vessels can be provided for rapid movement to other areas.

1 is a perspective view of a crude oil drilling ship according to an embodiment of the present invention.
FIG. 2 is a schematic side view of the crude oil drilling ship of FIG. 1.
3 is a schematic cross-sectional view of the crude oil drilling ship of FIG.
4 is a view showing a moving state of the drilling module according to the present embodiment.
5 is a view illustrating a first guide rail and a moving support block according to the present embodiment.
6 is a view for explaining the operation of the extension rail according to the present embodiment.
7 is a view illustrating a state in which a connection rail is connected to a first guide rail according to the present embodiment.
8 is a view illustrating a state in which a connection rail is connected to second and third guide rails according to the present embodiment.
9 is a view showing a guide rail portion inclined adjustment according to another embodiment of the present invention.

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.

Prior to the description of the drawings, the oil drilling vessel according to the present invention can be used appropriately modified for various purposes, but for convenience of explanation, energy resources such as crude oil, natural gas, gas hydrate, etc. are described below in a seabed of about 150 meters in depth. The case of use as a substitute for a jack up drilling rig ship whose main purpose is exploration, drilling and production will be described.

1 is a perspective view of a crude oil drilling ship according to an embodiment of the present invention, Figure 2 is a schematic side view of the crude oil drilling ship of FIG.

Referring to these drawings, the crude oil drilling ship 10 according to the present embodiment is coupled to the hull 20 having self-deflection capability and the hull 20 can be lifted and lowered to the hull 20 with respect to the sea bottom. Drilling module moving unit for moving the support leg portion 100 to be spaced at sea and the drilling module 300 mounted on the hull 20 to excavate the bottom surface of the hull 20 in the stern and both sides 200.

The hull 20 of the crude oil drilling ship 10 according to the present embodiment may be manufactured similar to the hull shape of a general ship having self-defense ability. That is, the deck portion 22 of the hull 20 may be provided to have a rectangular flat surface, unlike the rig line of the fixed triangular platform type, which had a lot of space constraints in the past.

The deck portion 22 of the hull 20 forming such a rectangular flat surface is advantageous for designing a more advantageous jack up leg structure compared to the conventional triangular support jack up leg structure. Therefore, the crude oil drilling line 10 according to the present embodiment implements a jack-up leg structure having a rectangular support shape by installing at least four support legs 100 to be described later in the corner area of the deck part 22 of the hull 20. Fixability and stability can be improved than before.

In addition, the crude oil drilling ship 10 according to the present embodiment is provided to be movable without mounting a power source in the hull 20 by a tugboat. Therefore, the crude oil drilling ship 10 according to the present embodiment may fail to drill at a specific point or may immediately move to another area in case of emergency.

As a propellant of the crude oil drilling ship 10, an azipod thruster 24 may be applied. The Agford thruster 24 is a propeller rotatable 360 degrees about an axis perpendicular to the hull 20 and is disposed on the bottom of the fore and aft bottom of the crude oil drilling vessel 10 according to the present embodiment to move the crude oil drilling vessel 10. Or control the position by propulsion, back propulsion or by rotating the hull 20. The application of the Agford thruster 24 as a propellant as in this embodiment has the advantage of being able to easily control the position of the oil drilling rig 10 during jack up to raise and lower the support leg 100 on the seabed. have.

In addition, the deck portion 22 of the hull 20 according to the present embodiment is equipped with a variety of equipment, including the drilling module 300 and the topside module (400, Topside module), the deck portion of the hull 20 ( 22 may be provided to sufficiently secure the drilling workspace and the crew's living quarters 21 space.

On the other hand, the drilling module 300 is an integrated device for exploring and drilling the seabed resources by excavating the seabed ground, derrick (Truss) of the truss structure (Derrick), and not shown, excavation is connected to the derrick 310 It includes a drilling pipe, a casing, and a riser. Here, casing refers to a pipe installed around the hole so that the ground does not collapse even when a hole is drilled in the seabed during drilling, and a riser is a series of pipes between the seabed and the hull.

The support leg portion 100 is a mooring device for supporting the hull 20 spaced apart from the working sea with respect to the bottom of the sea floor. As described above, the corner portion of the deck portion 22 of the deck portion 22 of the hull 20 forming a rectangular flat surface. In the longitudinal direction of the hull 20 includes four support legs 100 are coupled to be elevated.

In this embodiment, each of the support legs 100 may be elevated relative to the hull 20 by a combination of rack and pinion gears. In other words, although not shown in detail in the drawing, a rack is formed along each longitudinal direction of the support legs 100, and the pinion is provided on the coupling portion 23 of the hull 20 to which the support legs 100 are coupled. The support legs 100 are elevated by engaging the rack.

At this time, since the load of the hull 20 is supported by the meshed portion of the rack and pinion gear, the rack and pinion are provided to have sufficient rigidity. Thus, when the support legs 100 are lowered and fixed in the seabed in this manner, the hull 20 is lifted up several meters above the sea level by the support legs 100 to be fixed to the working sea. However, the scope of the present invention is not limited to the jack-up method by the rack and pinion combination, a method using a hydraulic cylinder may be applied.

On the other hand, the conventional drilling module 300 is disposed in the hull 20 through a moon pool of the hull 20, which is generally a cylindrical cavity equipment in the center of the hull 20, or the hull 20 It is installed to protrude in one direction of the up and down drilling equipment to the seabed, in the prior art, when the drilling fails at a certain point, the jacking up of the hull 20 must be redone to re-drill to another adjacent point. There was a problem.

However, the drilling module 300 according to the present embodiment can be moved in and out of the stern side or both sides of the hull 20 can supplement the problems of the prior art. And the multi-directional position movement of the drilling module 300 can be achieved by the drilling module moving unit 200.

FIG. 3 is a schematic cross-sectional view of the crude oil drilling line of FIG. 1, FIG. 4 is a diagram illustrating a moving state of a drilling module according to the present embodiment, and FIG. 5 is a diagram illustrating a first guide rail and a moving support block according to the present embodiment. 6 is a view for explaining the operation of the extension rail according to the present embodiment, Figure 7 is a view showing a state in which the connection rail according to the present embodiment is connected to the first guide rail, Figure 8 is this embodiment 10 is a view illustrating a state in which a connection rail according to an example is connected to second and third guide rails.

Referring to these drawings, the drilling module moving unit 200 is disposed extending to the stern side of the hull 20 and both sides of the hull 20 to guide the drilling module 300 into and out of the hull 20. A part 210 and a moving support block 220 coupled to the lower portion of the drilling module 300 to support the drilling module 300 and moving along the guide rail portion 210 and installed on the hull 20 are moved. It includes a cable winding unit 230 for winding at least one cable (W) connected to the support block 220.

Prior to the description, the drilling module 300 according to the present embodiment is coupled to the upper portion of the moving support block 220 is moved into and out of the hull 20. Therefore, hereinafter, the movement of the moving support block 220 will be regarded as the movement of the drilling module 300 for convenience of description.

The moving support block 220 supports the drilling module 300 and moves along the guide rail portion 210, and the center portion is provided in a hollow shape so that the drilling equipment of the drilling module 300 is moved up and down, and both lower sides thereof. In the guide rail portion 210 may be provided with a structure that is movable sliding. Of course, although not shown, the drilling module 300 may be coupled to the upper portion of the movable support block 220.

The guide rail portion 210, as shown in Figures 3 and 4, the deck portion 22 of the hull 20 in a substantially "T" shape branching in three directions at one point in the longitudinal direction of the hull 20. It is arranged in the role of guiding the moving support block 220 in and out of the hull (20).

The guide rail portion 210 crosses the first guide rail 211a and the first guide rail 211a disposed in the stern side along the longitudinal direction of the hull 20 and along the width direction of the hull 20. The second guide rail 211b disposed to one side of the 20, and the third guide rail 211c disposed to the other side of the hull 20 along the width direction of the hull 20 and intersect the first guide rail. And at least one extension rail extending outboard of the hull 20 in at least one of the first guide rail 211a to the third guide rail 211c.

The first guide rail 211a guides the movement of the movable support block 220 in the stern direction, and the second guide rail 211b and the third guide rail 211c respectively move the movable support block 220 in both side directions. To guide.

In this embodiment, each of the guide rails 211a, 211b, and 211c is provided as a pair of beams spaced apart from each other, and the guide rails 211a and 211b are disposed on the bottom of the movable support block 220. A rail groove 221 sliding along 211c is provided. However, the scope of the present invention is not limited to these matters, and the movable support block 220 has a plurality of rollers inside the rail groove part 221 to enable rolling along the guide rails 211a, 211b, and 211c. It may be further provided.

The first guide rail 211a extending in the stern direction has a longer length than the second and third guide rails 211c extending in the lateral direction. However, the scope of the present invention is not limited to these matters, and the length of the first to third guide rails 211c may include the arrangement of the drilling module 300 in the hull 20 and the deck portion 22 of the hull 20. Can be adjusted according to the structure of the.

In the present embodiment, the extension rails 212a, 212b, and 212c are portions for moving the moving support block 220 out of the ship, and are provided to extend outboard inside the guide rails 211a, 211b, and 211c. In other words, most of the ends of the extension rails 212a, 212b, and 212c are disposed in the guide rail, and the movable support block 220 is extended by the cable winding 230 to extend the extension rails 212a. The extension rails 212a, 212b, and 212c support the movable support block 220 and extend outwardly from the inside of the guide rails 211a, 211b, and 211c.

Detailed description of the extension rails 212a, 212b, and 212c will be described later, and the movable support block 220 has the edge of the stern or both sides of the deck portion 22 of the hull 20, that is, the extension rail ( First, the cable winding 230 moving to the tips of 212a, 212b, and 212c will be described.

The cable winding 230 according to the present exemplary embodiment may be a plurality of winches 230 and winchs, and may be disposed at front and rear positions of the moving support block 220 guided along the guide rails 210. That is, the plurality of winches 230 (see FIGS. 3 and 4) may be provided at the center of the stern and the side edges and the center of the deck portion 22 of the hull 20 based on the possible movement paths of the movable support block 220. Can be arranged in pairs.

When the moving support block 220 is moved from the central area of the hull 20 to the edge of the stern or the side of the ship, the cable W is connected to the moving support block 220 and then the cable W is connected to the stern or the side of the ship. The pair of winches 230 arranged to pull the movable support block 220 along the guide rails 211a, 211b, and 211c to the edges of the stern or both sides, that is, the ends of the extension rails 212a, 212b, and 212c. Can be moved to

On the contrary, the center of the deck portion 22 of the hull 20 is to be moved from the edge of the stern or the side of the ship, that is, the tip portion of the extension rails 212a, 212b, and 212c to the center area of the deck portion 22 of the hull 20. The moving support block 220 may be pulled and moved by using the pair of winches 230 disposed on the region or the side of the ship.

The cable winding 230 and the guide rails 211a, 211b, and 211c serve to move the movable support block 220 in the hull 20 by a predetermined distance, and substantially move outside the hull 20. Extension rails 212a, 212b, and 212c are responsible for moving the support block 220 in position.

The extension rails 212a, 212b, and 212c according to the present embodiment extend outboard of the hull 20, respectively, inside the first guide rail 211a, the second guide rail 211b, and the third guide rail 211c. And a first extension rail 212a, a second extension rail 212b, and a third extension rail 212c that are deployed.

Since the first to third guide rails 211a, 211b and 211c and the first to third extension rails 212a, 212b and 212c operate in the same structure, the first guide rail 211a and the first extension rail 212a are operated. This will be described based on the following.

Only the tip portion of the first extension rail 212a is exposed to the hull 20, and the remaining portion is disposed inside the first guide rail 211a. In this case, the length of the first guide rail 211a in the hull 20 may be adjusted so that the tip portion of the first extension rail 212a may be disposed in the edge region of the stern.

The hydraulic cylinder 213 connected to the rear end of the first extension rail 212a is further provided inside the first guide rail 211a. Accordingly, the first extension rail 212a may be partially drawn in and out of the first guide rail 211a by the expansion and contraction action of the hydraulic cylinder 213. That is, when the movable support block 220 is positioned at the tip of the first extension rail 212a, when the hydraulic cylinder 213 is operated, the first extension rail 212a supports the movable support block 220 and is stern. It is expanded outwardly to the side, and as a result, the movable support block 220 can be moved outboard.

In addition, the first extension rail 211a is provided at an end region extending outboard of the hull 20 and includes a stopper S (see FIG. 6) for preventing the movement of the moving support block 220.

On the other hand, the guide rail portion 210 according to the present embodiment needs a means for shifting the position of the moving support block 220 out of the stern side ship outboard side ship side or vice versa. Therefore, the guide rail portion 210 according to the present embodiment is provided at the intersection of the first guide rail 211a, the second guide rail 211b and the third guide rail 211c, and the first guide rail 211a. And a connection rail part 214 selectively connected to at least one of the second guide rail 211b and the third guide rail 211c.

As shown in FIGS. 7 to 8, the connection rail part 214 is provided on the upper surface of the rotating plate 216 and the rotating plate 216 which are provided to be rotatable relative to the hull 20, and the first guide. And a connection rail 215 selectively connected to at least one of the rail 211a, the second guide rail 211b, and the third guide rail 211c.

In this embodiment, the rotating plate 216 may be provided in a disc shape, and a rotating shaft (not shown) may be connected to the lower portion of the rotating plate 216. The connection rail 215 may be provided to correspond to the guide rails 211a, 211b, and 211c as a pair of straight beams crossing the center of the rotating plate 216.

In such a configuration, when the movement of the support block 220 from the stern side to both sides is required, the movement support block (using the winch 230 disposed in the center area of the deck portion 22 of the hull 20) 220 is pulled and positioned on the connection rail 215, and the rotary plate 216 is rotated so that the connection rail 215 is connected to the second guide rail 211b and the third guide rail 211c. Then, using either one of the winch 230 and the second or third extension rail disposed on both side edges to move the moving support block 220 in any one side side outboard as described above.

9 is a view showing a guide rail portion inclined adjustment according to another embodiment of the present invention.

The crude oil drilling line 10 according to the present embodiment has the same configuration as most of the above-described embodiments. However, in the present embodiment, the drilling module moving unit 200, the inclination angle is connected to the guide rail portion 210 to adjust the inclination of the guide rail portion 210 at a predetermined angle with respect to the line of the hull 20 The control hydraulic cylinder 240 further includes.

The inclination angle adjustment hydraulic cylinder 240 is expanded and contracted by the inclination angle adjustment hydraulic cylinder 240 one by one in the longitudinal direction, respectively, on one side of the first guide rail 211a, the second guide rail 211b and the third guide rail 211c. By adjusting the inclination angle of the first guide rail 211a, the second guide rail 211b and the third guide rail 211c. Of course, Figure 10 shows the inclination of the guide rails (211a, 211b, 211c) somewhat exaggerated, but the inclination of the guide rails (211a, 211b, 211c) within the range to maintain the stability of the drilling module 300 can be limited. have. The inclined arrangement of the guide rails 211a, 211b, and 211c facilitates the flow of the moving support block 220, and also has the advantage of accelerating or decelerating the moving speed.

The oil drilling rig 10 of the present embodiment having such a configuration can solve the spatial constraints of the conventional fixed platform, and also ensures the mobility and fixability of the hull 20 and the drilling module 300 at the same time so that the resources at sea Development efficiency can be improved.

 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.

10: oil drilling ship 20: hull
100: support leg 200: drilling module moving unit
210: guide rail portion 211a: first guide rail
211b: 2nd guide rail 211c: 3rd guide rail
212a: first extension rail 212b: second extension rail
212c: third extension rail 220: moving support block
221: rail groove 230: winch
240: inclined adjustment hydraulic cylinder 300: drilling module

Claims (8)

A hull with self-defense capability;
A support leg portion coupled to the hull so as to be lifted and lowered and supporting the hull spaced apart from the sea with respect to the bottom of the sea; And
And a drilling module moving unit mounted on the hull to move the drilling module to excavate the sea bottom in at least one of the stern side and both side sides of the hull. The method of claim 1,
The drilling module moving unit,
A guide rail portion extending from the deck of the hull in which the drilling module is located in at least one of the stern side direction of the hull and both sides of the hull to guide the drilling module into and out of the hull;
A moving support block coupled to a lower portion of the drilling module to support the drilling module and move along the guide rail portion; And
Crude drilling rig provided with the hull including a cable winding unit for winding at least one cable connected to the moving support block. 3. The method of claim 2,
The guide rail portion,
A first guide rail disposed in the stern side along the longitudinal direction of the hull;
A second guide rail crossing the first guide rail and disposed at one side of the hull along a width direction of the hull; And
A crude oil drilling ship comprising a third guide rail crossing the first guide rail and disposed toward the other side of the hull along the width direction of the hull. The method of claim 3,
The guide rail portion,
The oil drilling vessel further comprises at least one extension rail extending outwardly of the hull in at least one of the first guide rail, the second guide rail and the third guide rail. 5. The method of claim 4,
The extension rail,
Crude oil drilling vessel connected to the hydraulic cylinder to expand and expand outboard by the operation of the hydraulic cylinder provided in the hull. The method of claim 3,
The guide rail portion,
A connection provided at an intersection area of the first guide rail, the second guide rail and the third guide rail, and selectively connected to at least one of the first guide rail, the second guide rail and the third guide rail. Crude oil drilling ship further comprising a rail portion. The method according to claim 6,
The connection rail unit,
A connection rail selectively connected to at least one of the first guide rail, the second guide rail and the third guide rail; And
A crude oil drilling ship supporting the connection rail and including a connection rail rotating plate provided to be rotatable relative to the hull. 8. The method according to any one of claims 2 to 7,
The drilling module moving unit,
Crude oil drilling vessel further comprises an inclination angle adjustment hydraulic cylinder connected to the guide rail portion for adjusting the inclination of the guide rail portion at a predetermined angle with respect to the deck surface of the hull.

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