KR20150121461A - Drill ship for polar region - Google Patents

Abstract

Disclosed is a drillship for a polar region, which has a weather tight structure to minimize an effect of an external environment on drilling operation in a polar region. The drillship for a polar region, which can perform drilling operation in a polar region, comprises: a derrick mounted on a hull for drilling operation; a moon pool formed to vertically penetrate a gap between a floor of the hull and an upper deck in a lower portion of the derrick; a drill floor installed in an upper portion of the moon pool to support the derrick; and a weather tight structure protecting the derrick and the drill floor from outside air. The weather tight structure comprises: a derrick protection plate surrounding the derrick; and a working area protection plate surrounding the drill floor. The derrick protection plate and the working area protection plate are connected to be displaced with respect to each other through a sliding connection unit.

Description

{DRILL SHIP FOR POLAR REGION}

Field of the Invention The present invention relates to drill rigs for polar poles, and more particularly to drill rigs for polar poles having a weather tight structure in order to minimize the influence of the external environment during drilling in the poles.

Examples of drilling equipment for exploring and drilling marine underground resources such as crude oil and natural gas include fixed platforms, semi-submersible rigs, and drill ships.

Of these, unlike a fixed platform that can not be moved or semi-submersible rigs that can only be moved in a limited range at close range, drill ships can be sailed on long distances with streamlined hulls and propulsion devices like ordinary ships .

On the other hand, marginal fields and deep-sea oil fields, which have been neglected due to economic difficulties due to the recent rise in prices of crude oil, have become economical. In addition, due to the rapid development of technologies required for exploration and mining of crude oil and natural gas buried in the seabed, it is expected to be used in shallow waters such as the continental shelf of about 200m depth, Working area is expanding.

As a result, there is an increasing need for polar drills capable of drilling in bad weather in the polar regions. Since the polar drilling rig is used in poles where the temperature is only 10 ° C in summer, drilling towers, ie drilling and drilling operation areas, are used to protect drilling equipment and workers from damage to weatheritic structures It needs to be overwritten by.

Conventionally, a drilling rig in which a weathertail structure is installed to perform a drilling operation in bad weather is disclosed in U.S. Patent No. 4,613,001 (1986.09.23) and U.S. Patent No. 3,749,162 (1973.07.31). U.S. Pat. No. 4,613,001 discloses a semi-submerged rig with a weathertail structure covering both derrick and drilling work areas, and US 3,749,162 discloses a fixed platform with a weathertail structure that covers only the drilling area except Derrick .

In the case of a semi-submerged league as disclosed in US 4,613,001, usually four or six columns are installed on a pontoon immersed in water and a substantially square deck is provided on the columns, That is, the left-right direction and the back-and-forth direction). In addition, in the case of a fixed platform as disclosed in US 3,749,162, a barge having a large hull width and a low height as compared with a general ship is used as a platform to fix the barge on ice in a lake or a river where the waves are not so severe, So that there is no room for applying an external force in the horizontal direction.

US 4,613,001 (issued September 23, 1986). US 3,749,162 (issued July 31, 1973).

However, in the case of drill ships, the length of the hull in the fore and aft direction is much longer than the width of the semi-submersible rig or barge because the ship has a streamlined hull for navigation. And is therefore very vulnerable to external forces in the horizontal direction, particularly in the lateral direction.

In addition, the pole girder is closed by the weathertight structure of the upper deck as well as the higher deck, so that the hull can be easily moved by the wind as well as by the waves.

If the hull behavior is caused by waves or winds, the derrick located at the upper part of the hull is displaced more than the hull, so that the welded structure welded by welding and surrounding the derrick and the weathertight structure surrounding the work area at the upper part of the hull So that there is a possibility that the welded portion is broken.

SUMMARY OF THE INVENTION In order to solve the problems described above, the present invention is characterized in that a derrick cover plate, which is a portion surrounding the derrick, and a work area guard plate surrounding the work area of the upper portion of the ship are integrally welded and fixed to each other, Which is capable of absorbing a displacement due to the behavior of the hull by being slidably connected to the hull of the ship.

According to an aspect of the present invention, there is provided a pole drilling rig capable of drilling at an extremity, comprising: a derrick mounted on a hull for drilling; A drain disposed below the derrick and extending vertically between a bottom of the hull and an upper deck; A drill floor installed above the door frame to support the derrick; A weathertail structure for protecting the derrick and the drill floor from outside air; Wherein the weathertail structure includes a derrick cover surrounding the derrick and a work area shield surrounding the drill floor wherein the derrick shroud and the work area shroud are displaceable relative to one another via a sliding connection Pole drilling rig is provided.

Wherein the sliding connection comprises a first connecting plate extending from the derrick shroud, a second connecting plate extending from the working area shroud, and a second connecting plate extending from the first connecting plate and the second connecting plate to allow sliding movement within a predetermined distance, And fastening means for fastening the connecting plates together.

The sliding connection portion may further include an elastic plate made of an elastic body and interposed between the first connection plate and the second connection plate.

Through holes may be formed in the first connection plate and the second connection plate so that the fastening means can penetrate.

At least one of the through hole of the first connection plate and the through hole of the second connection plate may be a slit-shaped long hole.

The through hole of the first connection plate and the through hole of the second connection plate are slit-shaped long holes, and the through holes may be elongated in different directions.

Wherein the through hole of the first connection plate has a long slit shape in a direction perpendicular or parallel to the derrick protection plate and the through hole of the second connection plate intersects the through hole of the first connection plate at a right angle It is possible to have a long slit shape in the direction to which the light is incident.

The polar rigging may further include shielding means for protecting the sliding connection portion from the outside air.

The shielding means may include a first shielding plate from the derrick shield plate, a second shielding plate extending from the first shielding plate, and a heater provided on the second shielding plate. In addition, the shielding means may further include a third shielding plate provided outside the heater.

The drill floor may be connected to the left and right walls of the hull through left and right extending floors extending horizontally from the drill floor.

Wherein a reinforcing material for reinforcing the strength of the drill floor is provided on a lower surface of the drill floor and the length of the reinforcing material in the up and down direction is shorter than the length between the drill floor and the door pillar, I can not.

The work area protection plate may surround the drill floor and the left and right extended floors together.

According to another aspect of the present invention, there is provided a pole drilling rig capable of drilling at an extremity, comprising: a drill floor supporting a derrick mounted on a hull for drilling; A weathertail structure for protecting the derrick and the drill floor from outside air; And the weathertail structure includes a derrick protection plate surrounding the derrick, a work area surrounding the drill floor and indirectly connected to the derrick protection plate so as to be relatively displaced through the sliding connection, Wherein the drill floor is connected to the left and right walls of the hull through left and right extending floors extending horizontally from the drill floor so that a load due to the derrick and a load due to the weathertight structure Is provided with a pole grip bar supported by the left and right walls of the hull.

According to the present invention, the derrick shroud of the weathertight structure and the work area shroud are integrally welded and fixed to each other, instead of being fixed to each other, they are slidably connected to each other within a constant displacement, Pole can be provided.

Therefore, according to the pole drill rig according to the present invention, stress can be prevented from concentrating on the connection portion between the derrick protection plate and the work area protection plate even if the hull behaves due to waves or wind, And the structural safety can be improved.

Further, according to the pole drill rig according to the present invention, a drill floor on which the derrick is installed is installed on the left and right side wall portions of the hull through left and right extension portions, and the drill floor is installed on the uppermost deck of the hull through a plurality of legs The displacement of the derrick can be reduced when the behavior of the hull is generated. Accordingly, it is possible to reduce the magnitude of the external force applied to the connecting plate between the derrick shield plate and the work area shield plate. Furthermore, it is possible to remove the column that was installed to support the drill floor, which is a structure that interferes with the work in the work area under the conventional drill floor, so that the work space in the work space can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view of a pole-based drill rig according to an embodiment of the present invention,
Figure 2 is a side view showing a sliding connection between a derrick shroud and a work area shroud, according to one embodiment of the present invention;
3 is a plan view of the sliding connection portion, and
4 is a side view showing a sliding connection between a derrick shroud and a work area shroud, in accordance with a variation of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pole drill rig according to an embodiment of the present invention will be described in detail with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a pole girder according to one embodiment of the present invention. As shown in Fig. 1, the polar-use drill rig is composed of a drilling tower, i.e., a derrick 21, which is mounted for drilling, and a lower deck 21, between the bottom 11 of the hull and the upper deck 13. [ A drill floor 25 provided above the door frame 23 to support the derrick 21 and a derrick 21 and a drill floor 25 which are provided on the outside of the door 23, Tight structure 30 for wrapping and protecting it to separate it from the web.

The derrick 21 is installed on the drill floor 25. The work space above the drill floor 25 is referred to as a drill work space 22 and the work space below the drill floor 25, that is, the work space between the drill floor 25 and the & (24).

The drill floor 25 is connected to the left side wall 15 and the right side wall 17 of the hull through the left and right extending floors 26, 27 extending substantially horizontally from the drill floor 25. [ The left side wall 15 and the right side wall 17 extend above the upper deck 13 at least in the central portion of the hull where the drill floor 25 is located (i.e., the center portion in the longitudinal direction of the hull) . Since the left and right extended floors 26 and 27 extend substantially horizontally, the height of the left wall 15 and the right wall 17 can be approximately determined to correspond to the height of the drill floor 25. [

The load of the derrick 21 itself and the working load at the derrick 21 are both transmitted to the drill floor 25 and the drill floor 25 and the drill floor 23 are provided with a drill floor 25, there is no structure such as a column or a wall. The load applied to the drill floor 25 is transmitted to the left side wall 15 and the right side wall 17 of the hull through the left and right extending floors 26 and 27. [ As a result, the load of the derrick 21 itself and the working load on the derrick 21 are transmitted to the left and right walls 15 and 17 of the hull through the drill floor 25 and the left and right extended floors 26, ).

1, a reinforcing member 28 may be provided on the lower surface of the drill floor 25, as indicated by the inverted T-shape. The size and number of the reinforcements 28 can be appropriately increased or decreased as needed in designing the hull. The lower surface of the drill floor 25 as well as the lower surface of the left and right extended floors 26 and 27 and the portion of the left extended floor 26 that meet the left side wall 15 of the hull, 27 and the right side wall 17 of the hull can be provided with a suitable number of stiffeners.

As used herein, the expression "there is no structure supporting the drill floor 25" means that a structure such as a column or a wall installed in the work space 24 for supporting the load of the drill floor 25, Which means that there is no structure that interferes with the drilling operation in the work space 24, and usually a level of reinforcing material used to reinforce the strength of the deck during the manufacture of the hull (for example, Or the like) on the lower surface of the drill floor 25, the left and right extended floors 26, 27, and the like.

The weathertight structure 30 for protecting the drill working space 22 from outside air includes a derrick protection plate 31 surrounding the derrick 21 and a work area protection plate 33 surrounding the drill floor 25 do. As shown in Fig. 1, the work area protection plate 33 can be installed so as to surround and protect the drill floor 25 as well as the left and right extending floors 26, 27.

The loads due to the derrick protection plate 31 and the work area protection plate 33 itself and the loads due to the external force applied to the derrick protection plate 31 and the work area protection plate 33, And the right side wall 17, respectively.

As described above, according to the embodiment of the present invention, since there is no supporting structure such as a column or a wall between the drill floor 25 and the door frame 23, the load of the derrick 21 and the load of the weathertight structure 30 The loads are all supported by the left side wall 15 and the right side wall 17 of the hull.

The derrick cover plate 31 may be attached to the derrick 21. When the hull greatly fluctuates due to the wind or wave, the derrick 21 may swing back and forth, and the upper portion of the derrick 21 may be displaced forward, backward, leftward and rightward. At this time, stress concentration due to the displacement of the derrick may occur at a portion where the derrick cover plate 31 attached to the derrick 21 and the work area guard plate 33 attached to the hull are connected.

2 and 3, according to an embodiment of the present invention, in order to avoid stress concentration between the derrick cover plate 31 and the work area protection plate 33, (31) and the working area protection plate (33) are connected to each other so that a relative displacement can be made with respect to each other within a predetermined interval.

2 is a side view partially showing the sliding connection portion 40 between the derrick protection plate 31 and the work area protection plate 33. A plan view partially showing the sliding connection portion 40 is shown in Fig. .

The sliding connection portion 40 according to an embodiment of the present invention includes a first connection plate 41 extending from the derrick protection plate 31, a second connection plate 43 extending from the work area protection plate 33, An elastic plate 45 made of an elastic material and interposed between the first connection plate 41 and the second connection plate 43; a first connection plate 41, (48, 49) for fastening the second connecting plate (45) and the second connecting plate (43) together.

The first connecting plate 41 extending from the derrick cover plate 31 may be integrally joined to the derrick cover plate 31 by welding or the like and may be joined by rivets, bolts, nuts, or the like. The derrick cover plate 31 may extend in a vertical direction or may extend obliquely. Regardless of this, the first connection plate 41 is joined to the derrick cover plate 31 so as to extend in a substantially horizontal direction.

1 and 2, the first connection plate 41 is shown extending substantially horizontally at the lower portion of the derrick cover plate 31, but the first connection plate 41 is provided at the lower end of the derrick cover plate 31 And may be deformed to extend from the lower end.

The second connection plates 43 extend substantially in the horizontal direction from the work area protection plate 33 and are spaced apart from the derrick protection plate 31 and are not in contact with each other. As a result, the work area protection plate 33 is indirectly connected so that relative displacement is possible only through the sliding connection portion 40 without being directly connected to the derrick protection plate 31. [

The second connection plate 43 extends from the work area protection plate 33 toward the derrick 21 for convenience of explanation. The second connection plate 43 and the work area protection plate 33 may not be formed as separate members and the second connection plate 43 may be formed as a part of the work area protection plate 33, Or the edge portion toward the derrick 21 in FIG.

The bolt 48 and the nut 49 may be used as the fastening means and the first connecting plate 41, the elastic plate 45 and the second connecting plate 43 may be formed so as to allow the bolt 48 to pass therethrough. Through holes (42, 44, 46) are formed, respectively.

At least one of the through-holes 42 formed in the first connection plate 41 and the through-holes 44 formed in the second connection plate 43 are formed in a manner as shown in Fig. 3 And may be a slit-shaped slot as shown in FIG.

Although the through hole 42 formed in the first connection plate 41 has a slit shape in FIG. 3, the through hole 42 of the first connection plate 41 is perpendicular to the derrick cover plate 31 And the through hole 44 of the second connection plate 43 may have a long slit shape in a direction parallel to the derrick cover plate 31. [ Or the through hole 42 of the first connecting plate 41 has a long slit shape in a direction parallel to the derrick cover plate 31 and the through hole 44 of the second connecting plate 43 is formed of a derrick cover plate 31 in the vertical direction.

That is, the through hole 42 of the first connection plate 41 and the through hole 44 of the second connection plate 43 may have a long slit shape in a direction perpendicular to each other. When the through hole 42 of the first connection plate 41 and the through hole 44 of the second connection plate 43 are elongated in different directions as described above, the displacement of the derrick 21 in the front- Can be absorbed by the sliding connector (40).

The elastic plate 45 may be made of, for example, rubber. According to the embodiment of the present invention, the load applied to the sliding connection portion 40 can be absorbed by the elastic plate 45, so that the structural safety against repeated loads occurring during operation of the drill rig can be improved.

That is, instead of being fixed to each other by welding, the derrick shroud 40 and the working shroud shroud 40 are integrally fixed to the derrick shroud 31 and the work area shroud 33 are slidably connected to each other, the displacement due to the behavior of the hull can be absorbed, thereby greatly improving the structural safety.

The drill floor 25 on which the derrick is installed is installed on the left side wall 15 and the right side wall 17 of the hull through the left and right extending floors 26, The displacement of the derrick can be reduced when the behavior of the hull is generated as compared with the structure in which the drill floor is provided on the upper deck of the hull through a plurality of legs as in the prior art. Accordingly, it is possible to reduce the magnitude of the external force applied to the connection portion between the derrick protection plate 31 and the work area protection plate 33. Furthermore, it is possible to remove the column that was installed to support the drill floor, which is a structure that interferes with the work in the work area under the conventional drill floor, so that the work space in the work space can be increased.

As described above, the polar-use drill rig according to the embodiment of the present invention has a "monocoque-type" hull which supports the load only by an outer structure (i.e., a hull structure) constituting the outer shape of the hull. Accordingly, even if a separate supporting column or a wall is not provided in the work space 24 in which the drilling operation is performed, it can withstand the operating load and the environmental load that may occur during the drilling operation by the left and right side walls 15 and 17 of the hull . This not only eliminates the need for a separate structural reinforcement for the space required for drilling in the poles, but also effectively secures the drilling workspace in the poles and increases the space utilization in the upper section of the platform 23 .

As shown in FIG. 4, the polar-use drill rig according to the modified embodiment of the present invention has a sliding connection portion 40 for preventing stress concentration between the derrick protection plate 31 and the work area protection plate 33 from outside air And further includes a shielding means 50 surrounding the sliding connection portion 40.

The shielding means 50 includes a first shielding plate 52 extending substantially in the horizontal direction from the derrick shield plate 31 and a second shielding plate 53 extending in the substantially vertical direction from the first shielding plate 52. [ And a heater 54 mounted on the second shielding plate 53. [

The first shielding plate 52 is extended from the derrick shield plate 31 above the first connecting plate 41 of the sliding connection unit 40 so as to cover the sliding connection unit 40 and the first shield plate 52 Is bent downward.

The second shielding plate 53 extends downward from the first shielding plate 52 so as to substantially abut the upper surface of the second connecting plate 43 extending from the working area shielding plate 33. The second shielding plate 53 is provided at its distal end with a sealing portion 55 which can be made of a rubber plate or a brush for example and a direct connection is made between the second shielding plate 53 and the second connecting plate 43 So that it is possible to prevent the outside air from flowing freely.

The second shielding plate 53 is provided with a heater 54 so that the air can be heated while passing through the air. The heater 54 may be, for example, a thermal oil heater. As the heater 54, any kind of heater can be used as long as the cool outside air flowing into the inside of the shielding means 50 can be heated while passing through the heater.

On the other hand, the third shielding plate 56 may be installed outside the heater 54 so that the air (i.e., wind), rain, seawater, etc. supplied to the heater 54 does not hit the heater 54 directly . The third shielding plate 56 can be extended upward from the second connecting plate 43 (or the working area shielding plate 33) of the sliding connection portion 40 and the bent portion of the first shielding plate 52 And may be positioned between the distal end portion 52a and the second shielding plate 53.

By the shielding means 50, air reaching zero degrees Celsius does not come into direct contact with the sliding connection portion, particularly the elastic plate 45, so that the function of the elastic plate can be prevented from deteriorating.

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 is to be understood that various modifications and changes may be made by those skilled in the art.

11: bottom of the hull
13: Upper deck
15: Left side wall (of hull)
17: Right wall of (hull)
21: Derrick
22: Drill workspace
23:
24: Work space
25: Drill Floor
26: Left extended floor
27: Right extension floor
28: Stiffener
31: Derrick Shield
33: Working area shield
40:
41: first connecting plate
42: through hole (of first connecting plate)
43: second connecting plate
44: through hole (of the second connecting plate)
45: elastic plate
46: through hole (of elastic plate)
48: Bolt
49: Nuts

Claims (14)

As an amphibious drilling rig capable of drilling in the polar regions,
A derrick mounted on the hull for drilling;
A drain disposed below the derrick and extending vertically between a bottom of the hull and an upper deck;
A drill floor installed above the door frame to support the derrick;
A weathertail structure for protecting the derrick and the drill floor from outside air;
/ RTI >
The weathertail structure includes a derrick shroud surrounding the derrick and a work area shroud surrounding the drill floor,
Wherein the derrick shroud and the work area shroud are displaceably connected to each other through a sliding connection. The method according to claim 1,
Wherein the sliding connection comprises a first connecting plate extending from the derrick shroud, a second connecting plate extending from the working area shroud, and a second connecting plate extending from the first connecting plate and the second connecting plate to allow sliding movement within a predetermined distance, And a fastening means for fastening the connecting plates together. The method of claim 2,
Wherein the sliding connection portion further comprises an elastic plate made of an elastic body and interposed between the first connection plate and the second connection plate. The method of claim 2,
And a through hole is formed in each of the first connection plate and the second connection plate so that the fastening means can penetrate. The method of claim 4,
Wherein at least one of the through-hole of the first connection plate and the through-hole of the second connection plate is a slit-shaped long hole. The method of claim 4,
Wherein the through hole of the first connection plate and the through hole of the second connection plate are slit-shaped slots, and the through holes are elongated in different directions from each other. The method of claim 6,
Wherein the through hole of the first connection plate has a long slit shape in a direction perpendicular or parallel to the derrick protection plate and the through hole of the second connection plate intersects the through hole of the first connection plate at a right angle It has a long slit shape in the direction of the pole. The method according to claim 1,
Further comprising a shielding means for protecting said sliding connection from outside air. The method of claim 8,
Wherein the shielding means includes a first shielding plate from the derrick shield plate, a second shielding plate extending from the first shielding plate, and a heater provided on the second shielding plate. The method of claim 9,
Wherein the shielding means further comprises a third shielding plate provided outside the heater. The method according to claim 1,
Wherein the drill floor is connected to the left and right walls of the hull through left and right extending floors extending horizontally from the drill floor. The method according to claim 1,
Wherein a reinforcing material for reinforcing the strength of the drill floor is provided on a lower surface of the drill floor and the length of the reinforcing material in the up and down direction is shorter than the length between the drill floor and the door pillar, Do not do that, pole drill rigs. The method of claim 11,
The work area protection plate enclosing the drill floor and the left and right extending floors together. As an amphibious drilling rig capable of drilling in the polar regions,
A drill floor supporting a derrick mounted on the hull for drilling;
A weathertail structure for protecting the derrick and the drill floor from outside air;
/ RTI >
The weathertight structure includes a derrick cover surrounding the derrick, and a work area guard plate surrounding the drill floor and indirectly connected to the derrick cover plate so as to be relatively displaceable through a sliding connection part, ,
Wherein the drill floor is connected to the left and right walls of the hull through left and right extending floors extending horizontally from the drill floor so that the load due to the derrick and the load due to the weathertight structure are transmitted to the left The pole is supported by walls and right walls.

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